SY20 0884 3_VM370_Rel_6_Data_Areas_and_Control_Block_Logic_Mar79 3 VM370 Rel 6 Data Areas And Control Block Logic Mar79
User Manual: SY20-0884-3_VM370_Rel_6_Data_Areas_and_Control_Block_Logic_Mar79
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File N-o. 8370-36
Order No. 8Y20-0884-3
IBM Virtual Machine
Facility/370:
Data Areas and Control
Block Logic
Systems
I
Release 6 PLC 1
This publication, together with the VM/370 System Logic
and Problem Determination Guide, Volumes 1, 2, and 3,
is intended for use by system programmers responsible
for updating VM/370. This publication contains
descriptions of the major data areas and control blocks
used by three of the components of VM/370, the Control
Progra...TTI (CP), the Conversational Monitor System (eMS),
and the Remote Spooling Communications Subsystem
(RSCS).
To use this publication effectively and to understand
it thoroug.llly, the following publications are
prerequisite:
IBM System/370 Principles of Operation
Order No. GA22-7000
IBM OS/VS, DOS/VS, and VM/370Assembler Language,
Order No. GC33-4010
--...--------- ----~
-- - - . --------..
-~-
-~-
This is a aajor revision of, and obsoletes. 5120-0884-2 and Technical
Bewsletters 5B25-0413, 5125-0453, and 5125-0466. This edition applies
to ~~!~ § R1~ 1 (Prograa Level Change) of the IE! Virtual !achine
Facility/370, and to all subsequent releases unless otherwise indicated
in new editions or Technical Bewsletters.
Technical changes and additions to text and illustrations are indicated
by a vertical bar to the left of the change.
Changes are periodically aade to the inforaation herein; before using
this publication in connection with the operation of IB! systeas,
consult the latest I~~ ~st~!Ll1Q ~!Qli2[raphy, Order Ro. GC20-0001, for
the editions that are aFplicable and current.
Publications are not stocked at the address given below; requests for
copies of IB! publications should be aade to your IE! representative or
to the IB! branch office serving your locality.
A fora for readers' coaaents is
provided at the back of this
publication. If the fora bas been reaoved, co.aents aay be addressed to
IE! corporation, Y!/370 Publications, Dept. D58, Eldg. 706-2, P.O. Box
390, Poughkeepsie, lew york 12602. IB! aay use or distribute any of the
inforaation yOu supply in any way it believes appropriate without
incurring any Obligation whatever. Iou aay, of course, continue to use
the infor.ation you supply.
©
copyright International
1979
Business !achines corporation
1916, 1977,
Preface
This publication contains descriptions of
major data areas and control blocks used by
the three major components of V"/370. The
three cOllponents are:
I •
The Control Prograll (CP)
I •
The Conversational Monitor System (CMS)
I •
I
The
Remote
Spooling
Subsystem (RSCS)
•
•
Facil!llL37.Q: Service
Routi!!es
19qic, Order No. SY20-0882.
RELATEr PUBLICATIONS
Comllunications
There
are
three
sections
appendixes, as follows:
•
8afl!in~
£IQgIg~
and
This
putlication
conjunction with:
should
be
used
in
five
"Section 1. CP Data Areas and Control
Blocks" contains information about CP
data areas and control blocks.
"Section 2. CMS Data Areas and Control
BloCKS" contains information on CMS data
areas and control blocks.
"Section 3. RSCS Data Areas and Control
Blocks" contains information on RSCS
data areas and control blocks.
1 Control Pr.Q.9!U (Q), Order
No. 5Y20-0886
!olum~
!oly!~
(CM~),
~X~~~~
l Conversatienal MCni!.Q£
sys!~
Order No. Sy20-0887
~~~2~~~~~~
Guide,
Order
No.
GC20-i807 •
"Appendix A. CP and RSCS Equate Symbols"
contains
assembler
language
equate
symbols used by CP and RSCS to reference
data.
•
"Appendix
B.
RSCS
Control
Areas"
contains RSCS control areas that define
constants and variables
used during
execution.
•
"Appendix C. RSCS
Request Elements"
contains RSCS request eleaents that are
the tables used by RSCS for task-to-task
communication.
•
"Appendix
D.
CMS
Equate
contains CMS equate symbols.
•
"Appendix E. Data Areas and Control
Block References" contains information
on the modules that reference data areas
and control blocks.
For information on how to use the fourth
component
interactive problem centrol
system -- and its facilities, the hardware
and software support
perscnnel or the
installation system programmer should use:
IEM
Virtual
Machine
Facility/370:
!n!~~£!!ve pro~le~ CO~lrol system
(IP~~)
.!!§~I~ Guide, Order No. GC20-1823,.
Symbols"
OTHER VM/370 DATA AREAS AND CONTROL BLOCKS
Some data areas and control blocks that
affect VM/370 service and support programs
are not included
in this publication.
Information on these data areas and control
blocks can be found in the I~~ ViItua!
This publication addresses and describes
the major control blocks associated with
CP, CMS, and RSCS.
Generally, data areas,
or scratch areas that are created and exist
only during the execution ef a particular
module
are
not
described
in
this
publication. In this publication, the data
areas and control blocks are arranged in
alphabetical order by DSECT name.
The CMS and RSCS cOllponents operate
under control
of CP.
Each component
creates, updates,
and erases
its own
control blocks and data areas.
Preface
iii
Control blocks and data areas are blocks
of related information applicable to one or
aore system functions.
They are usually
defined by the DSECT instruction.
The
blocks can reflect current status, history
information, or
combinations of
both,
applicable to VM/310 functions.
Control
blocks and data areas provide the linkage
and information for the user, the hardware,
and the programs to vork as one entity for
the successful execution of a job, task. or
process.
The following terms in this publication,
refer to the indicated support devices:
For every data area or control block, a
statement is given that defines the use of
the data area or control block.
This
statement is followed by a formatted block
showing the fields defined in the data area
or control block and the displacement into
the DSECT of that field.
•
"2305" refers to IB! 2305 Fixed
Storage, Models 1 and 2.
Bead
•
"210x" refers to IB! 2101, 2102, and
2103 Transmission Control Units or the
Integrated Communications Adapter (ICA)
on the System/310 Model 135.
•
"2141" refers to the IBM 2141 and the
3161, unless otherwise specified.
•
"3210" refers to a series of display
devices, namely, the IBM 3275, 3216,
3211, and 3218 Display Stations.
A
specific device type is used only when a
distinction is required between device
types.
Information about display terminal usage
also applies to the IBM 3138, 3148, and
3158 Display Consoles
when used in
display mode, unless otherwise noted.
The formatted blocks for CP and CMS
control areas are 8 bytes wide, showing two
fullwords per line.
RSCS control blocks
are 4 bytes vide.
Any information pertaining to the IEM
3284 or 3286 Printer also pertains to
the IBM 3281, 3288, and 3289 printers,
unless otherwise noted.
!2te: One exception to this width rule is
the formatting for PSA, where the control
areas are given in 16-byte width.
When the name of a field is too large to
f it in t 0 the forIa_t.t_e_dli.ne, ap_oin.ter to
the definition of the field is used instead
of the name of the field. This pointer
usually takes the form A*1, A*2, etc. When
there is a particularly large field
(one
that uses mere than three or four lines of
the formatted block), ellipses are used in
the block to show that the displacement of
this field is larger than can be shown in
the block.
•
"3330" refers to the IBM 3330 Disk
Stor age, .Mo.dels 1, 2, or 11; the IE!
3333 Disk Storage and Control, Models 1
or 11; and the
3350 Direct Access
Storage operating in 3330/3333 Model 1
or 3330/3333 Model
11 compatibility
mode.
•
"3340" refers to the IBM 3340 Disk
Storage, Models A2, B1, and B2, and the
3344 Direct Access Storage Model B2.
The use of slashes in a field indicates
that the field is reserved for IBM's use.
•
"3350" refers to the IBI! 3350
Access Storage Models A2 and
native mode.
•
"310x" refers to IEM 3704
Communications Controllers.
•
The term "3105" refers to the 3105 I and
the 3705 II unless otherwise noted.
The formatted block
is followed by
listing-related information such as the
hexadecimal displacement of the field into
the DSECT, the name of the field and its
definition in the listing, and a brief
description of the contents and meaning of
the field,.
iv
IBM VM/310 Data Areas and Control Blocks Logic
and
Direct
E2 in
3105
Contents
SU~MARY
OF AMENDBENTS ••
1.%
SECTION 1. CP DATA AREAS and CONTROL
BLOCKS. • • • • • • ••
• • • •
.1
ACCTELOK: User Accounting Block. • •
.2
ACBTELOK: Accounting Card Buffer Block •• 2
ALOCBLOK: DASD Cylinder Allocation Block .4
ESCBLOK: Binary Synchronous Communication
Control Block • • • • • • • • • _ • • • • 6
BUFFER • • • • • • • • • _ • • • • • ____ .8
CCHREC: Channel Check Handler Record. _ .9
CCFARM: Communications Controller
Parameter List • • • • • • ~ • • • • • • 11
CHIBLOK and CHYBLOK: Virtual
Channel-to-Channel Adapter Control
Elocks •• _• • • • • • • _ • • • _ • • • 12
CKPBLOK: Telecommunications Checkpoint
Block • '. '. _ • • • • _ • •
• 14
CONTASK: Console I/O Package • • • • • • 15
CORTABLE: Storage Allocation ~able • _ • 17
CPEIELOK: CP Execute Block . . . . . . . . 18
DDRREC: Reconfiguration Macro • • • • • • 19
D!PINREC: Dump File Information Record • 20
DMPKYREC: Dump File Key Storage Record • 21
D!PTEREC: Dump File Symbol Table Record. 21
ECBLOK: Extension to VMBLOK for Virtual
!achine with Relocate • _ • • _ •
22
ERRELOK: Error Block Used to Build
OBR/MDR • _. • .. • • • .. .. .. • • •
24
IOBLOK: I/O Task Control Block • • • • • 25
IOERBLOK: IIO Error Information Block. - 27
IRMBLOK: Intensive Error Recording Mode
Elock. • • • • • • • • • •• • • •
31
JPSCELOK: Journaling and Password
Suppression Control Block • • • • • • • 32
LOCKELOK: Userid Lock Control Block.
33
MCH!RE!: Machine Check Save Area • • • • 34
!CRECORD: Machine Check Handler Record
37
MDRREC: Miscellaneous Data Recording
Record. _ • • • • ~ • .. • • • • • • • .. 38
MICBLOK: Virtual Machine Pointer List
for VM/370 Hardware Assist . . . . . . . . 39
MIHREC: Missing Interrrupt Handler Error
Record. • • • • • • • • • • • • • • • • 40
MNHDR: VM/370 Monitor Record Header • • • 41
MNOOO: VM/370 Monitor Perform Class
Record. • • • • • • • • . . . . . . . . . 42
MN001: VM/370 Monitor Perform Class
Record. • • • • • • ~ • • • • • • • • • 45
MI097: VM/370 Monitor Header Records •• 46
MN098: VM/370 Monitor Trailer Record • '. 46
MN099: VM/370 Monitor Suspension Record. 47
M110I: VM/370 Monitor Response Class
Records _ _ • • • • • • _ • • • • • • _ 47
MN20I: VM/370 Monitor Schedule Class
Records • • • • • • • • • • • • • • • • 48
M1400: VM/370 Monitor User Class Record. 49
MN500: VM/370 Monitor Instruction
Simulation Class Record • •
• 50
MN600: VM/370 Monitor DASTAP I/O Count
Records • • • .. • • • .. • • • • • • • • 51
MN602: Vft/370 ftonitor DlST!P Utilization
Record • • • • • • • • • • • • • • • • • 52
M1700: VM/370 Monitor Seeks Class Record 53
MN802: VM/370 Monitor System Profile
Class • • • • • • • • • • • • • • • •• 54
MNDEVLST: VM/370 Monitor Class 6
(DASTA P) Device List. • • • • • • • • • 55
MCNCOM: VM/370 Monitor Communications
Area • • • • • • • _. • • • • • • •
.56
MSSCOM: MSS Communications Control Block 59
NCPTBL: Named 3701 Control Program Table 60
NICBLOK: Network Interface Control Block 61
IPBTBL: Named 3800 Image Library Table. 63
OBBRECN: Unit Check Error Record (long
Outboard Record). • • • • • • • • • • • 64
OBBREC: Unit Check Error Record (Short
Cu tb oa rd Rec 0 rd). • • .. • • • • • • • • 66
OWIDLIST: CP-Owned Volumes List • • • • • 67
PAGTABLE : Translation Page Table • • • • 67
PGBLOK: Pseudo Page Fault Stack Block •• 68
PSA: Prefix Storage Area (Low Storage
Lcca tions). • • • • • • • • • • •
• 69
PWDIBLOK: Password Invalid Block •
78
REAL I/O CONTROL BLOCKS. • • •
79
Beal Channel Control Blocks.
79
Beal Control Unit Blocks • •
79
Beal Device Control Blocks • •
79
Input/Output Blocks. • • • • • _ ..
79
Network I nterface Control Block '.
• 80
RCHBLOK: Real Channel Block. • • • •
81
RCUBLOK: Beal Control Unit Block • •
82
RCWTASK: Translated Virtual I/O CCWoo
84
RDEVBLOK: Real Device Block • • • • • • • 85
RECBLOK: DASD Page (Slot) Allocation
Block • • • • • • • • • • • • • _ _ • • 89
RECPAG: Error Recording Page Record.
90
RSFLCTL: Beal Spooling Control Bloc~
91
RSPIELOK: tteai Device Extens10n EloCK •• 91
SAVEAREA • .• • • • • • • • • • • • •
92
SAVTABLE: First Page on Saved system
DASD . . . . . . . . . . . . . . . oo.
93
SDRBLOK: Statistical Data Recording
Block • • • • • .. • • • • • • • • • • • 94
SEGTABLE: Translation Segment Table • • • 95
SFBLOK: SFool File Block • • • • • •
96
SHCBLOK: Spool Hold Queue Block • • • • • 98
SHETABLE: Named-Shared Segment Systems
Table • • • • • • • • • • • • • • • • • 99
SFLINK: SFool Page Buffer Linkage Block.1eO
SWPTABLE: Swap Table for Virtual
Machine Paging • • • • • • • • • • • • • 101
SYSLOCS: System Low Storage Information
Block. • • • • • • • • • ••
• •• 102
SYSTBL: Named System Table. •
• .103
TNSREC: "T" Type Record Format
(Environmental Recording) • • • •
.104
TREIT: Virtual Machine Tracing
Extension to VMBLOK • .. • • • • • • • .105
TECBLOK: TOD Clock Comparator Request •• 107
UDBFBLCK: User Directory Buffer Block •• 108
UDEVBLOK: User Device Block. •
.109
UDIRBLOK: User Directory Block • • • • • 110
Contents
v
UMACELOK: user Machine Block.
.111
VIRTUAL I/O CONTROL BLOCKS. •
.113
Virtual Channel Blocks. • •
.113
Virtual Control Unit Blocks • • • • • • 113
Virtual Device Blocks.
• • • • • 113
VCHBLOK: Virtual Channel B l o c k . 1 1 4
VCONCTL: Virtual Console Control Block .115
VCUBLOK: virtual Control unit Block • • • 116
VDEVBLOK: Virtual Device Block • . • • • • 117
VFCBELOK: virtual Forms Control Buffer
Elock • • • • • • • • • • • • • • • • • 120
VMABLOK: Shared Systems Control
Addition to VMBLOK • • • • '• • • • • • • 120
VMBLOK: Virtual Machine Control Block • • 121
VMCBLOK: Virtual Machine Communication
Block. _ • • • • • • • • • • •
.128
VMCMHDR: VMCF Message Header • • • _ •• 129
VMCPARM: VMCF Parameter List • • • _ • • 130
VRRBLOK: Virtual ReservejRelease Block .131
VSPLCTL: Virtual Spooling Control Block.132
VSPXELOK: virtual Spool Extension Block.133
IINTELOK: External Interrupt Block • • • 134
IOBR3211: Extended Outboard Recording
Block. •
• • • • • • • • • • • • • 135
SECTION 2. CMS DATA AREAS AND CONTROL
BLOCKS. .•
• • • • • • • • • • ,• • • 137
AETAB: Abend Termination option Table •• 138
AEWSECT: Abend Recovery Workspace.
..139
AtTSECT: Active Disk Table _ • • • • • • 140
AFTSECT: Active File Table • ~ • • • • . • 143
ANCHSECT: Anchor Table • • • • • • _ •• 145
EATLSECT: CMS Batch USEr Job L i-a its .... ,,146
EEOI: Boundary Box • • • • • • • • • • • 146
EGCOM: DOS/VS Partition Communication
Region • • • • • • • • • • • • • • • • • 147
CMSTAXE: Terminal Attention Exit
Element • • • • • • • • _ • • • • • • • 149
CVTSECT: Communication Vector Table as
supported by CMS • • • • • • • • • • • • 150
DEGSECT: Debug Work Area. '• • • • • • • 152
DEVSECT: Device Table DSECT • • • • • • . • 156
DFVTAE: Device Table • • • • • • • • • • 157
DIOSECT: Disk I/O Work Area • • • • • • • 160
DMSCCB: Command Control Block.
.162
tOSSECT: DOS Simulation Control Block •• 164
EDCB: Edit Control Block • • • • • • • • 166
ERDSECT: Error Handling Routine DSECT •.• 174
EXTSECT: External Interrupt Work Area •• 177
EXTUAREA: External User Area • • • • • • 179
FCBSECT: Simulated OS Control Blocks •• 180
FCBTAB: Fetch Table. • • • • • • •
.184
FICL: First In Class Block • • • • • • • 185
FRDSECT: Free Chain Element Header
Elocks. • • • • • • • • • • • • •
.• 186
FSCBD: File System Control Block •
.188
FSTD: File Status Table Entry DSECT •• .189
FSTSECT: File Status Table • • • • • • • 190
FVSECT: Fixed Variable Storage Work
Area for CMS File System • • • • • • • • 191
IHADECB: Data Event Control Block • • • • 195
IOSECT: I/O Interrupt Save Area • • • • • 196
KEYSECT: Disk Key Table DSECT for BDAM
Simulation • • • • • • • • • • • • • • • 197
LtRST: Loader Storage Area • • • • • • • 198
LUETAB and LUEPR: Logical Unit Block
Table • • • • • • • • •
• • • • • 202
vi
NICL: Number in Class. • • • • • •
.204
NUCON: Nucleus Constant Area • •
• .205
OFSECT: Major CSECT for all I/O
Operation Lists • • • • • • • • • • • • 219
OSFST: OS File Sta tus Tatle. • •
• .222
OVSECT: Describes the First Few
Lccations of DMSOVS • • • • • • • • • • 224
PCTAB: Progra II Check Option Tabl e.
.224
PDSSECT: Directory Table for EPAM
Simulation. • • • • • • • • • • •
.225
FGMSECT: Program Interrupt Work Area •• 226
PIBADR: Program Information Block • • • • 227
PIB2TAB: Program Information Block
Extension • • • • • • • • • • • • • • • 228
PUBADR: Physical Unit Block Table • • • • 229
PUBOWNER: Physical Unit Elock Ownership
Table. • •• • • • • • • •
• •• 230
SSAVE: System Save Area. • • • • •
.231
SUBSECT: Subset Work Are a. • • • • • • .233
SVCSECT: SVC Interrupt Storage . • • • • • 234
SVEARA: LTA and PP Save Area DSECT • • • 238
SYSC08: System Communication Region • • • 239
SYSNA8ES: Saved Systems Names.
.242
TSCBLKS: TSO Control Blocks.
.243
USAVE: User Save Area. • • •
• • • • 245
USERSECT: User Work Area • •
• .245
SECTION 3. RSCS DATA AREAS AND CONTROL
BLOCKS. • • • • • • • • •
• • • • • 247
ASINE: Asynchronous Exit Element • • • • 248
BUFDSECT: SML Telecommunications Buffer.249
COMDSECT: Address Constants as Pointers.250
DEVTABLE: NPT Device Table • • • • • • • 251
FR-EE-E·:-·A Free·Blelle-at on the SupervisorElement Cueue • • • • •
• • • .252
GIVE Request Table • • • • • • •
.253
GIVEE: A GIVE Element. •
.253
IOE: An I/O Element. • •
.254
IOTABLE: An I/O Table. •
.255
LINKTABL: Link Table • • • • • • •
.256
RE CBLOCK: NPT Request Block.
.258
ROUTE: Routing Table Entry.
.259
SVECTORS: Low Storage Definitions.
.260
TAG: RSCS File Descriptor. • • • •
.263
TAGAREA. • •• • • • • • • • •
.265
TAKE Request Table • • • • • • •
.265
TANKDSEC: S8L Unit Record Tank
.266
TAEEA: A Task Save Area. • •
.267
TASKE: A Task Element.
.269
TCTDSECT: Task Control Tatle
.270
AFPENDIXES • • • • • • • • • • • • • • • 273
AFFENDIX A. CP and RSCS EQUATE SY8BOLS .275
VM/370 Device Classes, Types, 8odels,
and Featurese
276
VM/370 EQUATE SYMBOLS -- Machine Usage .278
VM/370 EQUATE SYMBOLS -- Extended
Centrel Registers • • • • • • • • • • • 279
VM/370 EQUATE SYMBOLS -- CP usage • • • • 280
VM/370 Registers • • • •
.283
e
AFPENDIX E.
AIS Moniter
REX Monitor
SML Moniter
IBM VM/370 Data Areas and Control Block Logic
e
•••••••••••
RSCS CONTROL
Control Area
Control Area
Centrol Area
AREAS
•
••
•
.285
• • • • 286
• • • 287
• .288
• 291
AFPENtIX C. RSCS REQUEST ELEMENTS.
• 292
Command ALERT Element Format A1.
.292
Cper ational Notes. • • • •
• 293
Command ALERT Element Format A2 • •
• 293
Operational Notes • • • • •
.294
Command ALERT Element Format LO • •
.294
Operational Notes • • • • •
Command ALERT Element Format L1 • •
.296
.296
Operational Notes • • • • •
.297
Command ALERT Element Format L2.
.297
Operational Notes • • • • •
Command ALERT Element Format L3 (also
.298
Message Alert Element).
.298
Operational Notes • • •
e
e 299
Command Request Element.
.299
Operational Notes • •
File Request Element •
• • • • • 300
Operational Notes • •
.300
Line Alert Element • •
• • • • • 302
Operational Notes • •
• • • • • 302
MeEsage Bequest Element •
.303
CFeratienal Notes • • • • • • • • • • • 303
Pert Table • • • • • • • • • • • • • • • 304
CFeraticnal Notes • • •
• • • 304
Terminate Request Element •
.305
CFeratienal Notes. •
• .305
APFENDIX D. CMS EQUATE SYMEOLS • • • • • 307
CMS Usage Equates. • • •
• • .308
CMS Register Equates.
• • • • • • • 309
AFFENDIX E. DATA AREAS AND CONTROL
BLeCK REFERENCES. • •
• • • •
.311
Cf Control Bleck References.
.312
CMS Contrel Elock References
• • 321
RSCS Control Elock References.
• • • 326
Contents
vii
FIGURES
Figure
1.
Figure
2.
viii
CP Control Block
Relationships ••••••••••••••• ~.1
CftS Control Block
Relationships •••••••••• _ •• ~.137
IBft Vft/370 Data Areas and Control Block Lcgic
Summary of Amendments
for SY20-0884-3
VM/370 Release 6 PLC 1
3800-1 PRINTER SUPPORT
of
the active
Monitor spool
file
frequently enough to support real time
data reduction and display.
Be!: Documentation and Program Support
VM/370 now offers support for the 3800-1
unit as a dedicated virtual machine
printer. The 3800~1 is also
as a VM/370 spooling device.
3850-2 VIRTUAL MACHINE MSS SUPPORT
!~!:
Program and Documentation
VM/370 now supports the 3850-2 MSS to
permit most operating systems that are
running
in
the
virtual
machine
environment access
to data
on ftSS
virtual volumes.
SECURITY JOURNALIIG SUPPCRT
!~;
Program Feature
VH/370 now supports the journaling of
LOGONs and AUTOLOGs specifying invalid
passwords and the journaling of all
linkages. This is accomplished via the
generation of type 04,
OS, and 06
accounting records. The new support is
specified in the SYSJRL macro in DMKSYS.
4331 AND 4341 PROCESSOB SUPPOBT
PASSWORD-ON-THE-COMMAID-LIIE SUPPRESSION
!~:
!~!:
program Feature
Vft/370 now supports the suppression of
the entering of passwords on the command
line for LOGON, AUTOLOG, and LIIK. The
intent is to force passwords to be typed
upon a
mask.
The new
support is
specified via
the SYSJRL
macro in
DMKSYS.
It is optional and must be
implemented at system generation time.
Privilege class A users can use the
JOURNAL operand of either the SET or
QUERY commands.
MULTIPLE ALTERNATE CONSOLE SUPPOBT
!~!:
program and Documentation
VM/370 supports 4331 and 4341 processors
offering compatibility with
the new
model IDs as well as the S/370 BAS
funciton subset.
MISCELLANEOUS
!~:
Documentation and Program
The following features and enhancements
are now supported by VM/370.
•
3203-5 Unit
•
Special Messages facility
•
Trace
Table
size
generation option
•
Modification
handling
•
3031 Alternate Processor
•
12 and 16 Megabyte Processors
•
Directory hooks
Program and Documentation
VM/370 supports the specification of
multiple alternate consoles at system
generation time.
MONITOB ENHANCEMENTS SUPPORT
of
as
a
Shared
system
Segment
Ne!: Program and Documentation
VM/370 supports the enhancement to the
Monitor module which permits the analyst
the option to specify periodic closing
Summary of Amendments
ix
Suamary of Aaendments
for SY20-0884-2
as updated by SN25-0461
VM/370 Release 5 PLC 12
VARY PROCESSOR SUPPORTED BY VM/370
!~!:
Documentation and Program Support
When a system h~s been generated for
attached processor operations, use of a
command,
VARY
PROCESSOR
new
ONLINE/OFFLINE,
facilitates
the
transition to or from uniprocessor mode
on the main processor. This command can
be used to vary a specified processor
offline or online without any serious
disruption to systea users.
x
IBM VM/370 Data Areas and Control Blocks Logic
summary of Amendments
for SY20-0884-2
as updated by SN25-0453
VM/370 Release 5 PLC 6
ALTERNATE TRACK FOR 3340/3344
NOW SUPPORTED BY VM/370
Mew: Documentation and Program Support
New code has been added for VM/370
support of 3340;3344 alternate track
facility~
These changes affected the
following modules:
IOBLOK
IOERBLOK
Summary of Amendments
xi
xii
IBM VM/370: Data Areas and Control Blocks Lcgic
"'IiI
.... t-i
\0
Ul~
~.
~
1'1
....
gUl
eUl
PSA (Prefix Storage Areal
(1)
ASYSVM
-I---
---
Ul (1)
r+~
n
CORTI\BLE
n
CORVM
CORFPNT
CORBPNT
I:I"~.
(1)0
1'11:1
I'd
(1)0
0
1:1
..... 0
PI 1:1
r+
r+r+
1'1
CORFPNT
0
.....
~'PI
o
CORBPNT
1:1"
.....
CORFPNT
~·OI
CORBPNT
0
~(1)
0
CORSWPNT
CORPGPNT
~
Ul Ul
---1---_
0
01'1
!XI
/-t)~.
(1)
.....
O~
r+
1:10
o
PI
0
1:1
Main 1/0 Link
Ul
I:J"
..... 0
t:f/-t)
.~
vc.U'WK. 8K.
~.
I'd
Ul
..... r+
01:1"
ECBLOK
~(1)
UlEl
en
PI
r+w.
(1)
0
r+
00
(1) 1'1
PIn
EXTCPTRQ
~.
0
1:1
001
r+~
n
~PI
It1
t::I
PI
S.HADOW
r+
PI
~
1'1
IT)
PI
Ul
PI
1 ___
n_"
IL--J
n
r+
1'1
0
.....
tJj
.....
NICBLOK
~
'J'
SHADOW
SEGTABLE
SEGPAGE
I
.
:::l
...Jr,
("')
."
C
HPI
1'1
Q)
PI
Q)
(1)
Ul
PI
1:1
OJ
0
0
1:1
ti·
H
0
1-'
b"
1-'
0
n
=""
rn
r+
»
...
CD
Q)
en
Q)
:::l
C.
("')
0
:::l
r+
...
•
2-
~
txJ
0
0
X"
~
n
O·
g.1'd
....
0
1:1
~.
r+1:I
~Ul
~.
01
•
Ul Ul
ttl
1:1
~
1:11:1
~.
Ul
\,Q
....
(D
,::::
H
0"
(')
"
en
ACCTBLOK, ACNTBLOK
lCCTBLOK provides header information
points to ACCTBLOK.
for spool files.
o
ACCTUSER
8
ACCTACNO
10
ACCTDIST
Field
Name
Hexadecimal
Displacement
0
8
10
The VMACCUBT field
in the VMELCK
Field Description, Contents, Meaning
ACCTUSER DS
ACCTACNO DS
ACCTDIST DS
CL8
CL8
CL8
ACCTLENG EQU
(*-ACCTBLOK)/8 Size of ACCTBLOK in doublevords (X'03')
Virtual machine identification
Virtual machine accounting number
Virtual machine distribution number
ACNTBLOK provides accounting and statistical information on each user that bas used
VM/370 facilities. The ARSPAC field in the Prefix Storage Area (PSA) Foints to the start
of the chain ef ACNTBLOKs.
o
ACNTCCW
ACNTNEXT
8
ACNTDATA
r
58
Hexadecimal
Displacement
------------
2
ACNTBACK
I
Field
Name
Field Description, Contents, Meaning
--------------------------------------
0
8
C
ACNTCCW DS
ACNTNEXT DS
ACNTDATA DS
D
F
CL80
Punch CCW fer accounting card
Address of next ACBTBLOK in chain
Accounting information (see "Fermat for Oser
Cards")
Address of previous ACNTBLCK in chain
5C
ACBTBACK DS
F
ACNTSIZE EQO
C*-ACBTBLOK) /8 Size of ACN'IBLOK in doublewcrds (X'OC')
IBM VM/370 Data Areas and Control Block Logic
ACNTBLOK
•
Format for User Cards
The fields below represent the 80 bytes defined by ACNTIATA in the ACNTBLCK data area.
ACNTUSER
8
10
ACNTOSER (cont.)
10
ACNTNOM (cont.)
20
ACNTNOM
ACNTSTOP
28
ACNTCONT
ACNTTIME
30
ACNTVTIM
ACNTPGRD
38
ACNTPGWT
ACNTIOCT
40
ACNTPNCH
ACNTLINS
48
I IIIIIII/IACNTR SV 111/11/1/11111
ACNTCRDS
50
--------------------------------------------------------1
III ACNTRSV1 (cont.)IIIIIIIIII/II/ACNTRSV2111/1111111111
58
III A*1
Hexadecimal
Displacement
-----------
IIIII ACNTCODE
Field
Name
Field Description,
Cont~=~s,
Meaning
C
14
1C
28
2C
30
ACNTOSER
ACNTNOM
ACNTSTOP
ACNTCONT
ACNTTIME
ACNTVTIM
ORG
DS
DS
DS
DS
DS
DS
ACNTDATA
CL8
CL8
CL12
1F
1F
1F
Virtual machine identification
virtual machine accounting number
Date and time of accounting MMDDYYHHSS
Number of seconds connected
Milliseconds of processor time used
Milliseconds of virtual processor time used
2C
30
ORG
ACNTDEVC DS
ANCTNCYL DS
ACNTTIME
XL4
1H
Device code (CTF!); see the DEVTYPE copy file
Number of cylinders of T-disk sFace
34
38
3C
40
44
48
4C
54
5A
ACNTPGRD
ACNTPGWT
ACNTIOCT
ACNTPNCH
ACNTLINS
ACNTCRDS
ACNTRSV1
ACNTRSV2
ACNTCODE
1F
1F
1F
1F
1F
1F
2F
XL6
1H
Total page reads
Total page writes
Virtual 510 count for nonsFooled 1/0
Virtual card count for spocled Funch
Virtual line count for spooled Frinter
Virtual card count for spooled reader
Reserved for IBM use
Reserved for IBM use
Accounting card identification code
£g!£
DS
DS
DS
DS
DS
DS
DS
DS
DS
£gg~§
DC
DC
DC
DC
fg! ACNTCODE
C'Co'C'x1'
C'x2'
C'x3'
User
User
User
User
formatted accounting card
virtual machine accounting card
dedicated device accounting card
temporary disk space accounting card
where:
X---C
x =0
if the card is initiated via a DIAGNOSE Code X'4C'
if the card is initiated via CP command Frocessing
Section 1. CP Data Areas and Control Blocks
3
ALOCBLOK
ALOCBLOK provides information on the temporary disk space availatle to a virtual machine.
The RDEVALLN field in the RDEVBLOK points to the ALOCELCK.
o
8
10
Hexadecimal
Displacement
o
4
6
8
ALOCPNT
ALOC8AI
i
1
------------------------------------------------------1
ALOCNTMP t//////////////////////////////////////////I
------------------------------------------------------1
ALOC!UP
1
Field
Name
Field Description, Contents, 8eaning
ALOCPNT
ALOCUSED
ALOCMAI
ALOCNTMP
DS
DS
DS
DS
DS
1F
18
18
18
38
Pointer to next lLOCELOK on chain
Number of nontemporary cylinders
Maximum number of cylinders available
Number of nontemporary cylinders
Reserved for IBM use
ALOCMAP
DS
OF
Cylinder allocation bit mat
A
10
ALOCUSED
Bits defined in ALOCMIP
(j-;;-cylinder is available
1 = Cylinder has been assigned
Note: The size of ALOCftAP is ~ariable and depends uton the number of
cylInders on the device. Generally. the size of the lLOCELCK is determined
by the following formula:
No. of Cylinder
(ALOCIUI+63)
ALOCSIZE(doublevords)
= -----------64
+ 2
= ------------------Bits per doublevord
+
vhe!~:
lLOCM11 for
for
for
for
for
for
for
for
for
for
for
for
2305-1
2305-2
2314
3330-1
3330-2
3330-11
3333-1
3333-11
3340-35
3340-70
3350
all others
=
=
=
=
=
=
=
=
=
=
48 cylinders
96 cylinders
203 cylinders
404 cylinders
404 cylinders
808 cylinders
404 cylinders
808 cylinders
349 cylinders
698 cylinders
555 cylinders
1 cylinder
Note that any bits in the map that represent cylinders nct present on
the device are set to 1.
4
6
ORG
ALOCCYL1 DS
ALOCCYL2 DS
ALOCUSED
1H
1H
First cylinder of T-disk area
Last cylinder of T-disk area
~I!~ g~!ined
!D !~OCMIP
X·OO· = Cylinder is available
4
IBM VM/370 Data Areas and Control Block Logic
header
lLCCBLOK
I'AA'
= Cylinder
has been allocated
Note: The size of the T-disk ALCCMAP is variable aDd depends upon the
nu.ber of cylinders in the range ALOCCYL1 to ALOCCYL2. Generally, the size
of a given block is determined by the following formula:
(ALOCCYL2-ALOCCYL1+1+7}
ALOCSIZE(doublevords)
= { ------------~---------
+2
=
+ header
{ ~~~~::-~:-:::~~~::~~~::~:~~:~--}
Bytes per doublevord
Note that bytes for cylinders that are not available are marked assigned.
Section 1. CF Data Areas and Centrol Elocks
5
BSCBLOK
ESCBLOK provides status, control information
buffers (necessary for polling and
addressing), and channel progra.s for 3270 re.ote equipment. The BDEVESC field in the
RDEVBLOK points to the BSCBLOK.
o
BSCSCCW1
8
BSCSCCW2
10
BSCSCCW3
18
BSCPCCW1
20
BSCPCCW2
28
BSCPCCW3
30
BSCPCCW4
38
BSCECCW1
40
BSCECCW2
48
BSCUECCW
50
BSCSEL
58
B*2 1 B*3
I
60 1
BSCINDEX
B*1
I//////////BSCRISVD///////////
I
BSCSPTR
BSCAUSER
1----------------------------------------------------BSCUCOPY
BSCRSTRT
1----------------------------------------------------1
BSCCNT
1 BSCSENSE
BSCRCVD
BSCSEND
1--------------------------------------------------1//////BSCUSER1///////////1
BSCRROBN
1----------------------------------------------------I
BSCTMRQ
BSCRESP
68 1
70
78
80
I------------------------------------~
88 I
6
BSCREAD
IBM VM/370 Data Areas and Control Block Logic
ESCELOK
Hexadecimal
Displacement
o
8
10
18
20
28
30
38
40
48
50
57
Field
Name
BSCSCCi1
BSCSCCi2
BSCSCCW3
BSCPCCi1
BSCPCCi2
BSCPCCi3
BSCPCCi4
BSCECCi1
BSCECCi2
BSCUECCi
BSCSEL
BSCFLAG
Field Description, Contents, !eaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1D
1D
1D
1D
1D
1D
1D
1D
1D
1D
7X
1X
B*1
§it§ g~!ined in BSCF1!G
BSCRVI
EQU -1-;80-;-BSCENQ
EQU
X'40'
BSCCOPY EQU
X'20'
BSCOPIED EQU
X'10'
BSCREGEN EQU
X'08'
BSCTSTRQ EQU
X'04'
BSCLOG
EQU
X'02'
BSCSCAN EQU
X'01'
58
BSCFLAG1 DS
~it§ g~!!~Q
BSCETB
BSCIGN
BSCPA 1
BSCINBID
BSCFORCE
BSCHALT
EQU
EQU
EQU
EQU
EQU
EQU
1X
B*2
BSCELOK flags
in BSCFLAG1
Station transmitted tlock record
Ignore block record
Indicator to call DMKCF!BK
Initial bid sequence required
User FORCE in progress
Halt I/O has been issued fcr this device
X'40'
X'20'
X'10'
X'08'
1'04'
BSCLINE DS
BSCINDEX DS
1X
1H
5C
60
BSCRESVD DS
BSCSPTR DS
4X
1F
64
68
6C
70
72
74
76
78
7C
80
84
86
BSCAUSER
BSCUCOPY
BSCRSTRT
BSCCNT
BSCSENSE
BSCRCVD
BSCSEND
BSCUSER 1
BSCRROBN
BSCTMRQ
BSCRESP
BSCREAD
1F
1F
1F
1H
1H
1H
1H
1F
1F
1F
1H
CL264
BSCSIZE1 EQU
BSCSIZE2 EQU
BSCSIZE EQU
Sending RVI response
Enqueued in data from station
COPY function is active
Initiate COpy function
Regeneration error
Ignore input precessing
Eypass FORC! message at logoff
Second scan for write request
-X'80-'--
59
5A
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
CCi for write reset operation
CCW for addressing or selection
CCli for read response to selection
CCli for write reset operation
CCli for general/specific polling
CCli for NOP command
CCli for read text
CCW for write error response
CCW to transfer control to read CCW
CCW for read response on time-out
Addressing/polling entry
ESCELOK flags
B*3
Line coordinate for input area
Index value for available space in inFut
buffer
Reserved for IBM use
Write CCi string address and/cr address of
buffer
Address of active resource
Address of COpy requestor's NICELOK
Address of restart CCli string
Retry count
Sense bytes from remote staticn
Expected received ACK (ACK-0/ACK-1)
Sending ACK (ACK-0/ACK-1)
Reserved for IB! use
Address of active user in queue
Pointer to TRQBLOK for poll delay
Response buffer for selecticn
Read buffer for polling
*- (ESCREAD+ 1)
Read buffer size in bytes
(BSCREAD-BSCBLOK) ESC header size in bytes
(*-ESCBLOK+7)/8 ESC blocksize in doublewords (X'19')
Secticn 1. CP Data Areas and Control Elocks
7
BUFFER
BUFFER is a buffer area that contains console inFut to te used by CP.
in the VCONCTRL block points to BOFFERM
o
BOFIN
BUFNXT
88
Bexadeciaal
Displacement
-----------0
88
8C
EUFCNT
Field
Naae
BUFIN
BUFNXT
BUFCNT
Field Description, Ccntents, !eaning
DS
DS
DS
CL136
1F
1F
Input line
Pointer to next byte in BUFFER
Count of characters in input line
Bits defined in BUFCNT
BUFINLTHEOU --L'BUffi'
BUFSIZE
8
The VCONREOF field
EOU
(*- BUFFER)
Size of input line in bytes (136)
/8
Size of console buffer in doublevords (X'12')
IBM VM/370 Data Areas and Control Block Logic
CCBREC
CCBREC provides statistical data for error recovery and/or error recording
previously Ferfor.ed channel operation that did not successfully complete.
o
i
C*1
1 C*2
I C*3
C*4
10
CCB!DL
CCCPUID
18
CCPROGID
20
FAILADD
30
FAILCCW
38
FAILCSW
CCBCUA
C*7
CCB!CEL
CCBCHCUA
CCBCLCGL
CCBLOG
50
Bexadecimal
Displacement
I/C*6//1
CCDIVTYP
FAILECSW
40
o
1///CCSW2REV//1 C*5
CCDATE
8
48
related to a
Field
Name
Field Description, Contents, !eaning
CCRECTIP
CCOPSIS
CCSW1
CCSW2
CCSW2REV
DS
DS
DS
DS
DS
1X
1X
1X
1X
2X
t:.
CCRECNT
DS
1!
7
8
10
14
CCRECNT1
CCDATE
CCCPUID
CCBMDL
DS
DS
DS
DS
1X
1D
1F
1B
16
CCB!CEL
DS
1B
18
20
30
38
40
CCPROGID
FAILADD
FAILCCW
FAILCSW
FAILECSW
DS
DS
DS
DS
DS
1D
SB
1D
1D
1F
Record type
Operating system
Switch 1
switch 2
Reserved for IB! use
Record count
Reserved for IB! use
Date and time
Processor identification
Processor model number (for example,
0158, 0168, etc.)
Maximum length of machine extended
logout area (model dependent)
User identification
Active I/O units
Failing CCW
Failing CSW
Failing ECSW
40
ORG FAILECSW
IGPRGFLG DS
CL1
Program flag bits
1
2
3
4
U
~it§ g~fined
CCBSIOB
CCBINTB
CCBTIO
CCBBIO
CCBSNSB
CCBCNTB
CCBNRIB
EQU
EQU
EQU
EQU
EQU
EQU
EQU
C*1
C*2
C*3
C*4
C*5
C*6
in IGPRGFLG
-X'SO'
X'40'
X'20'
X'10'
X'04'
X'02'
X'01'
Start I/O bit
Interrupt bit
Test I/O bit
Halt I/O bit
Sense data stored bit
count valid bit
No retry bit
Section 1. CP Data Areas and Centrol Elocks
9
~CHREC
Hexadecimal
Displacement
41
42
43
Field
Name
IGBLAME
Field Description, Contents, Meaning
DS
CL1
Probable source of error
Bits defined in IGBLAME
CCHCPU--EQU --X'8-0-'-CCHCHIL EOU
X'40'
CCHSCUB EOU
X'20'
CCHSTG
EOU
X'10'
CCHINTFC EOU
X'OS'
Processor is source of error
Channel is source of error
Storage control unit is source of error
Storage is source of error
Control unit is source of error
IGVALIDB DS
Validity indicator bits
CL1
J!it§ g~fi~g in IGVALIDB
CCHINTFV EOU -X'SO'
CCHRCV
X'10'
EOU
CCHUSV
X'OS'
EOU
CCHCMDV EOU
X'04'
CCHCAV
X'02'
EOU
CCHDAV
X'01'
EOU
Interface address valid
Sequence code valid
Unit status valid
Command address valid
Channel address valid
Device address valid
IGTERMSO DS
Termination/sequence code bits
CL1
J!it§ g~fi!led 1.n IG!ERMSg
COMPSYS EOU
X'CO'
COMPSEL EOU
X'SO'
COMPFES EOU
X'40'
CCHIOH
EOU
X'10'
COMPID
EOU
X'OO'
CCHDI
X'OS'
EOU
44
4S
49
4C
4E
50
50
50
50
54
54
10
syste. reset
Selective reset
stop, Stack, or nor.al termination
I/O interface inoperative
Interface disconnect
I/O et"ror alert
Seguence
RTCODEO
RTCODE1
RTCODE2
RTCODE3
RTCODE4
RTCODE5
RTCODE6
RTCODE7
Code Bits
EOO
X'OO'
X'01'
EOU
X'02'
EOU
X'03'
EOU
X'04'
EOU
X'05'
EOO
X'06'
EOU
EQU
X'07'
CCDEVTYP
CCHANID
CCHCUA
CCHCHCUA
CCHCLOGL
DS
DS
DS
DS
DS
1F
CL1
CL3
2X
2X
CCHSIZE
EOU
(*-CCHREC) /S
Size in doutlevords (X'OB')
CCHLOGSO
CCHLOG70
CCHLOG60
CCHADDR
DS
DS
DS
DS
OCL 112
OCL24
OCL24
1F
2SS0
2870
2S60
Unit
CCHSIZE1 EOU
(*-CCHREC)
Size in bytes for integrated channel
CCHLOG45 DS
CCHLOG35 DS
OCL96
OCL24
Model 145 integrated channEl (96 bytes)
Model 135 integrated channel (24 bytes)
Retry code values
for the constructed ECSW
C*7
CP dEvice type
Channel identification
Actual failing device address
Address fro. .achine location X'EA'
Length of channel logout
IBM VM/370 Data Areas and Control Block Logic
channel
channel
channel
address
- 112 bytes
- 24 1:ytes
- 24 tytes
stored 1:y integrated channel
CCPABl!
CCPABM provides control
information used for loading and
controlling the 370X
Communication Controller Network Control Program, Emulation Program, and Partitioned
Emulation Program and their attached resources.
o
CCPNAl!E
8
10
18
20
CCPADDB
CCPSIZE
CCPPSIZB
CCFENTBY
C*2
CCPHBFSZ
C*3
CCPHBFNO
28
Hexadecimal
Displacement
-----------0
8
2
10
14
18
C*5
C*6
I CCPMAXID
CCPBBSID
Field
Nalle
CCPNAME
CCPADDB
CCPSIZB
CCPPSIZB
CCPBNTBY
CCPTYPB
Field Description, Contents, l!eaning
DS
DS
DS
DS
DS
DS
Ct8
1F
1F
1F
1F
1X
CPNAl!E specified in NAl!ENCf macro
Origin of centrol program image
Control program size in bytes
Parameter list size in bytes
Control program entry point address
Control program type flag
C*1
Bits defined in CCPTYPE
CCPTNCP--EQU--X'O'-'CCPTBP
EQU
X'02'
CCPTPEP BQU
X'03'
19
1A
CCFSTOB
I/C*4//1
CCPCAONE DS
CCPCATiO DS
1X
;1
Network control program
270x emulation program
Partitioned emulation program
C*2
C*3
First channel adapter type flag
Second channel adapter tYPE flag
Bits defined in CCPAONB and CCPATiC
CCPTYPE1 BQU
X'01'
Channel adapter type 1
CCPTYPE2 BQU
X'02'
Channel adapter type 2
1B
1C
20
22
24
25
CCPBSV1
CCPSTOR
CCPHBFSZ
CCPHBFNO
CCPPADO
CCPPAD1
DS
DS
DS
DS
DS
DS
1X
1F
1H
1H
1X
1X
Beserved for IBl! use
370x storage size specified (in bytes)
Euffersize from HOST macre
Number of buffers in read list
First buffer pad count (in bytes)
Subsequent kuffer pad count
C*4
C*5
C*6
BI
CCPVPAD1 EQU
34
~]2rt for 370x
34-tyte pad in first bisynchrenous
transmitter buffer
34-byte pad in subsequent buffers
26
28
CCPIUXID DS
CCPRBSID DS
1H
1F
Highest resource ID defined
Besource ID definition
28
29
2A
ORG
CCPRSTYP DS
CCPRSTAT DS
CCPRSTEP DS
CCPBBSID
1X
1X
1H
Definition kreakdown
Resource type flag
Resource initial status flags
Subchannel address wben in EF mode
HOSl !glyes ~~gui!~Q
CCPVPADO BQU
34
!J!L370
Section 1. CP Data Areas and Centrol Blocks
11
CBXBLOK,CBYBLOK
CBXBLOK and CBYBLOK provide the necessary control for a virtual machine using a virtual
channel-to-channel adapter (CTCA). The VDEVBEAL field in the VDEVBLCK points to CBIELOK
and CBYBLOK fer virtual CTCAs.
0
8
CBXOTBB
X*l
CBYOTBR
X*2 , X*3 I X*4
Y*l
I Y*2
10
CBXNCCW
CBYNCCli
18
CBIBCNT
CHYRCNT
20
CBXSTAT
CBXYADD
CBYSTAT
28
CBXIDAW
CBYIDAli
30
CBXCNCT
CHYCNCT
38
CHXDATN
CHYDATN
Y*3
Y*4
CBYXIDD
lote: As indicated in the illustrated block, the CBIBLOK and CHYELCK are interleaved
with a 4-byte displacement. The X-side VDEVELOK points to the +0 slot, the Y-side
VDEVBLOK points to the +4 slot; however, once the virtual connection is made, either side
can be the X-side or the Y-side since this interleaved arrangement makes the contrel
block references completely symmetrical. The dual DSICT definition allows the active
adapter (defined to be the I-side, arbitrarily) to reference beth adapter sides
concurrently wi-thout knowing whether i t i s at +0 or +4.
Bexadecimal
tisplacement
o
8
Field
Name
Field Description, Contents, Meaning
CBXBLOK
I-side channel adapter block
CBXOTBB
CBXFLAG
DS
DS
~it§ g~!!~g
9
A
CBBl!NOP
CBBM370
CHBATTN
CBBREST
CBBEOFL
CBBBIO
CBBWAIT
CBBCENT
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
CBXCMDB
CBXCMDT
DS
DS
~!!§ g~!!~g
CBBCTNL
CBBRDBK
CBBWEOF
CBBSCMD
CBBSADS
CBBREAD
CBBWRIT
12
EQU
EQU
EQU
EQU
EQU
EQU
EQU
2F
lX
X*l
Vl!ELCK address of Y-side adapter user
Internal processing flags
in CBIFLIG
-X'80'-
Modified NOF command issued (also in CMDT)
CTCA operating in Systea/370 mede
Attention pending from Y-side
CTCA has been reset I-side and Y-side
Force EOF to next READ instruction
Halt I/O or halt device issued
CPEXELOK available--for channel reconnect
Channel end has b.~n preserved en SIO
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'Ol'
lX
lX
X*2
X*3
Active CCW command byte buffer
Active CCli command type (Rt, WB, etc.)
in CBICMDT
-X'40'X'20'
X'10'
X'08'
X'04'
X'02'
X'Ol'
Control, other than NOP
Read backward
Write EOF
Sense command byte
Sense adapter status
Bead
write
IBM VM/370 Data Areas and Control Block Logic
CBXBLOK,CBYELCK
Hexadecimal
Displacement
-----------B
C
10
18
20
22
24
28
30
38
Field
Name
. Field Description, Contents, eeaning
CBXIDAW
CBXCNCT
CBXDATN
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1X
4X
2F
2F
1B
1B
2B
2F
2F
2F
CBBSIZE
EQU
(*-CBXBLOK)/8
CHXPKEY
CHXNCCW
CHIRCNT
CBXSTAT
CHXYADD
X*4
CBYBLOK
o
8
CBYOTBR
CBYFLAG
9
DS
DS
CBBMNOP
CBBM370
CBBATTN
CBBREST
CBBEOFL
CBBBIO
CBBWAIT
CBBEENT
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
CHYCMDB
CBYCMDT
DS
DS
2F
1X
Y*1
Modified NOF command issued (also in CMDT)
CTCA operating in System/370 mode
Attention pending from X-side
CTCA has been reset X-side and Y-side
Force EOF to next READ instruction
Halt 1/0 or halt device issued
CPEXELOK availatle for channel reconnect
Channel end has been preserved cn SIO
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
1X
1X
Y*2
Y*3
-x''4o'-
B
CHYPKEY
10
18
20
22
24
28
30
38
CHYNCCW
CBYRCNT
CBYSTAT
CHYXADD
CBYIDAW
CBYCNCT
CBYDATN
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
VMELCK address of X-side adaFter user
Internal processing flags
in CBYFLAG
--X'SO'-
Bit§ Q~!!!!ed in CBYCMDT
CBBCNTL EQU
CBBRDBK EQU
X'20'
CBBWEOF EQU
X'10'
CBBSCMD EQU
X'08'
CHBS!DS EQU
X'04'
X'02'
CBBREAD EQU
CBBWRIT EQU
X'01'
C
Total block size in doublewords (X'08')
Y-side channel adapter block
~it§ Q~!!~Q
A
Virtual CAW protection key
"Other" adapter control flags
Next CCW fetch address (real)
Remaining CCW data count
tevice status accumulation field
Virtual address of Y-side adaFter
"Other" adaFter control flags
Active indirect data list word
CPEXELOK for channel reconnect
IOELCK address for deferred I/O interruFt
1X
4X
2F
2F
1B
1B
2B
2F
2F
2F
Active CCW command tyte buffer
Active CCW command type (Rt, WB, etc.)
Control, other than NOP
Read tackward
Write EOF
Sense command byte
Sense adapter status
Bead
write
Y*4
Virtual CAW protection key
"Other" adapter control flags
Next CCW fetch address (real)
Bemaining CCW data count
Device status accumulation field
Virtual address of X-side adaFter
"Other" adaFter control flags
Active indirect data list word
CPEXELOK for channel reconnect
IOELCK address for deferred I/O interruFt
Section 1. CP Data Areas and Centrol Blocks
13
CKPBLOK
CKPBLOK provides checkpoint information needed for VM/370 warm start recovery for
3704/3705 Communication Controllers and enabled lines and resources. Tbe RDEVCKPT field
of the RDEVBLOK points to CKPBLOK.
o
a
10
Hexadecimal
Displacellent
-----------0
2
4
8
10
I
CKPSIZE
1//////////CKPRSV1//////////1
--------------------------------------------------------1
CKPNAME
1
------------------------------------------------------1
CKPBITS
I
Field
Nalle
CKPSIZE
CKPRMAX
CKPRSV1
CKPNAME
CKPBITS
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
CKPBKSZ EQU
14
CKPRMAX
1H
18
1F
CLa
OD
Size of checkpoint block in dcublewords
Number of resources checkpcinted
Reserved for IBM use
370x control program reference nalle
Bit map of enabled lines or rescurces
(CKPBITS-CKPBLOK)/a Header size in doublewcrds
IBM VM/370 Data Areas and Control Block Logic
CONTASK
CONTASK contains data and control information pertinent to the control and communication
between virtual and real terminal console tasks and command streams.
The RDEVCON field
of the RDEVBLOK and the NICQPNT field of the NICELOK point to CONTASK.
0
8
CONRE'lN
CONPNT
CONUSER
C*1 I C*2 I CONTSKSZ
10
CONCCW1
18
CONCCW2
20
CONCCW3
28
CONCCW4
30
CONDATA
(Variable Length)
Hexadecimal
Displacement
o
4
8
Field
Name
CONPNT
CONRETN
CONSTAT
Field Description, Contents, Meaning
DS
DS
DS
1F
1F
1X
C*1
liit§ ~~fi!!~~ in CONSTAT
-X'80'--
Pointer to next CONTASK
Pointer to SAVEAREA for return
CONTASK status control flags
Generate CONTASK output
Respcnse expected from this CCNTASK
CONTASK is active on real device
This is a centrol CONTASK cnly
CONTASK contains device deFendent data
Retry operation in progress
Output data being split via RDEVLLEN
CONTASK for synchronization enly
CONOUTPT
CONRESP
CONACTV
CONCNTL
CONESCP
CONRTRY
CONSPLT
CON SYNC
EQU
EQO
EQO
EQO
EQO
BQU
EQO
EQO
9
CONPARM
DS
11
A
C
CONTSKSZ DS
CONOSER DS
CONCCi1 DS
1H
1F
1D
DMKQCN parameter flags (see "APFendix A.
CP and RSCS Equate Symbels")
CONTASK size in doublewords
Address of VMBLOK for destination user
First console I/O CCll
16
CONADDR
CONFLAG
CONDiC
CONCNT
ORG
DS
DS
DS
DS
CONCCi1
1F
1X
1X
1H
CCi data
CCi flag
DIAGNOSE
CCll t:yte
10
ORG
CONCOMND DS
CONADDR
1X
CCi command code
18
20
28
30
CONCCi2
CONCCi3
CONCCW4
CONDATA
1D
1D
1D
OC
Second console I/O CCll
Third console I/O CCli
Fourth console i/O CCll
Output data area (variable length)
(*-CONTASK)/8
CONTASK size in doublewords
10
10
14
15
DS
DS
DS
DS
CONTSIZE EQU
X'40'
X'20'
X'10'
X'08'
X'02'
X'01'
C*2
address
bits
write control
count
Section 1. CP Data Areas and Centrol Blocks
15
CONTASK
Hexadeci.al
Displace.ent
Field
Name
!!.i:!.§
2A
2C
2E
30
31
32
34
35
36
31
33
33
34
35
36
16
~defill!i!g
CONSRID
CONDEST
CONRTAG
CONSISR
CONEXTR
CONTCMD
CONFUNC
CONDFLG
CONDCNT
§.i:!.§
30
Field Description, Contents, 8eaning
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
!!i!g!i!fi~g
ORG
CON LABEL DS
DS
CONSTX
CON ESC
DS
CONCMD
DS
CONiCC
DS
CONSBA
DS
DS
in CONCCi fo! J10x Network Control Progra.
CONCCW3+2
1H
Source identifier
1H
Destination resource ID
1H
Request tag for this CONTA5K
1X
370x system response byte
11
370x extended response byte
1H
Eisynchronous terminal co •• and modifier
11
Easic device function contrel flags
11
Easic device data control flags
1H
Text data length
fo! 3270
CONCCi4
1x
11
11
1X
11
11
1H
Return index value
Start text character
Esca~e character
Command code for remote station
Write control character
Start buffer address
Euffer address
IBM VM/370 Data Areas and Control Block Logic
CORTAELE
CORTABLE maintains the status and ownership of each page frame of real sterage for use by
page management routines. The ACOBETBL field of the PSI points to CORTAELE.
o
8
Displacement
o
C*1
CORFPNT
COREPNT
CORSWPNT
CORPGPNT
Field
Name
CORFPNT
Field Description, Contents,
DS
1F
En!!!, gefini!ion !2! Rgg~
ORG
CORFPNT
CORVM
DS
1F
C
CORBPNT DS
CORSWPNT DS
CORPGPNT DS
8
COR FLAG
4
6
ORG
DS
~eanin9
Pointer to next CORTABLE entry in queue
Q~!shiE
Pointer to VMBLOK of page ewner
1F
1F
1F
Pointer to Frevious CORTAELE entry in queue
Pointer to SWPTABLE for Fage
Pointer to PAGTAELE for page
CORSWPNT
11
C*1
CORTAELE entry status flags
~i!§
defined in CORFLAG
CORIOLCK EQU --X'80-'-
CORCFLCK
CORFLUSB
COR FREE
CORSBARE
CORRSV
CORCP
CORDISA
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
Page locked for IIC or CORLCNT is
greater than 0
Page locked by console functien
Page is in FLUSH list
Page is in FREE list
Page is shared
Page is reserved
Page belongs to the control Frogram
Page disatled, not available
~nt!! ~~!initi~.!l
4
CORLCNT
ORG
DS
i! gage Is Locked
CORBPNT
1F
Page lock count for CORIOLCK
i! Rage !§ in Tran§it
CORFLAG
1X
C*1 DASD operation code for
~nt!I ~~!initi.Q.!l
8
CORCODE
ORG
DS
D~KPAGIO
Section 1. CP Data Areas and Centrol Blocks
17
CPEXBLOK
CPEXBLOK maintains register values and addressing infor.ation (module address or entry
point address) to handle a delayed transfer of centrol. Stacked CPEXELCKs are queued off
DMKDSPRQ.
o
CPEXFPNT
CPIXBPNT
8
CPEXMISC
CPIXADD
10
Hexadecimal
Displacement
-----------0
4
8
CPEXREGS
Field
Nalle
Field Description, contents, !eaning
CPEXFPNT DS
CPEXBPNT DS
CPEXMISC DS
1F
1F
1F
Pointer to next CPEXBLCK
Pointer to previous CPEXBLCK
Use varies with stacker
Defin!!!2] !~ DM!~TK and DMKDSP
ORG
CPEXMISC
CPEXTYPE DS
1X
Type of block on CPEXBLOK chain
in CPEITYPE
CP_RXDEFR _EQU -X'80'
CPEXPRIO EQU
X'40'
CPEXLPSi EQU
X'20'
DS
1X
CPEXPROC DS
18
~!!§ g~fi~g
C
10
CPEXADD DS
CPEXREGS DS
!2!
10
14
18
1C
20
24
28
2C
30
34
38
3C
40
44
48
4C
Return address
Execute registers
£~~XR~~~ !!~g
CPEXRO
CPEXR1
CPEXR2
CPEXR3
CPEXR4
CPEXR5
CPEXR6
CPEXR7
CPEXR8
CPEXR9
CPEXR10
CPEXR11
CPEIR12
CPEXR13
CPEIR14
CPEIR15
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
CPEXSIZE EQU
18
IF
16F
Deferred interrupt request
CPEXELOK with priority
Load PSi to go to execution address
Reserved for IBM use
Address of processor related to block
CPEXREGS
1F
IF
1F
1F
IF
1F
IF
1F
IF
1F
IF
1F
1F
1F
IF
1F
Registers 0 through 15
(*-CPEXBLOK)/8 Size in doutlewords (X'OA')
IBM VM/370 Data Areas and Control Block Logic
tDRREC
DDRREC is used in the SVC 76-initiated error recording process for tYFe 60 tlSD dumF
restore (DDR) dynamic device reallocation records~
The reallocation recerds contain the
replacement of the virtual "FROM" and "TO" control unit addresses (CUI) by the real
addresses of the real DlSD devices.
0
DDRKEYB
DtBTftEB
DDRDTEB
8
10
DDRCPlD
is
nnll"lnl:l
IJU.a.'Uv~
tDRVCL2
20
DDRVOL1
28
DDRVOL2 (cont.)
ID*5
tDRCU11
30
DDRDEV1
ID*6
tDRCU12
38
DDRDEV2
Hexadecimal
Displacement
-----------0
2
3
4
5
6
8
C
10
I
I D*1 I/D*2/I/D*3/I/t*4/1//tDRSPE1////////1
Field
Balle
DDRKEYB
DDRSWS1
DDRSWS2
DDRSWS3
DDRRECBT
DDRSPE1
DDRDTEB
DDRTftEB
DDRCPlD
Field Description, Contents, Beaning
DS
DD
DS
DS
DS
DS
DS
DS
DS
1H
1C
1C
1C
1C
1H
1F
1F
2F
D*1
D*2
D*3
D*4
Type and operating system
Switch byte
Reserved f~r lBB use
Reserved for IBM use
Reserved for lBB use
Reserved for lBB use
Date'
Time
Processor identification and model number
R~ice
18
20
26
2C
2D
30
34
35
38
Dependn! Rgta
81
DDRJOB
DS
61
DDRVOL1 DS
DDRVOL2 DS
61
11
DDRDEVP1 DS
DDRCU11 DS
31
DDRDEV1 DS
41
11
DDRDEVP2 DS
DDRCUA2 DS
31
DDRDEV2 DS
41
DDRSlZE
EQU
D*5
D*6
(*-DDRREC)
Job using FROft device
Voluae serial FROB device
Voluae serial TO device
Device identification of FRCB DlSD
Primary CUI of FROB device
Device type FROB de~ice
Device identification TO DASD
Primary CUI of TO device
Device type of TO device
DDR record size
Section 1. CP Data Areas and Centrol Blocks
19
DMPINREC
DMPINREC retains vital system register and
CPDUMP file. See also DMPKYREC.
o
DMPCRS
80
DMPFPRS
AO
DMPTODCK
A8
DMPCPUTft
BO
DMPCKCOft
S*1
I/S*2//1
DMPLCORE
1CO
DlJPPRFRG
o
AO
A8
BO
B8
nf!PABEND
DMPPGfUP
lC8
40
80
for the
DlJPSYSRV
DlJPPROCA 1
co
Bexadeciaal
Displacement
values necessary
DMPGPRS
40
B8
stcrage location
Field
Naae
Field Description, Contents, f!eaning
DMPGPRS
DMPCRS
DMPFPRS
DS
DS
DS
16F
4D
DMPTODCK
DMPCPUTM
DMPCKCOM
DMPFLAG
DS
DS
DS
DS
lD
1D
1D
1X
l6F
S*1
16 general registers
16 control registers
Pour floating-point registers
(if floating-Foint feature is installed on
machine)
Time-of-day clock
Processor tiaer
Tiae-of-day clock coaparatcr
Flag byte
Bits defined in DMPFLAG
HiLFPiG~EQU
B9
BA
BC
CO
1CO
1C4
1C8
20
DMPRSV1
DMPPROCA
DMPSYSRV
DMPLCORE
DMPPRFRG
DftPABEND
DMPPGMAP
DS
DS
DS
DS
DS
DS
DS
--X'80'--1X
1H
1F
256X
1F
1F
4096B
When on, last record in DU!P file is 2K
S*2
Reserved for IB! use
Abending processor address
System generated storage size
Absolute storage locations 0 through 255
Prefix register
Abend code for failing processor
Eit aap indicating Which pages aFpear in the
DU!P file (each tit represents a 4K block)
IBM VM/370 Data Areas and Control Block Logic
DMFKYREC, DMPTBREC
DMPKYREC contains the storage keys of each 2K block of main storage at the time of SVC 0
or a PSi restart condition. DMPKYREC and DMPINR!C are used for debugging operations.
I
I S*1
o 1---..1
DMPKEYS (4096 bytes)
Field
Nalle
Hexadecimal
Displacement
------------
Field Description, contents, Meaning
0
DMPKEYS
DS
4096X
0
DMPKEY
eRG
DS
DMPKEYS
1X
Main storage keys
S*1
Storage key for each 2K block
DMPTBREC is a listing of all entry points in the system and their locations.
o
DMPSYMNM
DMPSYMVA
8
10
Hexadecimal
Displacement
DMPSYMEN
Field
Name
Field Description, Contents, Meaning
C
DMPSYMEN DS
341XL12
Symbol table entries
0
8
eRG
DMPSYMNM DS
DMPSYMVA DS
DMPSYMEN
CL8
A
CSECT or entry point name
Location in main storage of this symbol
Section 1. CP Data Areas and centrol Blocks
21
ECBLOK
ECBLOK provides an extension to the VMELOK for virtual machine operaticn
extended control mode. The VMECEIT field of the VMBLOK points to ECELCK.
o
EITCRO
EITCR1
8
EITCR2
EITCR3
10
EITCR4
lI'ICR5
18
EITCR6
EI 'lCR1
20
EITCR8
EI'ICR9
28
EITCR10
lITCR11
30
EITCR12
EI'ICR13
38
EITCR14
ll'ICR15
40
EXTSHCRO
EI'ISHCR1
48
EITSHLER I EITVSEGS
EI'lSTOLD
50
EITSHSEG
EI'ISlGLR
EI'IARCH
58
EXTPERAD
EITPERCD
EITCOPY
60
in syste./310
EITCPTftR
68
EITCPTRC
EI'ICCTRQ
Hexadecimal
Displacement
Field
Naae
o
EXTCRO
DS
1F
4
EITCR1
DS
1F
Virtual control register 0; architecture
controls
Virtual control register 1; segment table
pointer
8
EITCR2
EXTCR3
EXTCR4
EITCR5
EXTCR6
EITCR1
EXTCR8
EXTCR9
EXTCR10
EXTCR11
EXTCR12
EXTCR13
EXTCR14
EXTCR15
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
Virtual control registers 2 thrcugh 15
C
10
14
18
1C
20
24
28
2C
30
34
38
3C
22
Field Description, Contents, Beaning
IBB VM/310 Data Areas and Control Block Logic
ECELOK
Eexadecimal
Displacement
40
44
48
4A
4C
50
54
56
58
5C
5E
60
68
6C
Field
Name
EXTSHCRO
EXTSHCRl
EXTSHLEN
EXTVSEGS
EXTSTOLD
Field Description, Contents, Meaning
DS
DS
IF
IF
DS
DS
DS
lH
1H
EITSHSEG
EITSEGLN
EXTARCH
EITPERAD
EITPERCD
EITCOPY
EITCPTMR
EITCPTRQ
EXTCCTRQ
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
lH
lH
EITSIZE
EQO
Shadcw control register 0
Shadow control register 1
Length of shadow SEGTAELE in bytes
Length of virtual SEGT!BLE in bytes
Control register 1 value ccrresFcnding tc
tatles
Real address of shadow SEGTAELE
Length of shadow SEGTAELE in doublewords
Architecture control index
Address of instruction PIR interrupt
PER code to be reflected
Length code from active SEGTAELE entry
Virtual processor timer
Address of TRQBLOK for processor timer
Address of TRQBLOK for clock comFarator
IF
IF
1H
1H
1D
IF
IF
(*- ECBLOK)
/8
ECELCK size in doutlevords (I'OE')
Secticn 1. CP Data Areas and Control Elocks
23
ERRBLOK
ERRBLOK contains data describing an error condition such as a channel failure or a device
failure.
I
o
ERR KEY
I/E*1//I//////////ERRRSV2////////////1
ERRDATE
ERRTIME
8
10
ERRCCW
18
20
ERRPARl'I
30
ERRIOB
70
ERRIOER
Hexadecimal
Displacement
o
Field
Na.e
I E*2 I E*3
Field Description, Contents, !eaning
1F
1F
1F
Key used to determine OBR/!DR precessing
Reserved for IB! use
Reserved for IB! use
Time record vas built
Date record vas built
ERRHEADR EQU
(*-ERRBLOK)
Size of header in bytes
10
ERRCCW
1D
Failing CCW
10
ORG
ERR!UOB DS
ERRMIOER DS
ERRCCW
(IOBSIZE) D
(IOBRSIZE) D
Copied IOBLeK
Copied IOERELOK
10
10
ERRCCNT
ERRCONT
ORG
DS
DS
ERRCCW
21
OC
Size of CONTASK data buffer
CONTASK data buffer (variable length)
18
1E
1F
20
30
70
ERRVOLID
ERRSDR
ERRCORR
ERRPARM
ERRIOB
ERRIOER
DS
DS
DS
DS
DS
DS
61
2D
(IOBSIZE) D
(IOERSIZE) D
Volid of failing device
SDRILAGS from SDRBLOK
Correlation count for !DR record
Device dependent parameter string
Copied IOELCK, see ICBLOK fer details
Copied IOERELCK, see IOERBLCK fer details
ERR SIZE
EQU
(*-ERRSIZE)/8
ERRELOK size in doublewords
3
4
8
C
24
ERRVOLID
ERRKEY
ERRSV1
ERRRSV2
ERRTIME
ERRDATE
DS
DS
DS
DS
DS
DS
31
11
11
11
E*1
E*2
E*3
IBM VM/370 Data Areas and Control Block Logic
IOBLOK
IOBLOK contains information required to perform I/O operations.
The I/O request
initiator fer the I/O operation is either a CF-initiated or virtual machine-initiated
event. There are five pointers to the IOBLOK: RCHFICB field of the BCHELOK, RCHFIOE
field of the RCUBLOK, RDEVAIOB field of the Rt!VBLOK, VDEVFIOB field cf the VDEVBLOK,
RDEVFIOB field of the RDEVBLOK.
0
r
IOBRADD
IOEEPNT
IOBFPNT
8
10
IOBCYL
IOBMI5C
IOBVADD
18
IOBUSER
IOBIRI
20
IOBCAW
IOERCIW
IOBCSW
28
30
38
Hexadecimal
Displacement
-----------0
2
IOBLINK
11* 1 11*2
IOBMI5C2
IOBIOER
1*3
1*4
1//IOBRSV2//I//////////1OBR5V3////////////
Field
Name
IOBRADD
lOB FLAG
Field Description, Contents, Meaning
DS
DS
1B
1X
1*1
Bit§ g~fi!!~g in IOBFLAG
IOBCP
EQO -X'8o.IOBRSTRT EQO
X'40'
IOBSPLT EQO
X'20'
EQO
IOBPAG
X'10'
IOBRELCU EQU
X'08 i
IOBERP
EQO
X'04'
IOBRES
EQO
X'02'
EQO
IOBBVC
X'01'
3
IOBSTAT
DS
1X
~it§ g~!!!!~g
in IOBSTAT
IOBFATAL EQU --X'80-'-IOBFLT
EQU
X'40'
IOBPATBF EQU
lOB MINI EQO
IOBALTSK EQU
X'20'
X'08'
X'04'
EQU
EQU
EQO
EQO
X'03'
X'02'
X'01'
X'OO'
IOBCC3
1OBCC2
IOBCC1
IOBCCO
Real device address for SIC
IOBLCK flags
CP-generated I/O operation
Restarted oFeration - IOBRCAW
DISC - CP split seek operation
IOBLCK created for paging I/O
Control unit released at initiation
I/O task is under control cf ERP
I/O task has been reset
I/O initiated via DIAGNOSE instruction
1*2
IOBLCK status
Unrecoverable error in this I/O operaticn
IOELOK queued pending completion of a MSS
cylinder fault
Path is fixed, use IOBRADD value
This is a mini-IOBLOK
DASt channel program has seek tc alternate
track
processing CC 3, not available
processing CC 2, channel busy
processing CC 1, csw stored
processing I/O interrupt
Section 1. CP Data Areas and Centrel Blocks
25
IOBLOK
Hexadecimal
Displacement
-----------4
8
C
10
12
14
18
1C
20
24
28
30
34
38
Field
Name
IOBLINK
IOBFPNT
IOEBPNT
Field Description, Contents, Meaning
1F
1F
1F
Pointer for multipath IOELCK chain
Pointer to next IOBLOK in queue
Pointer to previous IOBLOK in queue
IOBMSIZE EOO
(*-IOBLOK) /8
Multiple path IOBLOK size in dcublewcrds
(X'02')
IOBCYL
IOBVADD
IOBMISC
IOBOSER
IOBIRA
IOBCli
IOBRCAi
IOBCSi
IOBIOER
IOBMISC2
lOB SPEC
1H
1H
1F
1F
1F
1F
1F
1D
1F
1F
1X
DASt - seek cylinder for tbis ICELOK
Virtual device address
Ose varies according to caller
Pointer to VMBLCK of user
IOELCK interrupt return address
Pointer to CCIl chain
Pointer to restart CCIl chain
Real CSIl for I/O operation
Pointer to IOERBLOK with sense byte
Ose varies according to caller
IOELCK special requests flag
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1*3
Bit§ def!~Q in IOBSPEC
IOBTIO
EOO --X'80-'IOBBIO
EQO
X'40'
IOBSIOF EQO
X'20'
IOBIMSTK EQO
X'10'
IOBONSL EOO
X'08'
IOBCOPY EQO
X'04'
IOBSENS EQO
X'02'
IOBTRPND EOO
X'01'
39
IOBSPBC2
DS
1X
IOELCK request for a TIO
IOBLCK request for a HIO
Virtual SIO fast release
Shut down StR function
IOELCK resulting fro. unsolicited interrupt
I/O block associated with a COpy request
Sense operation for COpy request
Virtual trace pending on tbis I/O block
I-*4
IOB-LOK spe-cial req-uests flag-secoDdbyte
~it§ Q~fi~Q
in IOESPEC2
IOBiRIP EQO --X'80-'- IOBCLN
EOO
X'40'
IOBONREL EQO
X'20'
31
3C
IOBOC
EQO
IOBSNSIO EOO
IOBREL
EQO
X'10'
X'08'
X'04'
Input/output task for AOTOPCLL wrap list
VDEVELOK locked when CCIl gct control
Input/output task contains release, DMKONT
must process
Onit check status
Nor.al sense operation in Frogress
Channel program contains CP release
IOBRSV2
IOBRSV3
1B
1F
Reserved for IBM use
Reserved for IBM use
IOBSIZE
26
EOO
(*-IOBLOK)/8
IOELOK size in doublewords (X'OS')
fE
IOBLOK§
ORG
IOBVADD
1H
IOBRCNT DS
1.Q£
12
DS
DS
Retry count
IBM VM/370 Data Areas and Control Block Logic
IOERELCK
IOERELOK contains information related to I/O and channel errors. This entails error
retry, operator .essage information, and SDR (Statistical Data Recording) IOERELOK
related to I/O equipment. There are three Fointers to the ICERBLCK: RDEVIOER field of
the RDEVBLOK, VDEYIOER field of the VDEVBLOK, IOEIOER field of the ICBLCK.
0
ICERLCC
IOERPNT
8
IOERftSG
IOERDW
1*1
10
IOERADR
18
IOERCSli
20
IOERCCli
28
IOEREIT
IOERCCB
30
I 1*4
! 1*2
! 1*3
!/////IOERSV1///////
IOERDATA
50
Additional Sense Data Area
-- or -XOBR3211 Extension
-- or --
Channel Check Reflection Extension
Bexadeci.al
Displacement
------------
Field
Name
Field Description, Contents, Meaning
0
4
8
IOERPNT
IOERLOC
IOERDW
DS
DS
DS
1F
1F
1B
A
IOERftSG
DS
IL3
A
ORG
rOERNUft DS
IOERIND3 DS
B
§i!§
g~fined
IOERIGN
IOERETRY
IOERCAN
IOEREC
IOERDlSD
IOERDEC
IOERIIFO
IOERICT
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
IOERMSG
1X
11
in IOERIND3
1'80'
X'40'
X'20'
X'10'
X'08'
1'04'
X'02'
X'01'
Pointer to next IOERBLOK
Address of CClis used in recovery
Size (in doublewords) of storage needed to
construct CClis
Communications with error recording
processor and message writer
Ereakdown for DMKftSW
Message nuater for message routine
Indicators for message routine
Allow IGNORE response
Allow RETRY response
Allow CANCEL response
Error occurred during recovery action
Home address is present
Operator decisien is necessary
Infermational message
Operator action is required
Section 1. CP Data Areas and Centrel Blocks
27
IOERELOK
Hexadecimal
Displacement
C
Field
Name
Field Description, Contents, Meaning
IOERIND4 DS
1X
Indicators for message writer
~j!~
de!!ned in IOERIND4
IOERIGNR EQU --X'80.---IOERSTRT EQU
X'40'
IOERCNCL EQU
X'20'
D
IOERFLG1 DS
1X
Operator responded "ignore"
Operator responded "retry"
Operator responded "cancel"
1*1
Bits defined in IOERFLG1
IOERPENDEQU --X'80-'-IOERCLN
IOERERP
IOERFSR
IOERDEPD
IOERBSR
IOERDERD
IOERERG
IOERXERP
IOERORA
IOERSUPP
IOERVLD
E
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
IOERFLG2 DS
Bit~ de!!~g
IOERSTAT EQU
IO"E1UU- "EQU
IOERCAL EQU
IOERECF EQU
IOERRBK EQU
IOERREW EQU
IOERCYLR EQU
IOERMSW EQU
IOERCEMD EQU
IOERVOL1 EQU
DS
DS
DS
DS
1*2
in IOERFLG2
--x'ao.--X'20'
X'10'
X'10'
X'08'
X'04'
X'04'
X'02'
X'01'
IOERWRK
IOERADR
IOERCSW
IOERCCW
1X
1D
1D
1D
20
26
ORG
IOERVSER DS
IOERLEN DS
IOERCCW
CL6
1H
2C
IOERFLG3 DS
1X
Second flag byte for error recovery program
use
Statistical data being unleaded
last h-ow"e -address being rea d
Standalone recalibrate being executed
Error correction function
Read backward cemmand
Tape rewind being executed
Cylinder (in sense byte) has been relocated
Message writer is active
Intensive recording mode
DASt volid teing read
X-'40'
10
18
20
F
pending device end interru~t from interrupt
request
Tape cleaning in progress
Spooling - error routine in centrol
Forward space record being executed
Spooling - waiting for device end
Eackspace record being executed
Spooling - device end received
Erase gap command in progress
Spooling - error routine getting OBR data
Opposite recovery action in ~rogress
CCW has suppress data transfer bit on
Read opposite recovery successful
X'40'
X'40'
X'20'
X'20'
X'10'
X'10'
X'08'
X'08'
X'04'
X'02'
X'01'
1X
Flag byte for error recovery routines
1*3
Miscellaneous work byte
Home address for DISD devices
CSW associated with error
Sense CCW used to sense the real device
Ereakdown of sense CCW field
Volume serial number for statistical data
Nuaber of sense bytes present
1*4
Third flag byte for SDR use
~it~ g~!!~~g
28
in IOERFLG3
IOERREAD EQU --X'80'-IOERALTR EQU
X'40'
IOERRDRO EQU
X'20'
SDR READ operation flag
Alternate track retry is in progress
Read home address, read only is in progress
2D
IOERSV1
XL3
Reserved for IBM use
30
30
IOERSNSZ EQU
IOERDATA DS
321
(IERSNSZ/8) D
Number of sense bytes su~ported
Sense bytes associated with error
30
34
ORG
IOERECSW DS
IOERCHAN DS
IOERDATA
1F
1X
Breakdown fer channel check handler
ECSW information from channel lcgout
Channel type flag
IOEREND
OF
Label for end of IOERBLOK
DS
DS
IEM VM/370 Data Areas and Control Block Logic
10ERBLCK
Hexadecimal
Displacement
Field Description, Contents, eeaning
IOBR3211
50
•
Field
Name
Area where additional sense bytes may
be appended to IOERBLOK. The format
for one of these is described in
"ICER3211: Extended Outbcard Recording
Elock" later in this section.
Channel Check Reflection Extension
50
IOERCCRL
58
10ERC01D
IOERCCRA
10ERCftDL
60
IOERUID
68
10ERFAtD
78
10ERCCCW
80
IOERCCSW
88
90
IOERZCSW
IOERI!COA
Field
Name
Field Description, Contents, I!eaning
50
IOERCEXT DS
OD
50
54
58
5C
10ERCCRL
IOERCCRA
IOERCOID
IOERCI!DL
DS
DS
DS
DS
F
F
F
H
5E
IOERftCEL DS
H
60
68
78
80
88
8C
90
IOEROID
IOERFADD
IOERCCCW
IOERCCSW
IOERZCSi
IOERDTYP
IOERCH1D
DS
DS
DS
DS
DS
DS
DS
D
~hg~ls
defined in IOERCHID
EOU---X'05'
EOO
X'06'
EOO
X'07'
EOO
1'08'
IOER2860
IOER2870
IOERB80
IOERS80
91
94
96
IOERLOGL
IOERCLOG
98
Hexadecimal
Displacement
IOERDTYP
10ERCCOA
1*5 I
IOERftCEL
IOERCCOA DS
IOERftCOA DS
IOERLOGL DS
8H
D
D
F
F
CL1
CL3
CL2
CL2
1*5
Extension used only for channel check
reflection
Length of channel check record
Address of channel check recerd
Processor identification
Processor model number (for examFle,
0158, 0168, etc.)
ftaximum length of machine check
extended logout area (model-dependent)
Oser identification
Active input/o~tput units
Failing CCW
Failing CSi
Failing ECSli
CP device type
Channel identification
Stanaalone selector (2860)
Stanaalone multiplexer (2870)
Stanaalone tlock multiplexer (2880)
Selector channel (2880)
Actual failing device aadress
Address fro. processor locaticn I'BA'
Length of channel logout
Section 1. CP Data Areas and Centrel Blocks
29
IOERBLOK
Bexadeci.al
Displacement
---~--------
30
Field
Halle
Field Descripticn, contents, I!eaning
F
-------------------------------------Channel logout area
98
IOERCLOG DS
98
IOERCLOG
ORG
IOERLG80 DSCL112
2880 channel (112 bytes)
98
ORG
IOERLG70 DS
IOERCLOG
CL24
2870 channel (24 bytes)
98
ORG
IOERLG60 DS
IOERCLOG
CL24
2860 channel (24 bytes)
98
9C
ORG
IOERADDR DS
IOERLG33 DS
IOERCLOG
F
CL640
Unit address stored ty integrated channel
3033 channel (640 bytes)
9C
ORG
IOERLG45 DS
IOERLG33
CL96
145 integrated channel (96 bytes)
9C
ORG
IOERLG35 DS
IOERLG33
CL24
135 integrated channel (24 bytes)
IOERSIZE EQU
(*-IOERBLOK)/8 IOERELOK size in doutlevords'
IBM VM/370 Data Areas and Control Block Logic
IR8ELCK
IRMBLOK provides the information necessary for the implementation of intensive recording
mode via CP SET RECORD command. Intensive recerding mode allows the recerding of unit
check errors from a specified device whose sense data matches the values selected.
I
o 1/////IR8FWPTR////////////1
8
Hexadecimal
Displacement
-----------0
4
6
8
9
A
B
C
E
F
IR8RLADD
IReL8T
1-----------------------------------------------------IR8L8TCT
1*5 1 1*6
1 1*1 1 1*2 1 1*3 1 1*4
Field
Name
IR8FWPTR
1R8RLADD
IR8LMT
1R8BYT1
1R8B1T1
1RMBYT2
1R8B1T2
1R8LMTCT
1RM8AXCT
IRMFLG
Field Description, Contents,
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1H
1H
1X
1X
1X
1X
1H
1X
1X
~eaning
-------------------------------------1*1
1*2
1*3
1*4
1*5
1*6
Reserved for IBI! use
Device address to te monitered
Limit count - record every ]!tb error
First sense byte specified
Sense bit within first sense byte
Second sense byte specified
Sense bit within second sense byte
Summary count for lillit detectien
count of recordings made fer this request
Flag tyte
Bit§ g~!!ned in IR8FLG
IR8AND
EQO --X'80'-IRMOR
EQO
X'40'
AND conditien specified
OR cendition specified
IR8SIZE
1R8ELOK size in doutlewords (X'02')
EQO
(*-IR8BLOK)/8
Section 1. CP Data Areas and Centrel Blocks
31
JPSCBLOK
The JPSCBLOK is a part of DMKSYS. It is referenced via the EXTERNAL symbel DBKSYSJR. It
is used to centrol the LOGON/AUTOLOG/LINK Journaling and Password-cn-the-coaaand-line
Suppression functions.
o
JPSLOGU
S
JPSLNKU
10
1S
Hexadecimal
Displacement
------------
JPSPCHN
Field
Nalle
Field Description. Contents, Beaning
JPSLOGU
DS
CLS
S
JPSLNKU
DS
CLS
JPSPCHN DS
JPSFLIGS DS
1F
1X
--------------------------------------
J*1
j!it§ g~fi1!~g in JPSFLG
LOGONJRL EOU X '80--LI1fKJRL
EQU 1--40'
LIHKJRL1 EOU X'20'
JRLSQOK EQU X'10'
!!ASKLOG EQU X'OS'
MASKLINK EOU X'04'
32
J*2
RESERVED
J*5 I J*6 I J*7
0
10
14
J*1
LOGON/AUTOLCG journaling OJ
SuccessfulL:INK journalingCI
Invalid password LINK journaling ON
SET/CUERY JCURNAL enabled
Suppress LOGON password
Suppress LIBK password
15
JPSLOGAR DS
1X
J*2
16
17
1S
19
1A
1B
JPSLOGMS
JPSLOGDS
JPSLNKAR
JPSLNKMS
JPSLNKDS
1X
1X
1X
1X
1X
XL5
J*3
J*4
J*5
J*6
J*7
DS
DS
DS
DS
DS
DS
Userid for LOGON/IUTCLOG
threshold aessages
Userid for LINK threshold
messages
Anchor for FWDIBLOKs
Control flags
LOGON/AUTOLOG accounting record threshold
aessages
LOGON/AUTOLCG message threshcld
LOGON/AUTOLCG disable threshold
LINK accounting record threshold
LINK message threshold
LINK disable threshold
Reserved for IB! use
IBM VM/370 Data Areas and Control Block Logic
LOCKBLCK
LOCKELOK is used to synchronize execution for sections of nonreenterable code. Locked
users are returned to the CPEXBLCK queue when the function teing executed coapletes or no
longer requires nonreenterable resources. LOCKELOKs are queued eff DMKSYSLE.
o
r
I
,
LOCKNEXT
LOCKQUE
I
1------------------------------------------------1
LOCKNAME
I
8 I
Hexadecimal
Displacement
-----------0
4
8
Field
Field Description, Contents, Meaning
Name
Pointer to the next lock centrol block
Pointer to CPEXELOK queue
The name being locked
LOCKNEXT DS
LOCKQUE DS
LOCKNAME DS
1F
1F
1D
LOCKSIZE EQU
C*-LOCKELOK)/8 LOCKELOK size in doutlevords (X'02')
Section 1. CP Data Areas and Centrol Elocks
33
MCHAREA
MCHAREA provides CP with statistical data that relates to malfuncticns of the real
processor, tc its buffers, to processor storage for damage assessment, and to the
recovery of VM/370.
o
8
10
MCHDAMLN
M*1
I M*2
I M*3
M*5
2
4
8
C
D
10
10
I M*7
I M*8
1*6
I 1*7
I 1*8
MCHLSUM
N*1
1*2
I N*3
I N*4
N*5
MCHFSAR
MCEFSAV
50
MCHFSEAV
MCBPDARI
Field
Name
Field Description, Contents, Meaning
MCHDAMG:E DS
OH
Damage
MCHDAMLN
MCHPROCA
MCHREC
MCHCPEX
MCHMODEL
1H
XL2
1F
1F
1X
Length of damage assessment area
Processor address
Machine check record address
Machine check CPEXBLCK address
Model numter for the machine
DS
DS
DS
DS
DS
L*1
~ssE!ssment
ar.~Ci
Bits defined in MCHMODEL
iiODEL2QO-EQU --X'18'--MODEL210 EQO
X'18'
MODEL200 EQU
X'18'
MOD3033 EQU
X'14'
MOD3032 EQU
X'14'
MOD3031 EQU
X'14'
MODEL168 EQU
X'10'
MODEL165 EQU
X'10'
MODEL158 EQU
X'OC'
MODEL155 EQU
X'OC'
MODEL148 EQU
X'08'
MODEL145 EQU
X'08'
MODEL138 EQU
X'04'
MODEL135 EQU
X'04'
NOMODEL EQU
X'OO'
ID
ID
ID
ID
It
ID
ID
ID
ID
ID
ID
ID
ID
ID
No
MCHRESEV DS
MCHDAMFL DS
MCHFLAGO DS
Reserved for IBM use
Damage assessment data
System status
3X
OBL8
1X
Bits defined in MCHFLAGO
iiCHOHDWi-EQO --X'80'-MCHOSFTR EQO
X'40'
MCHOUSAD EQO
X'20'
MCB1GERR EQU
X'10'
MCHOTERM EQO
X'08'
MCBOQUIT EQU
X'04'
34
I
I M*6
48
Bexadecimal
tisplacement
o
o
MCBREC
--------------------------------------------------------1
MCHCPEX
L*1 I////I/MCBRESEV//////I
18
40
I
MCHPROCA
M*1
number for the 240 machine
number for the 210 machine
number for the 200 machine
number for the 3033 processor
number for the 3032 processor
number for the 3031 processor
number for the 168 machine
number for the 165 machine
number for the 158 machine
number for the 155 machine
number for the 148 machine
number for the 145 machine
number for the 138 machine
number for the 135 machine
support for machine
Hardware recovery
Software recovery
User abnormally terminated
Channel inoperative
Operating system termination
Quiet mode in effect
IBM VM/370 Data Areas and Control Block Logic
MCHAREA
Hexadecimal
Displacement
11
Field
Name
Field Description, Contents, Meaning
MCHFLAG1 DS
!!it§
g~f11!gg
MCH1MAIN
MCH1BUFF
MCH1COST
MCH1GERR
MCH1PROC
MCH1TODC
MCH1SYSD
12
13
BQU
EQU
EQU
EQU
EQU
EQU
EQU
1X
Main storage
Euffer
Control storage
Indicates channel is inoperative if bit is on
Processor
Time-of-day clock
System damage
X'40'
X'20'
X'10'
X'08'
X'02'
X'01'
1X
1X
.:_
!!it 2 g~~!1!~g .Lll
14
M*3
M*4
1X
Intermittent error
Solid error
Data error
Protect error
M*5
Bits defined in MCHFLAG4
MCH4TOLO-EQU --X'80'--MCH4REPA EQU
X'40'
MCH4STRE EQU
X'20'
MCH4BURE EQU
X'10'
15
MCHFLAG5
DS
1X
MCHFLAG6 DS
MCHFLAG7 DS
!!i!§
18
40
40
41
1X
1X
MCH7SMCR
MCH7VRTM
MCH7SYST
MCH70PSW
MCH7VEQR
MCH7SUP
in MCHFLAG7
EQU --X'80'-EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
MCHLSUM
MCHPDAR
MCHPDARO
MCHPDAR1
DS
DS
DS
DS
M*6
M*7
M*8
MCHPDAR2
MCHPDAR3
MCHPDAR4
MCHPDAR5
MCHPDAR6
DS
DS
DS
DS
DS
1X
1X
1X
1X
1X
RMS wait state suffix
DMKMCH status
Second machine check recursion
Terminate the virtual machine
Terminate the system
Machine check old PSi in problem state
Terminate the virtual=real user
DMKMCH under the glotal system lock
Summary
N*1
N*2
Bits defined in MCHPDAR1
MCHP1 SDE-EQU --X'80'--MCHP1IDEEQU
X'40'
MCHP1SKE EQU
X'20'
MCHP1IKE EQU
X'10'
42
43
44
45
46
RMS information status
Invalid hardware logout
Invalid machine check interrupt code
Invalid failing storage address
gg!i1!~g
XL40
OBL8
1X
1X
RMS action data
Time-out loop
Repair
Storage reconfiguration
Buffer reconfiguration
Bits defined in MCHFLAG5
MCH5INLG-EQU -X'80'-MCH5INMC EQU
X'40'
MCH5IFSA EQU
X'20'
16
17
Damage area (continued)
Error type
M,..tl"'T""'~
J:J'-UJ:JJ.t1u.:J
EQU --X'80'--EQU
X'40'
EQU
X'20'
EQU
X'10'
MCHFLAG4 DS
Damage area
in MCHFLAG1
--x'SO'---
MCHFLAG2 DS
MCHFLAG3 DS
MCH3INTE
MCH3S0LD
MCH3DATA
MCH3PROT
M*2
Acticn taken
Failure type
Solid storage data error
Intermittent storage data errcr
Solid SPF key error
Intermittent SPF key error
N*3
N*4
N*5
N*6
N*7
Operating system status
Location of failure
Location of failure
Requested operator awareness
Flag byte
Section 1. CP Data Areas and Control Blocks
35
MCHAREA
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
~!!§ g~!!~g
in MCBPDAR6
MCBP6CBA EQU --X'80-'- -
47
MCBPDAR7 DS
1X
Bits defined in MCBPDAR7
MCB7STCK-EQU --X'80'--MCH7GSTR EQU
X'40'
MCB7PURG EQU
X'20'
MCB7LOGO EQU
X'lO'
MCB7EXIT EQU
X'08'
MCH7RSRE EQU
X'04'
MCB7IOEM EQU
X'02'
48
4C
50
54
36
Change bit active
N*8
Flag byte
Interfaces
Interfaces
Interfaces
Interfaces
Interfaces
Interfaces
Interfaces
for
for
for
for
for
for
for
STACK routine
GETMAIN routine
PURGE routine
V=R logoff routine
exit to CP
RELEASE and RESET routines
the recorder
MCBFSAR
MCHFSAV
MCBFSEAV
MCHPDARI
DS
DS
DS
DS
1F
IF
1F
1F
Failing location real address
Instruction address at failure
End of the failing location
End of the failing virtual stcrage address
MCHLENl
MCHLEN
MCHFIX
EQU
EQU
EQU
*MCHDAMAGE
*MCHRESEV
280+48
Length of damage assessment area
Length of area to be cleared
Length of the fixed logout and the header
record for machine check handler
IBM VM/370 Data Areas and Control Block Logic
ftCRECOBD
MCRECORD provides the necessary
processor and main storage.
0
ft*1
1 ft*2
1 ft*3
extended logout
information
ftl..SiITCH
M*4
8
ftCDATE
10
ftCCPUID
18
MCPROGID
20
MCJOBID
28
ftCOLDPW
30
ftCFIDLOG
148
ftCEITLOG
for
error recording
of
I
ft*5
l/ft*6//1
(Variable Length)
I!CHDlftAG
(80 bytes)
Hexadecimal
Displacement
Field
Name
o
o
MCREC
DS
OD
ftCRECTYP
MCOPSYS
MCSiONE
I!CSWTWO
I!CSiITCH
MCRECCNT
MCRECCC
I!CDATE
I!CCPUID
MCPROGID
MCJOBID
I!C01DPW
I!CFID10G
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
11
11
11
11
21
11
11
118
118
118
118
Its
35D
FID1G1H
EQU
(*- !!CFIDtOG)
Length of machine check fixed logout area
I!CEIT10G EQU
*
MCHDII!AG EQU
*
Beginning of machine check extended logout
(the extended logout length is variable
length and machine dependent)
Damage assessment area (80 bytes)
1
2
3
4
6
7
8
10
18
20
28
30
148
Field Description, contents, fteaning
ft*1
ft*2
ft*3
ft*4
ft*5
ft*6
ftachine check record type
Operating system
Record independent switch
Record dependent switch
Unused switches
Record count
Reserved for IBft use
Date and ti.e
Processor identification and .odel number
Program identity
Job identity (unused)
ftachine check old PSi
ftachine check fixed logout
Section 1. CP Data Areas and Control Blocks
37
MtRREC
MDRREC retains information for the VM/370 error recording cylinders.
o
I
MDRKEYB
I M*1 I/M*2//I/B*3/1 M*4
10
18
MDRCPID
MDRCUA1
MDRVOL
20
Hexadecimal
o
2
3
4
5
6tR'I'MEN
MDRDTEN
8
I////ftDRSPE1////1
MDRSENS
Field
MDRKEYN
MDRSllS1
MDRSllS2
MDRSWS3
MDRRECNT
1B
1C
1C
1C
1C
DS
DS
DS
DS
DS
M*1
M*2
M*3
6*4
Type and operating system
Switch byte 0
Reserved for IBM use
Reserved for IBM use
Sequence (4 bits) and record (4 bits)
Used for sequence number
Indicates the record total
6
8
C
10
18
1A
20
MDRSPE1
MDRDTEB
MDRTMEB
MDRCPID
Reserved for IBM use
Date
Time
Processor identification and model number
MDRCUA1
MDRVOL
MDRSENS
DS
DS
DS
Q2ta
21
61
241
primary CUA of device
Volume serial number of device
Sense byte data
MDRSIZE
EQU
(*-MDRREC)
MDR record size
§,YEEQrt
MDRCUA1
21
11
11
21
21
21
Line address
Control unit address
Device address
Sense and status informaticn
Resource identification
Reserved for IBM use
§,YE.EQrt
MDRCUA1
21
81
21
Device address
Userid
Resource identification
18
1A
1B
1C
1E
20
I.Qf JIQ.2
38
1B
1F
1F
2F
Q~ic~ Q~£~~g~~!
I.Qf JlIQ
18
1A
22
DS
DS
DS
DS
Re'!Q!~
ORG
DS
DS
DS
DS
DS
DS
Re)g!~
ORG
DS
DS
DS
IBM VM/370 Data Areas and Control Block Logic
IHCBLCK
MICBLOK contains pointers to control registers, the segment table, and other values
required by the virtual machine assist feature and the VM/370 Extended Control-Program
Support (ECPS). This information is needed for the handling of certain instructions and
privileged operations requested by the virtual machine.
The VMMICRO field of the VMBLCK
points to MICBLOK.
o
MICRSEG
IHCCREG
8
MICVPSW
MICWORK
10
MICVTMR
MICACF
Hexadecimal
Displacement
o
Field
Name
Field Description, Contents, Meaning
4
8
MICRSEG
MICCREG
MICVPSW
DS
DS
DS
1F
1F
1F
Real segment table pointer
Virtual control register pointer
Virtual PSW pointer
8
l'IICVIP
ORG
DS
MICVPSW
1X
Virtual interrupt pending bit
Virtual interrupt is pending; therefore, the
virtual machine assist feature is net to
handle change of PSW channel masks or
external mask from disabled to enabled.
All other bits in this byte must be O.
9
DS
3X
Address of virtual PSW
10
MICWORK
MICVTMR
DS
DS
1F
1F
14
MICACF
DS
1F
Workspace pointer
Location to be decremented when the virtual
interval timer assist feature of VM/370
ECPS is being used
Assist controls
14
MICEVl'IA
ORG
DS
MICACF
1X
Expanded virtual machine assist control bits
C
!!i!§
g~!i1!gg
MICLPSW
MICPTLB
MICSCSP
l'IICSIO
l'IICSTSM
IHCSTPT
l'IICTCH
15
l'IICSIZE
EQU
EQU
EQU
EQU
EQU
EQU
EQU
in MICEVl'IA
--X'80'-X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
LPSW simulation
PTLE simulation
SCKC, SPT simulation
SIO simulation
STNSM, STOSM. and SSM simulation
STPT simulation
TCH simulation
DS
3X
Reserved for IBM Use
EQU
(*-MICBLOK)/8
Size of tSECT in doutlewords (X'03')
Section 1. CP Data Areas and Control Blocks
39
MIHREC
MIHREC is used in the SVC 76-initiated error
Interrupt Handler) records.
recording process of tYFe
70 MIH (Missing
I
0
MIHKElN
8
I 1*1
I/A*2//I/A*3//I/l*4//I///MIHSPE1////1
10
MIHCPID
18
MIHJOB
MIHCUl2
28
MIHVOL (cont. )
Hexadecimal
Displacement
2
3
4
5
6
8
C
10
40
IHBDEVT
MIHINT
Field
Name
MIHKElN
MIHSiS1
MIHSiS2
MI!I$WS3
MIHRECNT
MIHSPE1
MIHDTEN
MIHTMEN
MIHCPID
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
1H
1C
1C
1C
1C
1H
1F
1F
2F
Q~xic~ Q~Fend!A!
18
20
23
26
2C
30
MIHVOL
MIHCUl1
20
30
o
MIHTMEN
MIHDTEN
1*1
1*2
1*3
1*4
Type and operating system
Switch byte 0
Reserved for IBM use
Reserved for IBM use
Reserved for IBM use
Reserved for IBM use
Date
Time
Processor identification and model number
Qatg
MIHJOB
MlijCUl2
MIHCUl1
IHHYOL
IUHDEYT
MIHINT
DS
DS
DS
DS
DS
DS
8X
3X
3X
61
41
8X
IHHSIZE
EQU (*-MIHREC)
Job whose I/O request is pending
CUI used to address the device
Primary device address
Volume serial number of device
Device type
Time interval used to check Fending
interrupt
MIH record size in deublewcrds (X'07')
IBM VM/370 Data lreas and Centrol Block Logic
HNBDB
MNBDR provides header information for following monitor records.
o
MIBRECSZ
I///RSVD////I M*1
elHCODE
MIHTOD (cont.)
8
L
Hexadecimal
Displacement
------------
Field
Name
Field Description, Contents, eeaning
--------------------------------------
0
aNBHDLEN BQU
Of
Length of
0
MIHRECSZ
RSVD
MNHCLASS
BNHCODE
BIHTOD
1B
1H
11
IL2
ILS
Record size
Reserved for IBe use
Bonitor class
Bonitor code
Current TOD value
2
4
S
7
DS
DS
DS
DS
DS
BNHDRLEI EQU
II
*-BNHDR
B*1
B*2
401."",
'-41""
~'''',.1r
.IJ."" . . . . .n.
header
,.
1171:1
~
.... "" ........ ,
-F,.. ...... ",,+\
Length of header record
Section 1. CP Data Areas and Control Blocks
41
MNOOO
MNOOO provides an area for the accumulation of records dealing with privilege operations,
paging, dispatching, and interrupt activity.
01•
I
81
I
101
I
18
r--
MNOOOWlD
MNOOOHl
MNOOOHD
MNOOOTC
MNOOOMN
MNOOOWlO
EOI
I
ESI
I
CO
MNOOOMO
MNOOOIR
MNOOOPRB
C8
MNOOOCP
MNOOOCH
MNOOOWPG
20
MNOOOPSl
MNOOOCPA
DO
MNOOOTE
MNOOOCE
28
MNOOONFL
MNOOOPSN
DE
MNOOOCT
MNOOOPE
30
MNOOOPRC
MNOOORPC
EO
MNOOOPT
MNOOOEP
38
MNOOOSPC
!!NOOOFLF
ES
MNOOOlP
!!NOOOPB
40
MNOOOCPT
MNOOOSS
FO
MNOOORR
MNOOOTCL
48
MNOOOPFF
MNOOOPRF
FS
MNOOOLCL
!!NOOOCS
50
MNOOOPCS
!!NOOONXR
100
ENOOOCD
l!NOOOHDl
58
MNOOOCPR
!!NOOOCVl
108
!NOOONDU
l!NOOONAU
MNOOOCCW
MNOOOlTl
110
!!NOOOPRD
l!NOOOPWR
!!NOOOPTl
!!NOOOCKl
118
I'lNOOONPP
MNOOOSWS
MNOOOCSV
MNOOOCPG
12C
l!NOOOQ1N
l!NOOOC2N
"NOOOClO
!!NOOOCDS
12S MNOOOQ1E IMNOOOQ2E ,!!NOOOlNT IMNOOOPPA
MNOOOCDA
MNOOOCDB
13CIMNOOOPPC 1/////////1
!!NOOOCSC
MNOOEK
MNOOOlK
MNOOOMS
MNOOOLP
MNOOODl
MNOOOSl
MNOOOSF
MNOOOTl
MNOOOCl
601
t
68,
I
701
I
781
I
80,
,
881
I
901
I
981
I
AOI
I
A81
Hexadecimal
Displacement
-----------0
8
10
18
20
24
28
2C
30
42
Field
Name
MNOOOWlD DS
!!NOOOWPG DS
MNOOOWIO DS
MNOOOPRB DS
MNOOOPSI DS
MNOOOCPA DS
MNOOONFL DS
MNOOOPSN -DS
MNOOOPRC DS
PlNOOOlSD
1-----------------------------------1381
MNOOOGTM
MNOOODQM
1----------------------------------1401
l!NOOOSWP
!!NOOOEXT
1-----------------------------------1481
MNOOONXT
!!NOOOATT
,15CII------------------------------------~
l!NOOOCNT
,
Field Description, Contents, Meaning
XL8
IL8
XL8
XL8
1F
lF
1F
1F
1F
Total system idle wait time
Total system page wait time
Total system I/O wait time
Total system problem state time
No. of paging SIOs
No. of calls to DftKPAG
No. of page frames currently cn free list
No. of pages currently being swapped
No. cf pages flushed but reclaimed
IBM VM/370 Data Areas and Control Block Logic
l!NOOO
Hexadecimal
Displacement
-----------34
38
3C
40
44
48
4C
50
54
58
5C
60
64
68
6C
10
74
78
7C
80
84
88
8C
90
94
98
9C
AO
A4
A8
IC
BO
B4
B8
Be
CO
C4
C8
CC
DO
D4
D8
DC
EO
B4
B8
BC
FO
F4
F8
FC
100
104
108
10C
110
114
118
Field
Na.e
l!NOOORPC
l!NOOOSPC
l!NOOOFLF
l!NOOOCPT
MNOOOSS
MNOOOPFF
MNOOOPRF
l!NOOOPCS
MBOOONXR
MNOOOCPR
l!NOOOCVI
MNOOOCCi
l!NOOOITI
MNOOOPTI
MNOOOCKI
!NOOOCSY
MBOOOCPG
MBOOOCIO
MBOOOCDS
l!BOOOCDA
l!NOOOCDB
MBOOOCSC
MBOOOEK
MNOOOIK
MBOOOMS
MBOOOLP
MBOOODI
MNOOOSI
liNOOOSF
l!NOOOTI
liNOOOCI
MNOOOHI
MNOOOHD
l!NOOOTC
MNOOOI!N
MBOOOMO
MNOOOLR
liNOOOCP
MNOOOCB
MNOOOTE
MNOOOCE
l!NOOOCT
MNOOOPE
MNOOOPT
MNOOOEP
l!NOOOIP
MNOOOPB
MNOOORR
MNOOOTCL
l!BOOOLCL
MNOOOCS
MNOOOCD
MNOOOBDI
l!NOOOBDU
MNOOOBAU
liNOOOPRD
MNOOOPiR
MNOOONPP
Field Descripticn, Contents, l!eaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1F
1F
1F
IF
1F
IF
1F
1F
1F
1F
1F
IF
1F
1F
IF
1F
1F
IF
IF
IF
1F
lF
IF
IF
1F
1F
1F
IF
1F
IF
1F
IF
1F
IF
IF
1F
IF
1F
IF
IF
IF
IF
IF
IF
1F
1F
IF
1F
IF
1F
IF
1F
-------------------------------------No.
No.
No.
No.
Bo.
No.
Bo.
No.
No.
Bo.
No.
No.
Bo.
Bo.
cf
cf
of
cf
cf
of
cf
cf
of
cf
cf
cf
cf
of
of
reserved pages
shared system pages
times the free list was empty
calls to D!KPTBFB
pages stolen from in-queue users
pages swapped fro. the flush list
pages examined in stealing a Fage
full scans done in stealing pages
real external interruFtions
calls to Dl!KPRVLG
calls to DMKVIOEX
calls to DftKCCi from DMKVIO
interval timer interruptiens reflected
processor timer interruptions reflected
clock comparator interruFtions ....
NOe
No. v.L SVC interruptions reflected
No. cf program interruptions handled
No. of I/O interruptions handled
No. of calls to Dl!KDSP (main entry)
Bo. of fast reflects in Dl!SDSF
Bo. cf dispatches for new FSis
Bo. of calls to DMKSCBDL
Instruction count for X'08' SSK
Instruction count for X'09' ISK
Instruction count for X'80' SSM
Instruction count for X'82' LFSi
Instruction count for X'83' DIAG
Instruction count for 1'9CXO' SIO
Instruction count for X'9CX1' SIOF
Instruction count for X'9DXO' TIO
Instruction count for X'9DX1' CLRIO
Instruction count for X'9EXO' BIC
Instruction count for X'9EX1' BDV
Instruction count for X'9F' TCB
Instruction count for X'AC' STNSM
Instruction count for X'AD' STOSM
Instruction count for X'Bl' LRA
Instruction count for X'E202' STIDP
Instruction count for X'E203' STIDC
Instruction count for X'E204' SCK
Instruction count for X'B206' SCKC
Instruction count for X'B207' STCKC
Instruction count for X'E208' SFT
Instruction count for X'E209' STPT
Instruction count for X'E20A' SPKA
Instruction count for X'E20E' IPK
Instruction count for X'E20D' PTLB
Instruction count for X'E213' RRE
Instruction count for X'E6' STCTL
Instruction count for X'E7' LCTL
Instruction count for X'EA' CS
Instruction count for X'EB' CDS
Diagnose disk I/O simulaticn count
No. of users dialed to a virtual machine
Bo. of users logged on
Bo. cf page reads
No. cf page writes
No. of system pageable pages
~4='".,.~,,;I
..a...",;;;;~""'~'-''''''IIi;U
_6:
Section 1. CP Data Areas and Centrol Blocks
43
MNOOO
Hexadecimal
tisplacement
Field
Name
Field Description, Contents, !!eaning
11C
120
124
128
12A
12C
12E
MNOOOSWS
ftNOOOQ1N
MNOOOQ2N
MNOOOQ1E
MNOOOQ2E
ftNOOOINT
ftNOOOPPl
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1H
1H
1H
1H
130
132
134
138
13C
140
144
148
14C
150
ftNOOOPPC DS
DS
MNOOOISD DS
MNOOOGTM DS
!!NOOODftQ DS
MNOOOSWP DS
!!NOOOEIT DS
MNOOONXT DS
!!N0001TT DS
MNOOOCNT DS
1H
1H
1F
1F
1F
1F
1F
1F
1F
1F
Sum of working sets of in-queue users
No. of users in Q1
No. of users in Q2
No. of users eligible for C1
No. of users eligitle for C2
!!ONITOR sampling interval (in seconds)
Pseudo-cylinders'
of allocated
temporary
space
Pseudo-cylinders 1 of systea temporary space
Reserved for IB!! use
Count of mini I/O tlock stack deFletes
Count of m1n1 I/O tlocks in the queue
Count of mini I/O tlocks processed
Count of SIOs on alternate path
Count of free storage extensions
Count of release of free storage extensions
Count of TRYSPLIT attempt
Count of sutpool splits
MNOOOLEN EQU
*-!!NOOO
Record length in bytes
lA pseudo-cylinder comprises 100 available page slots for all system-owned volumes.
total available pseudo-cylinders per device is determined by the formula:
(number of cylinders X number of records per cylinder for a device)
100
44
IBM VM/310 Data Areas and Control Block Logic
The
ftN001
ftN001 gives information on the Ferformance of the Attached Processor.
a
ftN001WID
8
ftN001WPG
10
ftN001WIO
18
ftN001PRB
20
MNOOlNXR
ftNOC1CSV
28
I!IOO1PRD
ftNOC1PWR
30
ftN001SSY
ftNOC1NSY
38
ftN001SFR
ftNOC1NFR
40
ftN001SRN
ftNCC1NRN
48
ftN001STft
ftNOC1NTft
50
ftN001SDP
ftNOC1NDP
58
ftN001NFL
ftNOC1NF~
60
ftN001NSD
ftNOC1NVD
68
ftN001NRU
Hexadeciaal
Displaceaent
o
Field
Naae
Field Description, Contents, fteaning
10
ftN001WID DS
ftN001WPG DS
ftN001WIO DS
18
i!i1i001PRB DS
20
ftN001NR
DS
1F
24
ftN001CSV DS
1F
28
2C
ftN001PRD DS
ftN001PWR DS
1F
1F
30
34
38
3C
40
44
48
4C
50
54
58
5C
60
64
68
ftN001SSY
ftN001NSY
!!N001SFR
ftN001NFR
ftN001SRN
ftN001NRN
ftN001STft
ftN001NTft
ftN001SDP
ftN001NDP
ftN001NFL
ftN001NFS
!!N001NSD
ftN001NVD
ftN001NRU
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
L8 Attached processor idle wait time
L8 Attached processor page wait time
L8 Attached processor I/C wait time
L8 Attached processor problem state time
Number of external interru~ts tc the attached
processor
Number of SVCs reflected by the attached
processor
Nuaber of page reads by attached Frocessor
Number of page writes by the attached
processor
Total time spin on systea lock
Total number of spins for systea lock
Total time spin on D!KFRE lock
Total number of spins for tftKFRE lock
Total time spin on RUNLIST lock
Total number of spins for RUNLIST lock
Total time spin on timer request lock
Total number of spins for timer request lock
Total time spin on displacement lock
Total number of spins for ais~lacement leck
Number of times CPFRELK set
Number of times CPFRESW set
Number of times system lock request deferred
Number of times VftBLCK leck deferred
Number of D~KDSPRU entries
*-ftN001
Length of record
8
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
ftN001LEN EQU
Section 1. CP Data Areas and Contrel Blocks
45
MN097, MN098
MN097 provides header information for a file that
Monitor. This is the first record of the file.
o
MN097CPU
8
ftN097LEV
10
MN097DAT
18
MN097TIM
20
MN097UID
contains data accu.ulated
28
MN097CR8
MN097NUC
30
MN097FSS
MN097DPA
38
MN097TTS
MN097VR
40
MN097CPL
MN097APL
Field
Name
Hexadecillal
Displacement
-----------0
8
10
18
20
28
2C
30
34
38
3C
40
42
MN097CPU
MN097LEV
MN097DAT
MN097TIM
MN097UID
MN097CR8
MN097NUC
MN097FSS
MN097DPA
MN097TTS
MN097VR
MN091CPL
MN091APL
by Vft/370
Field Description, Contents, fteaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
MN091LEN EQU
--------------------------------------
Processor serial numter and .odel number
Prograa level change
Current date
Current time
Userid of user who invoked !!CIUTOH
Value of control register 8
Size of nucleus
Size of free storage
Size of dyna.ic paging area
Size of trace table
Size of V=R area
Logical address of main prccessor
Logical address of alternate Frccessor
IL8
CL8
CL8
CL8
CL8
1F
1F
1F
1F
1F
1F
1H
1H
*-MN097
Length of header record
MN098 contains the userid of the user who has terminated current V!!/370 !!enitor activity.
This is the last record of the file.
o
Hexadecimal
Displacement
o
46
MN098UID
Field
Name
Field Description, Contents, fteaning
MN098UID DS
CL8
ID of user stopping the V8/370 ftonitor
MN098LEN EQU
*-MN098
Length of trailer record
IBM VM/370 Data Areas and Control Block Logic
MN099, MN10X
MN099 contains information recorded when VM/370 Monitor activity is sus Fended because all
tuffers are full and are queued for output.
f
o I
MN099CNT
MN099TOD
I------------------------------------------------------~
8 I
Hexadecimal
Displacement
M*1
Field
Naae
Field Description, Contents, Meaning
DS
DS
115
MN099CNT
MN099LEN
EQU
*-MN099
5i099TOD
0
5
MN10X contains information
for a given userid.
XL4
Length of the suspension record
on the number of
o
8
TOD clock value at suspensicn
Count of suspensions
M*1
inFut or cutput console
line transmissions
MN10XUID
MN10XADD
M*1
MN10YIO
Hexadeciaal
Displacement
o
a
A
B
Field
Name
Field Description, Contents, l!eaning
--------------------------------------
MN10XUID DS
MN10XADD DS
CLa
1H
MN10XLEN EQU
*-MN10X
l!N10YCNT DS
1x
MN10YLEN EQU
*-MN10X
Long record, header length
MN10YIO
*
Input/output line starts here
EQU
Userid
Terminal line address
Short record length
l!*1
Eyte count for the following line
Section 1. CP Data Areas and Control Blocks
47
MN20X
MN20X contains VM/370
and spool activity.
Monitor data on CP's scheduler activity,
o
MN20XNPP
MN201SWS
10
MN20XQ1N
MN201Q2N
MN20XQ1E
MN2CIWSS
MN20YTTI
28
MN20YVTI
30
MN204PBI
MN202PGB
38
MN202BES
MN202PST
40
MN202PNC
48
MN202CRD
MN202APR
MN202BEF
MN20210C
MN202LIN
Field
Na.e
Field Description, Contents, Meaning
10
14
18
1A
1C
1E
MN20XOID
MN20XNPP
MN20XSWS
MN20XQ1N
MN20XQ2N
MN20XQ1E
MN20XQ2E
MN20XWSS
MN20XQNM
1F
MN20XPRC DS
11
MN203LEN EQO
*-MN20I
Length of class 2 code 3 record (ldd queue)
20
28
30
MN20YTTI DS
MN20YVTI DS
MN204PBI DS
Its
Its
1F
Current VMTTIME (CP simulation time)
Current VMVTIME (user virtual ti.e)
Eligible list priority
30
32
OBG
MN202PRI DS
MN202PGB DS
MN204PBI
1H
1H
MN204LEN EQO
*-MN20X
34
MN202APB DS
1H
36
MN202BEF
MN202BES
MN202PST
MN202IOC
MN202PNC
MN202LIN
MN202CBD
MN202LPB
1H
1H
1H
1F
1F
1F
1F
1X
8
C
38
3A
3C
40
44
48
4C
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
MN202LEN EQO
48
MN20XQ2E
20
Hexadecimal
Displacement
o
MN20IUID
8
18
dispatch queues, paging,
CL8
1F
1F
1F
1F
1H
1H
1H
1X
M*1
M*2
*-MN20X
Userid being added and/or drcFped fro. queue
No. of system pageable pages
No. cf working sets of in-queue users
No. of users in Q1
No. of users in Q2
No. of users eligible for C1
No. cf users eligitle for C2
User's projected working set size
Queue wherein additions and/or deletions
are being made
CP TRACE tatle processor identification
Dispatch priority
Pages read Whi~~__ ~~queue I
Length of class 2 code 4 record (DroF queue)
M*3
Sum cf pages-read that are -Yesiae-n-{-----at each
paging operation
No. of pages referenced While in queue
Current numter of pages resident
No. cf pages stolen while in queue
Virtual nonspooled 510 count
Virtual cards punched
Virtual lines printed
Virtual cards read
Last processor on which execution tock Flace
Length of class 2 code 2 reccrd
eligible list)
IEM VM/370 Data Areas and Control Block Logic
(add to the
ftN400
ftN400 provides user virtual machine statisticse
0
ftN400UID
8
ftN400TTI
10
ftN400VTI
18
MN400PGR
ftN400PGW
20
ftN400IOC
ftN4COPNC
28
ftN400LIN
MN4COCRD
30
ft*1
ft*2
ft*3
M*4
ft*5
38
ft*9
ft*10
ft*11
M*12
ft*13 1/!*14/1
40
48
Hexadecimal
Displacement
o
!N400PDR
!N400WSS
8*6
MN4COPDK
ft*7
I !*8
ftN400RES
!N400INT
ft*15
Field
Name
Field Description, contents, fteaning
8
MN400UID
MN400TTI
DS
DS
CL8
XL8
10
MN400VTI
DS
XL8
Userid
Current V!TTI!E (in V!ELCK); CP simulatien
time
Current V!VTI!E (in V!ELOK); user virtual
18
1C
20
24
28
2C
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
40
42
44
46
48
MN400PGR
MN400PGW
MN400IOC
MN400PNC
MN400LIN
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1X
1X
1X
1X
1X
1X
1X
1X
1X
1X
1X
1X
1X
1X
1H
1H
1H
1H
1H
1X
Total page reads for this user
Total page writes for this user
Virtual nonspooled SIO count
Virtual cards punched
Virtual lines printed
Virtual cards read
User running status
User dispatch status
User operating status
User queuing status
User processing status
User execution status
User tracing control status
User message level
User queue level
User command level
User timer level
Interrupt pending status
Directory or SET priority
Reserved for IBft use
Number of pages resident
Estimated working set size
Drum allocated page frames
Disk allocated page frames
Monitor sampling interval (in seconds)
Last processor on which executien toek place
ti:e
MN400CRD
DS
MN400RST
HN400DST
MN4000ST
MN400QST
MN400PST
MN400EST
MN400TST
MN400MLV
MN400QLV
MN400CLV
MN400TLV
!N400PND
ftN400UPR
MN4RSV1
MN400RES
MN400WSS
MN400PDR
MN400PDK
MN400INT
MN400LPR
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
MN400LEN
EQU *-ftN400
ft*1
ft*2
M*3
M*4
ft*5
!*6
!*7
ft*8
!*9
M*10
M*11
M*12
M*13
M*14
M*15
Length of class 4 code 0 record
Section 1. CP Data Areas and Centrel Elocks
49
MN500
MN500 provides data on instructions simulated by CP.
o
MN500UID
MN500lNS
8
10
Hexadecimal
Displacement
-----------C
8
C
10
50
MN5COVID
MN500VH
Field
Name
Field Description, Contents, Meaning
CL8
1F
1F
XL8
MN500UID
MN500lNS
MN500VAD
MN5000VH
DS
DS
DS
DS
MN500LEN
EQU *-MN500
Userid
privileged instruction
Virtual storage address cf the instruction
Current total of CP simulaticn time
Length of class 4 code 0 reccrd
IBM VM/370 Data Areas and Centrol Block Logic
MN600
I •
Header Record
I MN600HDR header record provides the number of device data packages.
o
Hexadecimal
Displacement
MN600NUM
Field
Name
o
,.
r
I
Field Description, Contents, Meaning
Number of device data packages that
follow length of header
~N600NUM
DS
1H
MN600HLN
EQU *-MN600HDR
Length of header
I/O Count Record
MN600DEV inFut/output
data packages.
o
r
I
count record provides
MN600ADD
information for
each device in
the device
MN600S:ER
MN600TY
I----------------------------------------------------~
MN600CNT
8 I
Hexadecimal
Bisplacement
-----------0
2
4
A
Field
Naae
Field Description, Contents, Meaning
1H
1H
CL6
IL4
Device
VM/370
Volume
Device
MN600DLN EQU
*-MN600DEV
Length of each data record
MN600MAI EQU
(4096-MNBHDLEN-MNHIRLEN-MN600HLN)/MN600DLN
Maximum device count
MN600ADD
MN600TY
MN600SER
MN600CNT
DS
DS
DS
DS
address
device type and/or codes
serial number of device
accumulated I/O count
Section 1. CP Data Areas and Control Blocks
51
MN602
I •
Header Keccrd
MN602HDR provides the number of sa.ples for intervals of device packagese
o
Hexadecimal
Displacement
Field
Name
o
I •
MN602SAM
Field Description, Contents, Meaning
8N602SAM DS
1H
Number of samples for interval
Utilizaticn Record
MN602 provides, via CP MONITOR co.mand,
There is one record for each device.
0
8
Hexadeci.al
risplacement
-----------0
2
4
6
8
A
C
for DlSD
and tape
devices.
r--------------------------------------------------------,
MN602ADD
MN602CHB
MN6C2CUE
8N602DVB
I
MN602CHQ
MR602CUQ
8*1
Field
Name
MN602ADD
MN602CHB
MN602CUB
MN602DVB
MN602CHQ
MN602CUQ
8N602DVQ
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
MN602DLN EQU
52
utilization data
1H
1H
1H
1H
1H
1H
1C
8*1
*-MN602DEV
Address of the device
Number of times channel is busy
Number of times control unit is busy
Number of times device is busy
Input/output tasks queued en channel
Input/output tasks queued cn the control unit
Input/output tasks queued cn device
Length of device portion in dcublevords
IBM VM/370 Data Areas and Control Block Logic
MN100
MN700 provides, via CP
DASD.
MONITOR, the I/O tasks and cylinder seek
o
8
10
MN700UID
MB700ADD
M*3
n ......... _;I!,...".;.".!!!II1
l1~Aa.U.~"""""_Q."'"
Field
tisplacement
Halle
-----------0
a
A
C
E
F
10
11
activity cf a specified
MN7CCCCY
MN700CYL
M*l
I M*4
MB700UID
MN700ADD
MN700CYt
MN700CCY
MN700QDV
MN700QCU
MN700QCH
8N700DIR
Field DescriptioD# Contents s Meaning
DS
DS
DS
DS
DS
DS
DS
DS
8B700tEB EQU
cta
1H
1H
1H
11
11
1X
1X
*-MN100
--------------------------------------
8*1
8*2
8*3
8*4
Userid
Device address
Cylinder l:eing sought
Current cylinder
I/O tasks queued on the device
I/O tasks queued on the contrcl unit
I/O tasks queued on the channel
Seek direction: OO=lower, 01=bigber
Length of class 7 code
o
record
section 1. CP Data Areas and Ccntrel Blocks
53
MN802
I •
Header Reccrd
MN802HDR provides the number of device block counters.
o
Hexadecimal
Displacement
o
2
I.
r--------------------------------------------------------"
MN802NUM
MN802CNT
I
Field
Name
Field Description, Contents, !eaning
Number of dev1ce block counters
MN802NUM DS
1H
that follow
MN802CNT DS
IL4
Device I/O count
MN802DLN RQU
Length of the header
*-MN802CTR
System Profile Data
MN802CTR provides, via CP MONITOR command, additional system profile data. The monitor
data includes: the I/O activity for each device, the number of logged en users, number cf
page read/writes, and the total system I/O, page wait, and proble. state times.
MN802NIU
MN8C2PGR
8
MN802PGW
MN8C2NPP
10
MN802WID
18
MN802WPG
20
MN802WIO
28
MN802PRE
Hexadecimal
Displacement
-----------0
4
8
C
10
18
20
28
,
o
Field
Name
MN802NAU
MN802PGR
MN802PGW
MN802NPP
MN802WID
MN802WPG
MN802WIO
MN802PRB
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
MN802CLN EQU
54
--------------------------------------
1F
1F
1F
1F
118
XL8
118
IL8
No. of logged on users
Total system page reads
Total system page writes
No. cf system pageable pages
Total system idle wait time
Total system page wait time
Total system I/O wait time
Total system problem time
*-MN802CTR
Length of each data entry
IBM VM/370 Data Areas and Control Block Logic
MNDEVLST
MNDEVLST prevides information on device activity.
Pointed to by MCNDVLST, it (MNDEVLST)
contains a list of RDEVBLOK addresses to be used ty class 6 (DASTAP)
data collection,
together with bins: for each device, in which the high frequency sampler (tMKENTTI) can
accumulate centrol unit and device busy counts during each monitor interval.
Note that
channel busy counts are accumulated in a separate area pointed to by MONCBPTR, 5
deublewords and 2 bytes per entry.
o
MNRDEVB
Hexadecimal
Field
Lisplacement
Naiie
o
4
6
MNRDEBV
MNCUBSY
MNDVBSY
MNCUESY
MNDVBSY
Field Description, contents. !eaning
DS
DS
DS
MNDEVLEN BQU
1F
1B
1B
Address of RDEVBLOK
Control unit busy count
Device busy count
*-MNDEVLST
Device entry size in doutlewcrds (1'01')
Section 1. CP Data Areas and Centrol Blocks
55
!ORCO!
!ONCO! provides
drive.
o
the control link
for CP's monitoring activity,
i
!ONARDB
i 0*1
i 0*2
nONDVNUn
i
28
-----------------------------------------------------1
MONDVLST
1/////////!OBRSV1///////////1
---------------------------------------------------1
MOIIIOB
!ONITRB
1
-----------------------------------------------------1
MONCLOCK
1
-----------------------------------------------------1
MONSUSCK
1
-----------------------------------------------------1
MONSUSCT
1/////////!OBRSVD1//////////1
30
MONSAVE1
70
!ONSAVE2
BO
MONUSER
8
10
18
20
B8
ftORSPLCT
!OBS-FB
CO
!OBCURV
MOBBXTV
C8
!OBCURR
l'IONIUTR
DO
MOBDASA
MONDASB
D8
MONDAS
EO
MOBCURBF
MOBCRSLT
E8
MOBIOBF
MORIOSLT
FO
MOBSKLST
MOBSACT
F8
MOBCBPTR
MOBUTRB
100
M*3
M*4
MOBBUFBO
l'IORBUF1
MORBUF1V
(Variable nu.her of buffers)
(Last address field)
56
the user, and
IBM VM/370 Data Areas and Control Block Logic
the tape
MCNCOM
Hexadecimal
Displacement
o
4
Field
Name
Field Description, Contents, Meaning
Bi!§ g~!1:~g
KONSYSVK EQU
CFSTOP
EQU
TRUN
EQU
ERROR
EQU
l!ONTIINT EQU
KONLSTBK EQU
l!ONIBUF EQU
5
1F
11
KONARDB DS
MONFLAG1 DS
KONFLAG1
1:11 i'isQI-
l!ONFLAG2 DS
1X
10
14
18
20
28
2C
30
70
EO
E8
BC
CO
C4
C8
CC
DO
D4
D8
DC
EQU
-i'aoe--
KONDVNQl!
MONDVLST
KONRSV1
MONAIOE
DS
DS
DS
DS
DS
:PS
DS
DS
DS
DS
DS
1H
1F
1F
1F
1F
1D
1D
1F
1F
16F
16F
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
8C
1F
1F
1F
~ONATRB
l!ONCLOCK
KONSUSCK
KONSUSCT
MONRSiD1
MONSAlE1
MONSAVE2
MONUSER
MON;5PLCT
MONSFB
MONCURV
MONNXTv
MONCURR
MONNXTR
MONDASA
MONDASB
KONDAS
MONEX
K*2
MONFLAG2
SUSPEND
Work byte
VK/370 monitor bas been suspended
iF
1F
1F
1F
1F
1F
ii*3
DS
Address of monitor tape real device block
Monitor flag
Flag used by user class routine
MONliOR STOP command has been issued
Tape rewind-unload CCW has been scheduled
Tape error has occurred -- step VK/370 menitor
Handling timer interruption
Handling the last tlock
Only one buffer for VM/370 menitoring
1'20'
X'10'
X'08'
X'04'
X'02'
X'01'
~it§ ggfi~ed i~
6
8
C
M*1
Numter of entries in real device list
Address of the real device list
Reserved for IBM use
Address of monitor tape l/C block
Address of monitor timer request block
TOD clock stamp for each record
TOD clock value at last suspension
Suspension count
Reserved for IBM use
Monitor internal save area fer main processor
8onitor internal save area for attached
precessor
User starting/stopping the V8/310 monitor
Number of records on spool file
Address of SFBLCK for spool file
Virtual address of first virtual buffer
Virtual address of secend virtual buffer
Real address of first virtual buffer
Real address of second virtual buffer
Address of next DASD buffer
Address of previous DASD buffer
Address of IASD buffer for tbe spocl file
Flag lyte
Spool file closed ty command
DD
l!ONFLAG3 DS
§it§ g~!1:!}~g
CLSUS
EQU
EXHAUST EQU
CL
EQU
SPOOLED EQU
8*4
1:11
Flag tyte
MONFLAG3
i'sO'X'40'
1'20'
1'10'
DE
EO
E4
E8
MONBUFNO
MONCURBF
MONCRSLT
KONIOBF
DS
DS
DS
DS
1H
1F
1F
1F
EC
FO
F4
F8
FC
100
KONIOSLT
MONSKLST
MONSACT
MONCHPTR
l!ONUTRB
KONBUF1
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
Suspend during close
Spool DASI slots exhausted
Suspension necessary
8onitor to spool active
Reserved for IBM use
Address of current V8/370 menitor buffer
Corresponding slot address
Address of 1M/370 monitor buffer going to
tape
Corresponding slot address
Address for device list seeks
Limit count for real time .enitor
Address of channel sampling data
Address of I/O utilization
First VM/37C monitor buffer address
Section 1. CP Data Areas and Centrel Blocks
57
MOBCOM
Hexadecimal
Displacement
104
Field
Bame
Field Description, Contents, Meaning
MOBBUF1V EQU
MOBBUF1+4
First buffer address of remaining
variable number of buffers. There
is one 4-tyte entry for each
monitor buffer. The last field
contains X'FFFFFFFF'
ftOBSIZB
(*-MOBCOM)/8
Size of DSECT in doutlewords
BQU
!lag§ !~ DftKSYSAT
AUTOGO
EQU----X' 80'
AUTOSPL BQU
X'40'
ftOBSLMT
BQU
ftOBBUFAV BQU
ftOBBUFAC BQU
X'20'
SISMON setting for AUTODISK cn
Stop monitor when spool file
record limit is reached
Sampling for real time Monitor
X'01'
X'03'
FIM in Byt~ 1 of ~uff~
of Buff~ !£!: .§pool
Not collecting; being used fer
output
Available fcr use
Current active collector
l1~it~! ~uffe!: Co~!!ol
TRAP
UBFIB
BQU
BQU
Fl~g !~ ~Egg!
SFBeOB
58
EQU
X'80'
X'40'
Flag in
Byt~ 1Q of Spool Buffer
Last buffer queued for I/O
Close occurred tefore the
buffer was full
File Control ]lock (~!BFL!G2)
l!onitor sFocl file ide-ntifier
--ii 01'
IBM VM/370 Data Areas and Centrol Block Logic
l!SSCOl!
MSSCOM contains information necessary to request a l!SS volume mount, request a MSS volume
demount, or ccmplete processing when a pack change interrupt is received on a l!SS device.
The MSSCOM tlocks are chained frcm location DaKS~SMQ in module D!KSSS.
r
HSSSER
0 I
I
8 I////////MSSRSRVD/////////I
I
MSSTASK2
10 I
I
18 I
MSSNEXT
I
HSSUSER (cont.)
20 I
Hexadecimal
Displacement
------------
Field
Name
8SSVUA
MSSTASK1
MSSTASK3
aSSUSEB
MSSFLAGS
Field Description, Contents, Meaning
0
MSSSER
DS
CL6
6
8
C
MSSVUA
DS
MSSRSRVD DS
HSSTASK1 DS
XL2
1F
1F
10
MSSTASK2 DS
1F
14
MSSTASK3 DS
1F
18
1C
MSSNEXT
MSSUSER
DS
DS
1F
CLS
24
MSSFLAGS DS
X12
Volume serial number of the l!SS volume
to te mounted or demounted
Device address for the volume
Beserved for IBl! use
Pointer to a CPEXBLOK for a pending
MS~ pack change interrupt
Pointer to a CPEXBLOK for a pending
MSC return on mount or demount
Pointer to a CPEXBLOK for an I/C
request to a volume being mounted
Next entry in the chain, or zere
Name of the virtual aachine that
requires the ~SS activity
Einary flags representing the
status of the request
MSSERR
in MSSFLAGS
EQU -X'8000'EQU
X'2000'
EQU
X'400'
RQENT
EQU
X'SO'
MQENT
EQU
X'40'
INPROC
aSGPROC
EQU
EQU
X'20'
X'10'
MSSSIZE
EQU
(*-MSSSER)/8 asscoa size in doublewords
~i!§ g~!!!!~g
MOUNT
DEMOUl~T
Mount volume aSSSER on address HSSVUA
Demount MSSSER from MSSVUA
The l!SC detected an error while
attempting the requested action
This request is waiting to be passed
to the l!SC
This request has been passed to the
l!SC, and is awaiting a pack change
interrupt
This request being processed by the l!SC
The esc has completed for this request
and message DMKSSS0881 is being sent
Section 1. CP Data Areas and centrel Elocks
59
NCPTBL
NCPTBL entries provide description information en
Cp-owned volumes.
0
NCPSIZE
NCPVOL
18
------------
1*1
NCPPAGCT
NCPSTART
Field
lame
I
I
1//U*2///1
I
I
Field Description, Contents,
0
4
8
10
NCPPNT
NCPSIZE
NCPIAftE
NCPVOL
DS
DS
DS
DS
lF
CL8
CL6
16
NCPFLAG
DS
lX
IF
~eaning
Displacement to next entry
370x storage size required for load
Control program reference name
Volume identification of DASt containing
saved image
N*l CPTYPE flag hyte
!!it§ g~!i~g !1! !~.fFLAG
NCPTNCP EQU
X'Ol'
NCPTCEP EQU
X'02'
NCPTPEP EQU
X'03'
Netwcrk Control Program
270x Emulation Control Prograa
Partitioned Emulation prograa
NCPRSV1 DS
NCPSTART DS
1X
18
lC
NCPPAGCT DS
IF
Res~r~ed f6t 1~~ use
Pointer to first page (CCPt) cn HCPveL of
saved NCP
Total number of pages saved
NCPSIZE
(*-NCPSIZE)/8
NCPTEL size in doutlewords (X'04')
17
60
!
I
NCPNAftE
10
saved en
I
ICPPIT
8
Hexadecimal
Displacement
370x control program images
EQU
N*2
IF
IBft VM/370 Data Areas and Control Block Logic
NICBLOK
NICBLOK contains control
lines, and display screen
NICBLOK.
information related to 3704/3705 resources, teleprocessing
status information. The RDEVNICL field of RDEVELOK Foints to
o
NICNAME
NICEPAD
8
NICRCNT
NICVRID
10
o
2
4
Field
Name
N*4
NICQPNT
NICNAME
NICEPAD
NICSTAT
Field Description, Contents,
DS
DS
DS
1H
1H
1X
NICFLAG
DS
1X
!!!i§ g~f!~g in NICFLAG
NICSESN EQU --X'80'NICATTN EQU
X'40'
NICPSUP EQU
X'20'
NICATOF EQU
X'10'
NICENAB EQU
X'08'
NICDISB EQU
X'02'
NICMTA
EQU
X'01'
NICFMT
EQU
X'80'
NICDIAG EQU
X'40'
NICALRM EQU
X'10'
NICCARD EQU
X'04'
NICPROCN EQU
X'01'
6
7
N*3 I
NICDSP
!!!i§ g~f!neg in NICSTAT
NICERLK EQU --X'80'NICNTRL EQU
X'40'
NICDISA EQU
X'20'
NICSWEP EQU
X'10'
NICEPMD EQU
X'08'
NICLTRC EQU
X'02'
NICDED
EQU
X'01'
EQU
NICTRQ
X'80'
NICHOLD EQU
X'10'
NICMORE EQU
X'08'
NICRUNN EQU
X'04'
NICRE!D EQU
1'02'
NICCPNA EQU
X'01'
5
N*2 I
NICTlUT
NICUSER
18
Hexadecimal
Displacement
N*1 I
NICLLEN
NICTYPE
DS
DS
1X
1X
!!it§ g~f!~g in NICTYPE
NICCTLR EQU --X'OO'NICLINE EQU
X'80'
NICTERM EQU
X'40'
NICLGRP EQU
X'20'
~eaning
370x NCP resource name
Subchannel address when in EP mode
N*1 Resource status flags
Device error lock is set
Control operation is active
Resource inactive (offline)
Resource is switchable to EP mode
Resource now in emulator mode
NCP line trace active
Resource is dedicated
Graphic device - timer request Fending
Graphic device - screen full; in HOLD status
Graphic device - screen full; in MORE status
Graphic device - screen in running status
Graphic device - read pending fer screen input
Graphic device - last input not accepted
N*2 Interface control flags
Session is active for this device
Attention handling in progress
Resource has print suppress feature
Suppress attention signal character
Resource is active and enabled
Resource to be disabled as soon as possible
Multiple terminal access resource
Graphic device - screen formatted VM/370 online
Graphic device - screen written with DIAGNOSE
Graphic device - screen has an alarm message
Graphic device - data from card reader
Graphic device - process centrol task now
N*3 Terminal output line length
N*4 Resource type and/or features
Resource
Resource
Resource
Resource
is
is
is
is
the 370x
a teleprocessing line
a terminal device
a logical line group
Section 1. CP Data Areas and Control Blocks
61
NICBLOK
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
------------
!!.!1§ g~f!1!~g in NICTYPE (cont.)
X'08'--LINE - Synchronous data link control
NICSDLC EQU
NICLBSC EQU
X'04'
LINE - Binary synchronous line control
NICSWCH EQU
X'02'
LINE - Switched line interface
NICMLTP EQU
X'01'
LINE - Multiple-drop leased line
NICTELE EQU
X'10'
TERM - Telegraph line adapter
NICCIBM EQU
X'08'
TERM - Selectric-based terminal
NICRCPU EQU
X'04'
TERM - Bisynch remote computer
NICRSPL EQU
X'02'
TERM - Bisynch remote spool device
NICGRAF EQU
X'01'
TERM - Bisynch remote graphics
NIC3271 EQU
X'08'
Graphic device - 3271 control unit
NIC3275 EQU
X'04'
Graphic device - 3275 standalone display
station
NICOPRDR EQU
X'10'
Graphic device - card reader feature
8
A
C
10
14
18
NICRCNT
NICVRID
NICTMAT
NICUSER
NICQPNT
NICDSP
1H
1H
1F
1F
1F
1D
DS
DS
DS
DS
DS
DS
Retry count for BTO errors
Virtual resource ID when dedicated
TOD clock value when attached
VMBLeK address of associated user
Pointer to input BTU chain
Remote 3270 information
ORG NICDSP
1X
NICRSV1 DS
NICDTYPE DS
1X
~!1§ g~fi~ !~
NICD3277 EQU
NICD3275 EQU
NICDTYPE
1'04'--X'02'
3277 display station
3275 display station
NICMDL
NICRSV2
NICRSV3
DS
DS
DS
1X
1X
1X
Display station model
Reserved for IBM use
Reserved for IBM use
NICSIZE
EQO
(*-NICBLOK)/8
Size of block in doublewords (X'03')
Q~ic~ Q~£gDQ~~1 ~2!2
2
3
Reserved for IBM use
Display station type
NICCORD
NICTMCD
127Q
-
ORG NICEPAD
DS
1X
DS
1X
~~ ~!1!2II ~1!chronQ~ Li~~§
Current line coordinates
Terminal mode
~it§ Q~!.!neQ
8
A
C
NICTABF
NICSIO
NICAPL
NICTEXT
in NICTMCD
EQU - X ' 8 0 ' EQU
X'40'
EQO
X'20'
EQO
X'10'
Second scan of screen's input area
DIAGNOSE issued to input area
APL cn for 3270 remote
Text feature on for 3270 remote
NICSELT
NICPOLL
NICATRB
ORG NICRCNT
DS
18
DS
1H
DS
1F
Remote station selection characters
Remote station polling characters
Timer request block address
~gJ!at~ ~lmb~!§ f~!
WRITBRK
RDBOFLN
RDBUFNO
EQU
EQU
EQO
~~se ~.!!§
IPLREQ
ABORT
62
EQU
EQU
VML37.Q
X'09'
96
6
(§~D~ ~1!~
X'02'
X'01'
of !.!!~ l1 0x
Write break CCW operation code
Length of host read buffers
Numher of host read buffers
~Y.EEQ!!
Q) Peculiar to the 370x
----IPL-required==3705 inactive
Buffer depletion--transfer terminated
IBM VM/370 Data Areas and Control Block Logic
NPRTEL
NPRTBL lists
saved image.
by naae all
o
pages saved and
NPRVOL
18
o
10
16
17
18
lC
contains the
lIPRNI!!E
10
4
8
DASD volume that
NPRRSV1
NPRPNT
8
Hexadecimal
Displacement
indicates the
N*l
N*2
NPRPIGCT
NPRSTART
Field
Name
Field Description, contents, Meaning
NPRPNT
NPRRSV1
NPRNAME
NPRVOL
DS
DS
DS
DS
NPRCNT
NPRRSV2
NPRSTART
NPRPAGCT
DS
DS
DS
DS
1F
1F
C18
CL6
1X
1X
1F
1F
N*l
N*2
Chain pointer to next entry
Reserved for IBM use
Reference name for image library
Volume of DISD containing the
saved image
Number of 3800s active on this image
Reserved for IBM use
CCPI of first page on NPRVCL
Number of pages saved
Section 1. CP Data Areas and Control Blocks
63
OERRECN (Long OBR)
OERRECN provides error, sense, and other statistical data needed for errcr recording on a
specified channel-attached I/O device.
o
I
OBRKEYN
OBRSWSN
1/IIIIIIIIIOBRSPE1/1//I//I//'
OBRDTEN
8
OER'IMEN
10
OBRCPIDN
18
OERPGMN
20
OERFCCWN
28
OERCSWN
30
OBRCUAIN
S*1
38
OBRCUAPR
40
Hexadeci.al
Displacement
------------
OERtEVTN
OERIORTY
CBRSNSCT
Device Dependent rata
Field
Na.e
Field Description, Ccntents, Meaning
l~-~1~ !!~g~! ~££rd
0
OBRKEYN
OBRSiSN
2
Byte
Bits defined ill
'0--------OBRMORE
OBRTOD
Byte
4
8
C
10
18
20
28
30
31
64
1H
1H
DS
DS
BQU
BQU
Bits defined in
"1------
Record type
Switches
Q!U~SWSN
X'80'
X'40'
More records to follow
TOD clock instruction issued
Q~RSWSN
OBREOD
OBRTBMP
OBRSHOBR
OBRDEMNT
EQU
BQU
EQU
BQU
X'80'
1'40'
X'20'
X'04'
SDR counters dumped at ECD
Temporary error
Short record
Volume demounted
OBRSPE1
OBRDTEN
OBRTMEN
OBRCPIDN
DS
DS
DS
DS
1F
1F
1F
2F
Reserved for IBM use
Date
Tille
Processor identifier and serial number
OBRHSIZE EQU
(*-CBRRECN)
Size of OER header
OBRPGMN
OBRFCCWN
OBRCSWN
OBRDDCNT
OBRCUAIN
2F
2F
2F
11
3C
DS
DS
DS
DS
DS
Job identification
Failing CCli
Failing CSW
S*1 Number of doublewords in record
Address of failing device
IEM VM/370 Data Areas and Control Elock Logic
CEBRFCN (Long OER)
Hexadecimal
Displacement
-------------34
38
39
3C
3E
Field
Name
OBRDEVTN
OBRSDRCT
OBRCUAPR
OBRIORTY
OBRSNSCT
Field Descripticn, Contents, Meaning
DS
DS
DS
DS
DS
OBR1SIZE EQU
40
48
50
All DASD
OBRVOLN
OBRLSKN
OBRHID
1F
1X
3C
2X
2X
(*-OBRRECN)
Units
DS
ac
DS
ax
ax
DS
~Jj4/2112 !~!!at
58
62
--------------------------------------
Device type
S*2 Number of SIR work area bytes
primary unit address
Number of retries
Number of sense bytes
Size of long OBR record base
voluae identification
Last seek address
Home address
OBRSDRiK DS
OBRSENSN DS
101
6C
SDR work area
Sense data
OBR2SIZE EQU
(*-OBRRECN)
Maximum size of 2314/2319 reccrd
J35QL1J~QLllJQL23Q~ For!!~!
58
ORG
OBR33SNS DS
OBRSDRWK
24C
3350/3340/3330/2305 sense data
OBR3SIZE EQU
(*-OBRRECN)
Maximum size of 3330/3340/2305 record
yni!
40
4A
R~£g!g IgE!!~!
ORG
OBRURST DS
OBRURSNS DS
OBRVOLN
101
1C
SDR work area
Unit record sense data
150.2L1.2~.2
40
lQilat
ORG
OBRVOLN
OBR3505S DS
1C
3505/3525 sense data
40
41
48
52
J20J !grmat
ORG
OBRCORRL DS
DS
OBRSDR03 DS
OBR3203S DS
OBRVOLN
11
71
101
24C
Correlation number
Reserved for IBM use
SDR work area
3203 sense data
40
41
48
52
J21j 12!1!~!
ORG
OBRCORL DS
DS
OBRSDR32 DS
OBR3211S DS
OBRVOLN
11
71
10X
6C
Correlation number
Reserved for IBM use
SDR work area
3211 sense data
~400 TaE~
48
52
19rma!
ORG
OBRLSKN
OBRTAPST DS
101
OBRTAPSN DS
24C
J42QLJ~jQ %gE~
48
58
6C
ORG
OBRDVDEP DS
OBR342ST DS
OBR3420S DS
!.2.!.!at
OBRLSKN
16C
201
24C
SDR work area
'rape sense data
Device dependent data
SDR work area
3420 sense data
Section 1. CP Data Areas and Ccntrol Blocks
65
OERREC (Short OBR)
OERRECN provides error, sense, and other statistical data needed for error recording on a
sFecified channel-attached 1/0 device.
18
20
I
OBRDEVSH
I 0*1
OBRCUA
I
-----------------------------------------------------1
OBRSDRIN
I
I
I
I II/IIIIIIIOBR SV1 1111/111111 I
I
30
I
L
Hexadecimal
tisplacement
Field
Name
!9!~:
18
1C
Field Description, Contents, fteaning
The 24-byte Header Record for the Short OER is identical tc
that of the Long OER, the description of which precedes this block.
OBRDEVSH DS
OBRSDRSH DS
OBRSIZE
EQU
(*-OBRRECN)
0*1
£evice type
Number of SIR work area bytes
Size of short OBR record base
OBRSIZE 1 EQU
f*-OBR-R-ECN+1-) 18 Si-ze in doutlevords (X'04')
1D
20
OBRCUA
DS
OBRSDRIN DS
3X
20X
Channel and unit address
SDR work area
20
2A
ORG
OBRSSDR 1 DS
OBRSSDR2 DS
OBRSDRIN
10X
10X
SDR work area
SDR work area
34
OBRSV1
DS
OBRSIZE2 EQU
66
1F
1X
1F
Reserved for IBft use
(*-OERRECN+7)/8 Size in doutlewcrds (X'07')
IBM VM/370 Data Areas and Control Block Logic
CiNDLIST. PAGTIELE
OiNDLIST contains a list of all the system owned DAsr volumes that are used for paging,
sFooling, and temporary disk storage activity.
Each entry specifies the vclume identity
and its preferred use (that is. paging/spoolin9/~-disk space). This block is generated
by the SYSOiN macro at system generation.
o
OWNDVSER
Field
Naae
Bexadeciaal
tisplacement
="'-----------
CWNDRDEV
Field Description, Contents, fteaning
0
OiHDVSER DS
C16
6
OWNDRDEV DS
1H
Volu.e serial number
Displacement of RDEVBLOK fer the volume
6
ORG
OiNDPREF DS
OWNDRDEV
1H
Allocation preference
PAGTABLE is used by CP for allocating and referencing storage. It is referenced by the
segment table (SEGTABLE) data area and contains a pointer to the swaF table (SWPTABLE)
which~ in
turn, is related to a DASD cylinder location. The SWPPAG field of SWFTAELE
points to PAGTABLE.
-8
PIGSTMP
o
PAGSHR
8
Eexadecimal
Displacement
------------
Field
Name
Field Description, Contents, fteaning
§-~n~ !!~g£~
DS
DS
1F
1H
-2
PAGTOT
DS
1H
0
PAGSHR
PAGSWP
DS
DS
1F
1F
4
PAGSWP
PAGCORE
PAGSTMP
PIGACT
-8
-4
PAG'lOT
PIGACT
Page table time stamp
Count of active segment tahle entries
for this segment
Count of total segment table entries
for this segment
Pointer to NAME table (SBRTAELE)
Pointer to swap tatle (SiP'lAELE)
Section 1. CP Data Areas and Control Blocks
61
PAGTABLE, PGBLOK
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
PAGCORE
8
DS
1H
Real page address (start of page table fer
hardware)
PAGTJELE entry invalid
page has teen referenced
prg~! E.!!E~!!
PAGBMP
for ~hared Seg!ents
(PAGCORE-PAGSTMP.16*L'PAGCCBE)
length of a full 16 entry page table
(PAGiSWP+(SiPFLAG-SWPVM)+16*
(SWPCOtE-SWPFLAG.1).8) length of
a contiguous page and swap table
EQU
PGBLOK is used by VM/VS Handshaking_
The tlock is created and stacked when a
multiprogramming or multitasking VS1 program interropt occurs when a referenced page is
net available in storage. The VMPGPNT field in the VMELOK points to PGELCK.
o
PGPNT
Hexadecimal
Displacement
Field
Name
0
PGPNT
PGADDR
DS
DS
PGESIZE
EQU
-----------4
68
PGADDR
Field Description, Contents, Meaning
1F
1F
(*-PGELOK+7)/8
Pointer to next page tlock cn the stack
Virtual page fault address
PGELCK size in doutlewords (X'01')
IBM VM/370 Data Areas and Control Elock Logic
PSA
PSA is the primary control block for controlling CP and virtual machine activity. This
centrol blcck centains the normal low core 1PL, logout, and PSi infermation; the
processor medel and type and features of the prccessor; and save areas used by EALR and
FREE. This bleck also contains monitor and trace data and the necessary linkages to
virtual machines, real devices, and spool files.
Note: All fields reside in real PSA unless otherwise specified.
Fields residing in
atsolute PSI are specifically identified. For uniprocessor operation, real PSA equals
absolute PSA (or 0). If the system was running in AF mode when a catastroFhic errcr
occurred, the Attached Processor will no longer be running. System recovery is in
uniprocessor mode and the real PSA will no longer be zero.
Page 0, Machine Usage
r
O!
,
IPLP Si
IPLCCi 1
I
1-----------------------------------1
101
IPLCCi2
EIOPSi
I
I
1
201
SVCOPSi
PROPSW
I
I
I
301
MCOPSi
IOOPSi
I
I
I
401
CSi
CAW
IQUANTUMR
1-------------------
501
TIMER
IQUANTUM
EINPSW
1-----------------------------------SVCNPSW
PRNPSW
601
1-------------------------MCNPSi
IONPSi
701
1-------------------------CPULOG
801
1------------------------------FIDLOG
1001
i------------------------FPRLOG
1601
1-------------------------------GPRLOG
1801
1-----------------------------------CRLOG
1COI
1----------------------------TEMPSAVE
,
I
31CICPlD
ICPABEND
IF*3 IP*4 I ASISV!!
I
38CIARSPPR
I
39C AR10PR
IARSPPU
IARSFRD
IAR10RD
IF*5 If*6 IARSPAC
3AC AVMREAL
IASYSABND IASYSLC
I ASYSOP
3fC ARlOC'I
IAR10CH
IARICCU
IARICDV
3CC ARIOCC
IARIOUC
IARleDC
I ACORETEL
3DC APAGCF
ICPCREGO
ICFCREG6
ICPCREG8
IARICPU
3EC TlMEDISP IASVCLIST I AV!!1LIST ILASTUSER
3FCIPAGECUR I MONNEIT IFAGENt
IPAGENIT
I
4CCITRACEFLG ITTSEGCNT 1//////1///////////
i
1/////11111111111/1
1/////////I///I///PSARSV15/////////////
1-------------------------------
430lINSTiRD1 IINSTiRD2 IINSTiRD3 IINSTiRD41
I
I
44C I
Constants Feol
I
2001
1----------------------------------BALRSAVE
2401
1----------------------------FREESAVE
2801
1-----------------------------------FREEWORK
2COI
1----------------------------DATE
TODATE
1-------------------------------STARTIME
CPUID
3001
2FOI
I
4tC I APTRLK
I
4ECIIPAGNUM
1
4FCIAQCNi'I
I
50ct
INOADD
II4CFFS
IIRIGHT16 IAFREE
IADSPCH
IAFTRAN
DUMPSAVE
I
IIRIGBT241
I
IAFRET
I
1
II2048ENti
I
I
I----~-----------------------------
3101
lDLEilIT
PAGEiAlT
I--------~-------------------------
3201
IONTilIT
PROBTII1E
1------------------------------RUNPSi
IRUNUSER IDSPLPSi
1------------------------------340lRUNCRO
IRUNCR1
ICPSTAT
ICPRESTRT
1--------------------------------350lPGREAD
IPGiRITE
PGiAITIM
t
1-----------------------------------SlGSAVE
5401
3301
1-----------------------------------LCKSAVE
58CI
I
I
3601////PGiAlTPG///////IPSASVCCT IP*1 IP*21
Section 1. CP Data Areas and Centrel Blocks
69
PSA
,
,
MFASAVE
5COI
I
6fCI
CHGREGS
I/I///RESERVED///III
1-------------------------------------1
6COI UNSHRVM IP*10IP*11111///RESERVED/////1
1-------------------------------------SiTHSAVE
6001
1-------------------------------------LOCKSAV
1-------------------------------------SVCREGS
6501
6401
1-----------------6601 PREFIXA I PREFIXBI
I
1
6DCI STACKVM IUNSHRVM2 IADMKCFE IRESERVEt/1
1
1
6EOI/////////I/RESERVED (cont)////////////I
6FC
70C
71C
-------------------------------------1
ALOKUM IRESERVE I ALCKSF I IEXTSP 1
-------------------------------------1
ITMRSN I////I/I/I/RESERVED//////////I
-------------------------------------1
MCNREGS
I
I
PSACPXBFI//RESVD//
1--------------------------------------1I
6701
iAITSTRT
iAITEND
1
6S01 PiTPAGESIACTIVTRQI EMSPEND 1 EMSREC
1
1
I
I
6901 XCPEND IP*7IP*8 IP*91
AFSTATUS
I
I
I
6AOIL -AMCHAREAISHRLKCNTI
-___________________________________
PROBSTRT
__I
Hexadecimal
tisplacement
Field
Name
8
ORG
RSRTNPSi DS
RSRTOPSi DS
IPLPSW
1D
1D
Restart new PSi
Restart old PSi
IPLCCi1
IPLCCi2
1D
1D
IPL CCi
IPL CCi
DS
DS
IPLCCi1
1F
1F
10
TRACEND
DS
1F
14
TRACCURR DS
1F
18
20
28
30
38
40
48
4C
50
54
58
60
EXOPSi
SVCOPSi
PROPSi
MCOPSi
IOOPSi
CSi
CAi
QUANTUMR
TIMER
QUANTUM
EXNPSW
SVCNPSi
PRNPSi
MCNPSi
IONPSi
1D
1D
1D
1D
1D
1D
1F
1F
1F
1F
1D
1D
1D
1D
1D
C
68
70
78
70
IPL start PSi
ORG
PSARSV3 DS
TRACSTRT DS
8
LOKSAVE2
Field Description, Contents, Meaning
o
10
7SC
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
Reserved for IBM use
Address of start of trace table.
Note that TRACSTRT is in absolute PSA
Address of end of trace table.
Note that TRICEND is in absolute PSI
Address of next available trace table entry.
Note that TRACCURR is in absolute PSA
External old PSi
SVC old PSi
Program old PSi
Machine check old PSi
1/0 cld PSi
Channel status word
Channel address word
Interval timer value at last interruFt
13-microsecond interval timer
Interval timer value at last disFatch
External new PSi
SVC new PSi
Program new PSW
Machine check new PSi
I/O new PSi
IBM VM/370 Data Areas and Control Block Logic
1?SI
Hexadecimal
Displacement
80
80
84
Field
Name
CPULOG
INTEXF
Field Description, Contents, Meaning
DS
16D
ORG
CPULOG
DS
1F
DS
lF
INTSVCL
INTSVC
INTPRL
INTPR
TREXADD
MONCLASS
PERCODE
PER ADD
MONCODE
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
CHANID
DS
IOELPNTR DS
ECSWLOG DS
DS
INTKFLIN DS
lH
lH
lB
lB
lF
1H
lB
IF
IF
lD
IF
1F
IF
1F
1F
SVC instruction length code (ILC)
SVC interrupt code
Program instruction length code (ILC)
program interrupt code
Translation exception address
Moniter class
PER code to be reflected
Address of instruction causing PER interruFt
Monitor code
Reserved for IBM use
Channel It
I/O extended logout (IOEL) Feinter
Limited channel logout (ECSW)
Reserved for IBM use
I/O interrupt key, flags, and interface
address
I/O interrupt device address (halfword)
EA
BC
E8
FO
F4
Reserved for IBn use
External interrupt code (fullword)
External interrupt code (half word)
86
88
8A
8C
8E
90
94
96
98
9C
AO
A8
AC
BO
B4
B8
Processor and storage logout area
INTMC
INTRC
DS
DS
DS
DS
11F
1D
IF
1X
F5
DS
F8
FC
FAILSTAD DS
REGNCODE DS
IF
1F
100
160
FXDLOG
FPRLOG
12D
4D
.. nn
GRLOG
DS
16F
lCO
200
CRLOG
CPU SAGE
DS
DS
16F
OB
Fixed logout area
Floating-point register log cut area
General register logout area
Control register logout area
End cf machine usage; start ef C1? usage
200
ORG
TEMPSAVE DS
CPU SAGE
16F
Temporary save area
IOV
200
204
208
20C
210
214
218
21C
220
224
228
22C
230
234
238
23C
TEMPRO
TEMPR1
TEMPR2
TEMPR3
TEMPR4
TEMPR5
TEMPR6
TEMPR7
TEMPR8
TEMPR9
TEMPR10
TEMPR 11
TEMPR12
TEMPR13
TEMPR14
TEMPR15
DS
DS
Reserved for IBM use
Machine check interrupt code
Reserved for IBM use
External damage reason code
Reserved for IBM use
Failing storage address
Regien code
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
TEM1?SAVE
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
Registers 0-15
Sectien 1. CP Data Areas and Centrel Blecks
71
PSA
Hexadecimal
Displacement
Field Description, Contents,
16F
EALR linkage save area
BALRSAVE
1F
1F
Registers 0-15
~eaning
240
BALRSAVE DS
240
244
24C
250
254
258
25C
260
264
268
26C
270
274
278
27C
BALRO
BALR1
BALR2
BALR3
BALR4
BALR5
BALR6
BALR7
BALR8
BALR9
BALR10
BALR11
BALR12
BALR13
BALR14
BALR15
280
FREESAVE DS
280
284
288
28C
290
294
298
29C
2AO
2A4
2A8
2AC
2BO
2B4
2B8
2BC
FREERO
FREER1
FREER2
FREER3
FREER4
PREER5
FREER6
FREER7
FREER8
FREER9
FREER10
FREER 11
FREER12
FREER13
FREER14
FREER15
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
FREESAVE
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
2CO
2FO
2F8
300
308
FREEiORK
DATE
TODATE
STARTIME
CPOID
DS
DS
DS
DS
DS
12F
CL8
1D
1D
1D
tMKFRE work area
Date - mm/dd/yy - edited BECDlC
TOD clock at hh.mm.ss today - local time
Date and time started - TOt clock value
Processor identification field
308
309
30C
30E
CPOVERSN
CPUSER
CPO MODEL
CPOMCELL
ORG
DS
DS
DS
DS
CPOlD
1X
3X
2X
1H
Version code
Processor serial numler - ~acked unsigned
Processor model number
Maximum length in lytes of MCEL
310
318
320
328
330
338
33C
340
344
IDLEiAIT
PAGEiAIT
IONTiAIT
PROBTIME
RUNPSi
RUNOSER
DSPLPSi
RONCRO
RUNCR1
DC
DC
DC
DC
DS
DS
DS
DS
DS
X'7FFFFFFFFFFFFOOO' iotal system idle wait time
X'7FFFFFFFFFFFFOOO' iotal system page wait time
X'7FFFFFFFFFFFFOOO' Total system I/O wait time
X'7FFFFFFFFFFFFOOO' iotal system problem state time
1D
PSi last loaded by dispatcher
1F
Address of dispatched V!ELCK
1F
Load PSi instruction used to disFatch
1F
Control register 0 at dispatch
1F
Control register 1 at dispatch
248
72
Field
Name
ORG
DS
DS
DS
1F
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
16F
tMKFRE save area
Registers 0-15
IBM VM/370 Data Areas and Control Block Logic
PSA
Hexadecimal
tisplacellent
Field
Nalle
348
CPSTAT
348
ORG
CPSTATUS DS
------------
Field Description, Contents, l!eaning
DS
--------------------------------------
1F
CP running status
CPSTIT
1X
CP running status
in CPSTATOS
EQO -X'80'-EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'OS'
~it§ g~!i1!~g
CPiAIT
CPRUB
CPEX
CPFVRUN
CPSUPER
349
XTNDLOCK DC
1X
34A
CPSTAT2
1X
34B
DC
CP in wait state
CP running user in RUNOSBR
CP executing stacked request
Reserved for IBM use
Processor is executing in supervisor state
System extending free storage if it is
equal to IlPF'. Note that XTNDLOCK is 1D
absolute FSa.
Flag byte
!!i!§ g~!i1!gg in CPSTAT2
CP1UCAVL EQU --X'80'-CPIUCON EQU
X'40'
CPSBRLK EQU
X'20'
CPASTAVL EQU
X'OS'
CPASTON EQU
X'04'
Virtual machine assist available on processor
Virtual machine assist is cn for system
CP processing shared named system page
CP assist available on processor
CP assist is on for system
CPSTAT3
Wait time accounting flag
DS
1X
!!i!§ g~!!~g in CPSTAT3
CPT IDLE EQU --X'80'-CPTPAGE EQU
X'40'
CPTIOBT EQU
X'20'
Timer contains idle time
Timer contains page wait time
Timer contains I/O wait time
34C
CPRESTRT DS
1F
350
354
358
PGREAD
DS
PGWRlTE DS
PGWAlTIM DS
1F
1F
1D
360
368
36C
36E
PGWAlTPG
PSASVCCT
PAGELOAD
PAGERATE
DS
DS
DS
DS
1D
1F
1B
1B
370
370
PSENDCLR DS
CPID
DS
OF
1F
374
378
378
37A
37C
380
384
388
38C
390
394
398
39A
CPA BEND
PSTARTSV
SYSIPLDV
PGSRATlO
ASYSVM
ARSPPR
ARSPPU
ARSPRD
ARIOPU
ARIOPR
ARIORD
lPUADDR
PSAl!SS
1F
OF
1B
F*3
B'O'
P*4
V (D MKSYSVM)
V(DMKRSPPR)
V(D MKRSPPU)
V (DMKRSPRD)
V(D MKRIOPU)
V CD MKRlOPR)
V(D MKRlORD)
1B
P*5
1H
P*6
DS
DS
DS
DC
DC
DC
DC
DC
DC
DC
DC
DS
DS
P*1
P*2
Restart address if external interrupt marks
page invalid
Total numter of page reads
Total number of page writes
Time spent in page wait, multiplied by number
of pages waiting
Reserved for IB! use
Total number of user SVCs
Page wait percent, last measurement
Paging rate, pages per seccnd
Note that PAGERATE is in absolute PSA.
End of area cleared by D!KCFINT
CP running identifier. Note that CPID is
in absolute PSA.
CP abend code
Start of save/restored code
Device address of system lft device
Page steals/total replenished
Address of system V!BLCK
Address of system printer file chain.
Address of system punch file chain.
Address of system reader file chain.
Address of system punch table.
Address of system printer table.
Address of system reader table.
Instruction processing address
Address of !SS volume
The !SS is online and the !SS
communicator has been initialized
Section 1. CP Data Areas and Centrel Blocks
73
PSA
Hexadecimal
Displacement
39C
3AO
Field
Name
Field Description, Contents, Meaning
ARSPAC
AVMREAL
DC
DC
v (DMKRSPAC)
A (0)
3A4
3A8
3AC
3BO
3B4
3BS
3BC
3CO
3C4
3CS
3CC
3DO
3D4
3DS
3DC
3EO
3E4
3ES
ASYSABND DC
A (0)
ASYSLC
DC
ASYSOP
ARIOCT
ARIOCH
ARIOCU
ARIODV
ARIOCC
ARIOUC
ARIODC
ACORETBL
APAGCP
CPCREGO
CPCREG6
CPCREGS
TIMEDISP
ASVCLIST
AVMALIST
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DS
DC
DC
v (DMKSYSLC)
V (DMKSYSOP)
V (D MKRIOCT)
V (DMKRIOCH)
V (D MKRIOCU)
V (D MKRIODV)
V (D MKRIOCC)
V (DMKRIOUC)
V (DMKBIODC)
V (D MKSYSCS)
A(X'FFFFFF')
X'SOSOOSCO'
F'O'
F'O'
1F
V (D MKSVCNS)
V (DMKPRVMA)
3EC
3FO
LASTUSER DC
PAGECUR DS
V (DMKSYSVM)
1F
3F4
MONNEXT
DS
1F
3FS
PAGEND
DS
1F
3FC
PAGENXT
DS
1F
400
TRACEFLG DS
1F
400
ORG TRACEFLG
TRACFLG1 DS
1X
J1!!§
g~!!l!~Q in TRACFLG1
TRACOl
TRAC02
TRAC03
TRAC04
TRAC05
TRAC67
TRACOS
TRAC09
401
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
TRACFLG2 DS
--X'80'---
Address of system accounting chain
VMELCK address of virtual=real user. Note
that AVMREAL is maintained in both PSAs
Address of system abend Frinter
Address of SYSLCCS information
Address of system operator VMELCK
Address of real channel index table
Address of first RCHBLCK
Address of first RCUBLOK
Address of first RDEVBLCK
Address of count of real system channels
Address of count of real system control units
Address of count of real system devices
Address of system CORTABLE
Address of first pageable Frogra.
CP architecture control and external mask
CP assist and virtual machine assist mask
MONI!OR CALL enable mask
Timer displacement for charge
Address of CP assist pointer list
Address of expanded virtual machine assist
pointer list
Last user te be dispatched
Current monitor buffer page address.
Note that PAGECUR is in absolute PSA.
Next availatle address in .eniter buffer.
Note that MONNEXT is in abselute PSA.
Last address in current moniter buffer page.
Note that PAGEND is in absclute PSA.
Alternate '-cnitoi l:tiffer-page address.
Note that PAGENXT is in absclute PSI.
Trace table flags
Trace table flag
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
External interrupt tracing en
SVC interruFt tracing en
Program interrupt tracing CD
Machine check tracing on
I/O interruFt tracing en
FREE/FRET call tracing on
Enter dispatch tracing on
Queue drop tracing on
1X
Trace table flag
Bits defined in TRACFLG2
TRicOi---EQU --X'80'--TRACOC
TRACOD
TRACBEF
TRAC10
TRACll
TRAC12
TRAC13
74
EQU
EQU
EQO
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
Run user tracing on
Unstack I/O interrupt tracing on
Virtual CSW stored tracing en
SIO, !IO, and EDV tracing en
Unstack IOBLOK or TRQBLOK tracing on
Trace BTU activity for 370x NCP
Lock spin tracing active
Signal processor tracing active
402
TRACFLG3 DS
lH
Reserved for IBM use
404
TTSEGCNT DS
lF
40S
430
PSARSV15 DS
INSTWRD1 DC
5D
P'O'
count of total page/swap tables in system.
Note that TTSEGCNT is in absolute PSA.
Reserved for IBM use
Reserved for installation use
IBM VM/370 Data Areas and Control Block Logic
PSI
Hexadecimal
Displacement
434
438
43C
440
470
478
440
480
484
488
48C
490
494
498
49C
4AO
4A4
4A8
4AC
4BO
4B4
4B8
4BC
4CO
4C4
4C8
4CC
Field
Name
Field Description, Contents, Meaning
INSTWRD2 DC
INSTWRD3 DC
INSTWRD4 DC
bis! 2!
F7
F8
F9
F10
F15
F16
F20
F24
F60
F240
F255
F256
F409S
F4096
DC
DC
DC
EQO
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
6D'0'
8X'40'
8X'FF'
ZEROES
F'1'
F'2'
F 1 3'
F'4'
FIS'
F'6'
F'7'
F'8'
F'9'
F'10'
F' 15'
F' 16'
F'20'
F'24'
F'60'
F'240'
F'255'
F'256'
F'4095'
F'4096'
APTRLK
NOADD
X40FFS
XRIGHT24
XPAGNOM
XRIGHT16
AFREE
AFRET
AQCNWT
DC
DC
DC
DC
DC
DC
DC
DC
DC
V (D MKPTRLK)
X'PFOOOOOO'
X'40FFFFFF'
X'OOFFFFFF'
X'OOFFFOOO'
X'OeOOFFFF'
V (DMKFREE)
V (D l!KFRET)
V (DMKQCNWT)
4F4
iDSPCH
DC
4F8
4FC
APTRAN
DC
X2048BND DC
500
PSBCLR2
DS
OF
500
540
580
5CO
600
640
650
660
664
668
DUMPSAVE
SIGSAVE
LOKSAVE
BFASAVE
SWTHSAVE
LOCKSAV
SVCREGS
PREFIXA
PREFIXB
PSACPXBP
DS
DS
DS
DS
DS
DS
DS
DC
DC
16F
16F
16F
16F
16F
4F
4F
F'O'
F'O'
66C
670
678
680
684
RESVD
WAITSTRT
WAITEND
PiTPAGES
ACTIVTRQ
DS
DS
DS
DC
DC
4DO
4D4
4D8
4De
4EO
4E4
4E8
4EC
4FO
ZEROES
BLANKS
FFS
FO
F1
F2
F3
F4
F5
F'O'
F'O'
F'O'
F6
tc
V
(D~KDSPCHj
V (DMKPTRAN)
X'00FFF800'
A (0)
1F
D
D
F'O'
A (0)
Reserved for installation use
Reserved for installation use
Reserved for installaticn use
Also
-1
Also
= X'CCCCOOOF'
Also
Also
Also
Also
Also
Also
= X'COCCOOFO'
= X'CCCOOOFF'
X'CCC00100'
= X'CCCOOF!F'
= X'CCC01000'
X'CCC0003C'
C' 0'
Entry to lock a page in stcrage
Frequently used work value
Frequently used work value
Isolate right 24 bits
Isolate the page numrer
Isolate the right 16 bits
Entry to allocate free storage
Entry to release free storage
Entry to write a terminal message
Entry to the VM/370 dispatcher
Entry to the paging supervisor
Locate a half-page boundary
Start of second area cleared by CP
initialization (DMKCPI)
Save area for dump routine
Save area fer DMKEXT
DMKLCK save area
Save area for malfunction alert
DMKVMASW save area
LOCK macro save area
SVC save area
Prefix valUE of this processor
Prefix value of other prccessor
Address of CPEXBLOK for switcb SVC.
Note that PSACPXEP is in absolute PSA.
Reserved for IBM use
Timer value at start of wait
Timer value at end of wait
Pages in PGWAIT at start of wait
Address of active transit queue
Section 1. CP Data Areas and Control Blocks
75
PSA
Hexadecimal
Displacement
-----------688
68C
Field
Nalle
EftSPEND
Field Description, Contents, fteaning
DC
Emergency signal pending flags
F'O'
!t!!§ g~t~!.n~g in EftSPEND
EftSPQUI EQU --X'80'-EftSPEXT EQU
X'40'
EftSPSYNC EQU
X'20'
EftSPSHD EQU
X'10'
EftSPCLKC EQU
X'08'
EftSINQSC EQU
X'Ol'
Quiesce pending
Extend pending
Synchronization pending
Shutdown pending
Highcrder TOD synchronization pending
Processor is quiesced
EftSREC
Emergency signal received flags
DC
F'O'
Jlit§ g!!!!~g in EMSREC
E!SRQUI EQU -X'80'E1!SREXT EQU
X'40'
EftSRSYNC EQU
X'20'
EftSRSHD EQU
X'10'
EftSRCLKC EQU
X'08'
690
XCPEND
DC
Quiesce request received
Extend request received
Synchronization request received
Shutdown request received
High order TOD synchronization received
FlO'
External call pending flags
Jlit§ g~!!~g in XCPEND
XCAPR
EQU --X'8~
XCRES
EQU
X'40'
XCWAK
EQU
X'20'
XCDISP
EQU
X'10'
694
696
698
69A
IPUADDRX
LPUIDDR
LPUADDRX
APSTATUS
DC
DC
DC
DS
H'O'
H'O'
H'O'
6X
69A
APSTATl
ORG
DC
APSTATUS
X'OO'
Jlit§ g~!!.n~g in APSTATl
APUOPER EQU --X'80'-PROCIO
EQU
X'40'
APUNONLN EQU
X'20'
69B
P*7
P*8
P*9
Processor address of other Frocessor
Logical address of this processcr
Logical address of other prccessor
Attached processor status bytes
Attached processor status
ftPFEAT
CPINITD
EQU
EQU
X'10'
X'Ol'
Attached processor operational
Processor has I/O capability
System generated for attached processor mode
but running in uniprocessor mcde
ftultiprocessing feature is installed
System initialization complete
APSTAT2
DC
X'OO'
Second flag byte
Jlit§ g~!!.n~g in APSTAT2
CPftCHLK EQU
--x'"1o'--
CPPTLBR
76
Automatic processor recovery pending
Resume request pending
Wakeup request pending
Dispatch request pending
EQU
X'02'
69C
CPTERMLK DC
X'OO'
69D
CPFRELK
DC
X'OO'
69E
FRLKPROC DC
X'OO'
69F
CPFRESW
DC
X'OO'
6AO
6A4
AftCHAREA DC
SHRLKCNT DC
F'O'
F'O'
6A8
PROBSTRT DS
lD
Machine check processing pending
(for ECPS only)
PTLE required for processor
DMKMCT system termination is in progress.
Note that CPTERMLK is in absolute PSA.
Free storage extend pending.
Note that CPFRELK is in absOlute PSA.
Logical processor identification for CPFRELK.
Note that FRLKPROC is in absolute PSA.
DftKFRE must transfer execution to the
attached processor. Note that CPFRESW
is in absolute PSA.
Address of IMKMCH work area
Count of times CPSHRLK is set (used to clear
CPSHRLK)
Virtual machine time out queue at dispatch
IBM VM/370 Data Areas and Control Block Logic
PSI
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
6BO
6BS
6CO
CHGREGS DS
RESERVED DS
UNSHRV!! DC
2F
2F
Save area for charge synchronization
Reserved for IBM use
V!ELeK for pending D!KV!IPs call
(attached processor only)
1(0)
6C4
TRACPROC DC
X'OO'
6C5
APSTAT
DS
3X
Processor identifier for CF trace table
entries
Bore attached processor status flag bytes
6C5
APSTAT3
ORG
DC
APSTAT
X'OO'
Third attached processor status flag byte
P*10
Bits defined in APSTAT3
CPSYSLK--EQU --X'SO'
ORG
6C6
APSTAT4
DC
iPSTAT
X'OO'
Other processor is spinning en leck
P*11
llit§ g~i1led in APSTAT4
CPLOKFL EQU --X'8-0-'RECMODE EQU
X'40'
CP!CHSE EQU
X'20'
PROCSCHK EQU
CPAPRPND EQU
POFFLINE EQU
X'10'
X'08'
X'04'
RESERVE DS
STACKV! DC
UNSHRV!2 DC
1(0)
1(0)
6DC
AD!KCPE DC
RESERVED DS
PSECLR2 DS
V (D!KCPE)
5F
OF
6FO
6F4
6FS
6FA
700
70Q
710
750
ALOKV!
RESERVED
ALOKSP
AEXTSP
AT!RSN
RESERVED
!OBREGS
LOKSAVE2
DC
DC
DC
DC
DC
DC
DC
DC
V (D !KLOKV!)
1F
V (DMKLOKSP)
V (D!KEXTSP)
V (D!KT!RSN)
3F'0'
16F
16F
PSAEND
DS
OD
6C8
6DO
6D4
6D8
2F
Fourth attached processor status flag byte
DMKLeK enabled for external interrupts
Processor will record soft machine checks
!achine check processing pending (CP!CHSE is
the replacement of CP!CHIK in APSTIT2)
TOD synchronous check received
Automatic processor recovery Fending
Vary processor function in use
Reserved for IB! use
R11 for disFatcher unstacking
R2 value for pending VMAPs call
(attached processor only)
Address of t!KCPE for IPCS use
Reserved for IB! use
End of second area cleared by Cp
initialization (DMKCPI)
Entry to lock V!BLOK
Reserved for IB! use
Entry to spin on lock
Entry to signal processor routine
Entry to charge synchrcnizaticn routine
Reserved for IBM use
Register save area for Monitor call
Save area for switching to virtual
machine in DMKLOK
End of page 0 usage
Section 1. CP Data Areas and Contrel Blocks
77
PiDIBLOK
The PiDIBLOK is used to retain information
and AUTOLOG cemmands.
o
8
10
18
Hexadecimal
Displacement
-----------0
8
E
14
18
1C
1D
I
---------------------------------------------------1
PiDDATE
PiDTlftE
I
------------------------------------------------------1
PiDTIME (cont.)
PitTERftA
1
---------------------------------------------------1
PiDCBAIN
P*1 I P*2 IIIIRESERVED//III
Field
Nalle
PiDUSRID
PiDDATE
PiDTIME
PiDTERMA
PiDCBAIN
PWDINYCT
PiDFLAGS
PiDLOG
PWDALOG
78
with LOGeN
i
PiDUSRID
Field Description, Contents, fteaning
DS
DS
DS
DS
DS
DS
DS
CL8
CL6
CL8
CL4
F
1X
1X
in PiDFLAGS
EQU --X'8'O'-EQU
X'40'
~!!§ g~!!~~g
1E
about invalid passwords sUFFlied
DS
XL2
P*1
P*2
Userid attellpting LOGON or AUTOLOG
Date (Illlddyy)
Tille (hh:III1:SS)
Terminal address
Address of next PWDIELOK
Invalid password count
Flags
This block for LOGeN
This block for AUTOLCG
Bes~rved
IBM VM/370 Data Areas and Control Block Logic
for IBM use
Real I/O Control Blocks
In order to centrol the activity of the I/O
devices of the system and schedule I/O
requests uFon
them, I/O
control uses
several tYFes cf control blocks.
These
l:locks can l:e separated into two basic
types:
•
Static
blocks
that
describe
components of the I/O system.
the
•
Dynamic l:lccks that represent active and
pending requests for I/O operations.
The I/O cemponents of the real system
are described by one control block for each
channel, control unit, and device available
to the control program.
Units present but
not represented by control blocks are not
available for either
user-initiated or
centrol program-initiated operations.
REAL CHANNEL CONTROL BLOCKS
For each channel attached to the system
there exists a Real Channel Control Block
(RCHELOK) which contains:
•
The channel Fortion of
its attached units,
the address
of
•
Status flags indicating the
ayailability for scheduling.
•
A two-way queue anchor pointing to the
list of I/O requests waiting to use the
channel.
channel's
In additien, each RCHBLOK contains 32
halfword indexes, arranged in ascending
address
order,
that
represent
the
displacement into the Real Central Unit
table of the control blocks for the control
units attached to the channel.
The 32
entries are required because the control
unit address may be made up of five bits
from the unit address.
To locate the
control tlock for a given unit:
BEAL CONTROL UNIT BLCCKS
The Real Control Unit Table is composed of
Real Control Unit Blocks (RCUBLOK), one for
each control unit on the system.
These
blecks are similar to the RCHELOK in that
they contain the control unit portion of
the address and status flags, and a peinter
to a queue of I/O requests.
In addition,
the RCUBIOK contains a pointer te the
RCEELOK for the channel to which it is
attached. The RCOBLOK ccntains a table of
16 halfwerd entries that represent the
displacment into the Real Device Table of
its attached
devices.
This
table is
referenced in the same manner as the table
in the RCEBLOK.
REAL DEVICE CCNTROL BLCCKS
Each device and 3270 remote communications
line in the system is represented by a Real
tevice Control Block (REEVELCK), contains
the device portion of the unit address and
status flags similar to those in RCHBLCK
and RCUELCK.
There is alse a pointer fer
those operations that are waiting fer the
device to become available. Fields that
appear in the RDEVBLOK and not in the othe';c
blocks include a pointer te the I/O requeb~
that is currently active en the device, SIC
counts, and a pointer te error and sense
information.
The
RDEVELCK contains
a
pointer to the RCUELCK for the control unit
to which it is attached and fields of
device dependent information which do net
affect the operation of I/C control~
If the RDEVBLOK is associated with 3270
remote
communications line,
then
the
REEVELOK contains a pointer to NICBLCKs
that represents the resources on that line.
INPUT/OUTFUT BLOCKS
1.
Index into the table in the RCHBLOK a
displacement
equal to
twice
the
control unit address.
I/O requests that are active in the system
are represented ~y
Input/Output Elocks
(ICELOK) •
There 1S one ICELOK for each
operation (that is, channel program) to te
executed. The IOBLOK is ccnstructed by the
requesting
task
and
contains
such
information as:
2.
Load the index value.
•
The identity of the requestor
3.
Add the value to the base address of
the Real Control Unit Table.
•
The address of the channel program to be
executed
Section 1. CP Data Areas and Centrel Elocks
79
The address to which centrol is to be
returned
upon
coapletion
of
the
operation
In addition, the IOBLOK contains status
flags that indicate the current state of
the operation
(such as, whether or not an
error has occurred, if an errcr recovery
~rocedure
(ERP) is in control~ and the
condition returned fro. the 510)
and the
CSW associated with the interrupt that
signals the end of the operation.
Since
IOBLOKS are queued off various I/O control
tlocks, they also
contain forward and
backward queue pOinters. DMKIOS builds in
thea the real device address of the unit on
which the operation is started.
In general, the IOBLOK representing a
given operation progresses
through the
system by being queued, in turn, from
device, control unit, and channel blocks
until a path is at last free to the device.
A 510 is then issued. After the operation
is complete, the IOBLOK is dequeued fro.
the RDEVBLOK
and stacked on
a queue
maintained in the dispatcher, D!KDSP. Each
tiae the dispatcher is entered, the entries
on the queue are unstacked and control is
80
passed to the point
sFecified in the
Interrupt Return Address (IOEIBA).
After
I/e contrel stacks the ICELCK for the given
task, it attempts to restart all of the
components that have been freed by the
completion of the operation.
NEiWOBK INTERFACE CONTBOL fLOCK
There is one Network Interface Centrol
Elock (NICBLOK)
for each defined 370% and
each
resource
attached
to
a
3270
bisynchronous line.
The NICELOK provides
the correspondence between the line or
device address and the Fhysical resource
connected to that line.
This block not
only defines the identity of the terminal
type, line, or control unit but it also
contains flags
and status
information
pertaining to
that resource.
If the
defined
resource
is
a
remote
3270
component, the NICELOK ccntains the current
line coordinates l
polling and selection
characters information as veIl.
The remainder of this secticn describes
the real I/O control blocks.
IBM VM/370 Data Areas and Control Block Logic
RCHELCK
RCHBlOK contains status and tYFe information for the sFecified channel.
The linkage to
I/O tasks oFerated on by that channel and to the contrel units attached tc that channel
is also maintained.
The ARIOCH field of the P~A points to the first RCHELOK, which is
generated in contiguous storage.
o
~-------------------------------------------------------,
R*1
RCHFIOB
8
10
I RCHlOCK
RCHADD
BCHQCNT
RCHLICB
RCHSTIDC
R*3 I R*4 I R*5 I R*6
18
R*2
RCHRSTQ
RCHOPER
20
RCHCUTBL
(Variable Length)
Hexadecimal
tisplacement
-----------0
2
4
Field
Name
BCHADD
RCHlOCK
RCHSTIT
Field Description, Contents, Meaning
DS
1)S
DS
1H
1H
1X
R*1
~!!§ Q~!!1!~g
5
RCHBUSY
RCHSCED
RCHDED
in RCHSTAT
EQU --X'SO,-EQU
X'40'
EQU
X'01'
RCHTYPE
DS
1X
Channel tusy
IOE scheduled on channel
Channel dedicated
R*2
~it§ Q~!!~Q
RCHSEl
RCHBMX
RCHBPX
RCH370
in RCHTYPE
EQU -X'SO,-EQU
X'40'
EQU
X'20'
EQU
X'01'
10
11
12
13
14
RCHQCNT
RCHFIOB
RCHlIOB
RCHDTCK
RCHCCCK
RCHIFCC
RCHCHCK
RCHSTIDC
DS
DS
DS
DS
DS
DS
DS
DS
18
1C
20
RCHRSTQ DS
RCHOPER DS
RCHCUTBl DS
1F
1F
32H
RCH5IZE
(*-RCHBlOK)/8
6
8
C
EQU
1H
1F
1F
1X
1X
1X
1X
1F
Channel address
Channel lock
Channel status
Channel type
Selector channel
Elock multi Flexer channel
Eyte multiplexer channel
5/37C type channel (5/370 I/C instructicn
sUFPort)
R*3
R*4
R*5
R*6
Number of ICBLOKs queued off channel
Pointer to first IOBLOK queued
Pointer to last IOBLOK queued
Channel data check count
Channel control check count
Interface centrol check ceunt
Channel chaining check count
Result of STIDC instruction issued
at CP initialization; if cc = 3, the
content is X'FFFFFFFF'
Address of channel to be restarted
IOELCK operational on channel time
Control units attached - RCUSTART index
(The index values must be multiplied
by 8 and added to the beginning of the
RtEVELOK table (ARIODV).)
RCHELOK size in doublewords (X'OD')
Section 1. CP Data Areas and Ccntrol Elecks
81
RCUBLOK
RCUBLOK provides control and status information en a defined real control unit. Linkages
are provided to queued IOBLOKs. The ABIOCU field of the PSI points to tbe first RCUELOK,
wbich is generated in ccntiguous storage.
o
RCUADD
RCULOCK
B*1 I R*2
RCUOCNT
RCUFIOB
RCULIOB
10
RCUCHI
BCUCEB
18
RCUCHC
BCUCED
20
RCURSTQ
BCUOFER
8
RCUDVTBL
28
(Variable Length)
Hexadecimal
tisplacement
-----------0
2
4
Field
Name
RCUIDD
RCULOCK
RCUSTIT
Field Description, Contents, I!eaning
DS
DS
DS
~i!§ g~!i1!~g
5
RCUBUSY
RCUSCED
RCUDISI
RCUCHAOF
RCUCHBOK
RCUCHCOF
RCUCHDOF
EOU
EOU
EOU
EOU
EOU
EOU
EOU
RCUTYPE
DS
1H
1H
1X
R*1
in RCUSTIT
--x'eo'--
1X
Control unit address
Control unit lock
Control unit status
Control unit busy
IOE scheduled on control unit
Control unit disabled
BCUCEA to BCBBLCK path is not
RCUCEE to RCBBLCK path is not
RCUCBC to BCHBLCK path is not
RCUCBI to BCHBLOK path is not
X'40'
X'20'
X'08'
X'04'
X'02'
X'01'
Bits defined in RCUTYPE
RCU5HRD--EQU --X'80-'--
B*2
available
available
available
available
Control unit type
RCUSUB
RCU2703
RCU2702
RCU2701
EOU
EOU
EOU
EQU
X'40'
X'03'
X'02'
X'01'
This control unit can be attacbed to only cne
sutchannel
This is a subordinate contrel unit
TCU is a 2703
TCU is a 27C2
TCU is a 27C1
8
C
10
RCUQCNT
RCUFIOB
RCULIOB
RCUCHI
DS
DS
DS
DS
1H
1F
1F
1F
Number of ICBLOKs queued off control unit
Pointer to first ICBLOK queued
Pointer to last IOBLOK queued
Pointer to RCBBLCK - patb I
10
ORG
RCUPRlME DS
RCUCHA
1F
Pointer to the primary contrcl unit
6
82
--------------------------------------
IBM VM/370 Data Areas and Control Block Logic
RCUELCK
Hexadecimal
Displacement
14
18
1C
20
24
28
Field
Name
Field Description, Contents, Meaning
RCUCBB
RCUCHC
RCUCHD
RCURSTQ
RCUOPER
RCUDVTBL
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
16B
Pointer to BCHELOK - path E
Pointer to RCBBLCK - path C
Pointer to RCBBLOK - path I
Address of control unit to be restarted
IOELCK operational on control unit time
Devices attached - RDVSTART index
(the index values must be multiplied
by 8 and added to the teginning of the
RDEVELOK table (ARIODV).)
RCUSIZE
EQU
(*-RCUBLOK)/8
RCUELOK size in doublewords (X'08')
Section 1. CP Data Areas and Contrel Blocks
83
RCWT1SK
RCWT1SK contains the virtual-to-real CCW translation and other data related to a virtual
machine's I/O operation. 1 pointer is maintained to the virtual CCW operaticn. The first
CCW-16 points to the beginning of RCWTASK.
o
8
RCWPNT
RCWVCNT
RCWVC1W
RCWRCNT
10
RCWBE1!:
RCWCCNT
RCWCCW
(Variable Length)
Hexadecimal
Displacement
o
4
8
A
C
E
10
10
14
15
Field
Name
Field Description, Contents, !eaning
RCWPNT
RCWVCAW
RCWVCNT
RCWRCNT
RCWHE1D
RCWCCNT
RCWCCW
DS
DS
DS
DS
DS
DS
DS
1F
1F
1H
1H
1H
1H
1D
RCW1DDR
RCW-FLAG
RCWCTL
ORG
DS
DS
DS
RCWCCW
1F
~it.§ g~li'yed
S4
RCiIO
RCiGEN
RCWHMR
RCiREL
RCiIS1M
RCi2311
RCWINVL
RCiSHR
BQU
EQU
EQU
EQU
EQU
EQU
EQU
EQO
16
RCWCNT
DS
10
ORG
RCWCOMND DS
11
1X
Pointer to next RCWT1SK
Virtual address of CCi chain
Virtual CCi count
Real CCi count
RCiTASK header mark X'FFFF'
RCiTASK control vord count
One or more CCWs for device I/O
CCi data address
celi flag tits
CCW CP-control tits
in RCWCTL
--X'80'X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
I/O data page locked
CP-generated CCi
tMKONT must relocate hoae address/record RO
CCi address relocatatle if CCis moved
IS1! modifying CCi
TIP2311T-E pseudo 2311 on 2314
CCi operation code or address is invalid
Shared user page vas copied
1H
CCW tyte count
RCW1DDR
11
CCW command code
IBM VM/370 Data Areas and Control Block Logic
RDEVBLOK
RDEVELOK is generated by the RDEV macro at system generation. There is cne RDEVELCK for
each real device and one for each binary synchronous line. The tlock ccntains status and
device parameters aPFlicable to I/O instruction processing.
The ARIOIV field of the PSI
and the VDEVREAL field of the VDEVBLOK point to the first RDEVELCK, which is generated in
ccntiguous stcrage.
0
RDEVADD
8
10
I RDEVLOCK
RDEVCUA
RDEVCUB
28
RDEVUSER
RDEVAIOE
RDEVITT
30
RDEVCYL
RDEVSER
38
0
2
4
I R*4
RDEVQUED
RDEVIOCT
RDEVLNKS
RDEVTCTL (8 device dependent bytes)
40
RDEVTl4JAT
48
RDEVIOER
------------
I R*3
RDEVLIOE
20
Hexadecimal
Displacement
R*2
RDEVFIOB
18
50
R*1
R*5
I R*7
I R*8
RIEVCTRS
RDEVNAME 1//RDEVRSV1///1
Field
Name
RDEVADD DS
RDEVLOCK DS
RDEVSTAT DS
R*6
RDEVIOBL
Field Description, Contents, Meaning
1a
1H
1X
!!it,2 g§!!neg in RDEVSTIT
RDEVBUSY EQU -X'80'-RDEVSCED EQU
X'40'
RDEVDISA EQU
X'20'
RDEVRSVD EQU
X'10'
RDEVIRM EQU
X'08'
RDEVNRDY EQU
X'04'
RDEViAII EQU
X'02'
RDEVDED EQU
X'01'
R*1
Device address
Device lock
Device status
Device busy
IOE scheduled on device
Device disatled (offline)
Device reserved
Device in intensive error recording mode
Device intervention required
GRI! - IOELCK pending, queue requests
Dedicated device (attached
to a virtual
machine)
Section 1. CP Data Areas and Contrel Elocks
85
RDBVELOK
Hexadecimal
tisplacement
5
Field
Name
Field Description, contents, Meaning
RDBVFLAG DS
§.i1.§
g~!!1!~g
RDBYSKUP BQU
RDBVPRBF BQU
DASD - ascending order seek que~ing
tASt - volume preferred for Fag1ng
tAS! - volu~e attached to system
DAst - Cp-owned volume
tASt - volume mounted, not attached
DASt - volume dedicated as 3330V
:CASI - device selected for ~SS fount
Console - terminal has print sUFFress
Consele - terminal executing FREPARB command
Console - ICBLOK pending; queue request
Console - 2741 terminal cede identified
Console - device is enabled
Console - next interrupt from a Halt I/O
Console - device is to be disabled
Console - 370x NCP resource in EP mode
Spooling - device output drained
Spooling - device output terminated
Spooling - device busy with acceunting
Spooling - force printer te single sFace
Spooling - restart current file
Spooling - tackspace the current file
Spooling - print/punch job seFarator
Spooling - UCS buffer verified
Special - network control Frogram active
Special - 270x Bmulatien program active
Special - 370x in buffer slowdown mode
_Sl>_e_cJaJ - allt_o_m.aticdJlm-p/l_cad.~Ra.bled
Special - ICBLOK pending; queue requests
Special - emulator lines in use by system
Special - automatic dump/lcad process active
Special - BTU trace requested
X'40'
EQU
X'20'
BQU
BQU
BQU
BQU
BQU
BQU
BQU
BQU
BQU
BQU
BQU
BQU
EQU
EQU
BQU
EQU
BQU
EQU
EQU
BQU
EQU
BQU
BQU
_E_QtJ
BQU
BQU
BQU
EQU
X'10'
X'OS'
X'04'
X'02'
X'SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
X'SO'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
X'SO'
X'40'
X'20'
X_'10'
X'OS'
X'04'
X'02'
X'01'
6
RDEVTYPC DS
1X
R*3
7
RDEVTYPE DS
1X
R*4
8
C
RDBVFIOB
RDBVLIOB
RDEVCUA
RDBVCUB
RDBVQUED
RDEVIOCT
RDBVAIOB
RDBVUSER
RDEVATT
RDBVCYL
RDBVSER
RDEVLNKS
RDBVTCTL
RDEVTf!AT
RDEVQCNT
1F
1F
1F
1F
1D
1F
1F
1F
1H
1H
CL6
1H
SX
1F
1X
R*5
10
14
18
20
24
28
2C
2B
30
36
38
40
44
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
Device flags, device dependent
in RDEVFLAG
RDBVOWN
RDBVf!OUT
RDBV333V
RDBVSBL
RDBVPSUP
RDBVPRBP
RDBVACTV
RDBVIDNT
RDEVBNAB
RDEVHIO
RDEVDISB
RDEVEPMD
RDEVDRAN
RDEVTERf!
RDEVACNT
RDEVSPAC
RDBVRSTR
RDEVBACK
RDEVSBP
RDEVLOAD
RDBVLNCP
RDEVLCBP
RDEVSLOW
RD_BJAU_~()
R*2
--X'80'--
RDEVSYS
RDBVWAIT
RDEVBPLN
RDEVRCVY
RDEVTBTU
86
1X
Device type class (see "Appendix A.
CP and Rses Equate Symbols")
Device type (see "Appendix A.
CP and RSCS Equate Symbols")
Pointer to first IeBLOK queued
Pointer to last IOELeK queued
Pointer to RCUBLOK - interface A
Pointer to RCUBLOK - interface E
IOELeK queued time - TOD clock units
Device I/O count
Active IOELeK
Pointer to VMBLeK of dedicated user
Attached virtual address
DASI - current cylinder location
Device volume serial number
DASI - number of links to this disk
S device-dependent terminal ccntrol bytes
Device attached time - TCD clcck word 0
Number of queued ICBLeKs
IBf! VM/370 Data Areas and Control Block Logic
RDEVELCK
Hexadecimal
Displacement
45
Field
Name
Field Description, Contents, !eaning
RDEVSTA2 DS
1X
R*6
!!it§ g~!!ned in RDEVSTA2
RDEVRACT EQU -xi 8o.-RDEVBUCH EQU
X'40'
RDEVCONC EQU
X'20'
RDEVDROP EQU
X'10'
RDEVALT EQU
x'08'
RDEVSYBC EQU
X'04'
RDEVPURG EQU
X'02'
RETRYSi EQU
X'01'
46
47
48
4C
50
52
54
RDEVMDL
RDEVFTR
RDEVIOER
RDEVCTRS
RDEVNAME
RDEVRSV1
RDEVIOBL
DS
DS
DS
DS
DS
DS
DS
RDEVSIZE EQU
1X
1X
IF
1F
1H
1H
1F
tevice status (byte 2)
Active device is being reset
Device is busy with the channel
Contingent connection present
Logdrop or loghold indicated
Alternate path device
Attention signal during active I/O
3800 - Purge files in error
Retry count switch
R*7
R*8
tevice model number
Device feature code
Pointer to IOERELOK for last CP error
Pointer to error counter centrol block
Real device name
Reserved for IB! use
IOELCK queue lock
(*-RDEVELOK)/8 RDEVELOK size in doutlevords (X'OB')
~9f CP-2!!!~g Q~vi£~§
38
3C
40
ORG
RDEVALLN DS
RDEVCODE DS
ORG
RDEVPAGE DS
RDEVRECS DS
RDEVPNT DS
RDEVUSER
1F
1H
RDEVTCTL
1F
1F
1F
Anchor for RECBLCK chain fer faging
Anchor for RECBLOK chain fcr speoling
Pointer to next RDEVELCK fer allecation
3C
RDEVDCTL DS
1F
Pointer to tRU!TIBL control block
28
2C
Anchor for ALOCELOK chain fer this device
Device code - SYSOWNED index
~9f §f~Ehic Q~vic~§
2E
30
ORG
RDEVCORD DS
RDEVGRTB DS
RDEVCYL
1H
1F
Current line coordinates
Address of table of CCis and data streams
~9f ~E29!!!!g Unit !!~rd
28
2C
2D
2E
2F
ORG
RDEVSPL DS
RDEVCLAS DS
ORG
RDEVDELP DS
RDEVCURP DS
DS
RDEVlUXP DS
RDEVFSEP DS
RDEVQUED
1F
4C
RDEVUSER
A
1X
1X
1X
1X
30
RDEVXSEP DS
CL4
34
38
40
RDEVEXTN DS
RDEVIMAG DS
RDEVOVLY DS
1A
CL8
CL4
18
1C
X9f
18
1C
38
Pointer to active RSPLCTL bleck
Device class(es)
Anchor for delay purge queue
Current page length in half inches
Reserved for IB! use
Maximum numter of entries in delay purge queue
Function control block for sefarator
page (6, 8, or 12)
Name of character arrange.ent table fer the
separator page
Pointer to the 3800 extension
Name of current image library
Name of current forms overlay
I~f.!!nal Devi£~
CRG
RDEVCON DS
RDEVAIRA DS
ORG
RDEVRCNT DS
RDEVQUED
1F
1F
RDEVTCTL
1H
Pointer to CONTASK list
Attention interrupt return address
Start/stop line retry count
Section 1. CP Data Areas and Centrol Blocks
87
RDEVBLOK
Hexadecimal
Displacement
3A
Field
Name
lield Description, Contents, Meaning
RDEVTFLG DS
1X
Additional terminal flags
~~!~ g~!~~g
RDEVLOG
in RDEVTFLG
EQU --X'8'O-'--
RDEVREST EQU
RDEVATOF EQU
X'40'
X'20'
TERM and GRll - Logon precess has been
initiated
TER! - Terminal in reset process
TERM - Suppress attention signal
RDEVLOG
RDEVMORE
RDEVRUN
RDEVREAD
RDEVCPNA
RDEVTRQ
RDEVCTL
RDEVHOLD
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
GRll
GRAl
GRll
GRll
GRll
GRll
GRAP
GRll
3B
3C
3D
3E
3F
RDEVGRTY
RDEVLLEN
RDEVATNC
RDEVBASE
RDEVRSV3
DS
DS
DS
DS
DS
1X
1X
1X
1H
1X
Display alternate screen size index
Device line length
Device attention count
370x base address for emulator line
Reserved for IBM use
46
ORG
RDEVTMCD DS
RDEVMDL
1X
Terminal code
in RDEVTMCD
EQU -X'20'-EQU
X'10'
EQU
X'OC'
EQU
X'08'
EQU
X'04'
EQU
X'OO'
-
Logon process has been initiated
Screen full; more data waiting
Screen in running status
Read pending for screen input
Last input not accepted
Timer request pending
Control function interrupt pending
Screen full; in hold status
Bit~ g~!!ned
RDEVTEXT
RDEVUSC8
RDEYAPLC
RDEVAPLP
RDEVCORR
RDEVPTTC
47
RDEVSADN DS
1X
3270 Text character set
ISCII-8 level keyboard
APL Correspondence keyboard
IPL PTTCjEBCD keyboard
Correspondence keyboard
PTTCjEBCt keyboard
Terminal set-address number
J1Q!Ll1Q~ ~2~~ic~!!2~~ ~2ntfQ!ler
1C
2E
30
38
3C
ORG
RDEVEPDV DS
ORG
RDEVMAX DS
RDEVNCP DS
RDEVNICL DS
RDEVCKPT DS
X2f
30
34
S8
ll1Q
RDEV!IR!
1F
RDEVCYL
1H
CL8
1F
1F
Start of free RDEVBLOK list for EP line
Highest valid NCP resource name
Reference name of active 3704 NCP
Pointer to network control list
Pointer to CKPBLOK for re-enable
S~~2!~ ~YEEQrt
ORG
RDEVBSC DS
RDEVPDLY DS
RDEVNCP
1F
1F
Pointer to binary synchroneus centrol block
Poll delay timer interval
IBM VMj370 Data Areas and Control Block Logic
RECELCK
RECBLOK maintains the correlation of DISD storage pages to a specific cylinder location.
Also maintained is a bit map to indicate the page slots available for data page storage.
The RDEVRECS field and the BDEVPAGE field of the RDEVELCK point to BECELCK.
o
BECPNT
RECCYL
I R*1
I B*2
RECMAP
8
(128 pages maximum)
.~'------------------------------------------------------~
Hexadecimal
Displacement
-----------0
4
6
7
8
Field
Name
BECPNT
RECCYL
RECUSED
RECMAX
BECMAP
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
1F
1B
1X
1X
1L
-------------------------------------R*1
B*2
Pointer to next RECBLOK on cbain
Cylinder address for pages in this block
Number of pages currently in use
Maximum numter of pages available
Page allocation bit map (128 Fages maximum)
Bits defined in RECMAP
O-=-page-is-available
1 - Page has been assigned
Although the size of RECMIP is fixed, the maximum number of pages
available on a cylinder is device dependent. Bits corresponding to pages
not physically present on a cylinder are set to 1.
!ot~:
RECSIZE
EQU
(*-BECB10Kj/8
BECELOK size in doutlewords
Section 1. CP Data Areas and Centrel Blocks
89
RECPAG
RECPAG retains up to 4K bytes of error recording
specified errcr recording cylinder.
o
RECCCPD
data for
RECNXT
I R*1
eventual placement
en the
I R*2
8
RECDATA (4088 bytes)
Hexadecimal
1Jisplacellent
-----------0
4
6
Field
Name
Field Description, Contents, Meaning
RECCCPD DS
DS
RECNXT
RECFLAG1 DS
4X
2X
1X
R*1
1!it§ g~fi~g in RECFLAG1
RECPAGIO EQO -X'80-'-RECPAGFR EQO
X'40'
RECPAGFL EQO
X'20'
RECPAGER EQO
X'10'
RECPAGFA EQO
X'08'
7
RECFLAG2 DS
1X
Page
Page
Page
Next
Page
R*2
1!.!!§ g~fill~g in RECFLAG2
RECPAGFM EQO --X'80'--RECPAGDN EQO
8
RECDATA
DS
RECPAGSZ EQU
90
CCPE of the record
1Jisplacement to next error record
Record usage flags
contains valid data
is cleared
is full of error records
page is unreadakle (I/C error)
contains page frame reccrds
Record for. at flag
X'OO'
Set in page 1 of a recording cylinder when
the cylinder is teing formatted. This flag
bit is reset when all pages are cleared.
Cylinder formatted
4088C
Data area
(*-RECPAG) /8
Size of page in doublewords (X'512')
IBM VM/370 Data Areas and Control Block Logic
RSPLCTL, RSPXBLOK
RSPLCTL is used in conjunction with SFBLOK
RBEVSPL field of RDEVBLCK points to RSPLCTL.
0
RSPRSTRT
8
RSPVPAGE
10
RSPMISC
18
RSPDPAG2
20
RSPRPAG2
Eexadccimal
Displacement
Field
Name
o
RSPRSTRT
RSPDPAGE
RSPVPAGE
RSPRPAGE
RSPMISC
RSPSFBLK
RSPDPAG2
RSPVPAG2
RSPRPAG2
RSPFLAG1
4
8
C
10
14
18
1C
20
24
25
RSPXBLOK:
fer
processing closed
RSPtPAGE
R*1
sFcol files.
The
I
I
I
RSPRPAGE
I
I
RSPSFBLK
I
I
RSPVPAG2
I
I
!////I/RSPRSVD//////I
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1F
1F
1F
1X
Restart CAW - CCW address
BASB location (DCER) of current Fage buffer
Virtual address of page kuffer
Real address of page buffer
Use varies according to caller
Pointer to SFBLCK for file
BAst locaticn of second Fage buffer if any
Virtual address of second Fage buffer if any
Real address of second page buffer if any
Real spooling control flag byte
Bits defined in RSPFLAG1
RSPBF1IOEQU --X'80'---RSPBF2IO EQU
1'40'
RSPBF1VL EQU
1'20'
RSPBF2VL EQU
1'10'
I/O Fending
I/O Fending
Buffer 1 is
Buffer 2 is
RSPRSVD
DS
3X
Reserved for IBM use
RSPSIZE
BQU
(*-RSPLCTL) /8
Size in doutlewords (X'05')
on kuffer 1
on kuffer 2
full of data tc Frint
full of data tc Frint
REAL DEVICE EXTENSION BLOCK
RSPXBLOK is used with the RDEVBLOK to accommodate the 3800 requirements.
Hexadecimal
Displacement
o
RSPXCHR
RSPXCRWC
8
RSPXCMOD
RSPXFCB
Pield
Name
Field Description, Contents, Meaning
----------0
4
8
C
RSPXCHR
RSPXCRWC
RSPXCMOD
RSPXFCB
DS
DS
DS
DS
RSPXSIZE EQU
CL4
4X
CL4
CL4
Character arrangement table now in 3800
Current contents of WCGMs
Copy module now in 3800
FCB now in 3800
(*-RSPXBLOK)/8 RSPXBLOK size in doublewords (X'Ol')
Section 1. CP Data Areas and Centrol Blocks
91
SAVEAREA
SAVEAREA is used to save the registers of
.odule. Register 13 points to SAVEAREA.
o
SAVERETN
SAVER12
8
SAVER13
SAVEWRK1
10
SAVEWRK2
SAVEWRK3
48
SAVEWRK4
SAVEWRK5
50
SAVEWRK6
SAVEWRK7
58
SAVEWRK8
SAVEWRK9
Field
Na.e
Field Description, Ccntents, !eaninq
SAVERETN DS
1F
R~gefi~i!!g~ g{ 2!!~~~TN I~
-ORG -SAVERE'!'N
Active SAVEAREI (caller's return address)
In£lud§
~f2~§§QE
Address
1
SAVEPROC DS
SAVERTN DS
11
31
Active SAVlAREA
processcr address
Active SAVEAREA -- return address
o
ORG
SAVENEIT DS
SAVERETN
1F
Inactive SAVEIREA (next SAVEABEA address)
10
SAVER12
SAVER13
SAVEWRK1
SAVEREGS
DS
DS
DS
DS
1F
1F
1F
12F
Caller's tase (R12)
Caller's SAVEAREA (R13)
Called routine's work area
Caller's registers (RO to R11)
10
14
18
1C
20
24
28
2C
30
34
38
3C
40
44
48
4C
50
54
58
5C
SAVERO
SAVER1
SAVER2
SAVER3
SAVER4
SI VER5
SAVER6
SAVER7
SAVER8
SAVER9
SAVER10
SAVER11
SAVEWRK2
SAVEWRK3
SAVEWRK4
SAVEWRK5
SAVEiRK6
S1VEWRK7
SAVEiRK8
SAVEWRK9
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
SAVEREGS
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
1F
11
11
11
1F
1F
1F
1F
1F
4
8
C
SAVESIZE EQU
92
has called another
SAVEREGS
40
Hexadecimal
tisplacement
o
a module when that module
Called routine's work area (8 fullwords)
(*-SAVEAREA)/8 Size in doutlewords (X'OC')
IBM VM/370 Data Areas and Control Block Logic
SAVTAELE
SAVTABLE is used in the initial program loading of saved virtual machine na.ed systems.
It is created by the na.e system generation process (SIVESYS macro/SlVES1S co.mand).
o
SAVPSW
8
SAVGREGS
48
SAVFPRES
68
SAVCREGS
A8
SAVKEYS
Bexadeci.al
Displacement
-----------0
8
48
68
A8
Field
Nalle
Field Description, Contents,
~eaning
SliPSi
DS
iD
PSi c£ virtual machine at SiiESYS ti.e
SAVGREGS
SAVFPRES
SAVCREGS
SAVKEYS
DS
DS
DS
DS
16F
4D
16F
1H
General registers
Floating-point registers
Control registers
Two-tyte entry for each saved page
containing storage keys fer each page
Section 1. CP Data Areas and Centrel Blocks
93
SDRBLOK
Contains counters to record temporary errors on a given I/O device.
o
8
SDRRDEV
S*1
5*2
S*3
S*4
SDRCUA
S*5
SDBCTBS
10
SDRCTRS1
18
Hexadecimal
Displacement
-----------0
4
Field
Nalle
Field Description, Contents, Meaning
SDRRDEV DS
SDRFLAGS DS
1F
1X
S*1
Bits defined in SDRFLAGS
SDRSHRT-EQU- --X'80'-SDRRECD EQU
X'40'
SDRMAX
5
6
7
8
9
C
16
94
EQU
SDRPRMCT
SDRFLCT
SP~.9Y:F.Ji K
SDRLNGTH
SDRCUA
DS
DS
DS
DS
DS
Short OBRRECB to be written
Long OERRICB to be recorded cn counter
overflow
Maximum nu.ters of SDR counters handled
X'20'
1X
1X
1X
1X
3X
Address of associated RD!VELCK
SDRELOK flags
S*2
S*3
S*4
S*5
Parameter list counter
Full tyte counter
Statistical update work tyte
Lenciflitby·t"es) of-SDR counters
primary CUA of device being used
SDRBSIZE EQU
(*-SDRBLOK)
SDRELOK tase size, in tytes
SDRCTRS
DS
10X
SDR error counters
SDRSIZE
EQU
(*-SDRELOK+7)/8 Size in doutlewords (X'03')
SDRCTRS1 DS
10X
Additional SDR error counters for devices
that use .ore than 10 SDR ccunters.
SDRSIZE1 EQU
(*-SDRELCK)/8
Size in doutlevords (X'04')
IBM VM/370 Data Areas and Control Block Logic
SEGTAELE
SEGTABLE is used in conjunctien with the page table (PAGTAELE) and swap table (SWPTAELE)
by the page management routines. The VMSEG field of the VMELOK points to SEGTAELE.
o
Hexadecimal
Displacement
------------
SEGPAGE
S*l I
Field
Nalle
Field Description, contents, !eaning
0
SEGPAGE
DS
lF
0
SEGPLEN
ORG
DS
SEGPAGE
BL.4
Bits defined in SEGPAGE.3
SEGIUY--EQU --X'01'-SEGMIG
EQU
X'10'
SEGENQ
EQU
X'40'
Pointer to page tatle (PAGTAEtE)
S*l
Page table length (Total pages
half of byte)
- 1)
(in left
Segment invalid
Segment migrated if pointer is equal to 0
Segment is enqueued if pointer is equal to 0
Section 1. CP Data Areas and Centrol Blocks
95
SFBLOK
SFBLOK retains all the information relating to a spool file. A pointer provides a linkage
to the next SFBLOK in the chain. The VSPSFBLK field of VSPLCTL and the RSPSFBLK field of
RSPLCTL point to the SPBLOK.
o
SPBPNT
SFBS'IART
8
SPBUSER
10
SPBORIG
20
SFERECSZ
SPBRECNO
18
34
SPEPIAME
--------------------------~
SPBFTYPE
40
SPBtATE
48
SFBTI!!
50
SFECOPY
SFBLAST
58
Hexadecimal
Displacement
o
8
10
18
1C
1E
20
SFBFLASH
S*5
Field
Name
96
I S*4
SFBPNT
SFBSTART
SFBUSER
SFBORIG
SFBRECNO
SFBRECSZ
SFBFILID
SFBFLAG
SFBTYPE
SFBMISC1
SFBRECS
SFBlIAME
I//////SFERSVD//////
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
CL8
CL8
1F
1H
1H
11
S*1
!!!!§ g~!!ned in SFEFLAG
SFBINUSE EQU -1'80'--SFBRECOK EQU
X'40'
SFBUHOLD EQU
X'20'
SFBDUMP EQU
X'10'
SlBOPEN EQU
X'08'
SFBSHOLD EQU
X'04'
SFBEOF
EQU
X'02'
SFBRECER EQU
X'01'
21
22
24
28
I S*3
SFBDIST
60
4
SPERECS
S*1 I S*2 I SFEMISC1
28
SFBPILID
DS
DS
DS
DS
11
1H
1F
CL12
Pointer to next SFBLeK
tAS! location (CCPD) of first page buffer
VMUSER identification of file o~ner
VMUSER identification of file origin
Number of data records in file
Logical record size - excluding CCis
Einary system file number
SFELCK control tits
File being processed
Allocation records complete
File in user hold status
File is a CP systea du.p
Input file has been opened
File in system bold status
Input file bas reached EOF
SFEREC chain incomplete
S*2
Device type for speol output
Use varies according to caller
Pointer to RECBLOKs for active file
Filename
IBft VM/310 Data Areas and Control Block Logic
SFBLCK
Hexadecimal
Displacement
34
40
48
50
54
56
57
Field
Name
Field Description, Contents,
SFBFTYPE
SFBDATE
SFBTIME
SFBLAST
SFBCOPY
SFBCLAS
SFBFLAG2
DS
DS
DS
DS
DS
DS
DS
CL12
CL8
CL8
1F
1H
1X
1X
S*3
S*4
~eaninq
Filetype
Creation date of spool file
Creation time of spool file
DASD location (CCPD) of last page buffer
Number of copies requested
Spool file class character
SFELOK flag (byte 2)
Bits defined in SFBFLAG2
SFBHOLD--EQU --X'80'---SFBNOHLD EQU
SFBFLNMT EQU
!~!~:
Save input file, or hold output file
Delete input file, or do net hold output file
File not empty if on
X'40'
X'20'
SFBHOLD and SFBNOHLD override options in VDEVBLOK.
SFBREQUE
SFBRSTRT
SFBTICER
SFBPURGE
SFBFIRST
SFBMON
EQU
EQU
EQU
EQU
EQU
EQU
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
Requeue spool file
Restart in progress
Buffer TIC error
Purge open spool file
Indicate first page written
Monitor spool file
58
SFBDIST
DS
CL8
Distribution code
60
64
65
SFBFLASH DS
SFBSTCPY DS
SFBRSVD DS
CL4
1X
XL3
SFBSIZE
(*-SFBLOK) /8
EQU
S*5
Overlay name for 3800 is flashing
Current starting copy number
Reserved for IBM use
Size in doutlevords (X' OB' )
Section 1. CP Data Areas and centrol Blocks
97
SHQBLOK
SHQBLOK provides a holding function for
another user cr to a real output device.
o
8
Hexadecillal
tisplacement
-----------0
4
4
5
S*1 I S*2
Field
Name
to
I///SHQSPARE///I
SHQPNT
SHQFLAGS
SHQUHOLD
SHQSHOLD
Field Description. Contents. !eaning
DS
DS
DS
DS
EQU
EQU
SHQSPARE DS
SHQUSER DS
SHQBSIZE EQU
98
Frevent output
---------------------------------------------------1
SHQUSER
I
TYPPRT
TYPPUN
6
files to
I
SHQPNT
1F
OCL4
11
11
~i!§ de!i~ed !~ ~H~QHQLD
8
identified spool
Printer
Punch
S*1
S*2
9Rg
21
CL8
(*~SHQBLOK)
Address of next SHOBtOK
Length
User USER HeLD flag tyte
User SISTI! HOLD flag byte
~~~~]~~]
See "Appendix A. CP and RSCS Equate Symbcls"
See "Appendix A. CP and RSCS Equate symbols"
Reserved for IB! use
Virtual machine user identification of
file owner
/8- Size in doul:lewords (I' 02' )
IBM VM/370 Data Areas and Control Elock Logic
SHRTAfLE
SBRTABLE contains pointers to the segment locations of named systems for beth the shared
and nonshared user. This block is used in paging. IPt. and virtual machine assist
o~erations.
PAGTABLE-8 points to SHRTAELE.
o
SHRFFNT
S*l
SHRNA!E
8
10
SHRTSIZE I SHROSECT
18
Hexadecillal
Displacement
------------
SBRFAGE
Field
Name
Field Description, Contents, fteaning
SHRFPNT
DS
1F
0
1
SHRFLAG
SHRFPNT
ORG
DS
DS
SHRFPNT
1X
3X
!!i!§
g~!!ll~g
SHRNOPRT EQO
DS
DS
DS
14
18
DS
DS
1F
CL8
1H
1H
1F
1F
1C
SHRPAGE
DS
1F
DS
Pointer to next SHRTABLE
S*l
Shared segment flag kyte
Pointer to next SHRTABLE
in SHRFLAG
-x''4'O,--
SHRBPNT
SHRNA!E
SHRTSIZE
SHRUSECT
SHRSEGCT
SHRSEGN!
;2
SBRSEGCT
SHRSEGN!
0
4
8
10
SBRFPNT
Nonprotected shared segments
Pointer to previous SHRTABLE
Name of saved system
Size of SBRTABtE in doublewords
Number of users using this segment name
Number of shared segments
Contains shared segment nuabers; up to four
segment numbers per word
Pointers to each of the shared {age tables.
There is ene word for each shared segment.
The entry is the same as S*1 SEGPAGE in
"5!GTAftE: Segment Table."
In attached processor (AP) mode, there will be two sets of page tables (FAGTAEt!)
for each shared segllent; one for the main processor, one for the attached processor.
SBRPAGE will point to the page tables for the lIain processor. The page tables fer the
attached processor will be at a fixed displacement (P1GE!P) froll those of the main
processor.
!~te:
Section 1. CP Data Areas and Ccntrol flocks
99
SPLIIK
SPLIIK resides in auxiliary storage and contains one Fage (4096 bytes) of unit record
sFeol inforaation consisting of data and all required eCis. The RSPVPAGE field and the
RSPRPAGE field in RSPLCTL point to SPLIIK.
o
SPNXTPAG
SPPRIPAG
8
SPR!HSC
SPRECIU!!
10
Spool Buffer Data Area
(4032 bytes) 1
FDO
SPCHAR
SPRSVD1
FD8
SPC!OD
SPFCBS
FEO
SPRSVD2
FF8
Bexadeci.al
tisplacellent
-----------0
4
8
C
FDO
FD4
FEO
FE4
FE8
FF4
FF5
I S*1 I
Field
Name
SPRSVD3
--------------------------------------
SPNXTPAG
SPPREPAG
SPRftISC
SPRECIUM
DS
DS
DS
DS
IF
IF
IF
IF
SPSIZE
EQU
(*-SPLINK)
Size in bytes (Xll01)
SPCHAR
SPRSVDl
SPFCB
SPCMOD
SPRSVD2
SPFLSHC
SPFLAGl
ORG
DS
DS
DS
DS
DS
DS
DS
SPLIRK+4096-48
CL4
CL12
CL4
CL4
CL12
lX
S*l
lX
S*2
End of first DASD tuffer
3800 character arrangement table for file
Reserved for IBM use
3800 function centrol tleck fer file
380e copy module for file
Reserved for IBM use
3800 flash count
3800 flag byte
SPRSVD3
SPFILID
SPTI!!E
DS
DS
DS
SPERDSIZ EQU
IFirst DASD buffer only.
100
I
Field Description, Contents, Beaning
l!it§ g!!!!1!~g in SPFLAGl
SPCOPYFG EQU --X'80'FF6
FF8
FFA
~*2
tASt location (DCHR) of next Fage buffer
DASt location (DCHR) of previcus page buffer
Use varies according to caller
lu.her of data records in buffer
If flag is set, aultiple cCFies can be done
in one transmission
2X
1H
CL6
Reserved for IBft use
File identifier used for vErificatien
SFETI!!E -- used for verification
*-SPCHAR
End-ef-buffer size in tytes
All others comprise 40ee bytes.
IB!! V!!/370 Data Areas and Control Block Logic
SiPTIELE
SWPTIBLE is used in conjunction with the page table (PIGTIBLE) and the segment table
(SEGTABLE) by the CP page management routines for relating the virtual storage to tlSD
slots and real storage. The PAGSWP field of the PAGTABIE points to SWETIELE.
o
SiPV!!
S*2
8
Hexadecimal
Displacement
-----------0
4
S*7
S*3
S*4
Field
Name
Bit§ Q~!i~ed
SiPAPP
EQU
1F
1X
i~
SWPFLAG2
SiPPIG
ORG
D5
SWPFLAG2
1F
8
SiPFLAG
DS
1X
~.!!§ Q~!i~ed
9
B
C
E
F
SiPVPAGE
SWPKEY1
SWPKEY2
SiPCYL
SiPDPAGE
SiPCODE
S*6
BQU
EQU
EQU
EQU
EQU
EQU
Pointer to Fage tatle
5*1
Swap table flag bits
in SWPFLAG
EQU
DS
DS
DS
DS
DS
DS
1X
1X
1X
1H
1X
1X
ll'''"
Attached processor's shared Fage table and
swap tatle
--X'80'-X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
.u'¥u
Pointer to V!!BLCK
Swap table FLIG2 bits
X'80-"-
4
A
S*5
Field Description, contents, eeaning
SiPV!!
DS
SWPFLIG2 DS
SiPTRINS
SWPREC!!P
SWPILLOC
SiPSHR
5iPREF1
SiPCHG1
SiPREF2
SiPCHG2
SWPCYL
SWPFAG
Page in transit
Page permanently assigned
Page enqueued for allocaticn
Page shared
First half-page referenced
First half-page changed
Second half-page referenced
Second half-page changed
S*2
S*3
S*4
S*5
S*6
Virtual page number within the segment
Virtual storage key, first 2048 bytes
Virtual storage key, second 2048 bytes
DASt cylinder address
DAsr page number on cylinder
RDEVELOK device code
(The device code is used as an index into
the list of Cp-owned paging volumes pOinted
to ty D!!KSYSOW)
!ote: For each SWPTABLE there is only one doutleword that consists of SiPV!! and SWPFIG
followed by 16 entries (one for each PIGTAELE entry) that consist of S*1, S*2, S*3, S*4,
SiPCYL, S*5, and S*6. Thus, the total size of the SWPTIBLE is 17 doublewcrds.
Section 1. CP Data Areas and Contrel Blocks
101
SYSLOCS
SYSLOCS contains user logon and dial statistics,
values, and line edit values.
0
DHKSYSDT
8
DMKSYSTM
10
DMKSYSLW
log message
20
DMKSYSNM
DMKSYSMI
28
DMKSYSMU
DMKSYSND
30
DMKSYSLB
DMKSYSUD
38
DMKSYSPL
1//////1//////////1//1/1//1//
40
48
50
58
Hexadecimal
Displacement
------------
data, TOD
DMKSYSLG
18
--------------------------------------------------------,
DMKSYSDW
I
-,----------------------------1
1 s* 1 1 S*2 1 S*3 1 S*4
1
------------------------------------------------------1
S*5
1////////1111/////////////1////1/////1
---------------------------------------------------------1
DMKSYSCK
1
Pield
Name
Pield Description, Contents, Meaning
0
8
10
DMKSYSDT DC
DMKSYSTM DC
DMKSYSLW DC
CL8'MM/DD/YY' Date of system log message
CL8'HH:MH:SS' Time of system log message
X'00',X'00',CL10' ,
Weekday of system log messages
1C
20
24
28
2C
30
34
38
3C
40
DMKSYSLG
DMKSYSNM
DMKSYSMI
DMKSYSMU
DMKSYSND
DMKSYSLB
DMKSYSUD
DMKSYSPL
DC
DC
DC
DC
DC
DC
DC
DC
DC
DMKSYSDW DC
Pointer to first log message block
Current numter of users on the system
Maximum numter of users allowed cn the system
Maximum numter of users on the system
Number of dialed users on the system
Pointer to user directory lock block
1(0)
1(0)
Pointer to start of user directory on SYSRES
Pointer to a list of virtual page buffers
1(0)
1(0)
Reserved for IBM use
X'OO',X'OO', CL 1 O·
Day of week in hexadecimal and EBCDIC
4C
4D
4E
50
DMKSYSLE
DMKSYSLD
DMKSYSCD
DMKSYSES
DMKSYSLL
X'7B'
S*1 Terminal line-end symbol
X'4A'
S*2 Terminal line-delete symbol
X'7C'
S*3 Terminal character-delete symbol
X'7P'
S*4 Terminal escape symbol
AL 1 ( 1 30, 1 2 9, 72, 8 0)
S*5 Default line lengths for 3210 and 3215 2741 and 1050 - 3270 and 3066 terminals
53
58
DC
DMKSYSCK DC
4F
102
time/date and
DC
DC
DC
DC
DC
1(0)
P'O'
P'O'
P'O'
P'O'
XL5'O'
D'O'
Reserved for IBM use
TOD clock value last stored by
accounting, DUMP, or machine check
IBM VM/370 Data Ireas and Control Block Logic
SYSTEL
SYSTBL contains the system and DASD informaticn required to load a saved system by name.
SYSTEL is built during system generation in DMKSNT using the NAMESYS macro.
0
8
10
18
20
28
SYSPNT
SYSSIZE
-----,
I
---------------------------------------------------------1
SYSNAME
I
---------------------------------------------------------1
VSYSRES
SYSVADDR
I
--------1
SYSVOL
SYSCYL
1
-------------------------------------------------------1
SYSSTART
SiSPAGCT
SYSPAGLN I/S*1/1 S*2
SYSPAGNM
(Variable Length)
SYSSEGLN
SYSHRSEG
(Variable Length)
Hexadecimal
tisplacement
Field
Name
Field Descripticn, Contents, Meaning
==~======--~~
0
4
8
10
SYSPNT
SYSSIZE
SYSNAME
VSYSRES
DS
DS
DS
DS
1F
1F
CL8
CL6
16
SYSVADDR
J,joJ
TIC
111
18
SYSVOL
DS
CL6
1E
SYSCYL
DS
1H
20
24
28
2A
2B
SYSSTART DS
SYSPAGCT DS
SYSPAGLN DS
DS
SYSFLAG DS
1F
1F
1H
1X
1X
~it§ g~!!~g
SYSPROT
in SYSFLAG
EQU --X'8QI-
SYSPAGNM DS
1F
SYSSEGLN DS
SYSHRSEG DS
1H
1X
S*1
S*2
Chain pointer to next entry
Minimum storage size needed to run system
System name
Volume identification number of DASD
containing user's system
Virtual address of VSYSRES
Volume identification number of DASD
ccntaining saved pages
Cylinder on VSYSRES of user's system. Same
as VDEVRELN
CCPD of first page on SYSVCL
Total number of pages saved
Number of entries in SYSPAGNM
Reserved for IBM use
Named system flag
Unprctected shared segments
One fullword entry for each range of pages
to be saved
Numbers of entries in SYSHRSEG
One tyte for each segment to be shared
Section 1. CP Data Areas and Control Blocks
103
TNSREC
TNSRlC is used by DMKIOE to record miscellaneous data records on CP's I/O error recording
cylinders~
The record contains sense data applicable tc a specific l/C device.
o
8
10
18
20
I
TNSKEYN
T*1 I/T*2//I/T*3/1/!*4/1///TNSSPE1/11111/1
------------------------------------------------------1
TNSDTEN
TNSTMEN
1
-------------1
1
TNSCPIDN
--------------------11
TNSDEVAD
TNSVOLID
------------------------------------------------------1
Sense Data
1
(Variable Length)
Hexadecimal
Displacement
o
2
3
4
5
6
8
C
10
18
1A
20
38
50
68
80
98
EO
104
Field
Name
Field Descripticn, Contents, Meaning
TNSKEYN
TNSSWS1
TNSSWS2
DS
DS
DS
TNSS~S3
DS
TNSRECNT DS
TNSSPE1 DS
TNSDTEN DS
TNSTMEN DS
TNSCPIDN DS
1H
1X
11
1X
1X
1H
1F
1F
2F
~~!ic~ ~~~nd~~! ~!!!
~NSDEVAD
TNSVOLID
TNSSNS1
TNSSNS2
TNSSNS3
TNSSNS4
TNSSNS5
TNSSNS6
TNSSNS1
DS
DS
DS
DS
DS
DS
DS
DS
DS
1H
6X
24X
241
241
24X
24X
24X
24X
T*1
T*2
T*3
T*4
Class source 90=T type N/S NCN TPER
Switch byte 0
Reserved for IBM use
Reserved for IEM use
Reserved for IBM use
Reserved for IBM use
Date
Ti.e
Prccessor identification and .odel number
Device address request is ~ending
Vclume identification number
24 Sense bytes
24 Additional sense tytes
24 Additional sense bytes
24 Additional sense tytes
24 Additional sense tytes
24 Additional sense tytes
Last 24 sense bytes
IEM VM/370 Data Areas and Centrol Block Logic
TREXT
TREXT facilitates the tracing of virtual machine program instructions and interrupts.
This block is used whenever the CP TRACE command is invoked. The VHTREXT field of the
VHELOK points to TREXT
0
TREXIN1
8
TBEXIN2
TREXSVC1 I TREXSVC2
T*1 I T*2
TREXLOCK
TREXEERC
TREXLCNT
10
TREXPERA
18
TREXANSI
TREXCR9
20
TREXCR10
TREXCR11
28
Hexadecimal
Displacement
------------
TREXBUFF
(10 douhlewords)
Field
Name
Field Description, Contents, Heaning
0
4
8
A
TREXIN1
TREXIN2
TREXSVC1
TREXSVC2
0
1F
1F
1H
1H
First address - replaced instruction
Second address - replaced instruction
Displaced halfword - instruction 1
Displaced halfword - instruction 2
A
ORG
TREXPSi DS
TREXINTL DS
TREXINTC DS
TREXIN1
1D
1H
1H
Old ESW for pending SVC interrupt
Instructicn length code
Interrupt cede for pending interrupt
C
TREXFLAG DS
1X
8
It!!§
DS
DS
DS
DS
.Q~!~1!~.Q
TREXRUN 1<()n
-"'~
TREXVAT EQU
TREXNDSP EQU
D
TREXOUT
DS
TREXLOCK DS
TREXPERA DS
10
TREXNSI
14
16
18
TREXPERC DS
TREXLCNT DS
TREXANSI DS
ORG
DS
Prevent CFWAIT between events
Call DMKVATRN to put back virtual instruction
DSP should not call TRCIT
X'40'
X'20'
1X
EQU --X'80'--EQU
X'40'
E
10
Tracing control flags
in TREXFLAG
--X'80'----
~~!§ .Q~!~~.Q in TREXOUT
TREXPRT
TREXCON
T*1
T*2
Trace output controls
Output to the virtual spool printer
Cutput to user virtual machine terminal
18
1F
Indicates tracing when set
Address of instruction causing PER interrupt
TREXPERA
6X
Redefinition for TRACE use
Actual next (or last) sequential instruction
18
18
1A
PER code to be reflected
Printed output line count
Address of next (or last) sequential
instructien
Section 1. CP Data Areas and Control Blocks
105
TREXT
Bexadecimal
~isplacement
Field
Name
1C
TREXCR9
1C
ORG
TREXCTL DS
TREXCTL1 DS
TREXCTL2 DS
1D
!!.!!§
DS
OF
Shadew control registers fer PER trace
TREXCR9
OB
1X
1X
Redefinition for TRACE use
Balfwcrd holding tracing centrol bits:
First byte = same as VMTRCTL in VMBLOK
Secend byte = remaining control bits
.9~!'!~.9 in TREXCTL2
--x'ao'--
TREXCCW
TREXCSW
TREXBRAN
TREXINST
BQU
EQU
EQU
EQU
1C
1E
20
1E
20
TREXPER
TREXPREG
TREXCR10
TREXPRNT
TREXTERM
DS
DS
DS
DS
DS
22
TRBXRUNF DS
1B
24
TREXPNTR DS
1F
24
TREXCR11 DS
TREXBUFF DS
1F
10D
Address range ending value
Consele/printer output buffer (80 bytes)
TREXSIZE BQU
(*-TREXT) /8
TREX! size in dcublevords (X'OF')
28
106
Field Descripticn, Contents, Meaning
X'40'
X'20'
X'10'
XL2
1B
1F
1B
1B
Trace
Trace
Trace
Trace
virtual and real eCis
virtual and real CSWs
successful branches
all instructions
PER control field
PER register mask field
Address range starting value
Printer flag bits corresponding to TREXCTL
Terainal flag bits correspending to
TRlXCTL
Run/ncrun flag bits corresFonding to
TRlXCTL
Pointer to first stacked TRACE request, if
any
IBM VM/310 Data Areas and Centrol Block Logic
TBQELOK
TRQBLOK manages the timing facilities of VM/370.
r
0 I
I
8 I
I
10 I
I
18 I
I
20 I
Hexadecimal
Displacement
TRQBVAL
TRQBFPNT
TRQEBPNT
TRQBTOD
TRQBUSER
TRQEIBA
TRQEQUE
Field
Name
Field Description, contents, Meaning
------------
-------------------------------------TRQBVAL
TBQBFPNT
TRQBBPNT
TRQBTOD
TRQBUSER
TRQBIRA
TRQBQUE
0
8
C
10
18
1C
20
DS
DS
DS
DS
DS
DS
DS
TRQBSIZE EQU
I •
1D
1F
1F
1D
1F
1F
1D
TOD clock comparator value for interrupt
Pointer to next TRQBLOK
Pointer to previous TBQBLCK
TOD clock value when TRQBLCK is queued
Address of VMBLOK for user
Interrupt return address
Time left in queue; tracking virtual
processor tiller
(*-TRQBLOK)/8
Size in doutlewords (X'05')
Local Graphic Device Support
The following continuation of the TRQBLOK
tuilt, referenced, and released by DMKGRF.
r
28 I
Hexadecimal
Displacement
28
2C
2E
local graphic
device support
is
T*2
Field Description, Contents, Meaning
TRQBCRT DS
TRQBDEV DS
TRQBFLAG DS
~~~§ ~~!1~~~
2F
TRQEDEi
TRQBCRT
Field
Name
CRTFMT
CRTDIAG
CRTALRM
CRTiNG
CRTCARD
CRTTAB2
CRTAPL
CRTSIO
CRTAIO
DSECT for
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
TRQBLINE DS
1F
1H
1X
lD
T*1
%~2~rLAQ
X'80'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
CRTSIO
1X
Graphic device return IRA
Graphic device device address
Graphic device flags
Screen formatted VM/370 online
Screen written with Diagnose
Screen has alarm message
Screen has MORE ••• warning
Data from card reader
Second pass flag for tab function
APL read buffer allocated
User issue tiagnose to input area
Timer interrupt pending after I/O co.pletes
T*2
Line coordinate for input area
Section 1. CP tata Areas and Centrel Blocks
107
TBQBLOK, UDEFELOK
I •
Bemote Graphic Device Support
The following continuation of the TBQBLOK DS!CT for remote graphic
built, referenced, and released by DMKRGA and DMKRGE.
28
Hexadecimal
tisplacement
TRQBCRT
Field
Nalle
-----------28
2C
2E
as
DS
DS
DS
EQU
lF
lH
lH
X'FF'
a buffer
o
0
38
3C
108
GraFbic device return IRA
GraFhic device line address
Rescurce identification
Timer interrupt for general FoIl
for user
device
block data
in
user directory
access
UDBFWOBK
38
------------
TRCNA!!E
Field Descriptien, Centents, Meaning
TBQBCRT
TRQBDEV
TRQNAME
TRQBPOLL
urEFELOK is used
oFerations.
Hexadecimal
Displacement
TaCEDEV
device support is
UDEFDASD
UDBFVADD
Field
Nalle
Field Descripticn, Contents, Meaning
UDBFWORK DS
UDBFVADD DS
UDBFDASD DS
7D
UDBFSIZE EQU
(*-UDBFBLOK)/8 UDEFELOK size in doutlewords (X'08')
IF
IF
Euffer work space used by the caller
Virtual address of the last directory page
DASD address of the last direct cry page
IEM VM/370 Data Areas and Centrol Block Legic
UDEVBLCK
UDEVBLOK supplies the information about the virtual machine's virtual devices# the
operational parameters for its use# such as DASI access passwords# read/write link mode#
spool device# T-disk space versus dedicated device space# as well as other Farameters.
,
o
UDEVADD
UDEVDISP
8
U* 1 I U*2
U*3 I U*4
10
U*5 I U*6 I
UDEVPASR
20
UDEVPASi
28
UDEVPASM
------------
Field
Name
UDEVADD
UDEVDISP
UDEVDASD
UDEVSTAT
Field Descriptien, Contents# Meaning
DS
DS
DS
DS
1H
1H
1F
1X
-~------------------------------------
U*1
] it.§ g~!JJl~g in UDEVSTAT
UDEVDED EQU --X'80'---UDEVTDSK EQU
X'40'
UDEVLONG EQU
X'20'
"TI lO'lJT 1l'T'I11
X'10'
RQU
UDEVSPOO EQU
X'08'
UDEV3158 EQU
X'04'
UDEVVRR EQU
X'02'
U~.I.II
9
• .£,I,I.\.,IJ.
UDEVMODE DS
1X
UDEVTYPC
UDEVTYPE
UDEVFTR
UDEVMDL
DS
IS
IS
DS
1C
1C
1C
1C
Virtual device address
Displacement of the next block
DASI address of the next block
Device status information
Device to be dedicated te this user
T-disk to be allocated
Device block is full length (6 doublewords)
Device is te be linked (at legon)
Device is a spool device
Device is a 3158 console
Virtual reserve/release requested
U*2
]!1.§ g~!!!!~g in UDEVMODE
EQU --X'80'--UDEVLR
UDEVLW
EQU
X'40'
UDEVLM
EQU
X'20'
UDEVR
00
EQU
UDEVRR
04
EQU
UDEVW
08
EQU
UDEVWR
EQU
12
EQU
UDEVM
16
UDEVMR
EQU
20
EQU
UDEVMW
24
A
E
C
D
UDEVNCYL
UDEVVSER
UDEVRELN
18
Hexadecimal
Displacement
0
2
4
8
unEVDAS!)
Access mode information
Read links allowed
Write links allcwed
Multiple write links allowed
Device to be in R link mode for owner
Device to be in RR link mode for owner
Device to be in W link mode for owner
Device to be in liR link mode for owner
Device to be in M link mode for owner
Device to be in MR link mode for owner
Device to be in MW link mode for owner
U*3
U*4
U*5
U*6
Virtual device class
Virtual device type
Device feature codes
Device model number
D
E
10
ORG
UDEVCLAS DS
UDEVLINK DS
UDEVLKID DS
UDEVMDL
1C
1H
1D
User device block (short)
Speel device output class
User link tc disk
User link tc userid
E
10
12
UDEVNCYL DS
UDEVRELN DS
UDEVVSER DS
1H
1H
6C
Virtual DASD size
Virtual DASt cylinder relocation
Volume identification number
Section 1. CP Lata Areas and Centrel Elocks
109
U~EVELOK,
UDIRBLOK
Hexadecilllal
tisplacelllent
Field
Nallle
-----------18
20
28
Field Descriptien, Contents, Meaning
UDEVPASR DS
UDEVPASW DS
UDEVPASM DS
1D
1D
1D
Passwerd for read access
Password for write access
Passwerd for multiple access
UDEVSIZE EQU
(*-UDEVBLOK)/8 UDEVELOK size in
doutlewor~s
U~IRELOK contains data
describing the user's ce.mand privilege
machine options, terminal line edit values, and ether values.
o
(X'06')
classes, special virtual
r,---------------------------------------------------------,
1//UDIRRSV1///1 UDIRDISP 1
UDIRDAsr
1
1---------------------------------------------------1
8 1
UDIRUSER
1
1
I
10 1
UDIRPASS
I
Hexadecillal
I:isplacement
-----------0
2
4
8
10
Field
Name
UDtRR-SV1
UDIRDISP
UDIRDASD
UDIRUSER
UDIRPASS
Field Description, Centents, Meaning
DS
DS
DS
DS
DS
UDIRSIZE EQU
110
lH
1H
1F
1D
1D
Reserved for IBM use
DisFlacement of the user's UMACELOK
DASI: address of the user's UMACELOK
Userid
User Fassword
(*-UDIRBLOK)/8 UDIRELOK size in doutlewords (X'03')
IBM VM/370 Data Areas and Centrol Block Legic
U1UCBLCK
UMACELOK contains the logon parameters for one virtual machine user. This block Frovides,
in addition to the linkage to the user's defined virtual machine device UDEVELOK, the
command privilege class, assigned line edit values, as well as other virtual machine
°Ftions.
o
UMACDVCT
UMACDISP
8
U* 1 I U*2
U*3 I U*4
10
UMACACCT
20
UMACDIST
28
UMACIPL
------------
UMACPUID
U*9 1/////////UMACRSV2///////////
Field
Name
UMACDVCT
UMACDISP
UMACDASD
UMACCLEV
Bi!§
Field Description, Contents, Meaning
1H
1H
1F
1C
DS
DS
DS
DS
.§gt!~§g
UMACCLA
UMACCLB
UMACCLC
UMACCLD
UMACCLE
UMACCLF
UMACCLG
UMACCLH
9
A
UMACMCOR
18
Hexadecimal
tisFlacement
0
2
4
8
U*5 I U*6 I U*7 , U*8
UMACCORE
30
,
UMACDASD
~ ~
..Loll
-------------------------------------U*1
TlMlI,.,.T
li'V
u,u.'O ............. ~.J.J. ...
EQU --X'80'---EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
ErlTt
\o!u
X'04'
EQU
EQU
X'02'
X'01'
1X
1X
UMACPRIR DS
OMICOPT DS
~.!!§ g~!.!1!~g
UMACISIM
UlU CECO P
UMACRT
UMACVROP
UMACACC
UMACRSV4
UMACNSVC
EQU
EQ U
EQU
EQU
EQU
EQU
EQU
UMICBMX
EQU
111
Num1:er of devices
DisFlacement of the next block
DASI: address of the next block
Command level flags
!!~!~Q~1
X'80'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
Privilege
Privilege
Privilege
Privilege
Privilege
Privilege
Privilege
privilege
U*2
U*3
Class
Class
Class
Class
Class
Class
Class
Class
A
B
C
D
E
functions
functions
functions
functions
functions
F functions
G functions
H functions
Virtual machine priority
Virtual machine option flags
ISAM CCW checking option
Extended control mode optien
Real timer eption
Virtual = Real storage option
Accounting card option
Reserved for IBM use
SVCs not handled by virtual machine
feature
Virtual block multiplexer channel
assist
Section 1. CP I:ata Areas and Centrel Elocks
111
UMICBLOK
Hexadecimal
Displacement
B
Field
Name
Field Description, contents, peaning
UMACOPT2 DS
lC
U*4
Processor identification number on option
statement
VMSAVE on oFtion statement
U!UCVMSV EQU
X'10'
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1C
lC
1C
1C
1F
1F
1D
1D
1D
XL3
0*5
U*6
U*7
U*8
10
14
18
20
28
30
UMICLEND
UMACLDEL
UMICCDEL
UlUCES
UMACCORE
UMACMCOR
UMICICCT
UMICDIST
OMICIPL
OMICPOID
33
UMACAFF
DS
lX
U*9
C
D
E
F
Virtual machine option flags
Terminal line end symbol
Terminal line delete symbol
Terminal character delete symbol
Edit escape symbol
Virtual storage size in bytes
Maxi.um virtual storage size in bytes
Accounting information
User machine distribution information
Name of system to te IPLed at logon
Processor identification number
in tinary
Affinity and processor address
Affinity specified
Processor address for "affinity
34
112
UMACRSVR DS
1F
UMACSIZE EQU
(*-UMACBLOK)/8 UMACELOK size in doutlevords (X'06')
Reserved for IBM use
IBM VM/370 Data Areas and Control Block Logic
Virtual I/O Control Blocks
The base
fer locating the
I/O block
structure is the user's Virtual Machine
Central
Block
(VMBLOK) •
The
VMELOK
contains a pointer to the start of three
control block tables, and a table of 16
channel indexes. The control block tables
contain one block for each of the virtual
channels, control units, and devices that
are defined for the user's virtual machine.
The entries in the channel index table
(VMCHTBL)
contain the pointers to each
channel defined for the user in the table
of Virtual Channel Blocks (VCHBLOKs). Each
VCHBLOK contains a table of pointers that
peint to the Virtual Control Unit Blocks
(VCUELOKs) for the control units attached
to that virtual channel.
Each VCUBLOK
contains pointers to the Virtual Device
Elocks (VDEVBLOK)
attached to the control
unit.
Thus, if given the unit address of any
component in the form cuu, the appropriate
control blocks representing each component
in the subchannel path to the given unit is
located via the indexing scheme.
VIRTUAL CHANNEL BLOCKS
There
is
ene Virtual
Channel
Block
(VCHELOK)
for
each
virtual
channel
connected te the user's virtual processor.
Each VCHBLOK contains the channel address
and flag
indicating the
channel type
(selector, byte
multiplexer, or
block
multiplexer).
The status of the channel
and its attached units are represented by
several status and mask bytes.
•
A
status byte
(VCHSTAT)
indicates
whether the channel is busy or has a
channel class interrupt pending.
•
A halfword unit address identifies the
unit causing the channel-class interrupt
(if it is present).
•
A halfword mask
(VCHCUINT) contains a
bit map of the attached control units
that have interrupt status pending.
Following these status flags and masks
is the table of indexes pointing to the
attached
VCUELeKs;
index
entries
reFresenting addresses at which no control
unit is attached have a value of -1.
VIBTUAL CCNTROL UNIT ELOCKS
There is one Virtual Centrol Unit Block
(VCUBLOKj
for each contrcl unit in the
virtual configuration. These blocks are
arranged in a table, each contains: in
addition to its base address, status flags
similar te those in the VCHELCK and a table
of indexes to attached VDEVBLOKs.
The
status flags defined for the VCUBLCK differ
frem these for the VCHELCK ,in that they can
centain status for the centrol unit and
alse for a subchannel.
For example, if the VCUELOK representing
a 2803 taFe control unit is attached to a
virtual selector channel, both the VCHBLCK
and the VCUBLeK are marked busy.
However,
if the VCUBLCK is attached to a virtual
byte multiplexer channel and is for a
central unit on a selector subchannel of
the multiplexer, the busy status of the
channel is reflected in the VCUBLOK only.
Thus, the virtual byte multiplexer appears
nonbusy te operations on other, nonshared
subchannels.
VIBTUAL DEVICE BLOCKS
There
is
one
Virtual
Device
Block
(VrEVBLCK)
in the configuration for each
virtual device defined by the user.
Each
VtEVBLOK contains the device portion of the
unit address,
device status,
and the
virtual CSW for the last interrupt taken by
the device.
In addition, the VDEVBLCK
contains device type specific information
that
allows the
I/O translation
and
simulation
routines te
interpret
the
channel programs presented by the user.
IS!!:
The
VCHBLCK, VCUELOK,
VDEVBLCK,
VFCEBLOK, and VSPXELOK
DSECTs are all
contained in the VELOKs COpy file.
Section 1. CP tata Areas and Contrel Blocks
113
VCHBLOK
VCHBLOK contains information providing linkage between the virtual machine and one ef its
virtual channels. SUPFlied in this block, in addition to channel status and type
information, are the reflected interrupts from attached virtual centrol units..
The
VMCHSTRT field of the VMBLOK points to the first VCHELeK.
o
8
VCHADD
VCHCUINT
VCHCEDEV
-------.,
I V*l
1 V*2
I
------------------------------------------------1
VCHCUTBL
1
-------'
Hexadecimal
I:isplacement
------------
Field
Nalle
Field Description, Contents, Meaning
0
2
4
VCHADD
DS
VCHCUINT DS
VCHCEDEV DS
1H
1H
1H
6
VCHSTAT
1X
DS
V*l
~~!!.!!~g in VCHSTAT
VCHBUSY EQU --X'80'--VCHCEPND EQU
X'40'
VCBDED
EQU
X'Ol·
It!!§
7
VCHTYPE
!!!!§
114
1X
Virtual channel busy
Virtual channel class interruft pending
virtual channel dedicated
V*2
in VCHTYPE
EQU --X'80'--EQU
X'40'
~~!!.!!~g
VCHSEL
VCHBMX
8
DS
Virtual channel address
VCUELOK with interrupt-bit map
Virtual device address with channel class
interrupt
Virtual channel status
Virtual channel type
Virtual selector channel
Virtual block multiplexer
VCHCUTBL DS
16H
Contrel units attached -
VCHSIZE
(*-VCHBLOK) /8
VCHEIOK size in doublewords (X'OS')
EQU
IBM VM/370 Data Areas and Centrol Block Legic
V~CUSTRT
index
VCONCTL
VCONCTL contains CCW and data buffer informaticn for the communicaticns of
ccnsole. The VDEVCON field of the VDEVBLOK points to VCONCTL.
o
r
the virtual
,
1
VCONCAW
VCONBUF
1
1---------------------------------------------------1
8 1
VCONCCW
1
1
1
10 I/V*1//1 V*2 I/V*3//I/ V*4//1
VCONIDAP
1
1
18 1
"'"
VCONRBUF
1
~v
Hexadecimal
tisplacement
o
Field
Name
DS
DS
DS
1F
1F
1D
ORG
DS
DS
DS
DS
VCONCCW
1F
E
VCONADDR
VCONFLAG
VCONDWC
VCONCNT
ORG
VCONCOMD DS
VCONADDR
8
10
11
12
13
14
VCONRSV1
VCONBFSZ
VCONRSV2
VCONRSV3
VCONIDAP
DS
DS
DS
DS
DS
1X
1X
1X
1X
18
1C
1E
1F
20
24
26
27
VCONRBUF
VCONRCNT
VCONRBSZ
VCONRSV6
VCONWBUF
VCONWCNT
VCONWBSZ
VCONRSV8
DS
DS
DS
DS
DS
DS
DS
DS
1F
1H
8
8
C
D
VCCNRCNT
V*5 1//V*6//1
VCCNWCN'I
V*7 IIIV*8//1
1
Field Descripticn, Contents,
VCONCAW
VCONBUF
VCONCCW
4
1
VCONSIZE EQU
Virtual address of user CCw
Pointer tc data buffer
Current user ccw
CCW data
CCW flag
Diagnose
CCW byte
1X
1X
1H
1X
V*1
V*2
V*3
V*4
V*5
V*6
1F
1H
1X
1X
address
bits
write control
count
CCW command code
1F
1X
1X
~eaning
V*7
V*8
(*-VCONCTL)/8
Reserved for IBM use
Data buffer size in doublewords
Reserved for IBM use
Reserved for IBM use
For indirect data addressing pointer
to current IDAW
Address of read data buffer
Data count in read buffer
Read buffer size in doublewcrds
Reserved for IBM use
Address of write data buffer
Data count in write buffer
Write buffer size in doublewords
Reserved for IBM use
VCONe'lL size in doublewords
(X 1 05 1 )
Section 1. CP tata Areas and Contrel Blocks
115
VCOBLOK
VCOBLOK contains status information relating to the virtual channel, and the status and
features of the virtual control unit.
The VftCOSTRT field of the VftELCK foints to the
first VCUELOK.
o
VCODVINT I
VCUADD
-----------0
2
4
6
Field
Nalle
VCOADD
VCODVINT
VCOINTS
VCOSTAT
VCUTYPE
DS
DS
DS
DS
1H
1H
1H
1X
V*1
DS
1X
116
virtual ccntrol unit address
VDEVELOK with interrupt - bit map
Virtual control unit interrupt status
Virtual centrol unit status
Virtual suhchannel busy
Interrupt pending in suhchannel
Virtual control unit busy
Virtual control unit interrupt pending
Virtual centrol ufiitend pending
Virtual centrol unit active
V*2
1!1!§ g~!!J1~g in VCUTYPE
VCOSHRD EQO --X'80'--VCUCTCA EQU
X'40'
8
I
I
I
Field Descriptien, centents, fteaning
1!it§ g~!1~g in VCOSTAT
VCOCHBSY EQO -X'80'-VCUCEPND EQO
X'40'
VCUBUSY EQO
X'20'
VCUPEND EQU
X'10'
VCUCOEPN EQO
X' 08·'
VCUACTV EQU
X'04'
7
-------,
I V*1 I V*2
VCUDVTBL
8
Hexadecimal
risplacement
VCOIBTS
virtual centrol unit type
Virtual centrol unit on shared subchannel
Virtual centrol unit is a channel-to-channel
adapter
VCUDVTBL DS
16H
Devices attached - VftDVSTRT index
VCUSIZE
C*-VCUBLOK)/8
VCUELCK size in doublewords (X'CS')
EQU
lEft VM/370 Data Areas and Contrel Elock Logic
VDEVELCK
VtEVELOK maintains status and interrupt conditions
field of the VMBLOK points to the first VDEVBLOK.
0
VDEVA:CD
VDEVINTS
for one virtual device.
The VMDVSTBT
V*1 I V*2 I V*3 I V*4
VDEVCSW
8
10
VDEVPCSN
VDEVBND
VDEVRELN
18
VDEVQUED
VDEVOFER
20
VDEVLINK
VDEVREAL
28
VDEVIOCT
VDEVUSER
30
VDEVIOER
VDEVICB
1/////VDEVRES1/////1
VDEVRRB
38
V*5
L--
Eexadecimal
:Cisplacement
o
2
4
5
6
Field
Name
VDEVA-DD
VDEVINTS
VDEVTYPC
VDEVTYPE
VDEVSTAT
Field Description, Contents,
DS
DS
DS
DS
DS
~it§ g~!:!.n~g
VDEVCHBS
VDEVCHAN
VDEVBUSY
VDEVPEND
VDEVCUE
VDEVNRDY
VDEVCATT
VDEVDED
7
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
VDEVFLAG DS
~:!1§ g~!:!.n~g
VDEVRDO
VDEVENAB
VDEVTDSK
VDEVDIAL
VDEVCSPL
VDEV231T
VDEV231B
VDEVCCW1
VDEVSAS
VDEVDLY
VDEVDET
VDEVPOST
VDEVRSRL
VDEVUC
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
1H
1H
1X
1X
1X
V*1
V*2
V*3
Virtual
Virtual
Virtual
Virtual
Virtual
device
device
device
device
device
~eaning
address
interrupt status
type class
type
status
in VDEVSTAT
--X'80'----
Virtual subchannel busy
Virtual channel interrupt rending
Virtual device busy
Virtual device interrupt pending
Virtual control unit end
Virtual device not ready
Virtual device attacbed by console function
VDEVREAL is dedicated device RDEVBLOK
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
1X
V*4
Virtual device flags
in VDEVFLAG
-X'80'--X'80'
X'40'
X'40'
X'40'
X'20'
X'10'
X'10'
X'08'
X'08'
X'04'
X'02'
X'02'
X'01'
DASD - read-only
Virtual 270x - line enabled
DASt - T-disk space allocated by CP
Virtual 270x - line connected
Conscle - activity spooled
DAS:C - 2311 simulated on tcp balf of 2314
DASt - 2311 simulated on bcttom half of 2314
Conscle and spooling - processing first ccw
DASt - Executing standalone seek
Ccnscle - delay spooling
Virtual device is being detached
Fresent attention with a single interrupt
Reserve/release are valid CCW 0Feraticn codes
Virtual device sense bytes present
Secticn 1. CP :Cata Areas and Contrcl Blocks
117
VtEVELOK
Hexadecimal
Displacement
Field
Name
Field Description, Contents. Meaning
1D
1H
1H
1F
1F
1F
1F
Virtual channel status word
Virtual DASt cylinder relocation
Virtual DAst size (in cylinders)
Virtual DASD seek position
Virtual SIO to real SIO queued time
Device operational time
Link to virtual shared devices
ORG
VDEVTMAT DS
VDEVLINK
1F
T-disk attached time (TOD clock word 0)
24
28
2C
30
VDEVREAL
VDEVIOCT
VDEVUSER
VDEVIOER
1F
1F
1F
1F
Pointer
Virtual
Pointer
Pointer
30
34
ORG
VDEVSNSE DS
VDEVFCBK DS
VDEVIOER
1F
1F
Sense bytes for spool device
Address of forms control block (VFCBELOK)
34
38
VDEVIOB DS
VDEVFLG2 DS
1F
1X
10
12
14
18
1C
20
VDEVCSi
VDEVRELN
VDEVBND
VDEVPOSN
VDEVQUED
VDEVOPER
VDEVLINK
20
8
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
V*5
to real device RDEVELCK
device I/O count
to VMBLOK of VDEVBLeR owner
to IOERELOK for last error
Pointer to active IOELOK
virtual device flag tyte 2
~1!~ g~!1]~g
VDEVRRF
VDEVRES
VDEVODE
39
3C
in VDEVFLG2
EQU --X'80'---EQU
X'40'
EQU
X'20'
VDEVCPEX EQU
X'10'
VIRTUAL
X'01'
EQU
Process virtual RESERVE/RELEASE commands
Minidisk reserved by VDEVUSER
VDEVELOK to get device when minidisk
is released
Virtual I/O waiting for release of
minidisk
Viri~aldevice is known by t~e virtual
machine as a 3330V
VDEVRES1 DS
VDEVRRB DS
3X
1F
Reserved for IBM use
Address of VRRELOK for RESERVE/RELEASE
VDEVSIZE EQU
(*-VDEVBLOK)/8 VDEVELOK size in dQutlewords (X'07')
~EQQJ1]gL~Q~£J~ Q~~1f~~
10
14
18
1C
20
21
22
24
26
VDEVEXTN
VDEVSPAR
VDEVCON
VDEVSPL
VDEVCLAS
VDEVKEY
VDEVUNIT
VDEVCOPY
VDEVCFLG
ORG
DS
DS
DS
DS
DS
DS
DS
DS
DS
VDEVRELN
1F
1F
1F
1F
1C
1X
1H
1H
1X
Pointer to spool extension block
Spare pointer tc sFool extension block
Pcinter to VCONCTL console control
Pointer to VSPLCTL sFool centrol
SFocl outFut class
Storage key in user's CAW
Spool output directed device address
Number of copies requested
Conscle - virtual console flags
~1!§ g~!i~~g
in VDEVCFLG
VDEVATTN EQU --X'80'---VDEVTIC EQU
X'40'
VDEVTRAN EQU
X'20'
VDEVVCF EQU
VDEVAUCR EQU
118
X'10'
X'08'
User pressed Attention key two or more times
Last CCi precessed was a TIC
Data transf€r occurred during this channel
Fregram
Virtual censole function in Frogress
Automatic carriage return en first read
IBM VM/370 Data Areas and Centrel Block Legic
VDEVBLCK
Eexadecimal
Eisplacement
-----------27
Field
Name
Field Description, Contents, Meaning
VDEVSFLG DS
lX
in VDEVSFLG
12.!!§ Q§!.!]§Q --x
-;1i'0-;---VDEVFEED EQU
VDEVXFER
VDEVCONT
VDEVHOLD
VDEVFOR
VDEVEOF
VDBVTERM
VDEVCFCL
VDEVPURG
VDEVDIAG
VDEVSVC
EQU
EQU
EQU
EQU
BQU
BQU
EQU
BQU
EQU
BQU
X'80'
X'40'
X'20'
X'10'
X'08'
X'08'
X'04'
X'02'
X'02'
X'Ol'
Spcol - virtual spool flags
Spool reader - last command was a feed
spool output - transferred to VDEVXUSR
Spocl device - continuous cperation
Hold cutput - save input
Spool output - for user and distribution
spool input - set unit exceFtion at EOF
Terminal output required fcr spooled console
Device closed by console function
Spool output - purge file at close
Spocl input - device opened by DIAGNOSE
Spool device busy by CP
Section 1. CP Data Areas and Control Blocks
119
VFCBELOK, VMAELOK
VFCBBLOK is exclusively used for virtual 3211 printer carriage contrcl forms activity.
,
0
VFCBCNT
V*1
8
VFCBSPAR
V*3
V*2 I
VFCEWORK
10 •
I
I
I
I
VFCBLOAD
Hexadecimal
tisplacement
Field
Name
Field Description, Contents, Meaning
-----------VFCBCNT DS
VFCBFLAG DS
0
2
1H
1X
V*1
Current Fointer to carriage column
Working flag byte
~i!§ g~!iQgg
3
4
8
A
E
VFCBEOF
VFCBCMD
in VFCBFLAG
EQU --X'80'---EQU
X'40'
VFCBCHL
VFCBWORK
VFCBSPAR
VCFImD-EX
VFCBLOAD
DS
DS
DS
DS
DS
VFCBSIZE EQU
1X
1F
2X
1X
CL181
End-cf-forms passed once
Forms control given
V*2
V*3
Channel numler or space count
Work area
Spare
Index byte value
Forms control buffer area
(*-VFCEELOK) /8 Size in doullewords (X' 18')
VMABLOK contains the name of a shared system, a pointer to the share table (SHRTAELE),
and a pointer to the next VMABLOK. The VMA55IST field in the VMEICK Foints to the
VMABLOK.
o
VMAFPNT
VMANAME
8
Hexadecimal
tisplacement
-----------0
4
8
Field
Name
Field Description, Contents, Meaning
VMAFPNT DS
VMASHREK DS
VMANAME DS
VMASIZE
120
VMA5HRBK
1F
1F
CL8
EQU (*-VMABLOK) /8
Forward pointer to next VM!ELCK
Address of share table (SHRTAELE)
Identification of named shared system
VMAELCK si ze in dour lewords (X' 02')
IBM VM/370 Data Areas and Central Block Logic
VMELCK
VMELOK is used as the primary control block for almost all activities related to a single
virtual machine. This block contains the following information: the disFatch and priority
level of the virtual machine, the virtual machine's processor registers, preferred
virtual machine option values, and otber
values significant tc virtual machine
oFerations. The ASYSVM field of the PSA points tc the system VMELOK.
,
I
0
VMQFPNT
VMQBPNT
1201
8
VMPNT
VMECEIT
128
10
VMSEG
VMSIZE
13C VMiCN'!
10
TFM"'U~""l'lm
lfI:J\..U.;I.LU.L
VMCUSTRT
i3E
VMIOCNT
VMPNCH
20
VMDVSTRT
VMTERM
14C
VMLINS
VMCRDS
IV
VMDIS'I
VMPGREAD
VMPGWRIT
IVMSEGDSP
VMSTOR
28 VMVTERM
IVMTRMID
IV*1 IV*2 IV*3 IV*4
148
30 VMCHCNT
IVMCOCNT
IVMDVCNT
15C /VMFDROM/I/VMPDISK/IVMPAGES
IVMIOACTV
VMCHTBL
381
158 VMDEBCH
1
581V*5 IV*6IV*7 IV*8 IV*9 IV*10IV*11IV*12
I
VMLOCKER
60IV*13IV*14IV*15IV*161
I
68IV*19IV*20IVMIOINT
1
VMVTIME
70!
78
VMTMOOTQ
80
VMTTIME
88
VMTMINQ
90
VMTODINQ
VMCOMND
IVMQPRIOR IVMWSPROJ IVMSTEALS
16C
VMTIMEON
VMTRQBLK
1E8
VMACCONT
VMRDINQ
17C
VMPGRINQ
VMEPRIOR
178
VMSTKO
VMMICRO
18C
VMPFONC
VMPXINT
188
VMDELAY
VMRPRIOR
19C
VMPGPNT
VMNDCNT IVMSBRSYS
VMTIMER
198 V*21IV*22IV*26IV*271
98
AO
VlHNST
IVMPRGIL
VMASSIST
1AC
VMCPNT
VMCPOID
I/V*25/
1A8
VMLOCK
VMDFTPNT
1EC
VMOSER1
VI10SER2
1E8
VMOSER3
VI10SER4
1ce
VMOBS
VMPCKP
IV*17IV*18
VMTREIT
VMADSTOP
A8
VMPSW
EOI
VMGPRS
1C8
1------------------------------------VMFPRS
FOI
1------------------------------------VMOSER
1101
1------------------------------------1181
VMACNT
VMXPG
1
1DCI
I c* 1 1C*2
VMSWPMIG
VMSTKCNTI VI1PRRCT
IC*3IC*4IV*28 IV*29
1------------------------------------VMCPTIME
1D81
1-----------------------------------VMAFTIM!
1EC,
1------------------------------------IV*30IHSVDI VI1CONLN
1E81 VMAC'IDEVI
I
1FCI
V~FLPAG
VMCONBOF
IV*311//RESERVED///
Section 1. CP Data Areas and Control Blocks
121
VMBLOK
Hexadecimal
Displacement
-----------a
4
8
C
10
14
18
1C
20
24
28
2A
2C
2D
2E
2F
30
32
34
36
38
58
Field
Nalle
Field Description, Ccntents, Meaning
VMQFPNT
VMQBPNT
VMPNT
VMECEXT
DS
DS
DS
DS
1F
1F
1F
1F
Pointer to next VMELCK in queue
Pointer to previous VMELCK in queue
Pointer (CYCLIC) to next VMELCK
VMBLCK extended control pointer - ECELOK
VMVCRO
EQU
VMECEXT
Virtual control register
virtual machine
VMSEG
VMSIZE
VMCHSTRT
VMCUSTRT
VMDVSTRT
VMTERM
VMVTERM
VMTRMID
VMTLEND
VMTLDEL
VMTCDEL
VMTESCP
VMCHCNT
VMCUCNT
VMDVCNT
VMIOACTV
VMCBTBL
VMRSTAT
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
1F
1F
1F
1F
1H
1H
1C
1C
1C
1C
1H
1B
1H
1H
16H
1X
Pointer to VMSEGTBL
Virtual temporary storage size in bytes
Pointer to VCHBLOK table
Pointer to VCUBLOK table
Pointer to VDEVBLOK table
Pointer to BDEVELOK for user terminal
Displacement to virtual console VDEVBLOK
Resource ID of real terminal if 370x
Terminal line end symbol
Terminal line delete symbol
Terminal character delete symbol
Terminal escape symbol
Virtual channel count
Virtual control unit count
Virtual device count
Active channel mask
Channels attached - VMCHSTBT index
Virtual machine running status
V*1
V*2
V*3
V*4
V*5
a
for non-EC mcde
~i!§ g~!!~~g
in VMRSTAT
VMCFWAIT EQU --X'80'--Waiting - Executing console function
i-KPGi.AITE-Q-U-X'40 ~W-aitin-g. - P-ag.ingop_e.r_ation (s)
VMIOWAIT EQU
X'20'
Waiting - Scheduled IOELOK start
VMPSWAIT EQU
X'10'
Waiting - Virtual PSW wait state
VMEXWAIT EQU
X'08'
Waiting - Instruction simulation
VMLOGON EQU
X'04'
User not logged on
VMLOGOFF EQU
X'02'
User logging off
VMIDLE
EQU
X'01'
Virtual machine in idle wait state
VMCPWAIT EQU
VMCFWAIT+VMPGWAIT+V~IOWAIT+VMEXWAIT+VMLCGCFF+VP.LOGON
VMNORUN EQU
VMCPWAIT+VMPSWAIT
VMLONGWT EQU
VMCFWAIT+VMLOGON+VMLCGOFF+VMIDLE
59
VMDSTAT
DS
~i!§ g~!!~~g
VMDSP
VMTSEND
VMQSEND
VMTIO
VMRUN
VMINQ
VMELIG
VMPAZAPL
122
1X
in VMDSTAT
EQU --X'80'-EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
EQU
X'02'
EQU
X'01'
V*6
Virtual machine dispatching status
Virtual machine is dispatched run user
Virtual machine is compute bound
Virtual machine in-queue time slice end
Virtual machine is in TIO busy loop
Virtual machine runnable
Virtual machine in a queue
Virtual machine in eligible list
Use dispatch path DMKDSPCH
IBM VM/370 Data Areas and Control Block Logic
VMBLCK
Hexadecimal
tisplacement
SA
Field
Name
VMOSTAT
Field Description, Ccntents, Meaning
DS
~i
1X
V*1
t§ g~:t!~g in VMOSTAT
VtISYSOp EQU
VMSHR
EQU
X'40'
VMSLEEP EQU
X'20'
VMDISC
EQU
X'10'
VMCFRUN EQU
X'OS'
5B
--xiaoi--
VMVIRCF
EQU
X'04'
VMCF
VMKILL
EQU
EQU
X'02'
X'01'
VMQSTAT
DS
1X
~it§ g~!!1!~Q
5C
VMPRIDSP
VMAUTLOG
VMWSERNG
VMDLDRP
VMWSCHG
VMINHMIG
VMCFREAD
VMPA2APL
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
VMPSTAT
DS
~it§ g~!!1!~Q
VMISAM
VMV310R
VMRPAGE
VMREAL
EQU
EQU
EQU
EQU
VMt~OTRAt~ EQU
VMNSHR
EQU
VMACCOUN EQU
VMPAGEX EQU
5D
VMESTAT
DS
Virtual machine is system eFerator
Virtual machine running shared system
Virtual machine is in SLEEf state
Virtual machine console disconnected
Virtual machine running in console function
mode
Virtual machine executing virtual console
function
Virtual machine executing censole function
Virtual machine is to te legged off
V*S
!11 !!i~21!1
X'SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
1X
V*9
Virtual machine processing status
Virtual machine has ISAM CCW checking
Virtual machine can use extended format
Virtual machine can reserve Fages
Virtual machine has virtual=real option
No ccw translation fer virtual=real user
Running nonshared named saved system
Virtual machine may Funch account cards
Virtual machine receiving Fseude page faults
V*10
~!!§ g~!!1!~Q in VMESTAT
5E
Virtual machine queueing status
Virtual machine eligible fcr queue 1
Autologged user is in discennect mode
Last working set errcr was negative
Delayed queue drop flag
Force a new working set en queue entry
Page migration switch
Virtual machine with console function read on
Reflects external interrupts to machine
!11 !!1R21!1
X'SO'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
1X
Virtual machine operating status
Virtual machine control status
VMSHADT
VMPERCM
VMBADCRO
VMMICSVC
EQU --X'80'--EQU
X'40'
EQU
X'20'
EQU
X'10'
VMEXTCM
VMNEWCRO
VMINVSEG
VMINVPAG
VMECZAP
EQU
EQU
EQU
EQU
EQU
X'OS'
X'04'
X'02'
X'01'
255-VMMICSVC
Shadew tatles are Fresent
Virtual CP fER active
Virtual control register 0 is invalid
User wants SVCs done by virtual machine
assist feature
Virtual machine in extended control mode
Virtual control register 0 has changed
All shadow tables invalid
Shadow page tables invalid
All tits except VMMICSVC
VMTRCTL
DS
1X
Virtual machine tracing contrel
~!!§ g~!!1!~Q
VMTRPER
VMTRSVC
VMTRPRG
VMTRIO
VMTREX
VMTRPRV
VMTRSIO
VMTRBRIN
in VMTRCTL
EQU --X'80'--EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'OS'
EQU
X'04'
EQU
X'02'
EQU
X'01'
VMTRINT
EQU
V*11
Virtual PER tracing active
Trace user SVC instructions
Trace virtual program interruFts
Trace virtual I/O interrupts
Trace external interrupts
Trace user Frivileged instructions
Trace virtual I/O instructions
Trace successful branches er all
instructicns
VMTRSVC+VMTRPRG+VMTBIO+VMTREX Trace all user interrupts
Section 1. CP rata Areas and Control Blocks
123
VMBLOK
Hexadecimal
Displacement
5F
Field
Name
Field Description, Contents, Meaning
1X
VMMLEVEL DS
V*12
!t!1§ g~!.!!l~g in VMMLEVEL
VMMSGON EQU --X'80'---VMWNGON BQU
X'40'
VMMCODE BQU
X'20'
VMMTEXT BQU
X'10'
VMMLINBD BQU
X'08'
VMMACCON BQU
X'04'
VMMCPENV EQU
X'02'
VMMSTMP BQU
X'01'
60
VMQLEVEL DS
~.!1§ g~!.!!l~g
61
1X
!ll
EQU
EQU
EQU
EQU
EQU
EQU
EQU
VMDROP1
EQU
X'02'
VMFS
EQU
X'01'
VMCLEVEL DS
Receiving messages
Receiving warnings
Receiving error message codes
Receiving texts of error messages
Line editing on
Receiving accounting information
Terminal in CP .ode
Time stamp desired on conscle output
V*13
!11~1~!!1
VMQ1
VMCOMP
VMHIPRI
VMLOPRI
VMAEX
VMAEXP
VMQ3
V*14
in VMCLEVBL
EQU --X'80'---EQU
X'40'
EQU
X'20'
BQU
X'10'
EQU
X'08'
BQU
X'04'
EQU
X'02'
BQU
X'01'
~.!1§ g~!.!!l~g
VMCLASSA
VMCLASSB
VMCLASSC
VMCLASSD
VMCLASSE
VMCLASSF
VMCLASSG
VMCLASSH
62
VMTLEVEL DS
1X
Queue level
Virtual machine is interactive
Virtual machine is compute bound
Virtual machine is highest Friority
Virtual machine is lowest Frierity
Virtual machine is assured execution
Virtual macbine is assured percentage
Virtual machine using multiple Q2. Note
that this bit is used only by the fair
share scheduler.
Virtual machine droPIed frem Q1. This
bit is used only by the standard scheduler.
Using more than fair share flag
X'80'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
1X
Message level
Command level
Privilege Class A functions
privilege Class B functions
privilege Class C functions
privilege Class D functions
privilege Class E functions
Privilege Class F functions
Privilege Class G functions
Reserved for IBM use
V*15
Timer level
~it§ g~!!!l~g
in VMTLBVEL
VMTON
EQU --X'80'---VMRON
EQU
X'40'
VMCPUTMR BQU
1'20'
124
VMSTMPI EQU
VMSTMPT BQU
VMTMRINT EQU
X'08'
X'04'
X'01'
~.!1§ !~g~!.!!l~g
VMTIDLE
VMTPAGE
EQU
BQU
!2! ~1§!~.!!!
VMTON
VMRON
VMTIONT
BQU
VMSTMPI
Virtual timer running
Virtual real timer running
Virtual processor timer in real processor
ti.er
Virtual interval timer request queued
Virtual processor timer request queued
Interrupt from processor real timer pending
!MBLQ~
Processor timer contains idle wait state time
Processor timer contains systell Fage wait
time
Processor timer contains I/O wait state time
IBM VM/370 Data Areas and Control Block Logic
VMBLeK
Hexadecimal
tisplacement
63
Field
Name
VMPEND
Field Description, Contents, Meaning
DS
~i!.§ g~!1!!~£
VMDEFSTK
VMPERPND
VMPRGPND
VMSVCPND
VMPGPND
VMIOPND
VMEXTPND
64
68
EQU
EQU
EQU
EQU
EQU
EQU
EQU
VMLOCKER DS
VMFSTAT DS
~.!!§ £~!.!lt~£
69
VMFBMX
VMFAUTO
VMFVTMR
VMNPiDCL
EQU
EQU
EQU
EQU
VMMLVL2
DS
1X
V*16
Interrupt pending summary flag
in VMPEND
=-x·~rO'--
Deferred task wait fer system lock
Virtual PER interrupt pending
Virtual program interrupt deferred
Virtual SVC interrupt deferred
Virtual pseudo page fault pending
Virtual I/O interrupt pending
Virtual external interrupt pending
X'40'
X'20'
X'10'
X'08'
X'02'
X'01'
1F
1X
V*19
Ease address of holder of VMLCCK
Virtual machine feature status
in VMFST1T
--X'80'---
Virtual block multiplexer channels
Autcpcll handshake option in use
User requested virtual timer assist enabled
Virtual machine requests password suppression
X'40'
X'20'
X'04'
1X
V*20
Additional message handling information
Receiving all informational messages
1H
1F
1D
1D
1D
1D
I/O interruFt pending flags
Virtual timer value - X'50'
Virtual processor time used
Time remaining in queue 1 and/or queue 2
Total time while in supervisor state
VMTTIME value at entry to queue
VMTSOUTQ EQU
VMTMINQ
Supervisor time allowed (redefine label)
90
98
VMTODINQ DS
VMINST
DS
1D
3H
9E
9F
AO
A4
A8
BO
FO
110
118
120
128
12C
130
132
VMUPRIOR DS
VMPSiDCT DS
VltTREXT
DS
VMADSTOP DS
VMPSi
DS
VMGPRS
DS
VMFPRS
DS
VMOSER
DS
VMACNT
DS
VMDIST
DS
VMPGREAD DS
VMPGiRIT DS
VMiCNT
DS
VMSEGDSP DS
1H
1X
1F
1D
16F
4D
CL8
CL8
CL8
1F
1F
1H
1H
134
138
13C
140
144
148
150
152
154
156
158
15A
15C
VMSTOR
VMIOCNT
VMPNCH
VMLINS
VMCRDS
VMCOMND
VMPDRUM
VMPDISK
VMPAGES
VMPRGIL
VMDEDCH
VMQPRIOR
VMiSPROJ
1F
1F
1F
1F
1F
CL8
1H
1H
1H
1H
1H
1H
1H
TOD clock time stamp at queue entry
Virtual machine privileged er tracing
instruction
User priority from directory
Invalid LINK password count
Address of extended trace control block
Address of address stop control block
Virtual machine PSi
Virtual machine general purFose registers
Virtual machine floating-peint registers
Virtual machine identification
Virtual machine accounting number
Virtual machine distribution code
Total page reads
Total page writes
Page wait count
Displacement of virtual machine SEGTABLE from
start of tlock
Permanent storage size (in bytes)
Virtual SIO count for nonspooled I/O
Virtual card count - spooled punch
Virtual line count - spooled Frinter
Virtual card count - spooled reader
Last CP command executed
Reserved for IBM use
Reserved for IBM use
Number of real pages currently resident
ILC for latest program interrupt
Mask for dedicated channel
priority in dispatching queue
Projected working set size
6A
6C
70
78
80
88
VMIOINT
VMTI!!ER
VMVTIME
VMTMOUTQ
VMTTIME
VMTMINQ
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
iF
V*17
V*18
Section 1. CP tata Areas and Contrel Blocks
125
VMBLOK
Hexadecimal
Displacement
Field
Name
Field Descriptien, Contents, Meaning
15E
160
164
168
16C
170
VMS TEALS
VMTIMEON
VMTRQBLK
VMACOUNT
VMRDINQ
VMPGRINQ
DS
DS
DS
DS
DS
DS
lH
lF
lF
IF
IF
IF
174
178
17C
VMEPRIOR DS
VMSTKO
DS
VMMICRO DS
IF
IF
IF
17C
VMMCR6
ORG
DS
Number of waits for stolen pages
Logon time -- TOD clock word 0
Address of TRQBLOK for real timer
Address of user ACCTELOK
Page read tetal (VMPGREAD) at queue entry
Sum ef virtual machine pages count at each
page read
Eligible list priority
Conscle function output stack peinter
Virtual machine assist - real central R6
VMMICRO
Cant reI register 6 - hardware flag byte
11
~i!§ g~!i~~g
17D
lao-
184
188
18C
190
194
196
198
199
VMMFE
VMMPROB
VMMNOSK
in VMMCR6
EQU --X'80'-EQU
X'40'
EQU
X'20'
VMM360
EQU
X'10'
VMMSVC
VMMSHADT
VMMCPAST
VMMVTMR
EQU
EQU
EQU
EQU
X'08'
X'04'
X'02'
X'Ol'
VMMADDR
DS
3X
Contrel register 6 - address ef virtual
machine's pointer list (~ICELOK)
V!t-F-FUNC
DS
'tF
VMPXINT
VMDELAY
VMRPRIOR
VMPGPNT
VMNDCNT
VMSHRSYS
VMRESC
VMCXSTAT
DS
DS
DS
DS
DS
DS
DS
DS
1F
1F
IF
1F
1H
lH
1X
lX
-table
Extended external interrupt stack pOinter
TRQELOK for delayed SLEEP cr LOGOFF
Run list dispatching priority
Peinter to list of pages in PGBLOK
Nondeferred page read count
Number of shared named ~ystems
Remote display line count
VMCF status byte
Virtual machine assist feature enabled
Virtual machine in problem state
Virtual machine assist dOes not handle SSK,
or ISK
S/360 operations only; no EC mode operations
allowed
Virtual machine assist does net handle SVCs
Shadew tatles present (EC mode and translate)
CP assist feature enabled
Virtual interval timer assist feature enabled
~Fn-nfu-n-ct len
V*21
V*22
~i!§ g~!!~~g
in VMCXSTAT
VMBCAUTH EQU --X'80'---VMIOLOG EQU
X'20'
19A
VMCF active
I/O logout mask bit from control register
14. Referenced through VMVCRI4 .•
VMVCRl4
EQU
VMCXSTAT V*22
Contains I/O logout mask bit from control
register 14 (for both EC and BC mode).
During EC mode, control register 14 data is
alsc kept in the ECBLOK.
VMAFF
DS
lX
Affinity request field
V*26
~!!§ g~!!~~g
19B
19C
lAO
lA4
lA7
lA8
lAC
lBO
lB4
126
VMAFFON
VMAFFAD
in VMAFF
EQU -X'40'-DS
OBL6
VMLSTPRC
VMASSIST
VMCPNT
VMCPUID
VMNOECPS
VMLOCK
VMDFTPNT
VMUSERl
VMUSER2
DS
DS
DS
DS
DS
DS
DS
DS
DS
lX
IF
1F
Affinity set on
Precessor aadress
V*27
31
lX
1F
IF
IF
IF
V*25
Last processor executed in problem state
Pointer to list of VMAELOKs
VMCELOK anchor
Processor identificatien number in binary
Reserved for IBM use
Lock word fer compare and swap locking
Deferred task pointer
Reserved for installation use
Reserved for installation use
IBM VM/370 Data Areas and Central Block Logic
VMBLCK
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
1F
1F
1F
1B8
1BC
1CO
1C4
1C8
1CA
1CB
1CC
1CE
1DO
1D4
1D5
1D6
VMUSER3
VMUSER4
VMUHS
VMPCKP
VMXPG
VMQ2CNT
VMQ3CNT
VMSTKCNT
VMPRRCT
VMSiPMIG
VMFVRF
VMCRTO
VMSHRPRC
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1D7
Vl'lGRFTAB
VMCPTIME
VMAPTIME
VMACTDEV
DS
DS
DS
DS
VMFLPAG
DS
1D
1D
1H
lH
VMSPMFLG DS
11
1D8
1EO
1E8
lEA
1EC
1ED
1EE
1FO
1F4
1F5
1F
1H
1X
1X
1H
1H
1F
1X
1X
1X
C*3
C*4
V*28
11
V*29
C*1
C*2
V*30
Reserved for installation use
Reserved for installation use
Recent history of user processor utilization
User page read checkpoint
Maximum virtual machine pages count in-queue
Consecutive queue 2 count
Count of consecutive Q2s allowed
Count of stacked ICB plus CPEXBICKs
Processor related stacked CPEXBICKs
Pointer to pseudo page table
SET FAVORED percentage for user
COMPUTE/ELAPSED ratio
Processor (main or attached) wbose shared
segments were last used
GRAF virtual console logical tab
Main processor supervisor time
Attached processor supervisor time
Virtual device address for last virtual SIC
Count of nonshared flushed pages
VMCF special message flag
§it§ g~!!y~g in VMSPMFLG
VMSPMON EQU --X'40'---VMSMSGON EQU
X'20'
Receiving special messages
processing special messages
RESERVED
VMCONLN
VMCONBUF
VMPSWDCA
RESERVED
DS
DS
DS
DS
DS
1X
1H
3X
Reserved for IBM use
Bytes left in response buffer
Virtual address of response buffer
Invalid AUTCLOG password ceunt
Reserved for IBM use
VMBSIZE
EQU
(*-VMBLOK) /8
VMELOK size in doutlewords (X'38')
1F
1X
V*31
Section 1. CP Lata Areas and Contrel Blocks
127
VMCBlOR
VMCBlOK contains data transfer and status information used by the Virtual Machine
Communicaticn Facility (VMCF). The VMCPNT field of the VMBLOK points to VMCELOK.
0
V*1
VMCFUNC
I V*2
VMCUSER
8
10
VMCVADA
VMCLENA
18
VMCVADE
VMCLENB
VMCUSE
20
VMCFPNT
28
I V*3
Hexadecimal
~isplacement
I V*4
I V*5
I/V*6//
VMCTOD
30
o
VMCIHD
Field
Name
VMCSTAT
I
I
Field Description, Contents, Meaning
DS
1X
V*1
VMCElOK user status
~1!§ g~!1~~Q
1
2
4
8
10
14
18
1C
20
28
2C
2D
VMCRESP
VMCRJCT
VKCPRTY
in VMCSTAT
EQU --X'80'--EQU
X'40'
EQ-U .
X:' 2'()' .
VMCEFlG
VMCFUNC
VMCMID
VMCUSER
VMCVADA
VMClENA
VMCVADB
VMClENB
VMCUSE
VMCFPNT
VMCKEY
VMCCSTAT
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1X
1H
1F
1D
1F
1F
1F
1F
1D
1F
1X
1X
Final response interrupt
Message rejected
pri.c.ri tym.essag.e
V*2
V*3
V*4
Data transfer return code
Subfunction code
Message identifier
Source and/or sink userid (VMUSER)
Vaddr of message buffer
Length of message
Vaddr of reFly buffer (SENI/RECV only)
Length of reply buffer (SENt/BECV only)
User-supplied dcubleword
Address of next VMCBLOK
User PSi key
VMCElOR control status
~1!§ g~!1D~g
in VMCCSTAT
VMCCXINT EQU --X'80'---VMCCRECP EQU
X'40'
VMCCBUSY EQU
X'20'
2E
VMCASTAT DS
1X
External interrupt VMCELOK
TranEacticn processed
VMCELOK busy
V*5
~1!§ g~!1D~Q
in VMCASTAT
VMCAAUTS EQU --X'80'---VMCAPRTY EQU
X'40'
VMCAQIES EQU
X'20'
2F
30
V-MCRSB1
VMCTOD
DS
DS
VMCBSIZE EQU
R~g~!1D1!igD
VMCACNT
128
EQU
1X
1D
Authcrized specific
Authcrized Friority
User is quiescent
V*6
(*-VMCBlOR)/8
!g!
VMCELOR authorization status
Reserved for IBM use
TOD at authcrization and/or build operation
VMCELCK size in doublewords
~g§!~! !~~~1Q!
VMCFUNC
Active message count
IBM VM/370 Data Ar.eas and Control Block Logic
VMCMHDH
VMCMHDR provides information to identify the sFecial VMeF external interrupts.
o
V*1
VMCMFUNC
I V*2
VMCMEID
VMCMUSER
8
10
VMCMVADA
VMCI1LENA
18
VHCMVADB
VMC~LENE
20
VMCMUSE
28
VMCMBUF
(Optional Message Euffer)
Hexadecimal
tisplacement
o
Field
Name
Field Description, Contents, Meaning
VMCMSTAT DS
1X
V*1
Message status tyte
~i!§ g~!i~~g
in VMCMSTAT
VMCMRESP EQU --X'80'---VMCMRJCT EQU
X'40'
VMCMPRTY EQU
X'20'
1
2
4
8
10
14
18
1C
'1n
£v
28
VMCMEFLG DS
VMCMFUNC DS
VMC~MID
DS
VMCMUSER DS
VMCMVADA DS
VMCMLENA DS
VMCMVADB DS
VMCMLENB DS
VMCMUSE DS
VMCMBUF DS
ox
Data transfer return code
subfunct~on c?d; (original request)
Message 1dent1f1er
Source and/or sink userid (VMUSER)
Virtual buffer address
Message length
Virtual reply buffer address
Reply buffer length
USer supplied doubleword
Opticnal SENDX data tuffer
VMCMLEN
(*-VMCMHDR)
VMCMEDR size in bytes
EQU
1X
1H
1F
1D
1F
1F
1F
1F
Final response interrupt
Message rejected
pricrity message
V*2
11'\
• .u
Section 1. CP rata Areas and Centrol Blocks
129
VMCPARM
VMCPARM contains the user-supplied parameters when a VMCF
Register 1 in the Diagnose instruction points to VHCPAR!!.
o
V*1
I/V*2//1
VMCPUSER
10
VMCPVADA
VHCPLENA
18
VMCPVADE
Vf!CPLENE
Hexadecimal
Displacement
o
executed.
VMCPMID
VMCPFUNC
8
20
subfuncticn is
VMCPUSE
L - -______.____________________________________________.____
Field
Name
VMCPFLG1
~
Field Description. Contents, Meaning
DS
1X
V*1
V.HCPARM flag byte
Bits defined in VMCPFLG1
VKCPAUTS--EQU--X'SO'---1
2
VMCPPRTY
VMCPSMSG
EQU
EQU
X'40'
X'20'
VMCPFLG2
VMCPFUNC
DS
DS
1X
1H
Authcrize specific request
Priority message
Receiving special messages
V*2
Reserved for IBM use
Sub function code
Bits defined in VMCPFUNC
VKCPRJCT--EQU--X'OOO~
VMCPIDEN
VMCPRESM
VMCQUIE
VMCPREPL
VMCPCANC
VMCPRECV
VMCPSENX
VMCPSENR
VMCPSEND
VMCPUAUT
VMCPAUTH
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'OOOA'
X'0009'
X'0008'
X'0007'
X'0006'
X'OOOS'
X'0004'
X'0003'
X'0002'
X'0001'
X'OOOO'
10
14
18
VMCPMID
VMCPUSER
VMCPVADA
V.HCPLENA
VMCPVADB
DS
DS
DS
DS
DS
1F
1D
1F
1F
1F
1C
20
VMCPLENB
VMCPUSE
DS
DS
1F
1D
4
8
VMCPLEN
130
EQU
(*-VMCPARM)
REJECT
IDENTIFY
RESU!!F
QUIESCE
REPLY
CANCEL
RECEIVE
SENDI
SENt/RECEIVE
SENt
UNA U'IHORIZE
AUTHCRIZE
Message identifier
Target userid
Virtual address of message buffer
Length of message
Virtual address of reply buffer (SEND/RECEIVE
only)
Length of reply buffer (SENt/RECEIVE only)
User supplied doubleword
Length of VMCPARM (bytes)
IBM VM/370 Data Areas and Centrol Block Legic
VRRBLCK
VRRBLOK is linked to the VDEVBLOK and contains
VDEVRRB field of the VDEVBLOK Foints to VRRBLOK.
o
usage.
The
r--------------------------------------------------------,
VRRAtD
I V*1 I/V*2/ I
VRBCPEX
I
-----------1
8
Hexadecimal
tisplacement
informaticn about minidisk
VRRUSER
1//////////VRRRSV2//////////1
Field
Name
Field Descripticn, Contents, !eaning
-----------0
2
VRRADD
VRRSTAT
DS
DS
iH
1X
V*1
Minidisk is reserved
2
8
VRRRSV1
VRRCPEX
VRRUSER
C
VRRRSV2
3
4
Reserved virtual device address
Virtual RESERVE/RELEASE status flags
VRRSIZE
DS
1X
1F
DS
1F
DS
reserved
DS
1F
EQU
V*2
(*-VRRBLOK)/8
Reserved for IBM use
Queued request for the minidisk
V!ELCK of the user who has the minidisk
Reserved for IBM use
Size in doutlewords (X'02')
Secticn 1. CP Bata Areas and Control Blocks
131
VSPLCTL
VSPLCTL is linked to the VDEVBLOK and contains information for
VtEVSPL field of the VDEVBLOK points to VSPLCTL.
o
VSPCAW
VSFDPAGE
8
VSPVPAGE
VSFRECNO
10
VSPNEXT
VSPIDACT
20
Hexadecimal
Displacement
o
4
8
C
10
12
14
18
20
24
28
29
2C
VSFSFBLK
VSPBUFBK
VSFMISC
VSPIDAL
V*1 I
VSFIDAW2
Field
Name
VSPCAW
VSPDPAGE
VSPVPAGE
VSPRECNO
VSPNEXT
VSPIDACT
VSPSFBLK
VSPCCW
VSPBUFBK
VSPMISC
VSPIDASW
VSPIDAL
VSPIDAW2
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
VSPSIZE EQU
VSPBUFSZ EQU
132
The
VSPCCW
18
28
opened spool files.
1F
1F
1F
1F
1H
1H
1F
1D
1F
1F
1X
3X
1F
V*1
(*-VSPLCTL) 18
(200) 18
Virtual address of user CCW
tASt locaticn (DCHR) of current page buffer
Virtual address of page buffer
Reccrds remaining in current buffer
Displacement in buffer of next record start
Data byte count of in~irect data address ccw
Pointer to SFBLCK for file
Current user CCW
Address of a buffer area
Use varies according to caller
Indirect data address work flag
Address of indirect data list
Contains IDAW2
Size in doutlewords (X'06')
Size in doutlewords (X'19')
IBM VM/310 Data Areas and Control Block Logic
VSPXBLOK
VSPXBLOK serves as an extension to the virtual spool control block (VSPLCTL). It contains
the user named destination of the file as well as RSCS tag information used by the Remote
Spooling Communications Subsystem.
o
I
V*1 I V*2 I V*3 I V*4 I/////////VSPISPAR////////////I
8
VSPXDIST
10
VSPXXUSR
18
VSPXCHAR
VSPXFCB
20
VSPXCl!lOD
VSPIOVLY
28
Hexadecimal
Displacement
o
1
2
3
VSPXTAG
Field
Name
VSPILEN
VSPXTGLN
VSPXFLSH
VSPXFLG1
Field Description, Contents, l!leaning
DS
DS
DS
DS
11
11
11
1X
V*1
V*2
V*3
V*4
VSPXELOK length (doublewords)
VSPITAG data length (bytes)
3800 flash count
3800 flag byte
If this D1~ 1S set, mu~t1ple copies
can be sent in one transmission
10
VSPXSPAR DS
VSPXDIST DS
VSPXXUSR DS
XL4
CL8
CL8
18
1C
20
24
VSPXCHAR
VSPXFCB
VSPICl!lOD
VSPIOVLY
CL4
CL4
CL4
CL4
4
8
DS
DS
DS
DS
Reserved for IBl!l use
Virtual device distribution code
Virtual machine user to whom the file
transferred
3800 character arrangement table
3800 forms control buffer
3800 copy modification
Name of flash overlay to be used
is
(*-VSPIBLOK)/8 VSPXBLOK header in doublewords
28
VSPXTAG
DS
VSPXSIZ2 EQU
CL136
Tag application data area
(*-VSPXBLOK)/8 VSPIBLOK size in doublewords
Section 1. CP Data Areas and Control Blocks
133
XINTELOK
XINTELOK saves the various types of external interrupts that are presented to the virtual
machine. If multiple external interrupt conditions are simultaneously [resented, as
indicated by values presented in the block, code exists for handling the interruFts in
their defined hierarchical order. The VMPXINT field of the VMBLeK points to XINTBLOK.
o
8
Hexadecimal
tisplacement
-----------0
4
6
8
A
C
XINTNEXT
XINTCODE I XINTMASK
Field
Nalle
XINTNEIT
XINTSORT
XINTCPUA
XINTCODE
IINTMASK
XINTPARM
I lINTCPUA
XINTFARM
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
XINTSIZE EQU
134
XIN~SORT
1F
1H
1H
1H
1H
1F
Address of next external interruFt block
Left half of interrupt collating key
Right half of interrupt collating key
External interrupt code
Control register 0 mask (bits 16-31)
External interrupt parameter word
(*-XINTBLOK)/8 XINTELOK size in douklewords (X'02')
IEM VM/370 Data Areas and Control Block Logic
XOBR3211
XOBR3211 is aFpended to the IOERBLOK to contain sense data and other data associated with
I/O errors and error recovery for devices that generate more than 24 bytes of sense
information.
50
XOBRCCW1
58
XOBRCCW2
60
XOBRCCW3
68
XOBRCCW4
70
XOERIUS2
XOBRMIS1
X*1 I X*2 I
78
XOBR512
278
XOBR180
XOBR010
330
r
1/////////////////XCERVS1/////////////////
.J
Hexadecimal
tisplacement
-----------50
58
60
68
70
Field
Name
Field Descriptien, Centents, Meaning
XOBRCCW1 DS
XOERCCW2 DS
XOBRCCi3 DS
XOBRCCW4 DS
XOBRFLAG DS
1D
1D
1D
1D
1X
--------------------------------------
X*1
~!1§ Q~t!!!~Q in XOERFLAG
XOBRT1
XOERT2
XOBRT3
71
EQU --X'80'--EQU
X'40'
EQU
X'20'
XOBRSTAT DS
1X
Bits defined in XOBRSTAT
XOBBRT1--EQU --X'80'---XOBRRT2 EQU
X'40'
XOBRRT3 EQU
X'20'
XOBRRT4 EQU
X'10'
XOBRRT5 EQU
X'08'
XOBRRT6 EQU
X'04'
XOERRT7 EQU
X'02'
XOERRT8 EQU
X'01'
CCW used
used
CCW used
CCW used
Outbeard
cei
to read OBR information
to read OER information
to read OEB infcr:ation
to read OBR information
recording flag byte
T1 Euffer type information Fresent
T2 Euffer type inforllation present
T3 Euffer type information present
X*2
Outbeard recording status tyte
Perferm
Perferm
Perform
Perferm
Perferm
Perferm
Perferm
Perferm
routine
routine
routine
routine
routine
routine
routine
routine
1
2
3
4
5
6
7
8
in
in
in
in
in
in
in
in
error
error
error
error
error
error
error
error
module
module
module
module
module
module
module
module
Secticn 1. CP rata Areas and Contrcl Blocks
135
XOBR3211
Hexadeciaal
Displacellent
------------
Field
Balle
Field Description, Contents, Meaning
72
74
78
278
330
331
XOBRMIS1
XOBRMIS2
XOBR512
XOBR180
XOBR010
XOERSV1
DS
DS
DS
DS
DS
DS
1H
1F
CLS12
CL184
CL10
CL6
Used cy the error routine
Used cy the errcr routine
Space for USCB data
Space for FCB data
Space for first ten error characters
Reserved for IBM use
278
XOBR150
ORG
DS
XOBR180
CL150
Redefinition for PLB check
Space for PLB check data
XOBRSIZE EQU
XOBREXT EQU
136
IB~ V~/370
(*-IOERBLOK) /8 Size of IOER and XOBR in dcublewords (X'67')
(*-XOBRCCW 1) /8 Size of XOBR3211 in double words (X'SE')
Data Areas and Control Block Logic
Section 2.
CMS Data Areas and Control Blocks
This section contains CMS data areas and
control blocks.
relationships between the control blocks and data areas of CMS.
Figure
2
shows
the
Section 2. CMS tata Areas and Central Blocks
137
DMSNUC
Free Storage - - - - - - -
CMSCB
DECB
FREELIST
I
CMSAVE
I
EJ
MAINLIST
TXTDIRL
MACDIR
PRECMND
LASTCMND
Legend:
The projection of SYSREF is a
sampling of areas within NUCON.
NUCON
(See Legend)
SYSNAME
INSTALID
SYSTEMID
Figure 2. CMS Control Block Relationships
AETAE
AETAE contains one 8-byte entry for the background partition.
Bytes 0-3 contain the
address of the entry point of the user's abnormal terminatien routine. Eytes 4-7 centain
the address of a 72-byte save area used by the supervisor to store the interrupt status
information and the contents of the general registers. The IJBABTAE field in the SYSCCM
tlock in the DOSCON CSECT of NUCON points to the ABTAE tlock.
o
Hexadecimal
Displacement
-----------0
4
138
r-----------------------------------------.----------------,
AESAVE
ABROUT
I
Pield
Nalle
Pield Description, Contents, Meaning
ABROUT
ABSAVE
DC
DC
P'O'
P'O'
Address of user termination routine
Address of supervisor save area
ABTAB
EQU
*-8
Abend option tatle
IBM VMj370 Data Areas and Central Block Logic
AEWSECT
AEWSECT describes the fields used for saving registers and other data during abend'
recovery. V-constants in D!SABN, DMSDEG, D!SFRE, D!SITI, DMSITP, and tMSITS point to the
AEWSECT block. ABWSECT is defined in module DMSAEW.
0
ABNREGS
AENPSW
40
48
ABNRR
II,..
"t~
ABNPAS13
90
Hexadecimal
tisplacement
o
40
48
4C
94
4C
Field
Name
Field Description, Ccntents, Meaning
ABNREGS
ABNPSW
ABNRR
ABNPAS13
§£g~
!2f
DS
DS
DS
DS
16F
D
F
18F
Registers at time of abend
PSi at time of abend
Tempcrary save area
Area passed to nucleus rcutines
~~§!SS g1I§~
ORG
ABNERLST DS
ABNPAS13
471
Secticn 2. CMS tata Areas and Control Blocks
139
AI:TSECT
ArTSECT describes the attributes of virtual disks (A-G, S, Y, Z) accessed by a virtual
machine via the ACCESS command. Space is allocated for the ADT when DMSNUC is assembled.
In the ADT, certain fields are defined for use ty both CMS and OS. Fer example, ADTBECT
field at displacement 1C (hexadecimal) into AIT5ECT is also defined as eSADTVTl for use
by OS simulation routines. lDTSECT is invoked by the ArT macro.
0
6
1*1
8
ADTPTR
lDTDTA
10
ADTFDA
ADTMFDN
18
ADTMFDA
lDTBECT
20
ADTFSTC
ADTCBEA
28
ADTCFST
lDT1ST
30
ADTNUM
lDTUSEI
38
ADTLEFT
lDTLAST
40
ADTCYL
48
ADTMSK
ADTQQM
50
ADTPQM1
ADTPQM2
58
ADTPQM3
ADTLBBA
60
ADTLFST
68
ADTXNREC
Hexadecimal
Iisplacement
o
ADTID
A*3
AtTNACW
ADTID
ADTFLG3
A*5 I
A*6
ADTRES
ADTXAREC
Field
Name
!§~deg
1*4
A*2
Field Description, Contents, Meaning
!2f ~~gg-Q~lY
DS
CL6
DS
1X
~!§!§ g~g ReggLWr!!~
A*1
Dis!§
Disk identifier (label)
Third flag tyte
Bits defined in ADTFLG3
iDTFUiiD'-EQU --X'80'--ADTFXCBN
ADTFRWOS
ADTFSORT
ADTFORCE
ADTFNOAB
EQU
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'08'
X'04'
10
14
ADTFTYP
ADTPTR
ADTDTA
ADTFDA
ADTN
DS
DS
DS
DS
DS
1X
1A
1A
1A
1F
18
1C
1C
ADTMFDA DS
OSADTVTA DS
ADTBECT DS
1A
OF
1F
7
8
C
140
First half of DMSAUD has been called
Extra chain link(s) to be returned
Read/write CS or Des disk
All FST hyperblocks and FST entries sorted
CMS/reS/os disk forced to a read-only
For rMSAUI routine: Do not abend
if it is a disk error
A*2
Filetype flag byte
Pointer to next ADT tlock in chain
Device tatle address in NUCCN
File directory (PSTAT) address
Number of doublewords in master
file directory
Master file directory address
VTOC address of OS pack
FST byperblock count
IEM VM/370 Data Areas and Centrol Block Logic
ADTSECT
Hexadecimal
Displacement
------------
Field
Name
Field Description, Contents,
20
24
24
28
28
2C
ADTFSTC
OSADTFST
ADTCHBA
OSADTVTB
ADTCFST
ADT1ST
DS
DS
DS
DS
DS
DS
1F
OF
1A
OF
1F
1F
30
30
34
34
38
3C
40
44
45
46
OSADTDSK
ADTNUM
OSADTSV1
ADTUSED
ADTLEFT
ADTLAST
ADTCYL
DS
DS
DS
DS
DS
DS
DS
ADT!!
DS
ADTMX
ADTFLG1
DS
DS
OF
1F
OF
1F
1F
1F
1F
1C
1C
1X
A*3
A*4
A*5
~:!!§ Q~!:!1!~Q in ADTFLG1
47
ADTFSF
ADTFRO
ADTFRW
ADTFFSTF
ADTFFSTV
ADTFQQF
ADTROX
ADTFMIN
EQU --X'8'O'-EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
EQU
X'02'
EQU
X'01'
AFTFLG2
DS
1X
~eaning
Number of FST 40-byte entries (files)
Address of first OS FST
Pointer to current.FST hyperblock
Upper VTOC address of OS pack
Displacement of current FSi entry
Displacement of first word in bit mask with
"hole"
OS disk address (cuu)
Number of records (NUMTRKS)
Save area
Number of records in use (~TUSEDP)
Number of records left (QTLEFTP)
Displacement of last nonzero byte in bit mask
Number of cylinders cn disk (NUMCYLP)
Mode letter (A;B;C; ...... ;S;Y;Z)
Extension-of-mode letter (A,E,C, ••• ,S,Y,Z)
First flag tyte
ADT tlock in free storage
CMS read-only disk (attached and ready)
CMS read/write disk (attached and ready)
First FST hypertlock is in free storage
FST hypertlocks are of varying lengths
200-tyte QQ~SK is in free storage
This disk has read-only extension(s)
ADT tlock is minimum size
A*6
Secend flag byte
~:!!§ Q~!:!1!~Q in ADTFLG2
ADTPSTM
ADTFROS
ADTFDOS
MFD is in storage
EQU --X'8'O'--EQU
X'40'
All filenames are in storage
li20;
All filetypes are in storage
EQU
EQU
X'10'
Modes 1 through 5 are in storage
EQU
ADTFMDRO.X'08' All medes (0 through 5) are in storage
EQU
ADTFMFD+ADTFALNM+AriFALTY+ADTFALMD
All UFD is in storage
EQU
X'02'
ADT fSTAT chain modified
Xi 04 i
EQU
Indicates this is an U~ Q1sk
EQU
Indicates this is a DOS disk
X'01'
ADT2ND
DS
ADTFMFD
ADTFALNM
ADTFALTY
ADTFMDRO
ADTFALMD
ADTFALUF
48
!!g~deQ
!Q!
OD
!!~~QL!!:!te
48
4C
50
ADTMSK
ADTQQM
ADTPQM1
54
ADTPQM2
DS
1F
58
5C
60
ADTPQM3
ADTLHBA
ADTLFST
DS
DS
DS
1F
1A
1F
64
66
ADTNACW
ADTRES
DS
1H
1H
!!Q!~
68
DS
DS
DS
rs
1A
1A
1F
Di§!§
800-tyte (P~MSK) bit-mask address
200-tyte (P~QMSK) bit-mask address
PQMSIZ equals number of bytes in PQMSK is
greater than 215
PQMDUM equals number of 80C-byte records for
PQ"SK
RONU~ equals number of doublewords in PQMSK
Pointer to last FST hyperblock (see Note)
Displacment of last FST in last hyperbleck
(see Note)
Number of active write files -- halfword
Reserve count (RESRVCNT) -- halfword
Applies to all CMS disks except fer the S-disk.
ADTXNREC DS
1F
Number of doublewords of extra chain link
records
Section
~.
eMS rata Areas and Contrel Blocks
141
ADTSECT
Hexadecimal
Displacement
6C
Field
Name
Field Description, Contents, eeaning
1F
ADTLBM
ADTLDM
EQU
EQU
ADT2ND-ADTSECT Length of minimum ADT block (in bytes)
ADTLBM/8
Length of minimum ADT blcck in dcublevords
ADTLB
ADTLD
EQU
EQU
*-ADTSECT
(ADTLB+7)/8
Q!her Parameters
ADTRL ---EQU---aoo
ADTMIBML EQU
10
~Q£ON Q~!!f~
DTAD
DTADT
DTAS
142
Address of tlock of extra chain link records
ADTIAREC DS
EQU
EQU
EQU
Table
--0-3
4
Length of full ADT block (in bytes)
Length of full ADT block in dcublevords
Lcgieal reccrd length
Maximum bit map length (number ef records)
for 3330
Q!§E1gf~~~!§
Device number
Device type byte
5ymbelic device name
IBM VMj370 Data Areas and Central Block Logic
AFTSECT
AFTSECT is used te describe a file currently open for a read or write. The AFT is created
when a file is opened. Space fer up to five AFTs is availatle in tMSNUC; any others must
reside in free storage. AFTSECT is invoked via the AFT macro.
o
8
r--------------------------------------------------------,
AFTCLD
AFTCLN
AFTCLA
AFTDBD
AFTDBN
10
60
AFTCLB
AFTFCLA
A*2
80
AFTT
AFTD
AFTIC
AFTIL
AO
AFTADT
Hexadecimal
Displacement
------------
AFTID
AF'I'FCLX
AFTCLDX
AFTiP
AFTM
98
AFTIN
1///////////////////////////
AFTN
90
0
2
4
8
A
C
10
AFTOCLDX
1/////1
78
88
0
0
A4
A8
14C
150
1F4
1F8
29C
2AO
344
348
AFTPFST
A*1
68
70
AFTDBA
AFTRP
AFTFCL
AFTtEC
A*3
A*4
AFTYR
AFTPTR
Field
Name
Field Description, Contents,
~eaning
!f1i!~
Xile !~bl~ 12!gf~
AFT START DS
OD
DC
41F'0'
DC
A (*+4)
DC
41F'0'
DC
A (*+4)
DC
41F'0'
DC
A (*.4)
DC
41F'0'
DC
A (*+4)
DC
41F'0'
DC
A (0)
DC
2F'0'
!f1iv~ Xil~ !~Bl~
AFTCLD
AFTCLN
AFTCLA
AFTDBD
AFTDBN
AFT DBA
AFTCLB
DS
DS
DS
DS
DS
DS
DS
H
H
F
H
H
F
XL80
First AFT l:lock
Second AFT l:lock
Third AFT block
Fourth AFT tlock
Fifth AFT block
Address of next AFT tlock (in free storage)
Reserved for IBM use
Disk address of current chain link
Numter of current chain link
Address of chain link buffer
Disk address of current data block
Number of current data block
Address of current data tlcck
Chain link tuffer frcm first chain link
Section 2.
C~S
Data Areas and Contrel Blocks
143
lFTSECT
Hexadecimal
Displacement
Field
Name
60
AFTFLG
Field Description, Contents, Meaning
DS
x
A*1
~.!!§ ~~!.!1l~~ in AFTFLG
EQU
--X'80'-
AFTICF
AFTFBA
AFTDBF
AFTWRT
AFTRD
AFTFULD
EQU
EQU
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
AFTPFST
AFTIN
lFTID
AFTFCLA
AFTFCLX
AFTCLDX
AFTFLG2
DS
DS
DS
DS
DS
DS
DS
1FT USED
61
64
66
68
6C
6E
70
Active file table l::lock in use
Reserved for IMB use
First chain link in storage
Full l::uffer assigned
Data block in storage
Active write
Active read
Full disk special case
3X
H
H
F
H
H
X
A*2
~.!!§ ~~!.!1l~~ in AFTFLG2
AFT NEW
AFTOLDCL
AFTCLX
SA!UEN
71
72
74
78
78
80
88
8C
8E
90
92
94
96
97
98
9C
9E
AO
A4
EQU
EQU
EQU
EQU
DS
AFTOCLDX DS
DS
--X'80'---
Pointer to (static) FST entry
Current item number
Displacement of current item in data block
Address of first chain link
Disk address of swapped FCl
Disk address of swapped chain link
Seccnd flag byte
New file
Current chain link existed previously
Alternate chain link assigned/implied
Force same length update
X'40'
X'20'
X'01'
1X
1H
Reserved for IBM use
Old value (if any) of AFTCLDX
Reserved for IBM use
F
f9EI 9! f§I
AFTFST
AFTN
AFTT
AFTD
AFTWP
AFTRP
AFTM
lFTIC
AFTFCL
AFTFV
AFTFB
AFTIL
AFTDBC
AFTYR
AFTADT
AFTPTR
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
~.!! ~~!.!!!~g
lFTFSF
A8
AFTLB
AFTLD
144
Flag l::yte
D
D
F
H
H
H
H
H
C
X
F
H
H
F
F
in AFTPTR
A*3
A*4
Filename
Filetype
Date/time last written
Write pointer (item no.)
Read pointer (item no.)
File.ode
Item count
First chain link
Fixed (F)/varial::le(V) flag
FST flag byte
(Maximum) item length
800-l::yte data block count
Year
Pointer to active disk table
Pointer to next AFT l::lock in chain
X'40'-
Indicates in free storage
DS
OD
End cf DSECT
EQU
EQU
*-AFTSECT
AFTLB/8
Length of AFT block in bytes
Length of AFT block in doul::lewords
EQU
IBM VM/370 Data Areas and Control Block Logic
ANCHSECT
This DSECT is used by DMSDCS when a CDLOAD
ANCHSECT defines the DOS/VS anchor table.
(SVC 65) is issued, and the phase is not found in either the CMSVSAM or CMSAMS segment.
In this case, the specified phase is loaded either from a CMS DOSLIB or a tOS core image
library, and the name, load point, entry point, and the length in bytes, of the phase are
saved in an available slot in the anchor table.
ANCHSECT is invoked by the ANCHTAE
macro,.
0
ANCHENDA
8
ANCHCBS
,
11/11/1/1111/1111/1///1////11
ANCHOAL
10
ANCHPHNM
18
20
Hexadecimal
tisplacement
o
4
8
C
10
18
1C
20
ANCHLDPT
A*1
ANCHENTP
ANCHPHLN
Pield
Name
ANCHENDA DC
DC
ANCHCBS DC
lNCHOAL DC
Pield Description, Contents, Meaning
A (0)
P'O'
A (0)
A (0)
End address of anchor table
Reserved for IBM use
Pointer to VSAM AMCB table
Pointer to VSAM OAL (OPEN ACE) table, which
is followed by one or more Anchor
Tatle entries
Fermat
!l!fhof ~~~1~ Entries ana Their ---ANCHPHNM DC --CL8'-'--Phase name
ANCHLDPT DC
Load point
A (0)
ANCHENTP DC
Entry point
A (0)
ANCHSTSW DC
A*1 Status switc!i
X'OO'
BJ:!§
~~~J:!!§g in ANCBSTSW
ANCHMLOD EQU --X'OO'---ANCHINST EQU
X'7F'
ANCHRPJL EQU
X'PP'
21
I
I
I
I
I
I
ANCHLENG EQU
ANCHSIZ EQU
20
1024
Phase must te loaded
Phase is already in storage
Requested phase just loaded ty another task
(only if AP=YES)
Length of one anchor table entry
Default size of anchor table (in bytes)
ANCHPHLN DC
AL3 (0)
Length of phase in bytes
Section 2. CMS Lata Areas and Control Blocks
145
EATLSECT 146 BBOX
EATLSECT describes the fields in the user job limits
AEATLIMT field in NUCON points to BATLSECT.
a
BATCPUL
BATCPUC
8
BATPUNL
BATPUNC
Hexadecimal
Displacement
Field
Nalle
BATCPUL
DC
H'32767'
2
4
6
BATCPUC
BATPRTL
BATPRTC
BATPUNL
BATPUNC
DC
DC
DC
DC
DC
H'O'
H'32767'
H'O'
H'32767'
H'O'
fEOX contains the begin and
respectively. The IJBBOX field
to the BBOX block.
a
8
Hexadecimal
Displacement
0
4
8
C
The
BATPRTC
Virtual processor limit (in seconds) ; can be
reset
Current processor count; de not reset
Number printed lines limit; can be reset
Current line count; do not reset
Number punched cards limit; can be reset
Current card count; do not reset
end addresses of the virtual and real partitions,
in the SISCOM tlock in the DOSCCN CSECT of NUCON points
~---------------------------------------------------------,
REALORP
REALNDP
1
,
-------------------------------------------------------------1
VIRTENDF
VIRTORP
Field
Name
REALORP
REALNDP
VIRTORP
VIRTENDP
~gyat~§
ALTSDAR
MINREALP
MPGEPOOL
ORIGVIRT
FINVIRT
146
jobs.
Field Description, Contents, Meaning
a
A
CMS batch
--------------------------------------
------------
8
BA'IPRTL
table for
Field Description, Contents, Meaning
DS
DS
DS
DS
XL4
XL4
XL4
XL4
f£I
!!~1g§
EQU
EQU
EQU
EQU
EQU
Origin
End of
Origin
End cf
!Q
~~Q!
REALORP
REALNDP
REALNDP+2
VIRTORP
VIRTENDP
of real partition
real partition +1
of virtual partition
virtual partition +1
Address of alternate area
No. Fage frames in minimum real partition
No. Fage frames in main page Fool
Origin of virtual storage
End cf virtual storage +1
IEM VM/370 Data Areas and Control Block Lcgic
BGCOM
BGCOM simulates the DOS/VS Partition Communicaticn Region (BGCOM)..
NUCON points to the BGCOM block.
0
8
PPBEG
EOSSP
I UPSI
18
COMNAME
20
PPEND
28
HIPROG
30
EOCADR
A*5
HIPHAS
LAELEN
A*1
A*6
A*7
48
FICLPT
NICLPT
LUEFT
58
LIOCSCOM
60
DIBPT
68
OCPT
PIBPT
1//////////////1
PWTIMS
JCBZCN
PCP'IR
ITPTR
1////////////1
SYSPAR
78
TODCOM
PIE2PTR
80
IJLQTTAD
BGCCMPT
88
COMEX
PDTAEB
A*10
A*11
A*12 I A*131 A*14
POVNAM
Field
Name
UPSI
COIBUME
PPEND
LTK
JAPART
PROCNAM (cont. from 8F)
C
17
18
20
CHKF'IID
70
JOB DATE
PPBEG
EOSSP
A*9
YYDtD
98
o
TEBPT
JIEFT
MMDD
I A*4
FCCLPT
FAVPT
50
A*3
DALC
PUBPT
90
8
A
A*8
PIK
A*2
40
Hexadecimal
Displacement
AEGCOM field in
JOBDATE
10
38
The
A*15
A*16
Field Description, Contents, Meaning
DC
DC
DC
DC
DC
DC
DC
C'OO/OO/OO'
S (0)
S (0)
11X'00'
X'OO'
CL8'CMS/DOS'
A (0)
Job date
Supervisor end
End ef storage protection
User scratch area
UPSI 1:yte
Job name
Highest storage address of partition
Section 2. CMS rata Areas and Contrel Blocks
147
EGCOM
Hexadecimal
tisplacement
24
28
2C
2E
30
34
35
36
37
38
39
3A
3B
3C
3E
40
42
44
46
48
4A
4C
4E
4F
4F
53
58
5A
5C
5E
60
62
64
66
68
6A
6C
6E
70
74
78
7C
7E
80
84
86
87
88
8C
8D
8E
8F
97
98
9P
148
Field
Name
HIP HAS
DC
HIPROG
DC
LABLEN
DC
PIK
DC
EOCADR
DC
CON PIG
DC
LTACT
DC
SOB1
DC
SOB2
DC
JCSW1
DC
JCSW2
DC
JCSW3
DC
JCSW4
DC
DALC
DC
FOCLPT
DC
PUBPT
DC
PAiPT
DC
JIBPT
DC
TEBPT
DC
PICLPT
DC
NICLPT
DC
LUBPT
DC
SYSLINE DC
SYSDATE DS
MMDD
DC
YYDDD
DC
LIOCSCOM DC
PIBPT
DC
CHKPTID DC
JQBZONDC
DIBPT
DC
DC
PCPTR
DC
ITPTR
DC
DC
OCPT
DC
PWTIMS
DC
LTK
DC
SYSPAR
DC
JAPART
DC
TODCOM
DC
PIB2PTR DC
PDTABB
DC
IJLQTTAD DC
BGCOMPT DC
OPTNBYTE DC
RMSROPEN DC
COMEX
DC
STDOPT
DC
TEMOPT
DC
DISKCONF DC
PROCNAM r:C
r:C
PSWTCH
DC
POiNAM
DC
INSIZE
Field Description, Contents, Meaning
A (0)
A (0)
H'O'
1'0010'
A (0)
B'11101000'
B'00010000'
B'11000100'
B'11011010'
B'11010000'
B'OOOOOOOO'
B'11000100'
B'10000000'
H'O'
A*1
A*2
A*3
A*4
A*5
A*6
1*7
1*8
S (0)
S (0)
S (0)
S (0)
S (0)
S (0)
S (0)
S (0)
AL1(56)
OCL9
XL4'00'
XL5'OO'
2X'00'
A*9
S (0)
H'O'
S (0)
S (0)
H'O'
S (0)
S (0)
S (0)
X'OOOC'
H'O'
S (0)
P'O'
P'O'
A (0)
S (0)
S (0)
A (0)
S (0)
X'OO'
A*10
B'00000000'A*11
A (0)
B'01000000'1*12
B'01000000'1*13
X'OO'
1*14
CL8' ,
X'O'
A*15
CL 7' ,
X'O'
A*16
End address of last phase loaded
End address of longest phase leaded
Length of problem program label area
Program interrupt key
End of virtual storage address
Machine configuraticn byte
System configuration byte
Standard language translator options
Standard supervisor options
Job control byte
Linkage control byte
Nonstandard language translator options
Job duration indicator byte
Disk address of volume latel
Address of POCL
Address of PUB
Address of PAVP
Address of JIB
Address of TEB
Address of FICL
Address of NICL
Address of LUB
SYSLST line count
System date
MfttI or DD~ft
YYIID portion of date
LICCS communication bytes
Address of PIB
Last checkpoint number
Jol:z.one in minutes
Eackground DIB pointer
Reserved fer lEft use
PC option table
IT option table
OC option table
Key of program with IT support
Reserved for lEft use
Logical transient key
Address of SYSFARft
Address of job accounting table
Address of TOD co.munications area
Address of PIB extension
Address of ftICR DTP table
Address of QTA~ vector table
Address of background COMREG
Option indicator ryte
System configuration byte 2
Pointer to SYSCOM option table
Standard jeb control optien byte
Temporary job control optien byte
Disk configuration tyte
Procedure name
Interface tyte for catalog procedure
Save area for statement name
81-tyte SYSIN indicator
IEM VM/310 Data Areas and Control Block Logic
CMSTAXE
CMSTAXE defines the fields used in a Terminal Attention Exit Element (TAXE). The TAXE is
used mainly by DMSCIT for processing attention interrupts. CMSTAXE is invoked via the
TSOBLKS macro. The TAXEADDR field in NUCON points to C~STAXE.
o
r--------------------------------------------------------,
TAXEEXIT
TAXESPSi
8
TAXELNK
TAXEIOL
10
TAXETSOF
TAXERTNA
18
TAXEEXTS
(Variable Length)
TAXEIOiS
60
(Variable Length)
1-----------------------------------------------------TAXETAIE
88 I
1-------------------------------------
90 1///////////////////////////1
98
AO
TAXEUSER
1-----------------------------------------------------------------TAIEIAD
1//TAIEMSGL//I/A*1/1////////1
1-------------------------------------------------------------------I
TAIERSAV
(Variable Length)
Bexadeci.al
tisplacement
o
Field
Name
Field Description, Contents, Meaning
1F
TAXESPSW DS
TAXEEXIT DS
TAXESTAT DS
A
OX
Left half PSi for ATTN return
ATTN exit address
Status of exit return
TAXEFREQ EQU
X'80'
ATTN exit taken
A
60
TAXELNK DS
TAXEIOL DS
TAXE TSOF DS
TAXERTNA DS
TAXEEXTS DS
TAXEIOiS DS
Next TAXE on queue
Left half of I/O old PSi
TSO flags saved here
Return address
ATTN exit routine save area
DMSICW save area
8C
90
94
94
AI§g !!!~1!!!g1!
TAXETAIE DS
DS
TAXEDEF DS
TAXEUSER DS
4
8
8
C
10
14
18
1F
1F
A
18F
11F
Ex!!
A
1F
OX
A
ggf:~!~!~f:
List
Address of TAlE
Reserved for IBM use
Defer indicator
User PLIST address
Attention 11l!~f:£]E! ~1~~~1!! (I!11)
Reserved for IBM use
TAIEMSGL DS----2XTAIETGET DS
11
A*1 Reserved for IBM use
DS
1X
Reserved for IBM use
Right half of I/O old PSi
TAIEIAD DS
A
16F
Registers 0-15 of interrupted program
TAIERSAV DS
I~f:millg1
98
9A
9B
9C
AO
Section 2. CMS rata Areas and Centrol Blecks
149
CVTSECT
CVTSECT simulates the as co •• unication Vector Table.
macro. The ACMSCVT field in NUCON points to CMSCVT.
o
CVTSECT is invoked
I
CVTMDL
1////////////1
8
Not supported
CVTDATE
40
Not supported
58
CVTEXIT
CVTBRET
Not supported
78
A*1
80
CVTR13
88
CVTNUCB
Not supported
AO
CVTMZOO
Not supported
B8
CVTOPTA
Not supported
CVTUSEB
Not supported
108
150
CVTAVIB
IBM VM/370 Data Areas and Centrol Block Logic
via the CMSCVT
CVTSECT
Hexadecimal
Displacement
o
Field
Name
2
CVTftDL
4
8
8
C5SCiT
40
44
50
54
58
5A
5C
7C
7D
80
84
88
8C
AC
BO
BC
BE
CO
C8
D4
D8
108
CVTDATE
CVTEXIT
CVTBRET
CVTDCB
CVTRi3
CVTNUCB
CVTl!ZOO
CVTOPTA
CVTUSER
CVTAVIB
Field Descripticn, Contents, Meaning
DC
DC
DC
DS
DC
DC
DC
DC
DC
DC
DC
BC
DC
DC
DC
DC
DC
tC
tC
DC
tC
DC
DC
tC
DC
DC
DC
B'O'
H'O'
CL4'Cx.x'
OD
14F'-1'
PL4'0'
3F' -1'
A (0)
F'-1'
XL2'OA03'
XL2'07FE'
8F' -1'
XL l' 40'
FL3 '-1'
P=O'
FI-1'
A (0)
8F' -1'
A (0)
3F' -1'
XL2'00'
XL2'00'
2F' -1'
3A (0)
F'O'
12F'-1'
V(DMSVIB)
A* 1
Reserved for IBft use
Processor identification and model number
CftS release number (latest release level)
CiT start
Not supported
Current date in packed decimal
Not supported
Not supported
Not supported
A SVC 3 instruction (exit)
A BCR 15,14 instruction
Not supported
System configuration = PCP
Not supported
R13 saved during OPEN
Not supported
Lowest storage address not in nucleus
Not supported
Highest storage address in machine
Not supported
Not supported
Bit 7: extended prec~s1cn flcating point
hardware in processor
Not supported
Not supported
Field available to user
Not supported
Address of VSAl! interface bcotstrap
Section 2. CMS rata Areas and Contrel Blocks
151
tEGSECT
tEGSECT contains the files used by DEBUG for saving registers, breakpcints, PSis, and
other data. V-constants in DMSDBD, DMSDBG, and tMSITE Foint to the DEEUG wcrk area.
o
r------------------------------------------------------,
CCWPRINT
SYMTAELE
8
108
SYMTBG
BRKPNTBL
188
TELEND
190
ARGS
1B8
, 1*1
JFLAGS
1CO
WIITRD
WTRDCNT
lC8
1DO
ORG
1D8
DEC
1EO
DECDEC
1E8
ARGSAV
RETSIV
1FO
EXIMLC
EXAMLG
1F8
BEGAT
STOPAT
200
SAVE1
SlVE2
208
DEGSAV1
248
DBGSIV2
_ _ _ _ .J
152
IBM VM/370 Data Areas and Ccntrol Block Logic
DBGSECT
288
290
TSY!
298
XPSW
2AO
LINE
A*2
.--
2A8
1
I
LINE1
300
308
A*3
LINEA1
,
1 A*4
320
1 A*5
PLIST for DftSCWR
328
330
1 A*6
338
INPUTSIZ
CONHCT
340
HEX
348
350
HEIHEX
358
BI1:S
360
r---
1 A*7
380
388
390
////////////////////////YPSW///////////////////////////
1-----------------------------I//////////TBLINDX//////////I////ECR/////I//////////////
1-------------------------------------------------I/A*8//I/A*9/I/A*10/I/A*11//I/////////tEGIWK////////////
I
1
398 ,IDBGXWK(Ccnt) 1//////////////1
1
tr
Section 2. CftS rata Areas and Ccntrcl Blocks
153
tEGSECT
Hexadecimal
tisplacement
0
8
108
10C
18C
Field
Name
Field Description, Contents, Meaning
ENTRY DBGSECT
CCWPRINT CCW
X'09',0,SILI,133
SYMTABLE
SYMTBG
BRKPNTBL
TBLEND
DS
DC
DC
DC
32D
F'O'
16F'0,-1'
A (TBLEND)
ARGS
Constants fg!
DS --oi)---DS
5D
MVCNT1
MVCNT
ARGMAX
EQU
EQU
EQU
*-ARGS
MVCNT1-8
1B8
JFLAGS
DS
6X
~~!LI! g~£ Co~!!ol
Arguaents stored here
Number of tytes in arguments
Needed for SET GPR command
End cf argument area
*
Flags corresponding to arguments. There is
one flag for each parameter, as follows:
00
FO
FF
1BE
154
(0 - 9)
Hexadecimal (A - F, 0 - 9)
Alphabetic (A - F)
DS
1X
MVCNT2
EQU
*-ARGS
For initializing to zero
OD
CL8'WAITRD'
!(INPUT)
C'U'
X'OO'
H'O'
Parameter list to get input line
A(input buffer)
Clean up and logical carriage return
F'O'
Origin of rcutine teing examined
WTRDCNT
DS
DC
DC
DC
DC
DC
1DO
ORG
DC
200
204
208
248
= Numeric
ARGSCT
1CO
1CO
1C8
1CC
1CD
1CE
1D8
1EO
1E8
1EC
1FO
1F4
1F8
1FC
DEBDU~P
User-defined symbol table
Symbcl tatle entries
Ereakpoint table
End address of breakpoint table
~!grag~ ~nd
190
190
Printer CCW for
WAITRD
I1!~ £:g11g!i~g !g!ig~!es
A*1
Number of arguments in command line
Byte count filled in here
.Q§~£ ~l DE~.!!g
1D
1D
1F
1F
1F
1F
1F
1F
g!!£ DEBD.QMP
Binary word
Decimal word
Storage for argument location
Storage for return address
First location to te examined
Length of field to be examined
Eeginning parameter teing Frocessed
Last Farameter location
LASTLINE EQU
DECDEC
32 bytes for last line dumped
SAVE1
SAVE2
DBGSAV1
DBGSAV2
1F
1F
16F
16F
DEEtOMP uses this area
DEC
DECDEC
ARGSAV
RETSAV
EXAMLC
EXAMLG
BEGAT
STOPAT
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
for line count
DEEUG EALR-call save
Save area fer CCNWAI~/CONREAD
IBM VM/370 Data Areas and Control Block Logic
DBGSECT
Hexadecimal
Lisplacement
Field
Name
Field Descripticn, Contents, Meaning
TSYM
XPSi
OUTPT1
LINE
LINE1
LINE1B
LINE1A
LINE1C
LINE1D
DS
DS
DC
DC
DC
DC
DC
DC
DC
CL 11' 1
87X'40'
C'*'
32X'40'
C'*'
X'40'
DBGOUT
INPUT
INPUT1
EQU
EQU
EQU
LINE
LINE
LINE+60
328
328
330
334
337
CONiR
DS
DC
DC
DC
DC
OD
PLIS~
CL8'TYPLIN'
AL1(1),AL3(DBGOUT)
CL1'B',AL2(0)
AL 1 (0)
A*6
338
33A
33C
340
348
34C
350
358
359
INPUTSIZ DS
DS
DC
CONHCT
DC
HEX
DS
DC
HEX HEX
DS
DC
BITS
DC
288
298
2AO
2A1
2AC
303
304
324
325
CONiRL
361
36F
379
CONHXT
37F
4F
1D
1C i
i
1*2
A*3
A*4
A*5
OutFut buffer
Input buffer
Hexadecimal pack area
for D~SCWR to type outrut line
PLIST continued
PLIST continued
PLIST continued
PLIST continued
1H
Size of typed-in input line
1H
Reserved for IBM use
F'O'
X'FAFBFCFDFEFFOOOO' Translate tatle
1F
Binary word
X'FFFFFFFF'
Fence
2F
Printer graFhic word
X'FF'
Extra translate byte
X'COCOCOCOCOCOCOCO'
Scratch word
ORG
DC
*+14
C'0123456789'
DC
C~ABCDEF'
EQU
CONHCT-C'A'
DBGSiTCH DC
Symbcl entry
Execution PSi
Byte count
I/O tuffer
Filler bytes
Filler bytes
Filler bytes
Filler bytes
Filler bytes
X'OO'
A*7
Translate table
Translate table
Translate table
Internal LEEUG status flags
in DBGSilTCH
--X'80'---DBDEXIT
DBDDMSG
DBGSET
DBGPERM
DBGCOND
380
388
38C
38E
390
391
392
393
394
39A
1.h~
EQU
EQU
EQU
EQU
EQU
12JJ2!iIDl
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
g~~
Reserved for IBM use
Reserved for IBM use
Exit from DEBDUMP
Duplicate message in DEBDUfE
SET command
Reserved for IBM use
Reserved for IBM use
~~§~~~~g !2~ 1]~ ]se
YPSi
TBLINDX
BCR
DS
DS
NOPR
NOPR
D
F
ILC
ILC11
ILC0110
ILCOO
DS
DC
DC
1C
X'06'
X'04'
X'02'
BAL
BALR
EQU
EQU
X'45'
X'05'
EAL operation code
EALR operation code
DBGXiK
DS
3H
Re-create instruction at BRKPT address
LPSi
48
Give control to NSI
DC
o
o
PSi containing NSI
Current BRKET table index
NOPE to Fad DBGXiK when needed
Additional NOPR (if needed)
A*8 ILC ef instruction in DBGXiK
A*9 3 halfword instructions (6 bytes)
A*10 2 halfword instructions (4 bytes)
A*11 1 halfword instructicns (2 bytes)
Section 2. CMS Lata Areas and Contrel Blocks
155
tEVSECT
tEVSECT describes the device information required for input/output routines.
a DSECT corresponding to the data in a DEVTAE entry.
o
8
Hexadecimal
Displacement
-----------0
2
3
4
8
C
156
DEVSECT is
~-------------------------------------------------------,
DEVADDR
1 D* 1
DEVNAHE
1 D*2
I
--------------------------------------------------------1
DEVIPRA
1
~EVHISC
Field
Name
Field Description, Contents, eeaning
DEVADDR
DEVFLAG
DEVTYPE
DEVNAHE
DEVIPRA
DEVMISC
DS
DS
DS
DS
DS
DS
1H
1X
1X
1F
1F
1F
DEVSIZE
EQU
*-DEVSECT
D*1
D*2
Virtual device address
Device flags
Device type
Symtolic device name
Interrupt processing routine address
Miscellaneous -- device dependent
Device table size (in bytes)
IEM VM/370 Data Areas and Control Block Logic
DEVTAE
DEVTAB contains the entries for the various devices handled by C~S (disks, tapes, reader,
punch, printer, and censole). DEVTAB is pointed to ty v-constants in tMSICW and DMSITI,
and is also referenced indirectly by the ADEVTAE field in NUCON.
-,
I
I
I
I
I
I
I
I
CONSOLE
a
,
BO
READEB1
co
PUNCH1
DO
PRINTEB1
10
ADISK
20
BDISK
30
CDISK
yon
l:;V
READEB2
40
DDISK
FO
PUNCH2
50
EDISK
100
PRINTER2
60
FDISK
110
TAPE1
70
GDISK
12C
TAPE2
80
SDISK
13C
TAPE3
90
YDISK
14C
TAPE4
AO
ZDISK
150
DU~~Y
I
----'
Hexadecimal
Displacement
-----------a
0
2
4
8
C
10
10
12
14
18
1C
20
20
22
24
28
2C
30
30
32
Field
Name
CONSOLE
ADISK
BDISK
CDISK
Field Description, Contents, Meaning
DS
DC
DC
DC
DC
DC
DS
DC
DC
DC
DC
DC
DS
DC
DC
DC
DC
DC
DS
DC
DC
OD
XL2'009'
XL2'0'
CL4'CON1'
VL4 (CONSI)
XL4'0'
aD
XL2'191'
XL2'O'
CL4'DSK1'
AL4 (0)
XL4'O'
aD
XL2'000'
XL2'O'
CL4'DSK2'
AL4 (0)
XL4'0'
aD
XL2'OOO'
XL2'O'
Device tatle entry for console
Device tatle entry for A-disk
Device tatle entry for B-disk
Device tatle entry for C-disk
Sectien L.
C~S
Data Areas and Centrol Blocks
157
BEVTAE
Hexadecimal
Displacement
-----------34
38
3C
40
40
42
44
48
4C
50
50
52
54
58
5C
60
60
62
64
68
6C
70
70
72
74
78
7C
80
80
82
84
88
8C
90
90
92
94
98
9C
AO
AO
A2
A4
A8
AC
BO
BO
B2
B4
E8
BC
CO
CO
C2
C4
C8
CC
DO
DO
D2
D4
D8
DC
158
Field
Name
DC
DC
DC
DS
DDISK
DC
BC
DC
DC
DC
EDISK
DS
DC
DC
DC
DC
DC
DS
FDISK
DC
DC
DC
DC
DC
GDISK
DS
DC
DC
DC
DC
DC
DS
SDISK
DC
DC
DC
DC
DC
YDISK
DS
DC
DC
DC
DC
DC
DS
ZDISK
DC
BC
DC
DC
DC
READER1 DS
DC
DC
DC
DC
DC
DS
PUNCH1
DC
DC
DC
DC
DC
PRINTER1 DS
DC
DC
DC
DC
DC
Field Description, Contents, Meaning
CL4'DSK3'
AL4 (0)
XL4'0'
OD
XL2'192'
XL2'0'
CL4'DSK4'
AL4 (0)
XL4'0'
OD
XL2'000'
XL2'0'
CL4'DSK5'
AL4 (0)
XL4'0'
OD
XL2'000'
XL2'0'
CL4'DSK6'
AL4 (0)
XL4'0'
OD
XL2'000'
XL2'0'
CL4'DSK7'
AL4 (0)
XL4'0'
OD
XL2'190'
XL2'0'
CL4'DSK8'
AL4 (0)
XL4'0'
OD
XL2'19E'
XL2'0'
CL4'DSK9'
AL4 (0)
XL4'0'
OD
XL2'000'
XL2'0'
CL4'DSKO'
AL4 (0)
XL4'0'
OD
XL2'00C'
XL2'0'
CL4'RDR1'
AL4 CO)
XL4'0'
OD
XL2'00D'
XL2'0'
CL4'PCH1'
AL4 (0)
XL4"'0'
OD
XL2'00E'
XL2'0'
CL4'PRN1'
AL4 (0)
XL4'0'
-------------------------------------Device ta1:le entry for D-disk
Device ta1:le entry for E-disk
Device ta1:le entry for F-disk
Device ta1:le entry for G-disk
Device ta1:le entry for S-disk
Bevice table entry for Y-disk
Device ta1:le entry for Z-disk
Device ta1:le entry for REAtEB1
Device table entry for PUNCH1
Device ta1:le entry for PRINTER1
IBM VM/370 Data Areas and Control Block Logic
DEVTAS
Eexadecimal
Displacement
------------
Field
Name
Field Description, contents, Meaning
1",,)
DC
104
108
10C
110
110
112
114
118
11C
120
120
122
124
128
12C
130
130
132
134
138
13C
140
140
142
144
148
14C
150
150
152
154
158
15C
160
DC
DC
DC
DS
DC
DC
DC
DC
DC
DS
DC
DC
DC
DC
DC
DS
DC
DC
OD
IL2'012'
IL2'O'
CL4'RDR2 i
AL4 (0)
IL4'O'
OD
IL2'013'
IL2'0'
CL4'PCH2'
AL4 (0)
IL4'0'
OD
IL2'010'
IL2'0'
CL4'PRN2'
AL4 (0)
IL4'0'
OD
IL2'181'
IL2'0'
CL4'TAP1'
AL4 (0)
XL4'0'
OD
XL2'182'
IL2'O'
CL4'TAP2'
AL4 (0)
XL4'0'
OD
XL2'183'
XL2'0'
EO
EO
E2
E4
E8
EC
FO
FO
F2
F4
F8
FC
100
100
READER2
DS
DC
DC
DC
DC
DC
PUNCH2
DS
DC
DC
DC
DC
DC
PRINTER2 DS
DC
IV~
TAPE1
TAPE2
TAPE3
TAPE4
DUMMY
TABEND
DC
CL4'TAP3'
DC
DC
DS
DC
DC
AL4 (0)
XL4'0'
OD
XL2'184'
XL2'0'
DC
CL4!TAP4'
DC
DC
DS
DC
DC
DC
DC
DC
DS
AL4 (0)
IL4'O'
OD
IL2'OOO'
IL2'0'
CL4'XXXX'
AL4 (0)
XL4'O'
OD
-------------------------------------Device table entry for REA1ER2
Device table entry for PUNCH2
Device table entry for PRINTER2
Device table entry for TAPE1
Device table entry for TAPE2
Device table entry for TAPE3
Device table entry for TAPE4
Device table entry for DUMMY
Section 2. CMS rata Areas and central Blecks
159
tIOSECT
DIOSECT describes the fields used by DftSDIO as a work area when reading and writing
actual blocks of data on CftS disks. DIOSECT is Iointed to ty a v-constant in DftSNUC, and
referenced indirectly by IDIOSECT in HUCOH.
0
IOOLD
8
DIOCSi
10
PWIIT
18
QQDSK1
20
28
CCWl
30
CCW11
38
CCW2
40
CCW3
48
RWCCi
50
58
60
SECTNUft
SEEKADR
LASTHED
L1STCYL
t
1*1
SENSB
A*2
18
80
SEHCCW
88
DOUBLE
90
IRSIVE
ERRCODE
C8
DO
FREERO
D8
SAVEIDT
CCWI
EO
E8
160
DICFREE
A*3
I 1*4
I 1*5
IBM VM/310 Data Areas and Centrol Block Logic
_ _ _ _ _- - 1
DIOSECT
Hexadecimal
Displacement
-----------0
0
8
10
10
18
1C
20
24
Field
Name
Field Description, Contents, Meaning
DIOSECT
IOOLD
DIOCSi
DSECT
DC
1D'0'
DC
1D'0'
I/O cld PSW (from interrupt routine)
CSW (from interrupt routine)
gbIsT IQ ~~ll DMSIOW
OP--DS
PiAIT
DC
CL8'WAIT'
DC
C'DSK-'
DC
F'O'
DC
F'O'
QQDSK1
DC
F'O'
QQDSK2
EQO
Filled in to correct symbolic disk number
First two bytes are always 0
QQDSK1+2
Halfword copy of 16th track disk address
cell Chain
28
CCii----- CCii
X!07!,SEEKADR,X'40',6
Seek
30
38
40
48
CCi1A
CCW2
CCli3
RiCCW
CCW
CCW
CCW
CCli
X'03',O,X'40',1
X'31',SEEKADR+2,X'40',5
X'08',*-8,0,1
X'00',*-*,X'20',*-*
Seek or set sectcr
Search
TIC back to search
Read or write data
50
SEEKADR
DC
XL7'00'
Seek/search information (first 3 bytes are 0)
57
SECTNOM
DC
X'OO'
Sector number
58
5C
ILQ In!Q!:!~tiQn
LASTCYL DC
F'O'
LASTHED DC
F'O'
60
DEVTYP
DC
X'OO'
A*1
01=2311, 08=2314, 09=3330
61
DIOFLAG
DC
X'OO'
A*2
RDTK/WRTK flag:
Becomes last cylinder number used
Becomes last head number used
~11§ g~!!~~Q
62
7C
80
TOO BIG
liRTKF
QQTRK
in DIOFLAG
EQO --X'04'--EQU
X'02'
EQO
X'01'
Byte count is greater than 800
Writing first chain link
Handling first chain link
DIAGNUM
EQU
24
Number assigned by CP for tIAGNOSE I/O
SENSB
DC
DS
CCli
Sense information
XL24'00'
OF
X'04',SENSB,X'20',24 REAt 24 BYTES SILl
SENCCli
(Scratch area, for CVD use, etc.)
88
!~~E !h~ ~QIIQ!!n9 Th!:~g
90
CC
CF
DO
D4
D8
EO
E8
E9
EA
XRSAVE
ERRCODE
!~E !h~
!QllQ!!1!9
DC
DC
F'O'
F'O'
SAVEADT
CCliX
DIAGRET
IOCOMM
LASTREC
DC
CCW
DC
DC
DC
F'O'
Handy place for an ADT address
X'23',SECTNUM,X'40',1
Set sector
X'OO'
A*3 CP's tIAGNOSE return code if nonzero
X' 00'
A*4 Set to read (06) or write (05)
X'OO'
A*5 Number (1-14) of the last reccrd processed
FREERO
DIOFREE
15F
AL3(0)
AL1(*-*)
!1! Order
--Registers 0-14 saved here for RDTK/WRTK
First 3 bytes of R15 error code
Error code (in R15 at exit)
DS
DC
DC
I!Q in Order
----wo. cf doublewords of free storage (if any)
Address of free storage for buffer or CCis
Section 2. CMS tata Areas and Contrel Blocks
161
DMSCCB
DMSCCE describes all fields of a DOS Co.mand Control Block (CCB). This DSECT is used by
DMSXCP to map the CCB specified by a user for an SVC 0 (EXCP)
and passes the address of
CCB to DMSXCP.
o
I
I
~CBCNT
A*1
1*2
A*3
1*4 I
A*5
A*6
1---------------------------------------------------------
8 I
1*7
CCBCCW
A*8
CCECSW
I--------------------~-------------------------------10 I
CCBLDITB
CCBLCCWE
1-------------------------------------------------------A*9
CCEFSCCW
1----------------------------------------------------I
CCBRDCCW
CCBWTCCi
1------------------------------------------------I
CCBLWCCW
1///////////////////////////
1------,--------------------------------------------------1///////////////////////////1///////////////////////////
18 1///////////////////////////1
20
28
30
1--------------------------------CCBNCCB
1///////////////////////////
38 I
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
CCBST
CCBD
EQU
EQU
*
*
Start CCB
Command control block
o
o
CCBL-Elf
CCBCNT
DS
OCL16
XL2
lIapcftherOS CCB
Residual count
2
2
CCBERMIP DS
CCBCOM1 DS
DS
OXL4
XL1
1*1
Four bytes used to check errors
Communications byte 1
Bits defined in CCBCOM1
CCBWAIT--EQU --X'80'--
3
CCBEOF
CCBIOERR
CCBERROK
CCBRDC
CCBPDE
CCBDCV
CCBUERR
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X' 01'
CCBCOM2
DS
XL1
!!i!§
g~r~!l!~g
CCBDCCNT
CCBTRKOV
CCBEOC
CCBDC
CCBNOREC
CCBRETRY
CCBVER
CCBCC
162
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
Traffic bit (set at CE)
End cf file
Unrecoverable I/O error
AcceIt unrecoverable error
Return data checks
Post at device end
Return data check RD/CHK
User error routine
1*2
Communications byte 2
in CCBCOM2
-X'80'-X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X' 0 l'
Data check in count area
Track overrun
End cf cylinder
Data check
No record found
Retry no record found
Verify error
Command chain (retry)
IBM VM/370 Data Areas and Control Block Logic
DMSCCB
Hexadecimal
Displacement
4
Field
Name
CCBCSW1
!!i!.§
5
Field Description, Contents,
DS
g~!i!!~g
CCBATTN
CCBSTMOD
CCBCUE
CCBBUSY
CCBCE
CCBDE
CCBUC
CCBUE
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
CCBCSW2
DS
XL1
A*3
6
7
8
9
C
D
10
14
18
1C
Attention
Status modifier
Control unit end
Busy
Channel end
Device end
Unit check
Unit exception
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
XL1
A*4
--x=ao:--
CCBPCI
EQU
CCBILEN
CCBPROGM
CCBPROT
CCBCHAND
CCBCHANC
CCBICTRL
CCBCHAIN
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
CCBSYMU
CCBSUCLS
CCBSUNUM
CCBLIOBS
CCBCCW
CCBCOM3
DS
DS
DS
DS
DS
DS
OXL2
XL1
XL1
XL1
XL3
XL1
CSW status tit 2
program-controlled interruFt
Incorrect length
Program check
Protection check
Channel data check
Channel central check
Interface control check
Chaining check
A*5
A*6
1*7
A*8
Symbclic unit (SYSUN)
U - LUB class
N - LUB numter within class
Reserved for tleES
Pointer to start of channel Frogram
Communication byte 3
CCBAPEND EQU
X'40'
APFendage exit at interrupt
CCBCSW
DS
CCBLDATB DS
CCBLCCWB DS
DS
CCBUFLGS DS
XL3
Pointer to csw or to appendage routine
Address of last data block
Address of last CCi tlock
Reserved for IBM use
I/O manager CCB flags
!!i!.§
1D
20
24
28
2C
status tit 1
in CCECSW1
--X'8'O'--
Bits
defined in CCBCSW2
- - ------
6
csw
~eaning
A
A
F
X
£~!i~£ in CCEUFLGS
A*9
CCBUEAIC
CCBUEAC
CCBURDCW
CCBRPS
EQU --X'SCj"i--EQU
X'40'
EQU
X'20'
EQU
X'10'
Error analysis in control
Errer analysis complete
Read CCW active
RPS channel program candidate
CCBFSCCW
CCBRDCCW
CCBWTCCW
CCBLWCCW
DS
DS
DS
DS
DS
Save area fer first CCi address
Address of first read CCW
Address of first write ccw
Address of the last write CCW
Reserved for IBM use
XL3
F
F
F
3F
Note: CCBLWCCW chain field must have the same displacement as does FCECHIIN
In-FCDB and also BKPFSTBK in BKPRD
38
3C
CCBNCCB
DS
DS
A
F
Address of next CCB block
Reserved for IBM use
Section 2. CMS tata Areas and Centrol Blocks
163
tOSSECT
CMS/DOS envircnment.
tOSSECT simulates the CMS File Control Elock (FCE) in the
is invoked by the DOSCB macro~
The DOS Simulation Control Blocks are chained together. The DOSFIBST field
points to the first DOSCB in the chain, or if no chain exists, contains zerc.
o
DOSNEXT
tOSCBID
8
DOSDD
10
DOSOP
18
DOSDSNIM
20
DOSDSTYP
28
DOSDSMD
DOSITEM
30
DOSBYTE
38
DOSREID
40
48
DOSBUFF
DOSIORM
1*1
DOSCOUT
I 1*2
DOSBLKSZ
DOSWORK
1*3
1*4
1 1*5
50
DOSOSDSN
58
DOSEXTTB
60
DOSBUFSP
68
DOSUCNAM (cont. )
DoseSFs-r·
1*6
DOSVOLTE
DOS5EBSE
t 1*1
t 1*8
DOSUCIAft
DOSSIVE
80
164
r-------------------------I
1*9 I A*10 11/11111//////1
IBM VM/310 Data Areas and Centrol Block Logic
,
DOSSECT
in NUCCI
DOSSECT
Hexadecimal
Displacement
o
Field
Name
DOSINIT
1lJ:!§
o
4
8
10
18
18
20
28
21
2C
30
34
36
38
3C
3D
3E
lIn
"tv
48
48
49
4A
4B
Field Description, Contents, Meaning
DS
ox
DOSCE flag l:yte
g~!J:1!~g in DOSINIT
--x''4o'---
DOSOS
DOSDOS
DOSCMS
DOSDDCAT
DOSPERM
DOSJCAT
DOSUCAT
EQU
EQU
EQU
EQU
EQU
EQU
EQU
DOSNEXT
DOSCBID
DOSDD
DOSOP
DOSTAPID
DOSDSNAM
DOSDSTYP
DOSDSMD
DOSITEM
DOSBUFF
DOSBYTE
DOSFORM
DOSCOUT
DOSREAD
DOSDEV
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1lJ:!§
DOSDUM
DOSDSK
in DOSDEV
EQU --0-----EQU
20
DOSTAPMD
DOSBLKSZ
DOSWORK
DOSYSXXX
DOSSYS
DOSXXX
DOSEXT
DOSEXTCT
DS
DS
DS
DS
DS
DS
DS
DS
OS user-created bit
Defined for non-CMS disk
Defined fer eMS disk
User catalog data set
Permanent control l:lock
Search VSAM job catalog
Search VSAM user catalog
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
A
CL4
CL8
eL8
OX
CL8
CL8
CL2
B
F
F
CL2
B
F
X
A*1
AL3 (next rOSCB)
DLBL to distinguish from CMSCE
Data definition name
eMS operation
Tape identification
Data set name
Data set type
Data set mode
Item (record) number
A (input/output l:uffer)
Size of buffer (data count)
File format: fixed/varial:le
Records per CMS physical block
Numl:er of bytes actually read
Device type code
g~!J:1!~g
II,..
"t ...
DOSOSFST DS
50
54
58
5C
5E
5F
60
64
6C
84
85
86
88
DOSOSDSN
DOSVOLTB
DOSEXTTB
DOSSENSE
DOSVOLNO
DOSEXTNO
DOSBUFSP
DOSUCNAM
DOSSAVE
DOSEXTCX
DOSTYPE
DOSEND
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DOSENSIZ EQU
Dummy device
Disk
OD
Tape mode set to save
Elock size
Work area
Logical unit for CMS/DOS
SYS/FROG unit: X'OO'=SYS, X'01'=PROG
Number frem 000-255 associated with the unit
Number of Des extents left to process
Current DOS extent
Pointer to CS PST
Pointer to es dsname block
A(volume ID table)--VSAM multivclume data set
A(extent tatle) for VSAM data sFace
I/O sense data
No. cf volumes (entries in DOSVOLTB)
No. of extents (entries in DOSEXTTB)
Size of VSAM I/C buffer(s)
VSAM user catalog ddname
Tempcrary save area for re-entrant code
Current extent (used by DMSXCF)
Data set type (SAM=S, VSAM=A)
Reserved for IBM use
End address of this tlock
(*-DOSSECT)/8
Size of block in doutlewords
X
A*2
B
D
OB
1X
1X
1X
1X
A*3
A*4
A*5
A*6
F
F
F
B
X
X
F
CL8
6F
1X
1C
A*7
A*8
A*9
A*10
B
Section 2. CMS rata Areas and Control Blecks
165
EDCB
ErCB is used by all CMS EDIT modules to define common free storage control blocks. It is
initialized by DMSEDX r the EDIT bootstrap routine, and built dynamically from user free
storage each ti.e a user issues the EDIT command.
o
FNAME
8
FTYPE
10
FMODE
18
ZONE2
20
A*1
A*2
VERCOL1
TRUNCOL
ZONE1
VERCOL2
VERLEN
CARDINCR
SCRBUFAD
LMSTART
28
LMINCR
A*3
TABS
48
SEQNAME
50
PADBUF (cont.)
58
A*5
PADBUF
PTR1
60
•
681
I
701
PTR2
PTR3
AEXTEND
CORITEfiI
SPARES
FP'IR
ITEM
AFSTFNRD
FREELER
FREEAD
EDRET
EDMSK
I
781
I
801
I
881
I
901
MAINAD
I
I
I
C81
AUTOREG
CARDNO
I
LMCURR
DOl
I
D81
I
I
I
I
I
I
I
EO,
,,
COUNT
BUFFL
EUFFA
CANSAV
,
1001
166
IBM VM/370 Data Areas and Control Block Logic
IiUALNOS
EDCB
DUALNOS (cant.)
DECIMAL
1F8
HALF
200
REGSAVE
210
I
218
REGSAVX
r-----------.--------------
REPeNT
220
SAVEAR
260
CHNGNUM
XYCNT
TIN
268
270
AEDLIN
278
A*6
TOUT
280
A*7
288
IOLIST
290
rOID
298
2AO
IOAl:
IOMODE
BEes
')'110
~ollU
2BO
AL'!LIS'!
2B8
ALTLIST (cant. )
2CO
EDWORK (cant. )
AL'!MODE
2C8
2DO
ALTMODE (cant. )
2FO
2F8
300
!DliORK
STACKAT
STACKAT (cant.)
STACKATL
AT'!N
Section 2. CMS l:ata Areas and Control Blocks
167
EtCB
I
3081
ATTN
(cant.)
310
ATTNLEN
318
RENLIS'!
RENLIST (cant.)
RPLIST
320
RPLIST
328
STRTNO
INeRNO
330
AINCORE
FSIZE
338
DECLTH
340
RANGE
348 /////////////////////////RESVD1/////////////////////////
350
A*8
BUFAD
WRCOUNT
A*10
358
BUFFLOC
ALINELCC
360
ANUMLOC
AFIAGLOC
368
TRNCNUM
At'IOCNT
IUTOCURR
370
CHNGCNT
DITCNT
EICT
LINELoe
378
NUMLOC
SIVCNT
TVERCOL1
TVERCCL2
A*11 I A*12
380
J
388
3AO
ABEA
AREA (cant.) I 1*13 I A*14
_ _ _ _-----.J
CHNGl!SG
CHGTRUNC
318
3BO
(unidentified)
3B8
CMODE
3CO
FILEMS
r
, A*15 , A*16
3D8
A*17
JAR
NEWNAl!E
428
NEWNAME (cant.)
430
NEWTYPE (cant.)
438
168
SERSAV (cant.)
IBM VM/370 Data Areas and Central Block Logic
NEWTYPE
NEW MODE
A*18
A*19
ELeE
r--------------------------------------------·-----------,1
r
440lSERTSEQ (cont) 1 A*20 I A*211
I---------------------------~
4481
A*22
1
1 A*23
1-----------------------------------------------------SCLNO
4601 A*24 1 A*25
1----------------------------------XABEA
4681 SCLNO (cent.) 1 A*26 I A*27 1
I----------------------------------·----~
1
(Same length as EILIN)
YAREA
1------------------------------------------------------4F8
(Same length as EILIN)
580
A*28
588
XXXCWD
590
SAVCWD
598
INVLDBDR
SAO MACROBDR(cont) 1
INVLD
MACROBDR
MACRe
5A8
J
5BOI
EDLIN
1------------------------------------------------------LINENO
I A*29
6301
I----------------------------------------~
I
LINE
A*30
6D8
TABLIN
Section 2. CMS Lata Areas and Control Blocks
169
EtCB
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
DS
OF
BLOC
EQU
*
10
12
13
14
16
FNAME
FTYPE
FMODE
FV
CASESW
TRUNCOL
ZONEl
DS
DS
DS
DS
DS
DS
DS
CL8
CL8
CL2
CL1
CL1
18
1A
1C
1E
20
24
28
2A
ZONE2
VERCOL 1
VERCOL2
VERLEN
SCRBUFAD
CARDINCR
LMSTART
LMINCR
DS
DS
DS
DS
DS
DS
DS
DS
B
B
B
B
2C
2D
2E
FLAG
FLAG2
TABS
DS
DS
DS
CL1
CLl
26AL1
ENDTABS
EQU
*
SEQNAME
PADCBAR
DS
DS
CL3
CL1
END BLOC
EQU
*
o
8
48
4B
!21~:
4C
58
60
64
68
6C
70
74
78
7C
80
84
88
8C
90
94
170
B
B
F
F
B
B
A*3
A*4
End cf tabs
A*5
Name, if any. for serializaticn
'0' cn right, , , on left
End cf blocks
PADBUF must remain directly tehind FADCHAR
PADBUF
DS
9C
Pad characters
PTRCONS
EQU
*
DMSEDI line pointers
PTRl
PTR2
PTR3
AEXTEND
CORITEM
SPARES
FPTR
ITEM
AFSTFNRD
FREELEN
FREEAD
EDRET
EDMSK
MAINAD
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
2F
Pointer to top of file (for dummy top line)
Current line pointer
Pointer to tottom line
Pointer to end of used area of storage
Number of bytes for one liDe in storage
Number of spare lines
Free list pointer
Item length
Anchor for stacked lines upon entry
Length of free storage
Address of free storage
CMS return address
DMSSCR edit mask
LOADSYS address; 0 if LOADMCD
EPTRCONS EQU
C8
CC
DO
D8
DC
EO
104
1F8
1F8
A*1
A*2
Filename
Filetype
Filemode
Record format
Case setting
Truncation column
Eeginning zone initialized tc first
column
End zone
Verify column 1
Verify column 2
Verify length
Address of GET MAIN buffer
Increment for serialization
Where line numbers start
Automatic line numters using default
increment
Flags for line monitoring
Miscellaneous flags
Maximum of 25 tabs is allowed
AUTOREG
CARDNO
COUNT
LMCURR
BUFFL
BUFFA
CANSAV
DUALNOS
DECIMAL
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
F
F
F
F
F
F
F
F
F
F
F
F
F
*
DMSEtI save areas and buffer pointers
13F
Autocheck save area
Save area for sequence number
Numter of characters in EDLIN
Prompter current line number
Length of string (EDC)
Address of string (EDC)
Register save (EDC)
Tempcrary string buffer (EtC)
F
F
2F
F
F
9F
CL240
OD
F
Used by DECEIN and BINDEC
IBM VM/370 Data Areas and Control Block Logic
ELCB
Hexadecimal
Displacement
1FC
200
214
220
224
260
264
268
268
270
271
274
275
278
Field
Name
Field Description, Contents, Meaning
HALF
REGSAV
REGSAVX
REPeNT
SAVEAR
XYCNT
CHNGNUM
TIN
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
AEDLIN
DS
CASEREAD DS
DS
TOUT
DS
~/O
~r>
DS
ela
280
281
284
285
286
DS
DS
DS
DS
DS
X
H
BINt!C only edits four characters
Register save area
Register save area
FOB count
DMSSCR save area
X or Y execution count
Number of lines to change
WAITRI PLIS'I
WAITRt
'1' for console No.1
A(EILIN)
Iefault to uppercase
Length put here
TYPLIN PLIS'I
TYPLIN
'1' for console No.1
Address goes here
'B' for black ribbon
X'20' maximum length override
Length goes here
CRBIT
EQU
X'80'
Suppress carriage return
IOLIST
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
OF
CL8
CL8
CL8
CL2
DS
F
Initialization for state of source
STAT!
EDIT
CMSOT1
A1
Item number for RDBUF
Io not allow asterisks
133 (XINSCRIPT use LINE)
F/V and null record indicator
1 (XINSCRIPT one line at a time)
Number of bytes read from BDBUF
DS
DS
DS
DS
DS
OF
CL8
CL8
CL8
CL8
DS
CL8
DS
DS
DS
DS
STACKAT DS
DS
DS
STACKATL DS
ATTN
DS
DS
DS
ATTNLEN DS
RENLIST DS
DS
RPLIST
DS
STRTNO
DS
INC RNa
DS
AINCORE DS
FSIZE
DS
DS
DECLTH
RANGE
DS
RESVD1
DS
CMDBLOK DS
DS
BUFAD
FLG
DS
CL8
CL2
CL6
8X
OF
CL8
CL4
....
288
288
290
298
2AO
2A2
2A4
218
2AC
2AE
2BO
2B4
2B4
2BC
2C4
2CC
2D4
2DC
2E4
2E6
2EC
2F4
2F4
2FC
300
304
304
30C
310
314
314
31C
328
32C
330
334
338
340
348
350
351
354
TYPFLG
laID
IOMODE
lOAD
RECS
ALTLIST
EDWORK
ALTMODE
F
5F
3F
F
15F
F
F
OF
CL8
X
3X
C
A*6
3X
OF
3X
C
X
A*7
H
CL4
F
CL2
H
RENAME
EDIT
CMSOT1
A1
New filename
New filetype
'*'
New filemode
FF fence
PLIST to stack first in first out
ATTN
First in first out
Length and address of line to stack
F
OF
CL8
CL4
F
OF
CL8
CL12
F
F
F
F
D
D
D
X
A*8
3X
X
A*9
ATTN
Last in first out
Length and address of line to stack
RENOM PLIST
RENOM
Fileid
Starting number
Increment number
In-storage copy address
Record length
tMSSCR work area
Message data areas
Reserved for IBM use
X'19'
Buffer address
CCW flag
Section 2. CMS Iata Areas and Control Blocks
171
EDCB
Hexadecimal
Displacement
172
Field
Name
Field Description, Contents, !eaning
355
356
358
358
35C
360
364
368
36C
36E
370
372
CTL
WRCOUNT
GIOPLIST
BUFFLOC
ALINELOC
ANUMLOC
AFLAGLOC
TRNCNUM
AUTOCNT
AUTOCURR
CHNGCNT
DITCNT
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
X
H
OF
F
F
F
F
F
H
H
H
374
376
378
37A
EDCT
LINELOC
NUMLOC
SAVCNT
DS
DS
DS
DS
H
37C
37E
380
381
382
38A
38B
38C
3AO
3A2
3AF
3B8
3BC
3D6
3D7
3D8
3D9
425
42D
435
437
43F
442
443
444
45E
45F
460
461
462
46A
46B
46C
46E
4F6
4F8
57F
580
586
587
588
590
TVERCOL1
TVERCOL2
ALCHAR1
ALCHAR2
AREA
BYTE
CHNGFLAG
CHNGMSG
DS
DS
DS
DS
DS
DS
DS
DS
DS
CHGTRUNC DS
DS
CMODE
DS
FILEMS
DS
FLAGLOC DS
GETFLAG DS
HOLDFLAG DS
JAR
DS
NEWNAME DS
NEWTYPE DS
NEWMODE DS
SERSA V
DS
SERTSEQ DS
SERTSW
DS
SIGNAL
DS
TEMPTAB DS
UTILFLAG DS
XYFLAG
:os
SCRFLGS DS
SCRFLG2 DS
SCLNO
DS
TWITCH
DS
TYPSCR
DS
XAREA
DS
DS
YAREA
DS
DS
H
598
INVLDHDR DS
BLANK1
XXXCWD
SA VCWD
CNOP
DS
DS
DS
DS
H
H
H
H
A*10 Control byte
Write count
DMSSCR PLIST for D!SGIO
Buffer location
Address of line location
Address of number location
Address of flag location
Number of lines truncated
Autosave parameter
Current modification count
Temporary area for change
Count of lines stacked by the REUSE (=)
subroutine
Next char in EDLIN
Display line number
Display count
Length of last saved request not beginning
with either a 1 or
Temporary area for verifying column 1
Temporary area for verifying coluan 2
A*11 Temporary byte used by ALTER
A*12 Temporary byte used by ALTER
EDIT instruction work
A*13 Temporary byte (used by GET)
A*14 Flag for change
Lines changed aessage
H
C
C
CL8
X
X
CL20
2X
C', •
13X
C· ••• LINE (S) ,
9X
C'TRUNCATEt'
CL4
Fileaode for MODECHK routine
CL26
Retry message
X
1*15 Flag for DMSGIO
X
A*16 Flag for GETFILE
X
1*17 DMSSCR SCRFLGS
(ENDBLOC-BLOC)AL1 Save area for preserve
CL8
Naae area for FILE and SlVE commands
CL8
Type area for FILE and SlVE co.mands
CL2
Mode area for FILE and SlVE commands
CL8
A*18 Identification number for save area
CL3
A*19 Temporary byte identificaticn nu.ber area
X
A*20 Temporary byte used ty identification number
X
1*21 Signal between routines
(ENDTIBS-TIBS)lL1 Temporary spot for new tabs
X
A*22 DMSSCR utility flags
X
A*23 X/I active flag
X
A*24 Screen function flags
X
A*25 More screen function flags
8C
Save LINE!ODE sequence number
X
A*26 Location flags
X
A*27 Display unit size index value
H
X length and request buffer
CL135
(Same length as EDLIN)
H
I length and request buffer
CL135
(Same length as EDLIN)
6,8
X
X
CL8
CL8
CL6
Alignment for XXXCWD
Alignment for XXXCWD
A*28 Blank for clearing EDIT XXXCWD
EDIT token tuffer
Location at which contents of XXXCWD
are saved
1EDI~:
(for invalid requEst aessage)
IBM VM/370 Data Areas and Control Block Logic
EDCE
Eexadeciaal
Displacement
------------
Field
Nalle
Field Description, Contents, !!eaning
59E
512
lUCROHDR DS
DS
INYLD
514
IUCRO
518
CL4
OCL6'?EDIT:'
-------------------------------------EXEC for EDIT Ilacro stacking
Location to store invalid header
ORG
DS
INYLD+2
OCL4'EXEC'
Location to hold macro beader (if invalid)
ORG
DS
IUCRO+4
C
Blank used for clearing EDLIN
519
630
635
636
EDLIN
LINENO
BLANK2
LINE
DS
DS
DS
DS
CL135
CL5
X
CL160
6D6
6Di
BLAIK3
TABLli
DS
DS
I
778
EDCBEND
DS
OD
EDCBLTH
EQU
(EDCBEND-EDCB) Length of EtCB in doublevords
CL160
Terminal input 1:uffer
Line number for typeout
1*29 Blank for clearing line
Current line is held here
1*30 Blank for ""'_ .... a...... ; ..... ,. T1ELI)
Output froll spread
,,'.a~
~.u':::J
Section 2. CftS tata Areas and Control Blocks
173
ERDSECT
ERDSECT describes the fields in a work area used for giving responses and error .essages
via the DMSERR or LIDEDIT macros. A V-constant in DMSERR points to the DeSERT CSECT in
DMSDUC.
o
ERT1
8
ERT2
10
18
ERSAVE
58
ERPAS13
AO
A*1 I A*2
A8
ERPDUM
BO
ERPBFA
B8
ERSBD
CO
ERSSZ
D8
I A*6
A*4 I A*5
ERDCM
ERSECT
A*7
ERTEXT
160
174
ERPCS
lRPSEA
ERMESS
EO
168
A*3
(Double word preceding text)
C8
DO
ERPTXA
ERTPL
ERTPLA
ERTPLL
IBM VM/370 Data Areas and Control Block Logic
ERDSECT
Hexadecimal
Displacement
-----------0
8
18
58
AO
Field
Nalle
Field Description, Contents,
Work Area !2f
ERT1
DS
DS
ERT2
~ll~ !f~~
ERSAVE
ERPAS13
DS
DS
Reconstructed
ERPF1----nS--
!H1~~lU~
D
2D
Erf2f g~g!!~g R2Y!!~~
Doubleword workspace
Two doublewords workspace
16F
18F
Pass this save area in R13 to BALR-ed
to-routines
~LI~% !f~~
B
A*1
Bits defined in ERPF1
ERF1TX---EQU --x'fH)"iEQU
ERF1HD
X'40'
ERF1BF
EQU
X'20'
ERF1SB1 EQU
X'10'
ERF1SBN EQU
X'08'
A1
ERPF2
DS
A*2
Bits defined in ERPF2
ERF2CM---EQU --x'SO'
ERF2DT
EQU
X'40'
ERF2DI
EQU
X'20'
A4
A8
A8
AA
AB
BO
ERPTXA
ERPHDR
ERPNUft
ERPLET
RRPCS
ERPBFA
DS
DS
DS
DS
DS
DS
~!~g
!!elg
Error message
Type
S10
None
Print
CPCOMM
OCL6
H
A*3
CL3
A
B4
B8
ERSBP
DS
A
BC
ERSBF
DS
B
~it§ g~!!~~g
ERSFLST
ERSFA
ERSFL
EQU
EQU
EQU
in ERSBF
--X'SO'X'40'
X'20'
Second flag byte
Blank compression wanted
Dot at end of line wanted
HAL 'l=YES wanted
A
C
First flag tyte
Text address in PLIST
Header in PIIST
Buffer address in PLIST
One substitution
More than one sUbstitution
B
Last 3 Bits Indicate
ERF2ER --EQU---O---ERF2TY
EQU
1
EQU
2
ERF2S1
EQU
3
ERF2NO
ERF2PR
EQU
4
EQU
5
ERF2CP
~eaning
A*4
Text address
Error message header
Message numter
Message letter
CSEC'! name
Buffer address (for BUFFA)
Pointer to first (next) group of substitution
parameter in original PLIST
Data
address
and/or value
of
current
substitution parameter
Flag byte for current substitution parameter
The last sutstitution parameter
A-type option
Length specified
Section 2. CMS rata Areas and Control Blocks
175
ERDSECT
Hexadecimal
Displacement
Field
Name
Field Descripticn, Contents, Meaning
La§! ~ Bits Give Q£!!on
BRSFH --EQU---O
BRSFD
BQU
1
BRSFC
EQU
2
BRSFH4
BQU
3
BRSFCS
BQU
4
BD
BRSBL
DS
x
co
ERSSZ
DS
A
CS
DO
D3
D6
D9
DA
DB
176
HEX or HEXA
DEC or DECA
CHARA
HEX4A
CHAR8!
A*5
~9~§!!~ct!9~ !~
Byte length for the current sUbstitution
paraaeter
Size of sUbstitution field is number of
dots ainus 1
BRKBSS
BRSBCT
BRNUK
BRLBT
BRBL
DS
DC
DC
DC
DC
DC
D
C'DMS'
C'MMM'
C'NBN'
C'L'
C"
ERTSIZE
EQU
130
Maximua text size
BRTBXT
DS
(ERTSIZE+1)C
Message text area
~YPLI!Lg~I!I1H~
160
160
16S
16C
~lEg
ERTPL
BRTPLA
ERTPLL
DS
DC
DS
DS
A*6
A*7
Need doublevord before text
First letters of header
DSECi naae
Message num1:er
Message level letter
Blank
PLIST Construction
OP--------------
A!g~
CLS'TYPLIN
AL1(1),AL3(ERMESS) Message text address
C'R',AL3
Message length
IBM VM/370 Data Areas and Control Block Logic
EXTSECT
EXTSECT describes the fields in the External Interrupt work area referenced
EXTSECT is pointed to by the AEXTSECT field in NOCON.
o
EXSAVE
40
TYPLIST
48
TIftCCW
50
TIllCHAR
58
SCAW
60
0
40
48
4C
50
58
64
68
A8
IC
BO
B4
TIMINI'I-
68
EXSAVE1
A8
EITPSW
BO
SAVEXT
B8
EITRET
co
JRO
C8
STI!!EIIT
Hexadecimal
Displacement
by DMSITE.
JR1
1*1
Field
Naae
11/11/11111111111111.
Field Description, Contents, Meaning
~!~ra.9~ !~! ~!.!~ !!l!~!!J!E!
EXSAVE
DS
16F
TYPLIST
TIftCCi
DC
DC
DC
DC
DC
DC
CL8'TYPLIN'
A(TIMCHAR)
C'B',X'81',AL2(1)
X'FF',IL1'00' BLIP character(s)
XL12'00'
Saved CSW/CAW
A(2000000/13)
Value that sets tiaer equal to 2 seccnds
TIft CHAR
SCAi
TIMIHIT
~:t~g.9~ !~!
EISAVE1
EXTPSW
SAVEIT
DS
DC
DC
DC
DC
External
---16P--
Saved external old PSW and/or contents of
registers
PLIS1 to type BLIP character
(Q!h~! :th~!! l!!~!:>
X'80000000'
A(0)
F'O'
V (DMSDBG)
.1!!terr,YE!
Saved registers
Filled-in PSi
Transfer address for external interrupt
Address in IEBUG for external interrupt
Section 2. CMS Iata Areas and Ccntrcl Blocks
111
EXTSECT
Hexadecimal
Displacement
Field
Name
.§togg~
!£!
l~lP
C4
JR1
DC
STIMEXIT DC
EXTFLAG DC
A(0)
A(0)
X'OO'
REALTIMR EQU
X'80'
Real timer indicator
AL3 (0)
Reserved for IBM use
CD
DC
D
F'22'
YE Bl
EXTRET
JRO
CC
DS
DC
!!!~!!!g! !!!!~!!~E! ~~!
B8
CO
C8
178
Field Description, Contents, Meaning
1*1
Saved external old PSi
22 doublevords for floating-~oint
and user save area
Address of free storage
Address of STIMER exit routine
External flag
IBM VMj370 Data Areas and Control Block Logic
registers
EXTUAIHA
EXTUAREA is a 96-byte user area generated by the C!SAVE macro. The peinter to the user
area is passed to the user via register 13.
The USAVEFTR field in C~SAVE also Faints tc
the user area.
r
o I
40
FRS
60
UEXTPSWO
68
USERAREA
Hexadecimal
Displacement
-----------0
40
60
68
BO
GRS
Field
Name
GRS
FRS
UEXTPSWO
USERAREA
USEREAND
Field Description, Contents, I!eaning
DS
DS
DS
DS
DS
DS
OD
16F
4D
1D
18F
OF
-------------------------------------Registers at time of interruFt
Floating-point registers at interrupt
External old PSi at interrupt
User save area
End user area
Section 2. CMS rata Areas and Contrel Blocks
179
FCBSECT
FCBSECT consists of the CMS File Control Elock (FCE) (used for file management under
CMS), the simulated OS Job File Control Block (JFCB), Input/Output Block (lOB), and Data
Extent Block
(DEB). FCBSECT is invoked via the CMSCE macro. FCBSECT is dynamically
allocated from CMS free storage each time the FILEDEF command is issued.
o
FCBNEXT
FCEPROC
8
FCBDD
10
FCBOP
18
FCBDSNIM
20
FCBDSTYP
28
FCBDSMD
FCBITEM
30
FCBBYTE
38
FCBREID
FCEFORM
FCBCOUT
FCBXTENT
1*2
40
FCBRECL
48
FCBMEMBR (cont.)
I 1*3
FCEMEMBR
I 1*4
FCBOSFST
50
FCBOSDSN
PCER13
58
FCBKEYS .
FCBPDS
60
JFCBftlSK
68
JFCBCRDT
70
1*7
JFCBXPtT
JFCBUFL
I A*8
JFCLIMCT (cont.) I
78
80
JFCLRECL
JFCDSORG
I 1*5
1*6
A*9
1*10 1//////1 1*11
A*12
1*13
JFCBLKSI
I A*14 I A*15 1///////////////////////////
88
DEBTCBAD
SEBSIV
90
DEBOFLGS
DEBCPITB
98
IOBNXTID
IOBECB
AO
DEBDCBID
IOBECBPT
A8
IOBCSW
BO
•
FCEBUFF
IOBSTART
IOBtCBPT
Format of Location X'24' for Console Device
FCBIOOUT
20
r
28 I
FCBIOOUT (cont.)
FCBIOBUF
I----------------·------------------------------------~
30 I 1*16 I A*17 I
180
FCBIOCNT
IBM VM/370 Data Areas and Control Block Logic
FCBSECT
Hexadecimal
Displacement
o
Field
Name
FCBINIT
Field Description, Contents, Meaning
DS
~!!§ g~!!!!~g
ox
Initialization flag tytes
in FCBINIT
--X'20'---
FCBDOSL
FCBOS
FCBOPCB
FCBPERM
FCBBITCH
FCBCITML
EQU
EQU
EQU
EQU
EQU
EQU
FCBNEXT
FCBPROC
FCBDD
DS
DS
DS
CL8
iO
FCBOP
DS
Ct8
18
18
18
18
IHAJFCB
JFCBDSNM
FCBTIPID
FCBDSNAM
FCBDSTYP
DS
DS
DS
DS
DS
OD
OX
OX
CL8
CL8
AL3 (next CMSCB)
processing routine)
Data definition name
eMS operation
Job file control block
44 bytes, data set name
Tape identification
Data set name
Data set type
FCBPRPU
EQU
FCBDSTYP+4
printer/punch command list
24
2C
30
31
32
FCBIOOUT
FCBIOBUF
FCBCONCR
FCBCONMS
FCBIOCNT
ORG
DS
DS
DS
DS
DS
FCBDSTYP+4
CL8
28
FCBTBSP
DS
OX
28
FCBDSMD
FeBITE!!
FCBBUFF
FCBBYTE
FCBFORM
FCBCOUT
FCBREID
FCBDEV
DS
DS
DS
DS
DS
DS
DS
DS
CL2
o
4
8
20
21
2C
30
34
36
38
3C
!!!!§
3D
3E
40
42
43
44
4C
50
54
58
5C
60
68
6B
g~!!~g
FCBCRT
FCBPCH
FCBDSK
FCBTAP
FCBCON
FCBRDR
FCBPTR
FCBDUM
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
FCBMODE
FCBXTENT
FCBRECL
IOBIOFLG
FCBDCBCT
FCBMEMBR
FCBOSFST
FCBOSDSN
FCBR13
FCBKEYS
FCBPDS
JFCBMASK
JFCBCRDT
JFCBXPDT
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
Concatenated DOSLIB data set
FCB for OS formatted disk
OPEN acquired this CMS block
Permanent control tlock
Special batch data set
Concatenated MACLIB data set
X'10'
X'08'
X'04'
X'02'
X'01'
A
A (special
A
1
C
X
H
Special I/O command list
A(data buffer)
A*16 Console color code
A*17 Console miscellaneous information
Length of data tuffer
H
F
F
CL2
H
F
I
1*1
in FCBDEV
--28-----
CRT
Punch
Disk
Tape
Console terminal
Reader
Printer
DUllmy device
24
20
16
12
8
4
o
X
1*2
H
H
X
X
2F
F
F
F
1
A
8X
3C
3C
Tvo tytes for tape backspace
count
Data set mode
Item identification number
A(input/outFut tuffer)
Data count
File format: fixed/variatle records
Records per CMS physical block
Number of bytes actually read
Device type code
1*3
1*4
Mode: 1, 2, 3, 4, and 5
Number of items in extent
DCB LRECL at open time
I/O flags
No. of DCBs using this FCB
OS prs member name
Pointer to CS FST
Pointer to as dsname block
Save area vector R13
ACDtS in-storage key table)
A(PtS in-storage directory)
Various mask bits
Data set creation date (YDD)
Data set expiration date (YDD)
Section 2. CMS rata Areas and Control Blecks
181
FCBSECT
Hexadecimal
Displacement
6E
6F
70
71
71
72
74
75
76
77
7A
7A
7C
7C
7D
7E
7E
80
80
82
Field
Naae
Field Description, Contents, !eaning
JFCBIND1
JFCBIND2
JFCBUFNO
JFCBFTEK
JFCBFALN
JFCBUFL
JFCEROPT
JFCKEYLE
JFCLIMCT
FCBDSORG
JFCDSORG
FCBRECFM
JFCRECFM
JFCOPTCD
FCBBLKSZ
JFCBLKSI
FCBLRECL
JFCLRECL
FCBIOSi
!!i::!:§
x
X
X
X
X
X
A*9
A*10
3X
OX
2X
OX
A*11
X
A*12
A*13
X
OH
H
OH
H
X
1X
!!!:!:§
g~!!!!~g in FCBIOSW2
FCBMVFIL EQU --X'08'---FCBMMV
EQU
X'02'
FCBMVPDS EQU
X'01'
84
84
88
8S
8C
DEBLNGTH DS
DS
IHADEB
DS
DEBTCBAD DS
SEBSAV
DS
90
94
98
DEBOFLGS DS
DEBOPATB DS
IOBFLG
DS
!!!:!:§
98
9C
AO
AO
AO
A4
g~!!!!~g
IOBBFLG
IOBOUT
lOB IN
IOBUPD
EQU
EQU
EQU
EQU
IOBNXTAD
IOBECB
IHAIOB
DEBDEBID
DEBDCBAD
IOBECBCC
DS
DS
DS
DS
DS
DS
!!!:!:§
OX
F
OD
A
F
4X
4X
OX
in IOBFLG
--0-----X'40'
X'20'
X'10'
A
F
OF
OX
A
OX
g~!!!!~g in IOBECBCC
IOBBECBC EQU --12------IOBBECBP EQU
12
182
A*8
H
in FCBIOSW
EQU --X'80'--EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'OS'
EQU
X'04'
EQU
X'02'
EQU
X' 0 l'
FCBIOSi2 DS
A*5
A*6
A*7
OX
X
g~!!!!~g
FCBCLOSE
FCBCLEAV
FCBPROCC
FCBPROCO
FCBCASE
FCBPVMB
FCBIOWR
FCBIORD
S3
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
A*14
Indicator one
Indicator two
Number of buffers
Buffering technique
Buffer alignment
Buffer length
Error option
Key length
Reserved for IBM use
EDAM search limit
Data set organization
Data set organization
Record format
Record format
Option codes
Block size
Block size
Logical record length
Logical record length
I/O operation indicator
Switch turned on during CLCSE operation
DISP=LEAVI during CLOSE operaticn
GOTO FCBPROC during CLOSE cperation
GO TO FCBPROC during OPEN oFeration
ON=LOWER CASE console I/C
PUT-MOVE-VAR-BLK
WRI'II/PUT
REAI/GET
A*15 I/O operation indicators
Move file is active
Move PDS switch for FIND
Switch for MOVEFILE with PIS option
Length of DEB in doutlewords
Reserved for IBM use
Data extent block
A(.ove-mode user buffer)
Dynamic save for SEB return address
(OS input/output simulation)
Data set status flags
OPEN/CLOSE option tyte
Start of IOEPREFIX for nor.al scheduling
Displacement of lOB flag in IeB
WRI'II,PUT in progress
RBAI,GBT in progress
QSAM PUTX in progress
A(next buffer to be used)
BCE for QSAM normal scheduling
Input/output block
DEE identification
A(data control block)
ECB completion code
Displacement of ECB code in ICB
Displacement of ECB pointer in lOB
IBM VM/370 Data Areas and Control Block Logic
FCBSECT
Hexadecimal
Displacement
A4
A8
Field
Name
Field Description, Contents, Eeaning
IOBECBPT DS
IOBFLAG3 DS
A
OX
A(event control block) - see IBADECB DSECT
I/O error flag
IOBBCSW
16
Displacement of CSi in lOB
8X
EQU
A
B4
IOBCSW
DS
IOBSTART DS
IOBDCBPT DS
A
Last CCW stored (that is, residual ceunt)
X'It-NEXT BUFFER',AL3(INITIAL BUFFER)
A(data control rlock)
B8
B8
IOBEND
FCBEND
ox
aD
End ef input/output tlock
End of FCE, JFCB, DEB, and lOB blocks
(*-FCBSECT)/8
Size of FCB entry in dourlewords
A8
BO
DS
DS
FCBENSIZ EQU
Section 2. CES rata Areas and Contrel Blocks
183
FCHTAB
FCHTAB contains a fetch/load parameter list that points to a 3q-tyte directory list. The
fetch table is used when a DOS program issues a LOAt or FEtCH request without the LIST=
para.eter~
The IJBFTTAB field in the SISCO! block in the DOSCON CSECT of NUCON points tc
the fetch table.
o
FCHAPHNM
1 A*1
DIRNAftE
8
10
18
o
q
5
8
10
13
14
16
1S
DIRTTR
A*3
DIRRR
28
DIRVEE
1A
1D
20
22
23
26
27
DIREEE
DIRAAA
1*5
Field
Naae
1/1*6//1
Field Description, Contents, Meaning
§-~I!~ f~!~~~!~! ~!§!
FCHAPHNM DC
FCHOPT
DC
FCH1LSNM DS
PO!!!!!Y to
A (DIRNAME)
X'OO'
A*1
AL3
J!-fi!~ Q!!~£!.Q!I~!,§!
DIRNAME DS
CLS
DS
XL3
DIRTTR
DS
XL1
DIRN
DS
XL2
DIRTT
DIRLL
DS
XL2
DIRC
DS
XL1
A*2
A*3
--X'SO'
f!~£!2!I
1!st
Address of phase name
Options
Address of listname
Phase name
Phase TTR
No. of halfwords in direct cry
No. of text blocks in phase
Length last text block
Flag byte
SELFREL
RELPHSE
SVAELIG
SVAPHSE
PCLPHSE
PNOTFND
DACTIVE
NOTEXT
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
DIRT
DIRPPP
DIREEE
DIRRR
DIRR
DIRAAA
DIRK
DIRVEE
DS
DS
DS
DS
DS
DS
DS
DS
XL1
XL3
XL3
XL2
XL1
XL3
XL1
XL3
FCHLENG
EQU
*-FCHTAB
Total length in bytes (X'2A')
(FCHLENG+7)/8
Total length in doublewords
FCHLENDW EQU
18q
DIRLL
DIRPPP
~!!§ g~!!ll~g in DIRC
19
DIRTT
A*2
I/A*q//I
20
Hexadecimal
Displacement
FCHALSNM
Phase self-relocatable
Phase to be relocated
Phase SVA eligible
Phase in SVA
Phase in private core image library
Phase not found
Phase directory active
TEXT=NO specified
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
A*4
A*5
A*6
Reserved for IBM use
Phase load point
Phase entry point
No. of RLU items in phase
No. of additional RLD blocks
Partition start address
Reserved for IBM use
Phase entry point in SVA
IBM VM/370 Data Areas and Control Block Logic
(X'06')
FICL
FICL is
blocks.
a 2-byte table
used in CMS/DOS
to address
system and programmer
logical unit
Byte 0 of FICL Foints to the first system class logical unit in the LUB table. This is
always the first entry in the LUB table.
The second byte points to the first programmer
class logical unit in the LUB table partition area.
The FICLPT field in the BGCOM blcck points to the FICL block.
o
1*1 I 1*2
J
Hexadecimal
Displacement
o
1
Field
Name
SYSINDX DC
PROGINDX DC
Field Description, Contents, Meaning
AL 1 (0)
A11 (14)
A*1
A*2
First BG system LUB index
Programmer LUBs index
Section 2. CMS tata Areas and Control Blocks
185
FRDSECT
FRDSECT describes the fields used by D~SFRE to reference the four free chain element
header blocks. FRDSECT is invoked by the macro D~SFRT. The D!SFRT DSECT is pointed to
ty a v-constant in D~SFREE, and also by the lD!SFRT field in NUCCH.
0
r
FREELN
8
FREELU
10
18
FREEHN
20
28
FREEHU
30
38
40
lFREET1B
48
lC1LL
Hexadecimal
Displacement
o
10
20
30
Field
Hame
FRBELOW1
1*1
1*2
Field Description, Conte_nts, Beaning
lhe !.Qll.Q!!1!g Are the Four Free Chain Element Header Blocks
FREELH
DC
-3F'0';IL1(FLiu+FLPA:iuciEY:HUCCODE,0) -Lov-storage nucleus
Low storage user chain
FREELU
DC
3F'0',AL1(0,USERKEY,USERCOIE,O)
3F'0',AL1(FLNU.PLHC,NUCKEY,HUCCODE,O) High storage nucleus
FREEHN
DC
High storage user chain
FREEHU
DC
3F'O',AL1(FLHC,USERKEY,USERCODE,O)
lh~
!.Q!l.Q!!1!g ~I!~.Q!!£ ~gyg!~§ ~~§£!!~~ !h~ !.Q~at of ~~£~ .Q£ the
Four Free Chain Element Header Elocks
pOliTEi--EQu---O------- ------Polnter to first free element
NU!
EQU
4
Number of elements in chain
!AX
EQU
8
!aximum size of an element
FLAGSEQU
12
Flag byte
~!!§ g~!ij!~g
FLCLH
FLCLB
FLHC
FLHU
FLPA
EQU
EQU
EQU
EQU
EQU
SKEY
EQU
~!!§ g~!!j!~g
USERKEY
NUCKEY
186
EQU
EQU
in FLAGS
--X'SO'
X'qO'
X'20'
X'10'
X'08'
Cleanup flag
Overlaid chain flag
High storage flag
Nucleus flag
Page availatle on chain
13
Storage key for this chain
in SKEY
--x'io'
X'FO'
User storage key
Nucleus storage key
IBM VM/370 Data Areas and Control Block Logic
FRnSECT
Hexadecimal
Displacement
Field
Nalle
Field Description, Contents, !eaning
TCODE
EQO
14
FREETAB table code
~it§ g~!!1!~g
USERCODE
NOCCODE
TRNCODE
OSIRCODE
SYSCODE
IUXCODE
in TCODE
EQU --1----EQO
2
EQO
3
EQO
4
EQO
5
EQO
5
*ONOSED EQO
BLOCKLEN EQO
15
16
44
AFREETAB DC
FREELOW1 DS
F
48
lCILL
1
40
Ilag§
4C
DS
2~!
Symbolic length of block
Address of PREETAB table
Original value of FREELOWE
(set by INIT2)
Address of caller (for errors)
A (0)
!!I ~!~!!g!1!g
FREEFLG1 DC
User free storage page
Nucleus free storage page
Transient area page
Oser area page
System page
Maximum possible code value
SV~
BL1'0'
201
1*1
in FREEFLG1
EQO --X'SCj",---EQO
X'40'
EQO
X'20'
EQO
X'10'
EQO
X'08'
EQO
X'04'
EQO
X'02'
EQO
X'01'
~.!!§ g~!!1!gQ
FRF1C
FRF1V
FRF1N
FRF1E
FRF1L
FRF1H
FRF1M
FRF1B
%h~
4D
Conditional request
Variable request
Nucleus request
FREE (vs FRFT) request
Low storage is OK
High storage is OK
Messages wanted on error
TYPCALL equals BALR in macro
IQllQ!!.ng !!I!g !!Q1Q§ Il~g§
FREEFLG2 DC
BL1'0'
X'10'
X'08'
X'04'
Free Chain Element
POINTER--EQU---O-SIZE
EQO
4
!g
th~
]2MSIRE
ROy!.!~
Cleanup flag
Variable pages request flag (SCHVPGE)
Second initialization routine has not yet been
called by DMSINS
Do a check each time FREE or FRET is called
Do a check this time
Executing CHECK routine now
~~u
EQO
EQO
EQO
In!§!:~l
A*2
!!.!!§ g~!!1!gg !.n I!!~~~LG~
lU"In
FRF2CL
1'80'
FRF2SVP EQO
X'40'
FRF2NOI EQO
X'20'
FRF2CKE
FRF2CKT
FRF2CKX
Ha!.~!Q£g ~gde
Qg§£!:!E!!Q~
Pointer to next FREE element
Size of this element in bytes
Section 2. CMS rata Areas and Control Blocks
187
FSCBD
FSCBD is a PLIST defined for general use by routines that use the CMS file syste..
is generated when the user invokes the FSCBD .acro.
o
FSCBCO!!
8
FSCBFN
10
FSCBFT
18
o
1A
1C
20
24
25
26
28
188
FSCEBUFF
FSCBlTNO
20
FSCBSIZE
28
FSCBNORD
Hexadecimal
Displacement
8
10
18
FFSCBFM
F*1
Field
Na.e
FSCBCOMM
FSCBFN
FSCBFT
FSCBFM
FSCBlTNO
FSCBBUFF
FSCBSIZE
FSCBF.'
FSCBFLG
FSCBNOlT
FSCBNORD
FSCED
F*2
FSCBNOIT
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
EQU
DS
DS
CL8
CL8
CL8
CL2
H
F
F
CL2
FSCBFV ... 1
H
A
F*1
F*2
File system comaand (RDBUF, WRBUF, etc.)
Filena.e
Filetype
Filellode
Relative record number to be read/written
Address of read/write buffer or of STATEFST
Length of buffer
RECFM -- C1J1 o~_C~y1
Flag byte
Number of records to be read/written
Number of bytes actually read
IBM VM/310 Data Areas and Control Block Logic
FSTD
FSTD descrites the fields in a 40-byte file status table entry as found by STATE, STATEW,
DftSLFS or DftSLFSW. FSTD is functionally equivalent to the FSTSECT DSECT.
o
FSTFHAftE
8
FSTFTYPE
10
FSTDATEW
FSTTlftEW
FS'IiRPNT
FSTRDPHT
18
FSTFftODE
FSTRECCT
FS'IFCLPT
F*1
FS'IELKCT
FSTYEARW
FSTLRECL
20
Hexadecimal
Displacement
-----------0
8
10
12
14
16
18
1A
1C
1E
1F
Field
Naae
Field Description, Contents, Beaning
FSTFNAftE
FSTFTYPE
FSTDATEW
FSTTIl'!EW
FSTWRPHT
FSTRDPHT
FSTFftODE
FSTRECCT
FSTFCLPT
FSTRECFft
FSTFLAGS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1D
1D
1H
1H
1H
1H
1H
1H
1H
1C
1X
F*1
F*2
in FSTF1AGS
EQU --X'CO'---EQU
X'80'
EQU
X'40'
EQU
X'07'
EQU
X'04'
10' ~"'11"'" U1)
EQU
1'02'
FSTACTPT EQU
X'01'
FSTRODSK EQU
X'OO'
!!i!§
g~!!~g
FSTXWDSK
FSTRWDSK
FSTXRDSK
FSTFILEA
FSTACTRD
.&.
20
24
26
F*2
aJ.&.A""' .... n.l..,\
Filename
Filetype
Date last written - .addyy
Time last written - hhmmss
write pointer - item number
Read pointer - item number
File.ode - letter and number
Number of logical records
First chain link pointer
Record format (F or V)
FST flag byte
Extension of read/write disk
Read/write disk
Extension of read-only disk
File is active (one of the following)
File active for reading
File active for writing
File active from a point
Read-only disk
Jlit§ !~g~!!~g
FSTDIA
EQU
FSTDRA
EQU
FSTDNI
EQU
for use
i'40'-X'01'
X'OO'
!!! RDBUF
FSTLRECL DS
FSTBLKCT DS
FSTYEARW DS
1F
1H
1H
Logical record length
Number of 80Q-byte blocks
Year last written
FSTDSIZE EQU
(*-FSTD)
FST size in bytes
----Item availatle
Previous record null
Hull record
Section 2. CftS Iata Areas and Control Blocks
189
FSTSECT
FSTSECT defines the file status table (FST) which describes the attributes cf a file on a
CMS virtual disk. FSTSBCT is invoked by the macro FSTB.
The file status tables for all files on the disk are grouped into SOO-byte disk records
referred to as file status table blocks (FSTEs). Each file status table block can
accommodate up to 20 file status tables.
o
FSTN
S
FSTT
10
FSTD
1S
FSTIC
FSTM
20
Field
Name
0
S
10
14
16
lS
1A
1C
lE
1F
FSTN
FSTT
FSTD
FSTWP
FSTRP
FSTM
FSTIC
FSTFCL
FSTFV
FSTFB
FS'IIEC
1*1
1*2
FSTYR
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1D
1D
1F
1H
lH
1H
1H
1H
1C
1C
A*1
A*2
2I!I!
FSTFRWX
EOU
X'CO'
FSTFRW
FSTFROX
EOU
BOU
X'SO'
X'40'
FSTFACT
FSTFIR
FSTFIW
FSTFAP
FSTFRO
EQU
EQU
EQU
EQU
EOU
X'07'
X'04'
X'02'
X'01'
X'OO'
Filename
Filetype
Date/tille last written
Write pointer (item number)
Read pointer Cite. number)
Filellode
Item count
First chain link
Fixed (F)/variable (V) flag
Flag byte (if used)
(!EE11£!~lg g~lI
2! ~!IT!! £gll)
to STA1!FST COp! £!
FS1-~!!I
Read-only extension of read/write
disk
Read/write disk
Read-only extension of read-only
disk
File is active (one of the follcwing)
File active for reading
File active for writing
File active fro. a designated point
Read-only disk
~i!§ !~g~!1~~g
FSTITAV EQU
FSTRECAV BQU
FSTNOIT EQU
for use
1'40'-X'Ol'
X'OO'
FSTIL
FSTDBC
FSTYR
DS
DS
DS
1F
1H
1H
Maximum item length
SOO-tyte data block count
Year
FSTL
BQU
*-FSTSECT
Size of FST in bytes (X'2S')
!~
!!IEg!!212£! Parameters
800------FSTFWDP EQU
FSTBKWD EQU
S04
E~I
190
FSTRP
--------------------------------------
~i!§ g~!i~gg 1~ E2IE~
~ft~ §y££g§§!yl
20
24
26
FSTCL
FSTIL
Hexadecimal
Displacement
------------
FS'IliP
RDEUF
----Item availatle
Previous record null
Null record
Forward pointer to next hyperblock in storage
Backward pointer to previous hyperblock in
storage
IBM VM/370 Data Areas and Control Block Logic
FVSECT
FVSECT is used mainly by file management and I/O routines. FVS contains save areas, work
areas, and commonly used constants. A typical use of FVS is when a reentrant I/O routine
requires a work area or save area, since the routine cannot modify itself.
FVSECT is
invoked by the FVS macro.
~I--------------------------------------------'--------------'
01
DISK$SEG
I
I
I------------------------~
REGSAV3
38!
1-------------------------------------------------------RWFSTRG
781
1-------------------------------------------------------ADTFVS
1------------------------------------------------------REGSAVO
C81
COl
I
A*1
100
REGSAV1
108
148
F65535
FW4
150
VFREE
F10C
Section 2. CMS tata Areas and Contrel Blocks
191
FVSECT
,
158
VFRET
JSRO
160
JSR1
R1UHD
168
F800
170
FVSDSKI
DSKLOC
178
RWCNT
DSKIDR
180
ADTADD
188
FINISLST
FFF
198
lAO
FFD
FFE
lA8 //////1 1*5
1BO
FVSER1Sl
lB8
REIDCNT
FVSERlS2
1///////////////////////////
FVSFSTN
lC8
FVSFSTT
1D8
FVSFSTDT
FVSFSTM
A*3 I 1*4
FVSER1S0
I 1*7
1CO
1DO
192
1*6
SIGNAL
FVSFSTIC
1EO
FVSFSTIL
lE8
FVSFSTID
FVSFSTRP
FV~FSTiP
FVSFSTCL
1*8
FVSFSTYR
FVF~TDB
IBM VM/370 Data Areas and Control Block Logic
I 1*9
FVSFSTAC
FVSECT
Eexadecimal
Displacement
----------0
3C
78
CO
C8
104
107
Field
Name
Field Description, Contents,
DISK$SEG
REGSAV3
RWFSTRG
ADTFVS
DS
DS
DS
DC
15F
15F
1aF
2F'0'
For FSTLKP, FSTLKW, ACTLKP, TBKIKP, CQTRK
For RtEUF, WRBUF, FINIS, S~ATE, FOINT
Remaining storage for RDEUF, WREUF, FINIS
ADTLKP
REGSAVO
DS
DC
DC
15F
AL3 (00)
AL 1 (*-*)
Saved RO-R15
First 3 bytes of return code
Error code
ERRCODO
A*1
TRKLSAVE EQU
REGSAVO
For
REGSAV1
ERRCOD1
F65535
FW4
DS
DC
DC
DC
DC
15F
AL3 (00)
AL 1 (*-*)
F'65535'
F'4'
Register save area
First 3 bytes of return code
Error code
= X'COOOFFFF'
Constant value
HW4
EQU
FW4+2
Constant value
150
154
158
15C
160
VFREE
Fl00
VFRET
JSRO
JSR 1
DC
DC
DC
DC
DC
V (FREE)
F'100'
V (FRET)
F'O'
F'O'
Constant value
Constant value
Address of FRET (into R15)
RO saved here for FRET calls
R1 saved here for FRET calls
Address of l!FD
800 l:ytes
10a
144
147
148
14C
164
RiHFD
DC
i (*-*j
168
16C
170
FaOO
DC
DC
DC
F'aOO'
A(HW4)
A (*-*)
174
DSKLST
DS
OF
i74
DSKLOC
DS
178
17C
180
184
18C
194
19C
RWCNT
DSKADR
ADTADD
FINISLST
DC
DC
DC
DC
DC
DC
DC
A (*-*j
A (*-*)
A (*-*)
A (*-*)
CLa'FINIS'
CL8'*'
CL8'*'
CL2'*'
DS
DC
DC
DC
OH
X'FFFF'
X'FFFE'
X'FFFD'
19E
19E
1AO
1A2
~eaning
FVSDSKA
FFF
FFE
FFD
A*2
~RKLKP/X
only when called by QQTRK/X
Address of the active disk table
All-purpose RDTK/WRTK PLIS~
Address of item to ~e read or written
Byte count (usually 800)
Disk address of item to l:e read or written
Address of active disk table now in use
PLIS~ to close all files
Halfword constants
Means no significant data Fast 215th byte
1968-era ~FI still supported on input only
Newest signal for 2314 handling
Section 2. CMS Iata Areas and Control Elocks
193
FVSECT
Hexadecimal
Displacement
lA4
Field
Name
Field Description, Contents,
SIGNAL
DC
SIGNAL
H'O'
~eaning
= Scratch halfword used by READMFD
or ERASE
= COCO, X'FFFP', X'llFE', or X'PFPD'
00, Fl, FE, or FD
lA6
UFDBUSY
!!i!§
DC
X'OO'
A*3
in UFDBUSY
EQU --X'80'--EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
g~!i1!~g
WRBIT
UPBIT
FNBIT
ERBIT
DIOBIT
Nonzero means UFD is being updated
WREUF
UPDISK - READMlD
PINIS
ERASE - ALTER - READFST
RDTK/WRTK
DMSAEN (atend recovery routine)
tMSI1S (SVC handling routine)
lA7
KXFLAG
lAB
lAC
lBO
lB4
lB8
lBC
in KIP LAG
EQU --X'80'-EQU
X'Ol'
FLGSAVE
FVS:FLAG
DC
DC
DC
X'OO'
X'OO'
X'OO'
~i§~1.!gl!~2Y§ ~!2!gg~
ERSFLAG
PVSERASO
FVSERASl
FVSERAS2
READCNT
DC
DC
DC
DC
DC
DC
£:il~ ~!g!Q§
STATEFST
FVSFSTN
FVSFSTT
FVSFSTDT
FVSFSTWP
FVSFSTRP
FVSFSTM
FVSFSTIC
FVSFSTCL
FVSFSTFV
FVSFSTFB
FVSFSTIL
FVSFSTDB
FVSFSTYR
lE8
FVSFSTAD DC
STATERO
194
A*4
g~!!1!~g
lCO
lCO
lC8
lDO
lD4
lD6
lD8
lDA
lDC
lDE
lDF
lEO
lE4
lE6
lEC
X'OO'
KXWANT
KXWSVC
!!i!§
lA8
lA9
lAA
DC
DS
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
EQU
X'OO'
F'O'
P'O'
P'O'
P'O'
P'O'
Table
---aD
(£:~~)
D'O'
D'O'
2H'0'
H'O'
H'O'
H'O'
H'O'
H'O',
C'
X'OO'
F'O'
H'O' ,
2C'
A(0)
HX wanted as soon as possible
Hold HX until any SVC activity
A*5
A*6
Reserved for IBM use
Par scratch use (for example, by RELUPD)
Par general use (as needed)
~RA~!
(QI !!!1!AM~)
Plag for use by ERASE or RENAME
RO to/from FSTLKW (for ERASE)
Rl to ACTLKP or PSTLKW (for ERASE)
Address of free storage used by ERASE
Current read count (DMSBRD)
Reserved for IBM use
£2.£1 from S'IATE
-Pull-PST-of file (STATE)
Pilename
Piletype
Date/time last written
Write pointer Cite. ID)
Read pointer (item ID)
File.ode
Numher of items in file
tisk address (first chain link)
A*8 Fixed (F)/variable(V) indicator
A*9 Flag byte
Length of largest item in file
Number of data tlocks
Year last written
A(active disk table for this file)
FVSFSTAD
FVSFSTAC DC
A(0)
STATER 1
FVSFSTAC
EQU
HX flags
A(real PST entry for this file)
IBM VM/370 Data Areas and Control Block Logic
IBADECE
IHADECB, which is invoked via the CMSCB macro, is the simulated data event control blcck
used for CMS processing of OS macros and OS access methods. The ICEECBPT field in
FCBSECT points to IBADECB.
o
DECSDECB
8
DECDCBAD
DECAREA
10
DECIOBPT
DECKYADR
18
DECRECPT
Hexadecimal
Displacement
-----------0
4
Field
Name
DEC'IYPE
DECLNGTB
Field Description, Contents, Meaning
DECSDECB DS
DECTYPE DS
F
H
Event control block
Type of I/O request
~!!§ Q~!!neQ
6
8
C
10
14
18
DECBRD
DECBWR
in DECTYPE
BQU --X'80'--EQU
X'20'
Read SF
Write SF
DECLNGTB
DECDCBAD
DECAREA
DECIOBPT
DS
DS
DS
DS
B
A
A
A
Length of key and data
V(data control tlock)
V(key and data, buffer)
V (IOE)
A
A
V (key)
V(block reference fieldj
!m!~ ~!!g1!§!521!
DECKYADR DS
DECRECPT DS
Fr~gy~1!!11 ~§~Q ~gy~!g§
DDNAM
BLK
BS
DA
FXD
IS
LOC
MOV
PS
PO
PREVIOUS
QS
UND
VAR
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
FCBDSTYP
X'10'
X'20'
X'20'
X'80'
X'80'
X'08'
X'10'
X'40'
X'02'
X'80'
X'40'
X'CO'
X'40'
Filetype = data set name
RECFM=blocked records
!UCRF=BSAM
DSORG=direct access
RECFM=fixed-length records
DSORG=indexed sequential
MACRF=locate mode
!UCRF=move mode
DSORG=physical sequential
DSORG=partitioned organization
OFLGS=previous I/O operaticn
MACRF=QSAM
RECFM=undefined format records
RECFM=variatle-length records
Section 2. CMS rata Areas and Control Blocks
195
IOSECT
IOSECT describes the fields used by DftSITI for save registers, I/O cld PSi, and other
data when handling I/O interrupts. IOSECT is pointed to by the AIOSECT field in NUCON.
o
lOS AVE
40
AUSRITBL
IONTABL
AUSRILS7
48
50
OLDEST
60
NEXTO
70
IOPSi
78
IOCSi
HOLD
80
88
Hexadeci.al
Displace.ent
o
40
44
48
4C
50
60
70
78
80
84
86
88
196
VSTRANGE
1///1//////////
--------·------------------------------------~~~----I
//////////////////////////////1/////////1///1//////////1,
Pield
Na.e
IOSIVE
DS
IONTIBL DC
AUSRITBL DC
DC
AUSRILST DC
OLDEST
DS
NEXTO
DS
DS
IOPSi
DS
IOCSi
HOLD
DC
VSTRANGE DC
DC
DC
Pield Description, Contents, !eaning
16P
P'O'
A (0)
P'28'
A (0)
4P
4P
2P
2P
P'O'
H'O'
1H' O·
2P'0'
Register save area
Size of user interrupt table in doublewords
Address of user interrupt table
Length of each entry
Address of last entry in table
Oldest I/O old PSi and CSi
Next oldest I/O old PSi and CSi
Newest I/O old PSi
Newest CSli
Holds entry pointer for device
Unknown device address saved here
Reserved for IB! use
Reserved for IB! use
IBM VM/370 Data Areas and Control Block Logic
KEYSECT
KEYSECT defines the key table used in os simulation
KFYSECT is built dynamically from CMS free storage.
KEYLNGTH
0
files for
I/O by
key.
rATAINE
8
KEYOP
10
KEYNAME
18
KEYTYPE
20
of BDAM
KEYMODE
28
KEYTBLNO
KEY'IBLAD
TBLLNGTH
A*l
1*2
KEYCOUT
30
KEYTIELE
Hexadecimal
Displacement
-----------0
4
8
10
18
20
22
24
28
2C
2D
2E
30
34
Field
Name
KEYLNGTH
DATAEND
KEYOP
KEYNAME
KEYTYPE
KEYMODE
KEYTBLNO
KEYTBLAD
TBLLNGTH
KEYFORM
KEYCHNG
KEYCOUT
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
KEYTABLE DS
1F
1F
2F
2F
2F
lH
1H
IF
1F
1X
1X
1H
1F
OF
--------------------------------------
1*1
A*2
Key length
Pointer to last data item in file
Start of PLIST for keys file
Filename of keys file
Filetype of keys file
File!!!ode of keys file
Item number of key table
Address of key table
Eyte size of key table
Format of keys file
Indicates change in key table
Blocking factor of key table
Number of bytes read
Start of keys table (item number)
Section 2. CMS rata Areas and Contrel Blocks
197
LDRST
LDRST describes the fields of
ottained and built by DMSLDR.
storage.
the work area used by the loader. The work area is
LDRST is built dyna.ically ty D!SLDR fro. CMS free
I
o
8
10
18
20
28
I
GPRSAV
~-------------------------I
I
LOCSAV
------------------------------------------------------1
RETT
LCCCT
I
------------------------------------------------------1
BRAD
TELREF
1
------------------------------------------------------1
A*1
A*2
TBLCT
A*3 1//////1/////1///////1
----------------------------------------------------1
/////////////1//////////////1/////1///////1/////////////1
30
RLDCONST
38
RETREG
PARMLIST
SPEC
358
360
ESIDTE
558
APSV
560
598
TEMPST
SAO
5A8
FILE
5BO
REAtEUF
5B8
FNAME
5CO
FTYPE
5C8
5DO
198
CRDPTR
TMPLOC
RITEM
FMODE
RLENG
RADD
RFIX
IBM VM/370 Data Areas and Control Elock Logic
RNUM
LDRST
,
NUKBYTE
5D81
I--------------------------~
FINIS
5EOI
1----------------------------------------------------A*4 1////////////////////1
5F81
I
I
5FC
SYSUT1 (44 bytes)
628
TYPLIN
630
TYPREAD
638
DSKLIN
DSKAD
650
658
HEX CON
660
•
IOUTPUT
670
OUTBUF
PRVCNT
6DO
6D8
SAV67
' .... n
o.r.v
ENTIA!!E
6E81
ENTADR
K!ftBOUND
1--------·-------------------------------------------PLISTSAV
6FOI
1--------·-------------------------------------------REG13SAV
A*5
8FOI
Section 2. CftS tata Areas and Control Blocks
199
LDRST
Hexadecimal
Displacement
o
C
10
14
1S
1C
20
Field
Name
GPRSAV
LOCSAV
RETT
LOCCT
BRAD
TBLREF
FLAG1
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
~J::!;§ g~!i!l~g
21
ABSOLUTE
FSTXTADR
COIU!OBEI
PREXIST
ENDCDADR
NOERASE
WORKFILE
NODUP
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
FLAG2
DS
~i!§ g~!i!l~g
22
24
STRINITC
NOIUP
APRILB
NOAUTO
TYPE
NOREP
NOINV
NOLIBE
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
TBLCT
FLAG3
DS
DS
3F
F
F
F
F
F
X
A*l
R9 through R12
Base register contains A(D!SLDRA)
Return register for D~SLSB
(LOCeNT) next load location
(STRT1DDR) start execution address
(lLtRTBL) top of loader table
Loader switches (permanent)
in FLAGl
-i'80'-
Absolute loading
First text address saved
Common entries exist in loader table
PR entries exist in loader table
Allow end card address
Do not erase the load map
Work file (SYSUT1) exists
Do not type message DMSLI0202W
X'40'
X'20'
X'10'
I'OS'
X'04'
X'02'
X'01'
x
1*2
Loader switches (permanent)
in FLAG2
-i'80'--
Call STRINIT in LOAD MOD
Do not create a load map
REP card processing control
No automatic text deck checking
Type load map at terminal
No REP card printing
No invalid card typeout
Bo automatic TXT library searching
X'40'
X'20'
X'10'
X'OS'
X'04'
1'02'
X'01'
H
X
A*3
Number of entries in loader table
flags
~ore
Processing names from command list
25
26
30
34
3S
3C
3SC
SSC
S9C
SAO
SA4
SAS
SBO
SBS
SCO
SCS
SCA
SCC
SDO
SD4
SD6
200
DS
DS
RLDCONST DS
PARMLIST DS
RETREG
DS
SPEC
DS
ESIDTB
DS
APSV
DS
TEMPST
DS
TMPLOC
DS
CRDPTR
DS
FILE
DS
READBUF DS
FNAME
DS
FTYPE
DS
FMODE
DS
RITEM
DS
RADD
DS
RLENG
DS
RFIX
DS
RNUM
DS
X
SH
F
F
F
200F
2568
16F
F
F
F
D
2F
2F
2F
8
H
F
F
H
H
Reserved for IB~ use
Reserved for IBM use
Relocation constant
Updated parameter list pointer
Return register
10-card input buffer
256 ESD entries; otject deck
Register save area for subroutine calls
Temporary RLD routine storage
Temporary storage
Input card pointer
Save location for DMSLIB
Input read parameter list
Filenalle
Filetype
File.ode
Number of items
Buffer address
Buffer length
Fixed/variatle flag byte
Number of items
IBM VM/310 Data Areas and Control Block Logic
LDRST
Hexadecimal
Displacement
5D8
5DC
5F8
Field
Name
Field Description, Contents, Meaning
NUMBYTE
FINIS
FLAGS
DS
DS
DS
F
START
ONEDYNA
ESD1ST
NOSLCADR
SET LIB
CLOSELIB
LUNDEF
RESET
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X"01"
Start execution requested
One call to dynamic loading per text file
First ESt data item this card
No address field in SLC card
Set up for library searching
Clear TXTLIE searching
Undefined entries exist in loader table
Reset "entry" specified
DS
DS
DS
DS
DS
DS
DS
3X
SYSUT1
TYPLIN
TYPEAD
DSKLIN
DSKAD
HEXCON
2F
2F
7F
13X
14X
Library search work area peinter
RLD work file PLISTs
TYPLIN parameter list
TYPLIN buffer address
Disk parameter list for load map
PACK
UNPACK
EQU
EQU
HEXCON
HEXCON+5
66F
670
OUTPUT
OUTBUF
DS
DS
X
6D4
6D8
6EO
PRVCNT
SAV67
ENTNAME
DS
DS
DS
H
2F
CL8
6E8
6EC
6FO
SFO
8F4
SF8
ENTADR
MEMBOUND
PLISTSAV
REG13SAV
FRSTSDID
END FREE
DS
DS
F
DS
64D
DS
DS
DS
F
X
NEED
EQU
5F9
5FC
628
630
638
654
661
7F
X
A*4
l1F
Number of bytes actually read
FINIS parameter list
Loader switches (nonpermanent)
Hexadecimal constant
Hexadecimal constant
Hexadecimal constant
100X
F
A*5
Output buffer for load map and terminal
printing
Address of next PR load address
Temporary save area of R6 and R7
Entry name (reset ENTRY or entry control
card)
Entry name's loader table location
Low extend of free storage (FREELOiE)
LOAD (INCLUrE; PLIST saved
Address of LDRST
First section definition identification
OD
(ENDFREE-LDRST)/8
The following equates refer to displacements and flags in the
REFTABLE entry usually pointed to by register 12
!g!~:
REFNAME
REFLG1
REFPRB
REFPRH
REFPRF
REFPRD
REFUND
REFCXD
REFCOM
REFiEX
REF NOB
REFLIB
REFINFO
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
REFVAL
REFLG2
REFCMD
EQU
EQU
EQU
o
8
X'7C'
X'7D'
X'7E'
X'7F'
X'80'
X'81'
X'82'
X'83'
X'90'
X'10'
9
13
16
X'80'
Displacement of 8-byte name field
Displacement of flag byte 1
PR - byte alignment
PR - halfword alignment
PR - fullword alignment
PR - doubleword alignment
Undefined symbol
Resolve CXD
Define common area
Weak external reference
LIEE card - nonobligatory
Single bit for nonobligatory LIBE card
Displacement of relocation facter or maximum
address
Displacement of absolute or assigned value
Displacement of flag byte 2
Command line name - must resolve
Section 2. CMS rata Areas and Contrel Blocks
201
LUBTAB, LUBPR
LUBTAB is a device table that has a 2-byte entry for each symtolic name used by CMS/DOS.
The simulated LUB has 255 entries: 14 entries for the system logical units and 241
entries for Frogrammer logical units. System devices (SYSRDR, SYSIPT, SYSPCH, SYSLST,
and SYSLOG) can be assigned to alternate devices. The system and programmer tables are
defined with separate DSECTs: LUBTAB and LUBPR. LUBTAB is pointed to by the LUEPT field
in BGCOM. The address of the first LUB entry is in the first tyte of the FICL control
tlock.
System (LUBTAB)
I
0 I LUBRDR
lUBIPT
LUEPCH
I
8 I lUB10G
1//1UB1NK/////1 LUERIS
I
10 I LUBR1B
1//1UBUSE/////I//LUERIC//////1
I
18 1//1UBVIS////1 lUBCAT
LUBLST
LUBSLB
LUBCLE
Programmer (lUBPR)
o
lUB001
lUBOOO
Hexadecimal
Displacement
o
2
4
6
8
A
C
E
10
12
14
16
18
1A
o
2
4
6
8
1EO
202
LUB003
lUB004 through LU13239
8
1EO
LU13C02
lUB240
LUB241
Field
Name
2I.§te l!
lUBRDR
LUBIPT
lUBPCH
lUB1ST
lUB10G
lUB1NK
lUBRES
lUB51B
lUBR1B
lUBUSE
lUBREC
LUBC1B
LUBVIS
lUBCAT
Field Description, Contents, Meaning
1!!~.§
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
f!.Qg!g.!!!!~!
X12
X12
X12
X12
112
112
X12
112
X12
X12
112
112
X12
112
System virtual reader
System virtual input device
System virtual punch
System virtual printer
Terminal
Reserved for IBM use
Systea residence volume
Private source statement library
Private relocatable library
Reserved for IBM use
Reserved for IBM use
Private core i.age library
Reserved for IBM use
VSAM catalog
Programmer logical unit blcck
Programmer logical unit blcck
Programmer logical unit blcck
Programmer logical unit block
LU13CC4 through LUB239 are defined with DS
and XL2. Each is a prograamer logical
unit block.
Programmer logical unit tlock
lU!!§
LUBOOO
LUB001
LUB002
LUB003
DS
DS
DS
DS
XL2
X12
X12
X12
LUB240
DS
112
IBM VM/370 Data Areas and Control Block Logic
LUBTAB. LUEPB
Eexadecimal
Displacement
Field
Name
lE2
LUB241
DS
XL2
Programmer logical unit blcck
LUBP
LUBJ
EQU
EQU
0
1
Displacement to PUB pOinter
Displacement to JIB pointer
LUBL
EQU
*-LUB241
LUE length
------------
Field Description. Contents,
Section 2.
C~S
~eaning
Iata Areas and Control Blocks
203
NICL
Byte 0 of the Number In Class block (NICL) contains the numher of system class logical
units. The second byte contains the number of programmer class logical units for the
partition.
The NICLPT field in the BGCOM block points to the NICL tlock.
o
A*1
A*2
.J
Hexadecimal
Displacement
-----------0
1
204
Field
Name
BOSIS
BOPROG
Field Description, Contents, Meaning
DC
DC
AL 1 (14)
At 1 (242)
A*1
A*2
Total number of system LUBs
Total number of programmer LUEs
IBM VM/370 Data Areas and Control Block Logic
NUCCN
NUCON is the nucleus constant area of CMS.
o
IPLPSW
8
IPLCCW1
10
IPLCCW2
18
EXTOPSW
20
SVCOPSW
28
PGiiOPSi
30
MCKOPSW
38
IOOPSW
40
CSW
48
CAW
1//////II/INUCRSV1////IIIII/
50
TIMER
1//I/I/////NUCRSV2/1/11//111
58
EXTNPSW
60
SVCNPSW
68
PGMNPSW
70
MCKNPSW
78
IONPSW
80
CPULOG
88
I
90111////////NUCRSV4///////////1
MONCLASS
PERCODE
1--981
PERADDR
MCNCODE
I
AOII////////////////////////NUCRSV5//I/////////////I/11/11/
11//////////////////////////////1//////1111///1/1////////
1//1///////////////////////////1/1/////1/1//////11////III
I
I
COl
LOWSAVE
I
1------------------------------------------------FPRLOG
1601
1--------·-----------------------------------------GPRLOG
1801
L -_________________________________________________ J
Section 2. CMS Lata Areas and Centrel Blocks
205
NOCON
I
lCOI
ECBLOG
1-----------------------------------------------------SYSTEMID
2001
1------------------------------------------------------INSTALID
2201
1------------------------------------------------------SYSNAME
1----------------------------------------------------D!VICE
2681
IPLADDB
SYSADDB
2601
1
2701//////////NOCBSV6///////////1
1
'
2781
FEIBM
1-----------------------------------------------------COBBDATE
1-----------------------------------------------------2881
COBBTIME
1-------------------------------------------------------COBRCPOT
2901
COBBVIBT
1----------------------------------------------------LASTCPUT
2981
LASTVIRT
1-----------------------------------------------------2AOJ
LASTCMND
1------------------------------------------------------2A81
PBEVCMND
1-----------------------------------------------------2BOI
LASTEXEC
1------------------------------------------------------2B81
PBEVEXEC
2801
1---------------------------------------------------LASTLMOD
2COI
2C8
LASTTMOD
2DO
DATIPCMS
2D8
CLKVALMD
2EO
MACDIBC
300
MACLIBL
1------------------------------------------------------MACLBSV
TXLIBSV
1---------------------------------------------------------TXTDIBC
TOTLIBS
3501
3481
~------------------------------------------.--------~
206
IBM VM/370 Data Areas and Control Elock Logic
NUCCN
TXTLlES
358
3AO
GRS015
LOC0176
3A8
FlRSTDMP
LASTDMP
3BO
FRS06
DMPTlT
3B8 ////////////////////////////1
DMPTlTLE
SVC$202
440 II////////GLBLTABL//////////I
448
1/////1///1/1/
ERR$202
---------------------------------------------------1
A*1
1///1/1/111/11
AEAiPROC
I
A*2
---------------------------------------------------1
ABATABND
AEAiLIMT
I
----------------------------------------------------1
AUSERST
1//1///1//1/1//111///1//11111
450
458
460
468 /1/1111111111111111///1111/11
tOSLBSV
1-------------------------------------------------DOSDIRC
4701
490·
4D8
DOSLIEL
A*3
A*4
ALiASAVE
11///////////1
4EO
ABGCOM
ASYSCOM
4E8
ADOSDCSS
SVC12SAV
4FO
DOSFlRST
4F8
APPSAVE
DOSTRANS
500
MAlNLlST
MAINSTRT
508
FREELIST
FREENUM
510
MAlNHlGH
FR!ELOWE
518
FREELOWR
FREEUPPR
520
ANUCEND
AUSRAREA
DOSNUM
11/1/11//////
Section 2. CMS tata Areas and Control Blocks
207
NUCON
528
CURRS1VE
530
lDMSFRT
VC1DTLKP
538
VCADTNXT
VC1DTLKW
540
CURRIOOP
PENDRE1D
548
PENDWRIT
FS'IFINRD
550
LSTFINRD
lINTRTBL
558
10UTRTBL
560
VMSIZE
lLIRTBLS
568
STRTADDR
PRSTLOC
570
LASTLOC
LOCCNT
578
LDR1DDR
LDRRTCD
COtE203
NUMFINRD
580
NUMPNDWR
PSi
588
590
PCTCMSFS
LDRFL1GS
TBENT
I 1*5
598
PREOLD
GE'I1
1*6
DSYM
SAO
JSYM
A*7 I
5A8
ALIA SENT
5BO
DYlilEliD
1///////////////////////////
SB8 ////////////////////////////1///////////////////////////
5CO
208
FCBFIRST
PCENUM
1//////1 A*8
SC8 ////////////////////////////1
LINKLAST
SDO
LINKSTRT
TAXE1DDR
SD8
ATSOCPPL
tCBSAV
SEO
A*9
1*10
1*11 I 1*12
5E8
A*1S
A*16
A*17 1///////1
1////////////1 1*13
ISYSBAMS
SPO
ACMSSEG
AD!SLIO
5F8
VCFSTLKP
VCFSTLKW
600
AFVS
AOPSECT
608
ADEVTAB
APSTLKP
610
AGETCLK
APSTLKW
IBM VM/370 Data Areas and Control Block Logic
A*14
NUCCN
618
APIE
AIADT
620
AUSER
ARtTK
628
ASCANN
!S5T!T
630
ATABEND
ASOBSECT
638
AOSMODL
640
ASTRINIT
IAtT
648
APREE
AFRET
650
ADMSPIOC
APGMSECT
658
A~U;;).r.\..J.
A.&JD.r.l:lA .... ""
660
ADIOSECT
AAENSVC
668
ADMSERL
ADMSCRD
670
ADMSPREB
ASVCSECT
678
AADTLKP
AUPUFD
680
ASTATEXT
A05RET
688
ACMSRET
ASCANO
690
AEXEC
AS'IART
698
AADTLKW
AUSABRV
6AO
AEXTSECT
ASCBPTR
6A8
ADMSROS
6BO
AACTLKP
AACTNXT
6B8
AACTFREE
AACTFRET
6CO
AADTNXT
ATRKLKP
6C8
ATRKLKPX
AQQTRK
6DO
AQQTRKX
AERASE
6D8
ATYPSRCH
AUPDISK
6EO
AKILLEX
ATFINIS
6E8
ARDBUF
AWRBUF
6FO
APINIS
AS'IATE
6F8
ASTATEW
APCINT
.I
AWRTK
.. -r"",,.n,..m
~T\
..
n,;tV1:'ro
LtMSROS
CDMSROS
Section 2. CMS tata Areas and Control Blocks
209
NUCON
CONCCWS
700
708
710
CONINELK
718
CONINEUF
7AO
CftNDLINE
848
CftNDLIST
A60
CONSTICK
BAO
FREES AVE
BEO
BALRSAVE
C20
WAITSAVE
C60
C68
----------------------------------------------------1
PCTVSlft
1//////////////1///////////////////////////1
ADIKQLAB
-------1
NDIKQLAB
I
--------------------------------------------------1
C70
ARURTBL
ADftSVIB
I
C78
---------------------------------------------------1
IVIPWORK
A*18 1////////////////////1
---------------------------------------------------1
AVSAftSYS
AAI!SSYS
I
---------------------------------------------------1
C88
AVSREOJ
AVSRWORK
1
---------------------------------------------------1
C90
ACBLIST
1///////////////////////////1
---------------------------------------------------1
C98 ////////////////////////////1///////////////////////////1
C80
I
210
IBM VM/370 Data Areas and Centrol Block Logic
NUCCN
Hexadecimal
£isplacement
o
Field
Name
Field Description, Contents, Meaning
l1gfhill~ !!.§g~
IPLPSW
IPLCCW1
IPLCCi2
DS
DS
DS
1D
1D
iD
Initial program load of PSi
Initial program load of CCi1
Initial program load of CCi2
10
14
RSTNPSW
RSTOPSW
ACMSCVT
ASYSREF
ORG
DS
DS
DS
DS
IPLPSW
1D
1D
1F
1F
PSi restart new PSi
PSi restart old PSi
Address of simulated as CVT
Address of nucleus address table
18
20
28
30
38
40
48
4C
50
54
58
60
68
70
78
80
EXTOPSW
SVCOPSW
PGMOPSW
MCKOPSW
IOOPSW
CSW
CAW
NUCRSV1
TIMER
NUCRSV2
EXTNPSW
SVCNPSW
PGMNPSi
MCKNPSi
IONPSW
CPULOG
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1D
1D
1D
1D
1D
1D
1F
1F
1F
1F
1D
1D
1D
1D
1D
48D
External old PSi
Supervisor call old PSW
Program old PSi
Machine-Gheck old PSi
Input/output old PSi
Channel status word
Channel address word
Reserved for IBM use
Interval timer
Reserved for IBM use
External new PSi
Supervisor call new PSi
Program new PSi
Machine-check new PSi
Input/output new PSi
Processor logout area
80
NUCRSV3
ORG
DS
CPULOG
2D
Reserved for IBM use
90
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
1F
1H
1H
1F
1F
4D
XL160
4D
1CO
NUCRSV4
MONCLASS
PERCODE
PERADDR
MONCODE
NUCRSV5
LOWSAVE
FPRLOG
GPRLOG
ECRLOG
200
220
260
268
26A
26C
270
274
280
.§I.§te.! !!.§gg~
SYSTEMID DS
INSTALID DS
SYSNAME DS
IPLADDR DS
SYSADDR DS
DEVICE
DS
NUCRSV6 DS
FEIBM
DC
DIAGTIME DS
CL32
System name and date
CL64
Installation identification
CL8
Name of saved system loaded (via IPL)
1H
Address of device loaded (via IFL)
1H
Address of system disk
1F
Name of device causing last I/O interrupt
1F
Reserved for IBM use
CL12'FEIBM154067'
FE service number
CL24
Euffer for tIAGNOSE timer
280
ORG
CURRDATE DS
DIAGTIME
CL8
Current date - mm/dd/yy
CURRTIME
CURRVIRT
CURRCPUT
LASTVIRT
LASTCPUT
LASTCMND
PREVCMND
LASTEXEC
PREVEXEC
CL8
1F
1F
1F
1F
CL8'
CL8'
CL8'
CL8'
Current time - hh.mm.ss
Current elaFsed virtual time used
Current elapsed processor time used
previous elapsed virtual time used
Previous elapsed processor time used
Last command issued
Next to last command
Last EXEC procedure
Next to last EXEC procedure
8
10
o
8
94
96
98
9C
AO
CO
160
180
288
290
294
298
29C
2AO
2A8
2BO
2B8
DS
DS
DS
DS
DS
DC
DC
DC
DC
Reserved for IBM use
Monitor call class number
Progra: event recorder code
Program event recorder address
MONliOR CALL code
Reserved for IBM use
Save area for first 160 bytes of storage
Floating-point register logout area
General-purFcse register lcgcut area
Extended control register logout area
16F
16F
•
•
•
•
Section 2. CMS tata Areas and Control Blocks
211
NUCON
Hexadecimal
Displacement
2CO
2C8
2DO
2D8
2EO
300
34S
34C
350
354
358
3AO
3AO
3A4
3A8
3AC
3BO
3B4
3B8
3BC
440
444
446
44S
44C
44E
Field
Name
Field Description, Contents, !eaning
LASTLMOD
LASTTMOD
DATIPCMS
CLKVALMD
!1~f!~
DC
DC
DC
DC
!!,ng !!!!!
MACDIRC
MACLIBL
TXLIBSV
ftACLBSV
TOTLIBS
TXTDIRC
TXTLIBS
DC
DC
DC
DC
DC
DC
DC
CLS' ,
CL8'ACCESS'
D'O'
D'O'
DS
DC
DC
DC
DC
DC
DC
DC
DMPTITLE DC
GLBLTIBL DC
DC
SVCS202 SVC
ERRS202 DC
BR
DC
-------iddress of macro library directories
8A (0)
1SF'-1'
Current macro library nalles
Library save area for TXTLIES
F'O'
Library save area for MICLIES
F'O'
Total global chains (in bytes)
F'O'
A (0)
Address of TEXT library directories
Current TEXT library nalles
18F'-1'
OD
A(GPRLOG)
A(LOWSAVE)
A(O)
A(O)
A(FPRLOG)
A(DMPTITLE)
4X 'FF'
CL132"
F'O'
H'O'
202
A(*+4)
14
H' 0'
450
BATFLAG2 DC
!!.!!§
1X'00'
Batch monitor running
Loading batch processor
Suppress user job execution
Batch reader error
CP co •• and executing
User job executing
MOVEPILE executing from terminal
User job being flushed
A*2
in BATPLAG2
EQU --X'80'---EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'OS'
EQU
X'04'
EQU
X'02'
EQU
X'01'
g~!.!1!~g
BATXLIM
BATXCPU
BATXPRT
BATXPUN
BATDCMS
BATIPLSS
BATSTOP
BATSYSAB
452
212
in BATFLIGS
EQU --X'80'---EQU
1'40'
EQU
X'20'
EQU
X'10'
EQU
X'OS'
EQU
X'04'
EQU
X'02'
EQU
X'01'
g~!.!1!!!g
BATRUN
BATLOAD
BATBOEI
BATRERR
BATCPEX
BATUSEX
BATMOVE
BATTERM
454
458
45C
460
464
DEEUG DUMP PLIST
Address of GPR save area
Address of low storage save area
Address of first location to dumF
Address of last location to dU.F
Address of PPR save area
Address of duap title line
Reserved for IBft use
DUllp title line
Reserved for IBM use
Used for alignment
COli. on SVC for reentrant ccde
User will fill if necessary
Return to caller
Reserved for IBft use
Batch flags
!!.!!§
451
module LOADMOD into .ain storage
module LOIDMOD into transient area
(am/dd/yy) at last IPL C!S
(STCK fora) at midnight (0000 hours)
1!~!!!!I Pointers
Q~Ryg QY~f ~g!g!!!!!!!§
DUftPLIST
GRS015
LOC0116
FIRSTDMP
LASTDftP
FRS06
DftPTIT
Last
Last
Date
Tille
DC
2X'00'
!!~!fh ~!~f~§§~! ~,n!!I R~!1!!§
ABATPROC
ABATABBD
ABATLlftT
AUSERST
DC
DC
DC
DC
DC
A(O)
A(O)
A(O)
A(O)
2F'0'
More batch flags
User job limit exceeded
Processor time exceeded
No. of printed lines exceeded
No. of punched cards exceeded
Disabled CMS co.mand called
Batch loading (via IPL) saved system
Batch stopping after current job
System abnormal termination
in process
Reserved for IBM use
Main entry
User job abend entry
User job limits table
Virtual machine restart entry point
Reserved for IBM use
IBM VM/310 Data Areas and Control Block Logic
NUCCN
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
-----------46C
470
490
4D8
!!Q'§ b.!!!!~n
DC
DC
DC
DC
DOSLBSV
DOSDIRC
DOSLIBL
DOSFLAGS
Pointers
---Fio'8A (0)
18F '-1 •
X'OO'
1*3
ll.!!§ g~!.!!!~g in DOSFLAGS
DOSMODE EQU --X'80'---DOSSVC
EQU
X'40'
DOSVSAM EQU
X'20'
DOSCOMP EQU
X'10'
EQU
DOSPIO
X'08'
VSMINSTL EQU
X'-04'
4D9
4DA
4DC
4EO
4E4
4E8
4EC
4FO
4FO
4F6
4F8
4FC
500
504
508
SOC
510
514
518
51C
520
524
528
52C
52E
530
534
538
53C
540
544
548
54C
550
554
558
55C
SSE
DOSRC
DC
ALTASAVE
ABGCOM
ASISCOM
ADOSDCSS
SVC 12SAV
DOSFIRST
DOSNUM
DOSKPART
APPSAVE
DOSTRANS
DC
DC
DC
DC
DC
DC
DC
DC
DS
DC
DC
fil~ ~!g!gg~
MAINLIST
MAINSTRT
FREELIST
FREENUM
MAINBIGH
FREELOWE
FREELOWR
FREEUPPR
ANUCEND
AUSRAREA
CURRSAVE
CODE203
FRERESPG
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DS
ADMSFRT
VCADTLKP
VCADTNXT
VCADTLKW
DC
DS
DC
DC
~g1!sol~
CURRIOOP
PENDREAD
PEND WRIT
FSTFINRD
LSTFINRD
AINTRTBL
AOUTRTBL
NUMFINRD
NUftPNDiR
DOS environment flag
DOS SVC simulation flag
DOS iSAft running flag
DOS compiler running flag
DOS printer indicator
VSAft installation flag to relocate DCSS table
X'OO'
!*4
2X' 00'
V (LTASAVE)
V (BGCOM)
V (SISCOM)
A(0)
F'O'
A(0)
B'O'
B'O'
V(PPSAVE)
A(0)
DOS return code to user
Reserved for IBM use
Address of LTA save area
Address of partition communication region
Address of system communication region
Address of LOS DCSS
Work area for SiC 12
Address of first DOSCB in chain
Number of DOSCBs in chain
Number of K-bytes in DOS partition
Address of problem program save area
Address of ros transient area
Pointers
--i(O)"-V (USERAREA)
V(NUCEND)
F'1'
V(USERAREA)
V(NUCEND)
V (TRANSAR)
A(0)
V (NUCEND)
V (INITSUB)
A(0)
BiOi
B'2'
V(DMSFRT)
A(DMSLAD)
A(DMSLADN)
A(DMSLADW)
Pointers
UQ ---1(0)"DC
DC
DC
DC
DC
DC
DC
DC
DC
Library save area for DOSLIES
Address of ros library directories
Current ros library names
DOS simulation flags
A(0)
A(CONSTACK)
A(0)
A(0)
A(0)
A(0)
H'O'
B'O'
Address of first block of user free storage
Address of the start of user free storage
Address of first block of system storage
Number of blocks of system storage
High extend of user free storage
Low extend of systeM free storage
Lower limit of system free storage
Upper limit of system free storage
Address of end of nucleus storage area
Address of teginning of user area
Address of current save area
Code number of last SiC 203
Amount of user storage to reserve
for CftS free storage (pages: >=2)
DftSFRE work area
EALR equivalent of ADTLKP
EALR equivalent of ADTNXT
EALR equivalent of ADTLKW
Address of current I/O buffer
Address of pending read operation
Address of pending write oFeration
Address of finished read buffer
Address of last finished read buffer
Address of user input translate table
Address of user output translate table
NUBber of finished read buffers
Number of pending write operaticns
Section 2. CMS Lata Areas and Control Blocks
213
NUCON
Hexadecimal
Displacement
Pield
Name
Field Description, Contents, eeaning
1~gde!
560
564
568
56C
570
574
578
57C
580
588
58C
590
592
593
Information
VMSIZE
ALDRTBLS DC
lP'O'
STRTADDR DC
lP'O'
PRSTLOC DC
lP'O'
LASTLOC DC
lP'O'
LOCCNT
DC
lP' 0'
LDRADDR DC
IF'O'
LDRRTCD DC
lP'O'
PSW
DC
lD'O'
LDRPLAGS DC
1P'0'
PRHOLD
DC
lP'O'
TBENT
DC
H'O'
UNRES
DC
X'OO'
MODFLGS DC
1X • 00'
!!.!!§
594
598
5-AO
5A4
5A5
SAC
5BO
5B4
5CO
5CO
5C4
5C6
5C7
--ns----1P-
g~!!1!gg
EQU
EQU
EQU
EQU
EQU
MDPCALL
I10D6
I10D7
EQU
EQU
EQU
X'04'
X'02'
X'Ol'
GETl
DSYM
DC
DC
JSI-~
DC
1F ';0 ,
2F· 0'
P'O'
C'Z'
XL7'0'
1F'0'
lP' 0'
3F
DC
DC
ALIASENT DC
DYNAEND DC
DS
Q~ ~i.lYlg!!.Q1!
FCBTAB
DS
FCBFIRST DC
FCBNUM
DC
DC
OSSPLAGS DC
~i!§ g~!!!!~g
5C8
5CC
5DO
5D4
5D8
5DC
214
in MODPLGS
--X'80'---
NOMAPFLG
CLEAROP
MODGNDOS
MODGNALL
SYSLOAD
NXTSYM
COMPSWT
OSSMNU
OSRESET
OSWAlT
DYLD
DYLIBO
DYLIBNOW
DYMBRNM
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
LINKLAST
LINKSTRT
TAXEADDR
ATSOCPPL
DCBSAV
DC
DC
DC
DC
DC
DC
A*5
A*6
Virtual storage size
Address of loader tatles
I10dule starting address
Module beginning address
Module ending address
Loader location counter
Loader return address
Loader return code
User's starting PSW
Loader flags
Pseudo register counter
Initialize table entries tc zeros
Unresolved reference bit for CMS loader
Flags
NOMAP flag
CLEAR option flag
Module generated with DOS option
Module generated with ALL option
Allow load greater than FREELCWE or less
than transient
Indicate module called by DMseDI
Reserved for IBM use
Reserved for IBe use
X'40'
X'20'
X'10'
X'08'
DMSLSY R1 save location
DI1SL~Y work space
-D1!-SI.-S1- -u-n-i q-u-e id-en t i f ier ba se
A*7
First character of unique identifier
Rest of unique identifier
Alias entry point (dynamic load)
Maximum load location (dynamic load)
Reserved for IBe use
Pointers
-0i5----A (0)
H'O'
X'OO'
X'OO'
A*8
FCE chain anchor
Address of first FCB
Numter of FeBs in chain
Reserved for IBe use
OS simulation flags
in OSSFLAGS
--X'80'---X'40'
1'20'
X'10'
X'08'
X'04'
X'02'
X'Ol'
A (0)
A (0)
A (0)
A (0)
V (CPP)
IF' 0'
COlBpiler switch
DMSSMN unconditional flag
Reset for as
Wait for as
Dynamic loading in process
Omit dynamic litrary scan
Dynamic library scan
Linked via member nalBe
Reserved for IBe use
Address of last OS linkage block
Address of entry point of last module
Terminal attention exit element address
Address of !MP PLIST for TSC programs
DCE restoration address
IBM VM/370 Data Areas and Control Block Logic
NUCCN
Hexadecimal
Displacement
5EO
Field
Name
Field Description, Contents, Meaning
OPTFLAGS DC
1X'00'
A*9
in OPTFLAGS
EQO --X i 80i ---EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
~1!:§ g~!!!!gg
NOIMPEX
NOIMPCP
NOSTDSYN
NOABBREV
NOPAGREL
NOREAD
5E1
MISFLAGS DC
No
No
No
No
No
No
A*10
1X'00'
in MISFLAGS
EQU --X'80'---EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
EQU
X'02'
EQU
X' 0 l '
~!!§ g~!!!!gg
KXSWITCH
KOSWITCH
RELPAGES
GRAFDEV
QSWITCH
NODDSK
NEG ITS
ATTNHIT
5E2
MSGFLAGS DC
1X'00'
5E3
A*11
in MSGFLAGS
EQU --X'80'---EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
EQU
X'02'
EQU
X'01'
DBGFLAGS DC
1X'00'
A*12
in DBGFLAGS
EQU --X'80'---EQU
X'40'
5E4
5E6
E""
\O!U
VI"nw
A-'V
EQU
EQU
EQU
EQU
X'10'
X'08'
X'04'
X'02'
DC
EXECFLAG DC
2X'00'
1X'00'
Miscellaneous flags
Message flags
No typing - set by EXEC
No typing - set by HT
No ready message to te typed
No time on ready message
Error code to be typed in red
No error messages to be tYFed
No text on error messages
Linefeed for typewriter CCli
~.!!§ g~!!1!~g
DBGEXEC
DBGPGMCK
DBGEXINT
DBGABN
DBGNSHR
DBGSHR
DBGRECUR
implied EXEC commands
implied CP commands
standard synonyms
command abbreviations
automatic page release
automatic VMj370 console read
Halt execution switch
Halt tracing switch
Release pages switch
Graphics console
Quiet switch for console read
Do not access D-disk
Negative return code from DMSITS
Attention posted
~.!!§ gg!!1!~g
NOTYPOUT
NOTYPING
NORDYMSG
NORDYTIM
REDERRID
NOERRMSG
NOERRTXT
SPECLF
Option flags
DEEUG flags
DEEUG routine executing
DEEUG entered by a program check
entered ""U.l.... an external -;n+crrnr+
...... '-'--- - r DEEUG entered from DMSABN
No shared segment present
Shared segment present
Recursion flag
Tl1:'1Jn~
J.i..a.;. ..... v~
A*13
Reserved for IBM use
EXEC flags
EXEC command running
5E7
PROTFLAG DC
1X'00'
~.!!§ g~!!1!gg
PRFPOFF
PRFTSYS
PRFUSYS
5E8
EQU
EQU
EQU
QI
TSOFLAGS DC
~.!! g~!.!1!gg
TSOATCNL EQU
g~Q!r1!~
TSOFLAGS
X'80'---
Storage protection flags
Storage protection is shut off
System routine in transient area
System routine in user area
X'80'
X'40'
X'20'
1X'00'
!1!
A*14
A*15
TSO flag tyte
Read canceled by attention
Section 2. CMS rata Areas and Control Blocks
215
NUCON
Eexadecimal
Displacement
SE9
Field
Name
Field Description, Contents, Meaning
SUBFLAG
!!J:!§
SEB
SEC
SFO
SF4
SF8
SFC
216
A*16
--X'08'---
X'OO'
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
ASYSNAMS
ACMSSEG
ADMSLIO
VCFSTLKP
VCFSTLKW
DC
DC
DC
DC
DC
DC
SYSREF
AFVS
AOPSECT
ADEVTAB
AFSTLKP
AGETCLK
AFSTLKi
APIE
AIADT
AUSER
ARDTK
ASCANN
ASSTAT
ATABEND
ASUBSECT
AOSMODL
AWRTK
ASTRINIT
IADT
AFREE
AFRET
ADMSPIOC
APGMSECT
AIOSECT
ADMPEXEC
ADIOSECT
AABNSVC
ADMSERL
ADMSCRD
ADMSFREB
ASVCSECT
AADTLKP
AUPUFD
ASTATEXT
AOSRET
ACMSRET
CMS subset flag byte
Subset
Subset
Subset
Subset
X'04'
X'02'
X'01'
A*17
g~!J:.!!~g in DCSSFLAG
DCSSAVAL
DCSSLDED
DCSSCPNV
DCSSLDSD
DCSSVTNA
DCSSVTLD
DCSSOVLP
DCSSJLNS
!Yfley§
600
600
604
608
60C
610
614
618
61C
620
624
628
62C
630
634
638
63C
640
644
648
64C
650
654
658
6SC
660
664
668
66C
670
674
678
67C
680
684
688
EQU
EQU
EQU
EQU
DCSSFLAG DC
!!J:!§
1X'00'
g~!J:.!!~g in SUBFLAG
SUBREJ
SUBRTN
SUBINIT
SUBACT
SEA
DC
--X'80'---X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
X'OO'
V (SYSNAMES)
F'O'
V (DMSLIO)
V (DMSLFS)
V (DMSLFSW)
DCSS indicators
CMSS!G segment exists
CMSS!G loaded
CP or invalid command issued
Loading S-disk
DMSSVT not available
DMSSVT is loaded
virtual machine storage overlaid by ncss
CMSS!G just loaded nonshared
Reserved for IBM use
Address of CMS saved segment
EALR equivalent of FSTLKP
EALR equivalent of FSTLKi
Address Table
-j)s----on---DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
command reject
return
initialization
active
V (FVS)
V (OPSECT)
V (DEVTAB)
V (FSTLKP)
V(DMSINM)
V (FSTLKW)
V (PIE)
V (IADT)
V (USERSECT)
V (D ~SDIOR)
V (D MSSCNN)
A (0)
V (TABEND)
V (SUBSECT)
A (0)
V (D MSDIOW)
V (D MSSTGST)
V (ADTSECT)
V (FREE)
V (FRET)
V (D MSPIOCC)
V (PG MSECT)
V (IOSECT)
V (D~SDBD)
V (DIOSECT)
V(D~SABNUA)
V (DMSERL)
V (DMSCRD)
V (DMSFREB)
V (SVCSECT)
V (ADTLKP)
V (DMSAUDUP)
A (0)
V (OSRET)
V (CMSRET)
IBM VM/370 Data Areas and Control Block Logic
NUCCN
Hexadecimal
Displacement
-----------68C
690
694
698
69C
6AO
6A4
6A8
6AC
6AE
6BO
6B4
6BS
6BC
6CO
6C4
6CS
6CC
6DO
6D4
6DS
6DC
6EO
6E4
6ES
6EC
6FO
6F4
6FS
6FC
700
700
70S
710
714
715
716
.,,,n
Field
Nalle
ASCANO
AEXEC
ASTART
AADTLKW
AUSABRV
AEXTSECT
ASCBPTR
ADMSROS
LDMSROS
CDMSROS
AACTLKP
AACTNXT
AACTFREE
AACTFRET
AADTNXT
ATRKLKP
ATRKLKPX
AQQTRK
AQQTRKX
AERASE
ATYPSRCH
AUPDISK
AKILLEI
ATFINIS
ARDBUF
AWRBUF
AFINIS
ASTATE
ASTATEW
APOINT
BAO
BEO
C20
C60
C62
C64
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
V (DMSSCNO)
V (D MSEXC)
V (DMSLDRA)
V (ADTLKW)
V (USABRV)
V (EXTSECT)
V (SCBPTR)
A(0)
H'O'
H'O'
V (DMSLAF)
V (DMSLAFNX)
V (D MSLAFFE)
V (D MSLAFFT)
V (ADTNXT)
V (DMSTRK)
V (DMSTRKX)
V (DMSTQQ)
V (DMSTQQX)
V (DMSERS)
V (TYPSRCH)
V (DMSAUD)
V (KILLEX)
V (DMSFNST)
V (DMSBRD)
V (DMSBWR)
V (DMSFNS)
V (DMSSTTE)
V (DMSSTTW)
V (POINT)
Ig!:lIi1!§l Buffers
DS----OD
CONCCWS
CONINBLK
CONINBUF
Iii V
7AO
840
840
84S
A60
A60
Field Description, Contents, Meaning
--------------------------------------
CMNDLINE
CMNDLIST
CONSTACK
~§!g
cell
O,O,X!60!,0
CCW
DC
DC
DC
DS
DS
DS
DS
DC
DS
DS
DS
3,0,X'20',1
A (0)
XL1'OA'
AL1(134)
CL134
!!:g!§
n .....
VlJ
CL160
OD
CLS'EXEC'
CLS36
OD
CL320
FREESAVE DS
BALRSAVE DS
WAITSAVE DS
16F
16F
16F
PCTVSAM
H'SO'
1H
1F
DC
DS
DS
Console read and write CCii
NOP to get CE and DE together
50 percent for CMS/VSAM use
Reserved for IBM use
Reserved for IBM use
Section 2. CMS rata Areas and Control Blocks
217
NUCON
Hexadecimal
Displacement
C68
C6C
C70
C74
C78
C7C
Field
Name
ADIKQLAB
NDIKQLAB
ARURTBL
ADMSVIB
AVIPWORK
VSAMFLG1
Field Description, contents,
DC
DC
DC
DC
DC
DC
~.!!§ g~f!Dgg
C7D
C80
C84
C88
C8C
C90
C94
CAO
218
VSAMRUN
VSJOBCAT
VIPINIT
VSIMSERV
VIPSOP
VIPTCLOS
VSAMSOS
EQU
EQU
EQU
EQU
EQU
EQU
EQU
AVSAMSYS
AAMSSYS
AVSREOJ
AVSRWORK
ACBLIST
DS
DC
DC
DC
DC
DC
DS
DS
~eaning
A(X'FFFFFF')
Set to A(IKQLAB) when it is in storage
Set to end of IKQLAB when in stcrage
VSAM resource table address
V(RURTBL)
Address of VSAM interface bootstrap
V(DMSVIB)
A (0)
Address of rMSVIP work area
X'OO'
A*18 VSAM information flag
A (0)
in VSAMFLG1
--X'80'---X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
3X
A (0)
A (0)
V ($$BEOJ4)
A (0)
A (0)
3F
OD
VSAM system loaded
VSAM job catalog active
DMSVIP has teen initialized
CMSAMS system loaded (AMSEBV running)
OS interface SVC 2 call
as TCLOSE call
as AMSERV running
Reserved for IBM use
Address of VSAM saved system
Address of CMSAMS saved system
DMSVSR entry point from VSAM $$EACLOS
Address of rMSVSR work area
ACE list built ty OPEN/CLOSE
Reserved for IBM use
IBM VM/370 Data Areas and Control Block Logic
OPSECT
OPSECT describes the fields used by several programs as parameter lists for reading and
writing on disks and other devices. The OPSECT CSECT is pointed to by the AOPSECT field
in NUCON.
o
CMSOP
8
FILENAME
10
FILETYPE
18
FILE MODE
FILEITEM
FILEBUFF
20
FILEBYTE
28
FILEREAD
SAVER14
30
SAVER15
SAVERO
38
SAVER1
CMSNAME
40
CMSNAME (cant.)
48
CONREAD (cant.)
50
CONRDCNT
A*1
FILEFORM
CONREAD
CONRDBUF
1////////////1//////////////
58
WAITLIST
60
CONWRITE
CONWRBUF
68
70
I A*2
CONWRCNT
WAITLST
78
WAITDEV
REALLST
80
READLST (cant.)
88
90
FILECOUT
RDCCW
RDCOUNT
PUNCHLST (cant.)
98'
AO
PUNCOUNT
RtBUFF
PUNCHLST
PUNEUFF
PRINTLS'I
A8
PRINTLST (cant.)
BO
PRCNT
TAPELIS'I
B8
TAPE LIST (cant.)
TAPEOPER
CO
TAPEOPEB (cant.)
TAPEDEV
C8
A*3
TAPEBUFF
PRBOF
TAPE SIZE
Section 2. CMS Lata Areas and central Blocks
219
OPSECT
I
DO I
TAPECOUT
CLOSIO
1--------·-------------------------------------------CLOSIO (cont.)
CLOSIODV
1---------------------------------------------------EO I
CLOSIODV (cont.)
D81
I
I
E81////////////////////////////I/////////////////////////// •
• ////////////////////////////1/////////////////////////// •
• ////////////////////////////1/////////////////////////// •
• ////////////////////////////1/////////////////////////1/.
I
I
118 I
EXLEVEL
IXF 1
I
I
1
120 I
EXNUM
!XArD
I
I
I
1281////////////////////////////1///////////////////////////1
I
'
130 I
FCBIO
A*4
Hexadecimal
Displacement
Field
Nalle
Pield Description, Contents, Meaning
-----------0
0
8
10
18
1A
1C
20
24
26
28
2C
30
34
38
3C
1ig!.!! UQ
PLIST
CMSOP
FILENAME
FILETYPE
FILEMODE
QE~!~!io!! 1!§!
FILEBUFF
FILEBYTE
PILEPORM
FILECOUT
PILEREAD
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
POINTERS
APST
IOAREl
IOLENGTH
EQU
EQU
EQU
EQU
FILEITEM
OD
CL8
CL8
CL8
Cl2
P
I/O operation command word
Filename
Piletype
Filemode
Itea identification number
Input/output buffer
Data count
File format: fixed/variatle records
Records per block
Read data count
FIlEITEM
PILEBUFF
FIlEBUPF
FIlEBYTE
Euffer area location
Euffer length
H
F
F
Cl2
H
!~~ed!~!~ ~~g!§te! ~~!~ !!~g
SAVER14
SAVER15
SAVERO
SAVER1
DC
DC
DC
DC
P'O'
p'O'·
P'O'
P'O'
Temporary
Temporary
Temporary
Temporary
CMSNAME
DC
CL8'PILE'
Default filename
R14 save
R15 save
RO save
R1 save
~~.!!sol~ f~!g!~!~! 1!§!§
44
DS
~~gg ~21!§Ql~
44
4C
50
51
52
54
58
58
220
CON READ DC
CONRDBUF DC
CONRDCOD DC
DC
CONRDCNT DC
DC
~21!sOl~ !~!!
WAITLIST DS
DC
OF
Cl8'WAITRD'
V (CMNDLINE)
C'U'
A*1
X'O'
AL2 (0)
P'O'
Terminal read
Address of input buffer
Translate code
Data byte count
Reserved for IBM use
List
--OF
Cl8'CONWAIT'
IBM VM/370 Data Areas and Control Block Logic
OPSECT
Hexadecimal
Displacement
60
60
6S
6C
6D
6E
70
70
7S
7C
SO
S4
S4
SC
90
92
94
94
9C
AO
A4
A4
AC
",n
DV
B4
B4
BC
..CS..
",
\".
C9
CC
DO
D4
D4
DC
E4
E8
118
11C
120
124
12S
130
134
Field
Nalle
Field Description, Contents,
j!ite £~1l§£!~
CONiRITE DS
DC
CONiRBUF DC
CONiRCOD DC
DC
CONiRCNT DC
C'B'
X'OO'
AL2 (0)
jail fg!g!~!~!
i1ITLST DS
DC
i1ITDEV DC
DC
DC
List
OF-CLS'WAIT'
CL4'CON1'
F'O'
F'O'
OF
CLS'TYPLIN'
A (0)
A*2
Location of message text
Color code
Length of message text
Address of IMSCiT
Symbolic address of console
Parameter List
--i)s----OF---RE1DLST DC
CLS'CARDRD'
RDBUFF
DC
1 (0)
RDCCi
DC
H'O'
RDCOUNT DC
H'O'
Euffer address
CCi tyte count
Eytes actually read
Card Punch Parameter Li§!
PUNCHLSi-i)s----oP--DC
CLS'CARDPH'
PUIBUPF DC
1(0)
PUNCOUNT DC
1 (0)
Punch buffer address
Punch CCW count
Printer Parameter List
PRINTLST=nS----oP ---DC
CLa'PRINTR'
PRBUF
DC
A (0)
In,
DC
PRCNT
l \ VJ
Printer buffer address
Prillter data count
%s.E~ fg!g!~!~!
TAPELIST DS
DC
TAPEOPER DC
TAPEDEV DC
T1PEM1SK DC
TAPEBUPP DC
TAPESIZE DC
T1PECOUT DC
List
OF-CLS'TAPEIO'
CLS' ,
CL4'TAPP
X'OO'
1*3
AL3 (0)
F'O'
P'O'
Tape operation command
Tape symbolic device
Set mode
Euffer location
Tape counter
Qy! ~~!i£~ ~~.E~nd~!!! 12lls ..§~! on ]ni! !t~.£grd
DS
OP
Operation
DC
CLS'CLOSIO'
CLOSIODV DC
CLS"
Device type
DC
4X 'PF'
Reserved for IBM use
DC
6D' 0'
£!g~
CLOSIO
E!gfsg~
EXLEVEL
EXFl
EXIUM
EXADD
..§to!gg~
!2f
DC
DC
DC
DC
DC
!2!
FCBIO
DC
OSIOTYPE DC
~!~£ ~gg!stfg.E
Egui.E.!~nt
EXEC level
Follows EXEC level
Number of doublewords of free storage
Address of EXECTOR in storage
Reserved for IB~ use
F'O'
P'1'
F'O'
F'O'
2F'0'
Q~
~eaning
Macro Simulation Routines
1(0)- ---------iddress-of last FCB used during I/O
X'DD'
1*4
OS access method type
Section 2. CMS rata 1reas and Control Blocks
221
OSFST
OSFST describes the fields of an OS file status table. When an OS disk is accessed,
DMSROS obtains storage from CMS free storage, builds and fills in an CSFST block, which
is ccmparable to a CMS FST block. This block is released by DMSALU.
o
OSFSTFM
1///////////1
S
OSFSTLRL
10
OSFSTNXT
OSF~~BLK
A*1
OSFSTFVF
1///////1 A*2
1 A*3
OSFSTCER
1S
OSFSTEND
.J
20
OSFSTDSN
4S
50
OSFSTXTN
FO
FS
100
lOS
OSFS~DSK
OSFSTNTE
OSFSTTYP
1////////////////////
------------------------------------------------------1
OSFSTTRK
1///////////////////////////1
------------------------------------------------------1
///////////////////////////1
OSFST!EM
1
110
OSFSTMEM (cont.)
1///////////////////////////1
I
Hexadecimal
Displacement
o
2
4
6
S
C
D
E
Field
Name
OSFSTFM
OSFSTBLK
OSFSTFVF
OSFSTLRL
OSFSTRFM
OSFSTFLG
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
DS
DS
1H
1H
lH
1H
1F
lX
1X
1X
A*1
A*2
!t!!§ gg!!1!gg in OSFSTFLG
OSFSTALT
OSFSTDBK
OSFSTMVL
OSFSTOMV
OSFSTRSW
F
10
14
222
EQO
EQO
EQO
EQO
EQO
OSFSTXNO DS
OSFSTNXT DS
OSFSTCHR DS
--X'80'----
Alternate track indicator
Elock size not specified in DSCE
Multiple volulle data set
Onmoveable data set
Indicates point+1 just issued
X'40'
X'OS'
X'02'
X'01'
lX
1F
5X
Disk lIode
Reserved for IBM use
Elock size
Fixed/variatle flag
Logical record size
as record for.at
Reserved for IBM use
Flag byte
A*3
Number of data extents on disk
Next OS FST
CCHHR of last I/O operation
IBM VM/370 Data Areas and Control Block Logic
OSFST
Hexadeciaal
Displacement
-----------19
1E
4A
Field
Name
OSFSTEND DS
OSFSTDSN DS
OSFSTITN DS
Field Description, Contents, Meaning
-------------------------------------51
44C
1701
Current extent end
Data set name
Data extents description
Bits defined in OSFSTXTN
OSFSTEXii-EQU --OSFSTXTN+30
F4
F6
Fa
FD
100
104
10C
114
118
Location of fourth extent froll DSCB3
OSFSTDSK DS
OSFSTTYP DS
OSFSTNTE DS
DS
OSFSTTRK DS
DS
OSFSTMEM DS
DS
DS
1H
1H
51
3X
1F
2F
CL8
IF
OD
tisk address (Ocuu)
Disk device type (see OSADT fer type flags)
Used to save CCEHR for NeT! macro
Reserved for IBM use
No. of tracks per cylinder
Reserved for IBM use
Partitioned data set mellber name
Reserved for IBf! u.se
OSFSTLTH EQO
(*-OSFST) /8
OS FS'! length in doul:lewords (X'35')
Section 2. CMS Iata Areas and Centrcl Blocks
223
OVSECT, PCTAB
OVSECT is used by Ilodule DMSOVS to provide trace information requested by SVCTRACE.
r---------------------------------------------------------,
OVSGO
AERR
I
r
0 I
I
8 I
-----------------------------------------------------1
AWAIT
LENOVS
I
Eexadecillal
Displacement
Pield
Name
0
4
OVSGO
AERR
AWAIT
LENOVS
-----------8
C
Field Description, Ccntents, Meaning
B
DC
DC
DC
*-*
A(0)
A{OJ
A(0)
Eranch to this point for TRICE
lddress of fMSERR
lddress of CONWAIT
Length of DMSOVS doutlevords
PCTAE is used by DOS/VS routines in the event of a progra. check.
The address of PCTIE
is in bytes X'64' andX'65' of the partition coaaunication region (BGCCI!).
o
Eexadecimal
Displacement
------------
224
PCROUT
Pield
Naae
PCSIVE
Field Description, Contents, Meaning
--------------------------------------
PCTIB
EQU
*-8
Progra. check option table
a
PCROUT
DC
P'O'
PCROUT
4
PCSIVE
DC
P'O'
PCSAV!
IBM VM/370 Data lreas and Control Block Logic
=
=
a when no STIlT .acro vas issued
address of user prograa check
routine (indicat ing that the
STIlT macro vas issued)
co.ple.ent of the address of the
user progra. check rcutine
(indicating that specified routine
in the user STIlT aacro vas
already in use)
a when no S'lilT .acro vas issued
address of user save area
(indicating that the STIlT
macro vas issued)
PDSSECT
PDSSECT describes the fields of the in-storage directory that is used in CS simulation of
BPAM. The in-storage directory is built dynamically ty DMSSVT froll ces free storage.
o
8
Eexadeci!!!al
Displacelient
-----------0
6
8
9
A
C
E
F
10
DIRNAeE
DIRPTR
I
I
---------------------------------------------------1
prSELKSI
CORE SIZE
A*1 I 1*2
A*3 I111111I
Field
iialle
Field Description, Contents, eeaning
DIRNAeE DS
DIRPTR
DS
TEMPBYTE DS
3H
1H
11
NEWBLKS
CORESIZE
PDSBLKSI
CHNGBYTE
11
1H
1H
11
11
OF
PDSDIR
DS
DS
DS
DS
DS
DS
-------------------------------------A*1
A*2
A*3
IUCLIE identifier
Item pointer to start of directory
If byte has dollar sign ($) ,
then prs is in $PDSTEMP file
No. of new tlocks added to FDS by STOW
Size of dictionary in tytes
Elock size of dictionary
Indicates updates to dictionary
Reserved for IBe use
Start of in-storage dictionary
Section 2. ces rata Areas and Control Blocks
225
PGMSECT
PGMSECT describes the fields used by DMSITP for saving registers, old FSW, and other data
for bandling frogram interrupts.
The PGMSECT CSECT is pointed to by the APGMSECT field in NUCON.
I
0
DEBPSW
8
PICADDR
10
OPSW (cont. )
1/////1//////1//////////////1
OPSW
18
Registers
28
TEMPOLD
30
TEMPNEW
38
R13AREA
PSAVE
40
78
80
SCBWORK
SCESAV12
88
SCBSAV13
SCESAV14
90
AUPIE
Hexadecimal
Displacement
o
4
8
8
C
14
28
30
38
3C
7C
SCBPTR
Field
Name
Field Description, Contents, Meaning
~!.Q!gg~
f.Q!
DC
DC
PIE
DS
PICADDR DC
DC
OPSW
DC
*EPlE
DEBPSW
TEMPOLD
TEMPNEW
R13AREA
PSAVE
SCBPTR
DC
DC
DC
DC
DC
~!!§ g§f!ll~g
STAEBIT EQU
STAIBIT EQU
RETRYBIT EQU
80
84
88
8C
90
226
SCBWORK
SCBSAV12
SCBSAV13
SCBSAV14
AUPIE
DC
DC
DC
DC
DS
f!.Qg!~~ !B!~!fYE!
Routine (tMSITP)
F' 0' , V (DMSDBG)
1F
OD
F'O'
2F' 0'
5F' 0'
POint-to aetug
8X'00'
8X'00'
F'O'
16F'0'
F'O'
Work area
Work area
Saved R13
Registers saved at interrupt time
Pointer to first STAE control block
Reserved for IBM use
Program interrupt element
PICA address from recent SFlE
Old PSW after program interrupt
Registers are: R14, R15, RO, R1, and R2
End program interrupt element
in SCBPTR
--X'80'-X'40'
X'20'
A (0)
A(0)
A (0)
A (0)
A
Address
Address
Address
Address
Address
IBM VM/370 Data Areas and Control Block Logic
of
of
of
of
of
work ar ea for STAB exit routine
R12 save area fer DMSSAB
R13 save area for DMSSAB
R14 save area fer DMSSAE
user's PIE, in SPIE exit
PIEAtR
PIBADR contains a save area address and interrupt information.
PIEADB is invoked by the
PIBTAB macro and is often referred to by this macro name. The FIEPT field in the EGCCM
tlock points to the PIETAB CSECT.
r--------------------------------------------------------~
o I A*1
Hexadecimal
Displacement
-----------0
1
2
4
8
D
E
F
o
2
4
PIBSAV2
DS
X
A*1
DS
DS
DS
X
X12
X14
A*2
A*4
I A*5
I A*6
Flags
Cancel code
SYSLOG ID
Address of save area
g~~!1!gg in PIBSAVE
ARFLG
EQU --PIBADR+8
PIBSAV2
PIBPUBAS
PIBLUBID
PIBLUBNO
PIBFLG2
DS
DS
DS
DS
DS
X14
X
X
C
C
ORG PIBADR
XL2
PIBCOMRA DS
SYSLUBX DS
XL2
INTINFO DS
XL4
Save area address
A*3
A*4
A*5
A*6
Address of system save area
PUE assign flags
LUE number of first problem program LUB
Number of LUBs
More flags
PIE extension DSECT
Communications region address
System class LUB address
Interrupt information
g~~!1!gg
SVCIC
8
A*3
Field Description, Contents, Meaning
PIBFLG
PIBCNCL
PIBLOGID
PIBSAVE
J2i!§
C
E
PIESAVE
Field
Name
J2i!§
C
PIBLOGID
A*2 I
I
8 I
PIBECB
PIBPIK
in INTINFO
EQU -INTINFO+3
SVC interruption code
DS
DS
DS
ECE address
Program interrupt key
Reserved for IBM use
XL4
XL2
XL2
Section 2. CMS tata Areas and Control Blocks
227
PIE2TAB
PIB2TAB describes the entries in the PIE2TAE bleck, which is an extension of the PIETAE
tlock. For each PIB table entry, an entry exists in the PIB table extension block
(PIB2TAB) •
The PIB2PTR field in the BGCOM block points to the PIE2iAB tloek.
o
8
Hexadecimal
Displacement
-----------0
2
4
I
PIBCOMR1
SYSLUEX
228
1
---------------------------------------------------------1
PIBECB
PIEPIK
1//////////////1
Field
Name
Field Description, Contents, Meaning
PIBCOMR1 DS
SYSLUBX DS
INTINFO DS
XL2
XL2
XL4
Address of communications region
System LUE index
Used for interruption code
SVCIC
in INTINFO
EQU --INTINFO+3
SVC interrupt code
PIBECB
PIBPIK
DS
DS
DS
Address of termination ECB, if any
program interrupt key
Reserved for IBM use
~:!!§ g~!11!~g
8
C
E
INTINFO
XL4
XL2
XL2
IBM VM/370 Data Areas and Control Block Logic
PUEltB
PUBIDR defines the fields of a physical unit
routines. Both DSECTs define the same storage.
I •
block table
as used
by CMS
and/or DOS
For Use by CMS Routines (MIPPUB macro)
The simulated PUBADR DSECT has eighteen 8-byte entries, one for each device sUPForted by
CMS. The simulated PUBADR DSECT is invoked by the MIPPUB macro.
o
Hexadecimal
Displacement
PUBCUU
1//////1 A*1
I A*2
Field
Name
I •
I A*4
I A*5
Field Description, Contents, Meaning
-----------DS
DS
PUBDSKM DS
PUBDEVT DS
PUBTAPM1 DS
PUBTAPM2 DS
PUBTAP7 DS
0
2
3
4
5
6
7
I A*3
PUBCUU
--------------------------------------
IL2
I
I
I
I
I
I
A*1
A*2
A*3
1*4
1*5
Channel and device number
Reserved for IBM use
Disk mode if assigned DASD
Device type code
CMS tape set mode attributes
DOS tape set mode attributes
7-track indicator
For Use by DOS/VS Routines (PUBTAE macro)
The PUBADR DSECT is invoked
displacement 1'40' of BGCOM.
o
PUBCH!NN
by
the
!/!*1//!
PUETIE
!*2
!*3
macro.
!*4
The
!*5
address of
PUBTIE
is
at
!*6
1*7
Hexadecimal
Displacement
Field
Name
Field Description, Contents, Meaning
-----------0
2
3
4
5
6
7
8
PUBCHANN
PUBCHQPT
PUBERR
PUBDEVTY
PUBOPTN
PUBCSFLG
PUBJCFLG
NEITPUB
DS
DS
DS
DS
DS
DS
DS
DS
I
I
X
PUB WIT
PUBPTR
EQU
EQU
*-PUBADR
NEXTPUB
--------------------------------------
IL2
X
X
X
X
A*1
A*2
A*3
A*4
A*5
A*6
A*7
Channel and device number
Reserved for IBM use
Error retry counter or TEB point
Device type code
Set lIode command or other options
Channel scheduler flags
Job control flags
First byte of next PUB entry
Length of PUB table
Pointer to original PUB
Section 2. CMS tata Areas and Control Blocks
229
PUBOWNER
PUBOWNER contains a 2-byte entry for each entry in the FUB table. For CMS/DOS~ there are
eighteen 2-tyte entries. The address of the PUEOWNER table is in the SYSCO~ block in the
DOSCON CSECT of NUCON.
o
PUBOWNER
20
Hexadecimal
Displacement
o
Field
Na.e
Field Description, Contents, Meaning
PUBOWNER DS
DC
o
OH
18X'0001'
PUB ownership table
PUB owner
PUBOWNER entries have the following meanings:
Value
X'OO'
1
230
1!~g!!!!!g
The physical unit is reserved
X'40'
CMS is vaiting for the volume to be .ounted
X' 0 l'
. Backgrotind partition owns the physical unit
IBM VM/370 Data Areas and Control Block Logic
SSAVE
SSAVE is used by DMSITS to saye the value of the SVC old PSi, the caller's registers, and
other necessary control information required to Frocess the SVC and return to the caller.
Since SVC calls can be nested, several of these save areas can exist at one time. The
system save area is dynamically allocated in protected free storage. SSAVE is invoked
via the CMSIVE macro.
0
A* 1 I 1*2
CODE
CALLER
8
CALLEE
10
OLDPSW
i8
NRIiRET
ERRET
20
EGPRO
EGPR1
28
EGPR2
EGPR3
30
EGPR4
EGPR5
38
EGPR6
EGPR7
40
EGPR8
EGPR9
48
EGPR10
EGPR11
50
EGPR12
EGPR13
58
EGPR14
EGPR15
60
EFPRO
68
EFPR2
70
EFPR4
78
EFPR6
80
CHKWRD 1
SSAVENXT
88
SSAVEPRV
USAVEPTR
90
OSTEMP
98
KEYS (cant. )
XGPRO
10
XGPR1
XGPR15
A8
XCOUNT
CHKiRD2
1*3 I
KEYS
Section 2. CMS Lata Areas and Contrel Blocks
231
SSAVE
Hexadecimal
Displacement
o
Field
Name
OVIND
TYPFLAG
Field Description, Contents,
DS
DS
1!!1~ g~!!n~g
TPFERT
TPFNS
TPFROl
TPFUSR
TPFACB
TPFSV3
TPFSVO
EQU
EQU
EQU
EQU
EQU
EQU
EQU
4
8
10
18
1C
20
20
24
28
2C
30
34
38
3C
40
44
48
4C
50
54
58
5C
60
60
68
70
78
80
84
88
8C
CODE
CALLER
CAL LEE
OLDPSlf
NRftRET
ERRET
EGPRS
EGPRO
EGPRl
EGPR2
EGPR3
EGPR4
EGPR5
EGPR6
EGPR7
EGPR8
EGPR9
EGPR10
EGPR11
EGPR12
EGPR13
EGPR14
EGPR15
EFPRS
EFPRO
EFPR2
EFPR4
EFPR6
CHKlfRD1
SSAVENIT
SS~ VEPRV
USAVEPTR
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DC
DS
DS
DS
90
OSTEftP
DS
2
I
BLl
A*l
A*2
~eaning
Override indicator: 0, 1, 2, and 3
SVC-type flag byte
in TYPFLAG
--1'80'--1'40'
1'20'
1'10'
I'OS'
1'02'
1'01'
H
A
D
D
A
A
OF
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
OD
D
D
D
D
C'ABCD'
A
A
A
F
Error return desired
No save area allocated
Return callee's RO-R1 to caller
User SVC call
OS iSAM SVC request
SVC 203
OS simulation SiC
SVC 203 code value
Address of SVC caller
Name of routine being called
SVC old PSlf of caller
Address for normal return
Address for error return
General-purpose registers at entry to SVC
RO
R1
R2
R3
R4
RS
R6
R7
RS
R9
R10
R11
R12
R13
R14
R1S
Floating-point registers at entry
FPRO
FPR2
FPR4
FPR6
Check word one
Address of next SSAVE area
Address of previous SSAVE area
Address of corresponding user save area - see
USAVE DSECT
Temporary
work area
fer OS
simulation
routines
Maximu. numter of keys in stack
94
95
KEYP
KEYS
1'00'
A*3
(KEYMAI) I
Number of keys in stack
Key stack
Subroutine
XGPRO----ns
IGPR1
DS
IGPR15
DS
ICOUNT
DS
CHKlfRD2 DC
F
F
F
F
C'EFGH'
Extra
Extra
Extra
Extra
Check
SSAVESZ
(*-SSAVE+7)/8
Size of syste. save area in deublewords (1'1S')
11!~
9C
AO
A4
A8
AC
232
DC
DS
1.211.2!!ng
EQU
IBM VM/370 Data Areas and Control Elock Logic
copy
copy
copy
copy
word
of EGPRO
of EGPR1
of EGPR1S
of SVCOUNT
two
SUESECT
SUBSECT defines the fields in the SUBSET work
processing and abend recovery.
area which is used by
C~S
SUBSET cemmand
The SUBSECT block is pointed to by the ASUESECT field in NUCCN.
o
,
RftSGBUF
28
C!!STIft
40
STARS
ASUBRET
50
58
STAESAV
SPIESAV
60
SWTCHSAV
ASUBFST
68
ASUBSTAT
70
ERRNU~
78
TIftBUF
90
Hexadecimal
Displacement
o
28
28
Field
Name
R~SGBUF
CMSTIM
30
34
38
3C
40
40
48
50
54
54
58
5C
60
64
68
70
78
STARS
ASUBRET
STAESAV
SPIESAV
SiTCHSAV
ASUBFST
ASUBSTAT
ERRNUM
TIMBUF
Field Description, Contents,
DS
DS
DC
DS
DS
DS
DS
DS
DC
DC
DC
DS
DS
DS
DS
DS
DS
DS
DS
DS
~eaning
Buffer area for formatting time message
PLIS7 to obtain time fro. D~SIN~
10F
OF
CL8'C~STIME'
F
F
A
F
OF
CL8'*'
CL8'*'
CL2'*'
OF
F
F
F
F
F
F
D
4D
Virtual machine time used
Total processor time used (CF+C~S)
Address of time buffer
~essage length (filled in by C~STI~E)
PLISi for ACTLKP (used by SUESET)
Subset address for storage areas
Return address to caller
STAE save area
SPIE save area
Work area fer error return code
Work area for D~SINH to stcre date and time
Section 2. CMS rata Areas and Contrcl Blecks
233
SVCSECT
SVCSECT describes the fields used by DMSITS in handling SVC interrupts. An SVCSECT block
is built dynamically when an SVC is issued. 1he first SVCSECT is pointed to by the
ASVCSECT field in NUCON; if SVCs are nested, the chain of SVCSECT blocks is processed
using the CURRALOC and LASTALOC fields.
o
JNUMB
JFIRST
8
JF4
JLAST
10
A*1
1//////1
18
LASTALOC
20
ADMSOVS
28
OVAPF
CURRALOC
DEPTH
OVEPF
OVATF
A*2
30
SVCSAVE
18
NRftSAV
OVBTF
1////////////////////
SVCOUNT
158
///////////////////////////1
160
SVCSTOP
SVLAD
168
SVLADW
SVLFS
110
LOADLIST
118
LOADNAftE
180
(Literals are loaded into this area)
188
(The literals here are from the origin)
190
LOADSTRT
198
(Hexadecimals are entered in this area)
1AO
///////////////////////////1/////1///11////////////////
1A8
ftODLIST
1 BO
DUftCOft
1B8
A*3
1CO
ZER03
TRANSRT (cont.)
1C8
1DO
1D8
TRANSRT
A*4
AtTRINS
TEftP02
/////////////////1/////////1//1//////////1/////////////
1----------------------------------------------------1///////////////////////////1//1///1///1/1///1//1///////
I
1 EO I
234
SVCAB
I
RGPRO
IBM VM/310 Data Areas and Control Block Logic
RGPR 1
,I
SVCSECT
1E8
RGPR2
RGPR3
1FO
RGPR4
RGPR5
1F8
RGPR6
RGPR7
200
RGPR8
RGPR9
208
RGPR10
RGPR11
210
RGPR12
RGPR13
218
RGPR14
RGPR15
220
RFPRO
228
RFPR2
230
RFPR4
238
RFPR6
240
NR!!USAV
Hexadecimal
Displacement
o
o
4
8
C
Field
Name
Field Description# Contents, !eaninq
USVCTBL
DS
OF
User SVC tatle
JFIRST
JF4
JLAST
DC
DC
DC
! (*-*)
No. of douhlewords 1D SVC number table
Address of first item (if any] in table
Loop increment for BXLE
Address of last item in table
F'4'
A (*-*)
Bit§ g~f!!!~g in SFLAG
SFSYS
EQU --X'80'SFTRN
EQU
X'40'
SFNue
EQU
X'20'
SFREN
EQU
X'01'
11
12
14
18
1C
20
24
26
28
2A
SVCAB
CURRALOC
LASTALOC
DEPTH
DC
DC
DC
DC
DC
for SVCTRACE
DC --A(O)"----BL2 n on
DC
BL2"on
DC
BL2"on
DC
DC
BL2 n O"
!nf.Qil§!!~.n
ID!!SOVS
OVBPP
OVBTP
OVAPP
OVATP
X'OO'
H'O'
A(0)
A(0)
P'O'
Systell flag -- SVC protect key is zero
Transient area routine -- system mask is off
Nucleus routine -- system .ask is off
Invalid reentry flag
Reserved for IBft use
SVC abend code if any
Current allocated save area
Last allocated save area
Nested SVC depth
Address of I!!SOVS
nBefore print" flags
nBefore type" flags
nAfter print" flags
nAfter type n flags
Section 2. CftS Iata Areas and Control Blocks
235
SVCSECT
Bexadeci.al
Displacement
2C
Field
Na.e
Field Description, Contents, Meaning
OVF 10R
OVF1GB
OVF1GA
OVF1GS
OVF1PA
OVF1F
OVF1FS
EQU
EQU
EOU
EOU
EOU
EOU
EOU
X'SO'
X'40'
X'20'
X'10'
X'OS'
XI 04'
1'01'
Current option is
set on
GPRs before call wanted
GPRs after call wanted
GPRs returned fro. SVC callee
PLIS'I wanted
Floating-point registers wanted
Floating-point registers returned
callee
OVF2ST
OVF2CM
OVF2NR
OVF20S
OVF2WA
EOU
EOU
EOU
EOU
EOU
I'SO'
X'40'
1'20'
X'10'
X'OS'
STOP wanted
CftS SVC TRACE wanted
Nor.al return CMS SVCs wanted
OS SiCs wanted
WAIT CftS SiCs wanted
OVSTAT
DC
B'O'
A*2
!!i!§ g~!i.!!~g in OVSTAT
OVSOR
EOU --X'80'-OVSPREV EOU
X'40'
OVSAFT
EOU
X'20'
OVSBO
X'10'
EOU
OVSSO
X'OS'
EOU
2D
30
7S
236
SVCSAVE
NRMSAV
DC
DC
DC
fro.
Current status of SVCTRACE
Override options are On
SVCTRACE SAME is valid
After bit; set ty DftSITS
BALT override flag
SUSPEND override flag
XL3'0'
1SF'0'
2SD'0'
Reserved for IBM use
INTSVC work area
Bor.al standard information
F'O'
F'O'
F'O'
F
F
F
CLS'LOAD'
CLS'
CLS ') ,
CLS'ORIGIN'
CLS'O'
SX'FF'
2F'0'
Reserved for IBM use
Current SVC count
For tftSITS debugging
Save R14 for DftSLAD
Save R14 for DftSLADW
Save R14 for DftSLFS
15S
15C
160
164
16S
16C
170
17S
1S0
18S
190
19S
1AO
DC
DC
DC
DS
DS
DS
DC
DC
DC
DC
L01DSTRT DC
DC
DC
1AS
1AS
1BO
lBS
1B9
1BC
fLIST !2I ~~lling ~~~1~! (K~~E n~l! !i~ in §!~ict §§gy§~£§)
DS
OF
ftODLIST DC
CL8'LOADftOD' Routine name
DUMCOM
DC
CLS'
Module filename filled in here
SSMOR
DC
X'FF'
A*3 Fence; allows all interrupts
ZER03
DC
AL3(0)
Address is 3-bytes long and set to zeros
TRABSRT DC
CL8'
Bolds filenaae of transient routine
SVCOURT
SVCSTOP
SVLAD
SVLADW
SVLFS
L01DLIST
LOADNAME
Reserved for IBft use
IBM VM/370 Data Areas and Control Block Logic
SVC
SVCSECT
Hexadecimal
Displacement
----------1C4
1C5
1C8
1DO
lEO
1EO
lEO
1E4
1E8
1EC
1FO
1F4
1F8
1FC
200
204
208
20C
210
214
218
21C
220
220
228
230
238
240
Field
Naae
TRANftSK
ADTR1NS
TEftP02
RGPRS
RGPRO
RGPR1
RGPR2
RGPR3
RGPR4
RGPF5
RGPR6
RGPR7
RGPR8
RGPR9
RGPR10
RGPR11
RGPR12
RGPR13
RGPR14
RGPR15
RFPRS
RFPRO
RFPR2
RFPR4
RFPR6
NRftUSA'
Field Description, Contents, eeaning
DC
DC
DC
DC
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
AL1 (X'FF') 1*4
VL3 (TRANSAR)
D'O'
4F'Oi
OD
OF
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
OD
D
D
D
D
12D
-------------------------------------For CVD and other scratch use
Reserved for IBe use
Beturned general-purpose registers
BO
B1
B2
B3
B4
R5
B6
R7
BS
B9
R10
B11
B12
B13
B14
B15
Returned floating-point registers
FPRO
FPR2
FPR4
FPR6
NBftSAV user save area
Section 2. CftS rata Areas and Contrcl Blocks
237
SVEARA
SVEARA describes the fields in a DOS/VS Logical Transient Area (LTA) and problem Program
(PP) save area. SVEARA is invoked via the nOSAVE macro. these areas are used by DOS/VS
routines to save the value of the PSi and registers for purposes such as linkage to and
from transient routines.
,
I
0 1///////////////////////////1///////////////////////////1
8
SVEPSi
SV!PSi2
10
SVER09
SV!ROA
18
SVEROB
SV!ROC
20
SVEROD
SV!ROE
28
SVEROF
SV!ROO
30
SVER01
SV!R02
38
SVER03
SV!R04
40
SVER05
SV!R06
48
SVER07
SV!R08
Hexadecimal
ni"splacement
-----------0
8
C
10
14
18
1C
20
24
28
2C
30
34
38
3C
40
44
48
4C
238
Field
Nalle
SVEPSi
SVEPSi2
SVER09
SVEROA
SVEROB
SVEROC
SVEROD
SVEBOE
SVEROF
SVRROO
SVER01
SVER02
SVER03
SVER04
SVER05
SVER06
SVER07
SVER08
Field Description, Contents, t!eaning
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
2F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
--------------------------------------
Reserved for IBM use
First half PSi
Second half PSi
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area for register
Save area fer register
Save area for register
Save area for register
Save area for register
IBM VM/370 Data Areas and Control Block Logic
9
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
SYSCOM
SYSCOM describes the fields in the SYSCOM block which is the CMS/DOS equivalent ef the
DOS/VS System Communication Region (SYSCOM). The ASYSCOM field in NUCCN Feints to the
SYSCOM block in DMSNUC.
I
0
IJBERBLC
8
IJBERR19
IJEAREX
IJBERR24
IJBFETCH
IJEINTRT
18
IJBEXTRT
IJELTA
20
IJBPPBEG
IJECEINQ
IJBQSIZE
IJBQLNG
IJENPART
IJBRSAVE
IJECCNSP
38
IJBSAB
IJECENTB
1* 1
1*2
A*3
A*4
IJESTID
48
IJBPDADR
IJETKHLD
50
IJBTIMER
IJEAETAB
58
IJBLIK
IJBTIK
IJBTCAVT
IJERFTAB
68
IJBEUECB
IJEOLTEP
70
IJBRASLN
IJETRTAB
78
IJBPBOWN
IJEJATIB
80
IJBPMGR
IJECCWT
88
IJBSAVSD
IJELNSTB
90
IJBAMCOM
IJEAPTA
98
IJBSBLKO
IJESBLKX
1*5
1*6
I 1*7
,
I
I
I
!
IJBEXIT
IJEPWR
60
AO
I
1
1
1/////////////1
30
40
1
IJEPUBRS
10
28
I
I 1*8
A*9
A*10 1/////////////
----------------------------------------------------1
18 ////////////////////////////1///////////////////////////1
-----------------------------------------------------1
BO ////////////////////////////1
IJEMVCAD
I
-----------------------------------------------------1
B8 ////////////////////////////1/////////////1/////////////1
I
COl
I
C81
IJBMFCER
A*11 I
IJEPUBLN
IJBAPNO
I
I
I
I
Section 2. CMS Iata Areas and Control Blocks
239
SYSCO!!
DO
IJBSEGT
IJBPFT
D8
IJBPFTX
IJBBOX
EO
IJBDPDTB
111111I111111I11111111111111
E8
IJBVIRAD
IJBEOR
FO
IJBFTTAB
IJBSVA
F8
IJBSVIS
IIIIIIIIIIIARPSLIIIIII/IIIII
100
-------------------------------------------------------1
1111////IARPSRIIIIIII///IIIII
IJEDLAB
I
1----------------------------------------------------1
1081
SYS$CODE
I
I
1101
Hexadecimal
Displacement
a
4
8
A
C
10
14
18
1C
20
24
28
2A
2C
2E
30
34
38
3C
40
41
42
43
44
46
48
4C
240
Field
Name
IJBERBLC
IJBAREX
IJBERR19
IJBERR24
IJBPOBRS
IJBFETCH
IJBINTRT
IJ13 E_XTRT
IJBLTA
IJBPPBEG
Field Description, Contents, Meaning
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
Address of error block
Exit address for attention
Cancel exit for attention
Cancel exit for attention
SYSRES POE address
Address of fetch routine
Address of 1/0 interrupt routine
Address of external interrupt rcutine
P()inter to logical ttansientarea
Pointer to problem program area
A (0)
A (0)
H'O'
H'O'
F'O'
A (0)
A (0)
A(O)
i(O)
A (0)
IJBFLPTR EQU
*
Free list pointer
IJBCH.1NQ
IJBQSIZE
IJBQLNG
IJBNP.1RT
F'O'
H'O'
H'O'
H'1'
B'O'
Pointer to channel queue
Number of channel queue entries
Length of one error queue entry
Number of partitions
Reserved for IBM use
Pointer to channel buckets
Address of CRT table
Address of SAB table
Address of channel control table
Flags and switches
Switch byte
Flags and switches
Flags and switches
System task selection control field
IJBRS.1VE
IJBCONSP
IJBS.1B
IJBCHNTB
IJBFLG01
IJBFLG02
IJBFLG03
IJBFLG04
IJBSTID
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
A (0)
A (0)
A (0)
A (0)
X'OO'
X'OO'
X'OO'
X'OO'
B'O'
A*1
A*2
.1*3
A*4
IJBSELCT EQU
*-1
System task selection byte
IJBEXIT DC
IJBPDADR DC
B'O'
A (0)
Pointer to task selection
Pointer to PDAREA
IJBTHPTR EQU
*-1
Track hold ELPTR
IJBTKHLD DC
Address of track hold tatle
IBM VM/370 Data Areas and Control Elock Logic
SYSCOM
Hexadecimal
Displacement
50
54
58
SA
5C
60
64
68
6C
70
74
78
7C
80
84
88
8C
90
94
98
9C
AO
A1
A2
A3
A4
AS
A6
BO
B4
B8
BC
BE
CO
CB
CC
CE
DO
D4
DS
DC
EO
E4
E8
EC
PO
P4
F8
PC
100
104
108
Field
Name
IJBTIl!ER
IJBABTAB
IJBLIK
IJBTIK
IJBPlfR
IJBTCAVT
IJBRPTAB
IJBEUECB
IJBOLTEP
IJBRASLN
IJBTRTAB
IJBPBOlfN
IJBJATAB
IJBPl!GR
IJBCClfT
IJBSAVSD
IJBLNSTB
IJBAl!COM
IJBAPTA
IJBSBLKO
IJBSBLKX
IJBSYSPT
IJBRASPT
IJBPl!RPT
IJBSUPPT
IJBCRTPT
IJBERPPT
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
IJBMVCAD DC
DC
DC
DC
IJBMFCER DS
IJBNERQ DC
IJBPUBLN DC
IJBAPNO DC
IJBSEGT DC
IJBPFT
DC
IJBPFTX
IJBBOX
DC
IJBDPDTB DC
DC
IJBVIRAD DC
IJBEOR
DC
IJBPTTAB DC
IJBSVA
DC
IJBSVIS DC
ARPSL
DC
ARPSR
DC
IJBDLAB DC
SYS$CODE DC
Pield Description, Contents, Meaning
Address of timer request table
Address of AB option table
Key of task owning the LTA
H'O'
Task interrupt key
X'0010'
Pointer to Fower table
A (0)
Space for VTAl! address
A (0)
Pointer to RF table
A (0)
Pointer to EU and ECB table
A (0)
Address of OLTEP bucket
A (0)
Pointer to BAS linkage area
A (0)
Address of ASCII table
A (0)
Address of PUB ownership table
A (0)
Address of job accounting commen area
A (0)
Base address of programmer routines
A (0)
Address of celf transient werk area
A CO)
Pointer to SDAID common area
A (0)
Address of line mode table
A (0)
Address of VSAM common register
A (0)
Address of PTA
A (0)
Pointer to first system task block
A (0)
Pointer to current system task
P'O'
X'OO'
A*5 For alignment
AL 1 (0)
A*6 Pointer to BAS task block
AL 1 (0)
A*7 Pointer for PMGR task block
A11 (0)
A*8 Pointer to SPVR task block
AL 1 (0)
A*9 Pointer to CRT task block
AL 1 (0)
A*10 Pointer to ERP task block
Reserved for IBl! use
10X'00'
Reserved for IBM use
P'O'
Pointer to MVCFLD
A (0)
Reserved for IBM use
P'O'
Beserved for IBM use
H'O'
Reserved for IBM use
H'O'
Information on !FC! and !FCU ERP
11X'00'
AL 1 (0)
A*11 Number of error queue entries
Length of PUB table
S (0)
Number of active partitions
H'1'
Address of segment table
A (0)
Address of page frame table
A (0)
.. In,
Pointer to page fra:e table extension
A \ VI
Pointer to boundary box
A (0)
Pointer to rPD table
A (0)
Reserved for IBM use
P'O'
Address of VIRTAD routine
A (0)
End of real storage
P'O'
Address of the fetch table
A (0)
Address of the SVA start
A (0)
Address of SVA GETVIS area
A (0)
Reserved for IBM use
A (0)
Reserved for IBl! use
A (0)
Pointer to system code name
A(SYS$CODE)
CL13'CMS/VSAM' System code name
A (0)
A CO)
Section 2. CMS rata Areas and Control Blocks
241
SYSNAMES
SYSNAMES defines the names of any saved systems which may te loaded by CMS routines.
SYSNAMES describes the entries in the SYSNAftES table which is pointed to by the ASYSNAMES
field in NUCON.
242
S
CftSVSAM
CMSAftS
1S
CliSDOS
-----------0
CMSSEG
10
Hexadecimal
Displacement
S
10
1S
20
o
Field
Name
Field Description, Contents, Meaning
CMSSEG
CMSVSAM
CMSAMS
CMSDOS
SYSNEND
DC
DC
DC
DC
DS
CLS'CMSSEG'
CLS'CMSVSAM'
CL8'CMSAMS'
CLS'CMSDOS'
OD
CftS shared system name
VSAM shared system name
Access Method Services shared system name
tos shared system name
SYSNCNT
EQU
(SYSNEND-SYSNAMES)/€ Size in doublewords (X'04')
IBM VM/370 Data Areas and Control Block Logic
TSOBLKS
TSOBLKS DSECi describes the entries in the T~OBLKS block which centains OS centrel
information used by CMS, that is, the co.mand program parameters list (CPPL), user
profile table
(UPT), protected step control block (PSCB), and the environment centrel
table (ECT). The ITSOCPPL field in NUCON points to TSOELKS block.
I
I
0 I
CPPLOBUF
I
8 I
CPPLPSCB
I
10 I11111111111111
I
18 I
UPTUSER (cont.)
I
20 I
I
28 I
I
30 I1111 1*5 11111
A*6
CPPLUPT
CPPLECT
UPTUSEB
I 1*1
I 1*3
1//11111
I A*4
PSCBGPNM
PSCBTCOL
50
PSCBBLGB
58
PSCBUPTL
PSCBUPT
PSCBRSZ
11/1111111111
60
PSCBU
ECTBTCD
A*7
"7In
IV
ECTIOWA
ECTSMSG
EC'IPC!!D
78
ECTPCMD (cont.)
80
ECTSCMD (cont.)
ECTSCMD
A*9
ECTDDNUM
ECTUSER
88
Hexadecimal
Displacement
1*2
PSCEUSEB
48
68
I
I
I
I
I
I
Field
Name
Field Description, Contents, Meaning
-----------0
0
4
8
C
10
10
12
1C
CPPL
CPPLOBUF
CPPLUPT
CPPLPSCB
CPPLECT
DS
DC
DC
DC
DC
OF
lL4 (0)
lL4 (UPT)
AL4 (PSCB)
AL4 (ECT)
Q§g ~!2!!1~ Table
UPT
UPTUSEB
UPTSWS
!!!!§
(Qg~)
DS ---OF
DS
CL2
DS
CL10
DC
X'OO'
I!~!!!!~g in UPTSWS
UPTNPRM
UPTMID
UPTNCOM
Temporary PLIST to CP programs
Address of command line
Address of dummy UPT
Address of dummy PSCB
Address of dummy ECT
EQU --X'80'-EQU
X'40'
EQU
X'20'
EQU
1'10'
1*1
Reserved for IBM use
Reserved for installation use
User's environment switch
Beserved for IBM use
No prompting is to be done
Print message identifiers
No user communication allowed via SEND
Section 2. CMS tata Areas and Contrel Blocks
243
TSOBLKS
Hexadecimal
Displacement
Field
Name
Field Description, Contents, !eaning
~~!§ ~§!!~§g
lD
lE
IF
20
20
27
28
30
32
33
34
4C
50
54
58
SA
5C
60
68
68
69
6C
70
71
74
7C
84
UPTPAUS
UPTALD
EOU
EOU
UPTCDEL
UPTDEL
DC
DC
DS
~!,gte£!§g
PSCB
PSCBUSER
PSCBUSRL
PSCBGPN!
PSCBATR1
!! Y~12!2(cont.)
X'08'
Pause for "1" when in noninterface mode
X'04'
ATTN has ~een specified as line delete
X'OO'
X'OO'
CLl
A*2
A*3
2!§R Control
OF-----
DS
DC
DC
DS
DS
CL7' ,
X'OO'
CL8
X
ORG
PSCBCTRL EOU
PSCBACCT EOU
PSCBJCL EOU
PSCBATR1
X'80'
X'40'
X'20'
DS
PSCBATR2 DS
DS
DC
X
X
X
6F'0'
PSCBTCOL
PSCBRLGB
PSCBUPT
PSCBUPTL
1F
lL4 (0)
lL4 (UPT)
AL~ (16)
BL.16
A
CL8
PSCBRSZ
PSCBU
DS
DS
DC
DC
DS
DS
DS
~llir~.D!~.n!
ECT
ECTRCDF
ECTRTCD
ECTIOWA
ECT!SGF
DS
DC
DC
DC
DC
ECTS!SG
ECTPCftD
ECTSCftD
ECTSWS
DS
DC
DS
DC
Control
---OP--
!,gtel
244
A*5
(~SC])
User ID padded
Length of user
Esoteric group
16-bit string
reserved for
with ~lanks
ID
name initialized by legon
of user attributes; bits 3-15
IB! use
Operator command user
Account command user
Submit co.mand user
Reserved for IB! use
16-bit string reserved for installation use
Six fullwords
used
initialized to 0
for
TSC
accounting;
Pointer to the user profile table
Length of the user profile.table
Reserved for IB! use
Region size requested in 2K units
Reserved for installation use
I§R!~
AL 1 (0)
AL3 (0)
AL4 (0)
X'OO'
AL3
CL8' ,
CL8
X'OO'
ECTNOPD
in ECTSWS
EOU --X'80'--
ECTATRft
*
ECTLOGF
ECTNMAL
ECTNNOT
EOU
EOU
EOU
EOU
EOU
ECTDDNUft DC
ECTUSER DS
DS
A*4
A*6
~i!§ g§!!~~g
85
88
8C
~!~!
Character delete character
Line delete character
Reserved for IB! use
A*1
A*8
A*9
High-order tit indicates CF abended
Return code from last control routine
Address of I/O service routine werk area
High-order tit means delete secend level
messages (!ust be initialized by user at
start of user's program)
Address of second level message chain
primary command name
Subcommand name
lCT switch
X'20'
X'40'
X'10'
X'08'
X'04'
If 0 bit is on, no operands exist in command
buffer
CP terminated by T!P DETACH with STAE
Reserved for IB! use
Logon/off requested T!P to log eff
No user messages received at logon
No broadcast notices to ~e received
AL3 (0)
A
A
Counter for generated temperary DDIA!S
Reserved for installation use
Reserved for IB! use
For terminal attention exit element (TAXE), see the CftSTAXE DSECT.
IBM VM/310 Data Areas and Control Block Logic
USAVE/, USERSECT
USAiE is used by DKSITS to allocate and free save areas for other routines during SVC
processing; it is pointed to by the USAVEPTR field in SSAiE.
USAVE is invoked via the
SiCSAiE macro.
I
01
581
Hexadecimal
Displacement
Field
Naae
o
Field Description, Contents, Beaning
DS
12D
Scratch area passed to user
via a pcinter in
R13
USAVESZ EQU
(*-USAiE) /8
Size cf user save area in dcublewords (X'OC')
USERSECT describes the USER SECT block which is a general scratch storage
for user-defined purposes ..,
It may be redefined to suit installation
USERSECT is pcinted to by the AUSER field in NUCON.
o
area provided
requirements.
r
I
USCRTCH
40
Hexadecimal
Displacement
o
Field
Naae
USCRTCH
Field Description, Contents, eeaning
DC
18F'0'
User scratch area; lIay te redefined per
installation requirements
Section 2.
ces
tata Areas and Contrcl Blocks
245
246
IBM VM/370 Data Areas and Control Block Logic
Section 3.
RSCS Data Areas and Control Blocks
Tbis section describes in detail each of the data areas used by RSCS. Unlike the CP and
C!S format tlocks in this publication, the RSCS format tlocks are on fullword boundaries.
This sectien of the publication contains only
other contrel areas used by RSCS.
~SECTs.
Appendixes
E and
C contain
Section 3. RSCS tata Areas and Contrel Blocks
247
ASYNE
ASYNE defines symbolic addresses for elements on an asynchronous exit queue. An
asynchronous exit queue element contains information ty which a task requests that it
handle asynchroncus interrupts.
IOEXITQ, EXTQ, and ALERTQ in SVECTORS are the heads cf three asynchroncus exit queues.
Each of these queues is comprised of supervisor elements defined by the ASYNE DSECT.
IOEXITQ points to requests fer I/O exits, EXTC points to requests for external exit
requests, and ALERTQ points to requests for ALER7 exits.
0
4
ASYlfTASK
8
ASYNEXIT
C
Hexadecimal
Displacement
------------
248
ASYlfCODE
Field
lfa.e
0
ASYlflfEXT DS 1F
4
ASYlfTASK DS 1F
8
ASYNEXIT DS 1F
C
ASYNCODE DS AL2
E
ASYNSPAR DS 1X
ASYlfID
DS 1X
F
,
ASYNNEXT
I//ASYNSPAR///I
I
I
,
I
,
I
ASYlfID
I
Field Description, Contents, I!eaning
-------------------------------------Address of the next asynchronous
interrupt exit request element
Address of task elellent describing
the task that requested the
asynchron-ous interrupt
Address of the requested asynchrcnous exit
routine
Address of the device for which
asynchronous I/O interrupts are
requested or interrupt bit code
Reserved for IBM use
1-byte identification of the task owning the
asynchronous exit routine
IBM VM/370 Data Areas and Control Block Logic
BUFDSECT
BOFDSECT is used to transmit buffer
programmable remote stations.
control information
and tuffer
The buffer sent across the TP line starts at EUFSTARTi the first
are used by the DMTSML line driver but are not transmitted.
data to
and frem
7 bytes of BUFDSECT
$BUFPOOL in DMTSML points to a queue of available TP buffers; $INBOF in module DMTSML
peints to a queue of TP buffers that have been received from a remote station and are
waiting to be deblocked. $OUTBUF in DMTSML points to a queue of TP buffers that are
ready for transmission to remote stations.
o
r---------------------------------------------------------,
BUFCBAIN
BUFCOUNT
4
8
BUFSTAT
BUFSTART
BUFBCB
o
o
4
6
Field
Name
BUFBEGIN
BOFCHAIN
BUFCOUNT
BUFSTAT
Field Descriptien, Contents, Meaning
DS
DC
DS
DS
OF
A (0)
1H
1C
~.!!§ g~!.!.n~g in BUFSTAT
7
9
A
C
EOFFCS
BUFDATA
C
Hexadecimal
Displacement
BUFSTART
Beginning of the buffer
Buffer chain field
count of bytes to transEit
Buffer status byte
BUFFAKE
BUFRESP
BUFNAK
BUFTEXT
BUFOCHEK
EQU
EQU
EQU
BQU
EQU
i'01'----X'02'
X'08'
X'10'
Dummy buffer indicator
Response only in buffer
NlK response being sent
Buffer contains text information
Unit check expected
BUFSTART
BUFBCB
BUFFCS
BUFDATA
DS
DS
DS
DS
CL2
1C
CL2
OF
Bisynchronous transmission control bytes
Block control byte
Function control sequence
Data portion of TP buffer
v,nll'
A · V ....
Section 3. RSCS tata Areas and Contrel Blocks
249
COMDSECT
COMDSECT defines address constants used as pointers to subroutines co.mon to all RSCS
modules. These subroutines are contained in module DMTCOM. COMDSECT is Fointed to by
TCOM in SVECTORS.
,
0
GLINKREQ
4
GPAGEREQ
8
FPAGEREQ
C
PMSGREQ
10
GMSGREQ
14
GTODEBCD
Hexadecimal
Displacement
o
4
8
C
10
14
250
Field
Na.e
GLINKREQ
GPAGEREQ
FPAGEREQ
PMSGREQ
GMSGREQ
GTODEBCD
Field Description, Contents, Meaning
DS
DS
DS
DS
DS
DS
1A
1A
1A
1A
1A
1A
Get link tatle entry routine
Get Fage of main storage
Free page of main storage
Put .essage element into message stack
Re.ove message ele.ent fro. .essage stack
convert S/370 TOD to EBCDIC
IBM VM/370 Data Areas and Control Block Logic
DEVT1ELE
DEVT1BLE defines virtual device information for an I/O operation.
to the IOTAELE DSECT.
o
DEVLOCK
, DEVSNREQ
DEVADDR
4
8
DEVSTART
C
DEVCSW
14
This DSECT corresponds
DEVSENSE
DEVTYPE
rEVFLAGS
DEVNll!E
18
1C
Hexadecillial
Displacement
-----------0
4
6
7
0
v
C
C
14
15
18
Field
Name
Field Description, Contents, !!eaning
-------------------------------------DEVLOCK
DEVADDR
DEVSNREQ
DEVTYPE
DEVSTART
DC
DC
DC
DC
DC
F'O'
lL2 (0)
AL 1 (0)
X'OO'
F'O'
DEVSIOCC
DEVCSW
DEVSENSE
DEVFLAGS
DEVNAME
DC
DC
DC
DC
DC
OX'OO'
2F'0'
X'OO'
31'00',
CL8'
I/O request synch lock
CUU address of I/O device
Requested sense bytes
Vl!/310 device type code
Address start channel program
for I/O handling
Right-justified SIC condition code
Ending CSW from last I/O oFeraticn
Sense information on unit check
Device status flags
EEerle device address and name
Section 3. RSCS rata Areas and Control Blocks
251
FREEE
FREEE defines an element in the chain of elements that comprise the free element queue.
FREEQ in SVECTORS
the FREEE DSECT.
points to the chain of
free elements, each of which
is defined by
,
0
FREENEXT
4
FREESPAR
I
I
I
8
FREEID
C
,
,
I
I
L
Hexadecillal
Displacement
-----------0
"F
252
Field
Name
Field Description, Contents, eeaning
FREENEXT DS 1F
FREESPAR DS CL11
FREEID
DS 1X
Address of next element in free queue
Spare field
Standard taskid displacement, which is:
ID=X'OO'=> free element
lBe VM/310 Data Areas and Control Block Logic
GIVE/TAKE
§lVE
~~2Q~E1 1!~1]
The format of a GIVE Request Table is:
,
I
Synch Lock
0
I
4
Task name or A(GIVE Element)
8
A (GIVE Request Buffer)
C
A (GIVE Response Buffer)
I
I
I
I
I
.J
When a task requests the services of another task via a GIVE request, the second field of
the table above contains the task name of the task to which the task is to be sent. When
DMTGIV builds a GIVE element for the request, it overlays this task name with the address
of the GIVE element.
The task Ferfor.ing the requested service builds a
table, which corresponds to the GIVE request table.
table called
the TAKE
request
GIVEE defines symbolic addresses for items used in processing a GIVE request.
GIVEQ in SVECTORS
cOiimunicaticns.
points
to
the queue
of
GIVE
elements
used
in
task-to-task
The GIVEADDR field of this DSECT is the address of a GIVE request table, which, in
turn, contains addresses of buffers for elements describing requests and resFonses to
requests. These tables are described below; the elements that fill the buffers are
described in "AFpendix C: RSCS Request Elements."
,
I
GIVENEXT
0 I
I
4 I
I
8 I
I
GIVEADDR
GIVENAME
C I/////////GIVESPAR/////////I
Hexadecimal
Displacellent
------------
Field
Name
1F
1F
C
E
GIVENAME DS
GIVESPAR DS
GIVENID DS
CL4
AL2
1X
F
GIVERID
1X
8
GIVENID
GIVERID
I
I
Field Description, Contents, Meaning
GIVENEXT DS
GIVEADDR DS
0
4
I
I
I
I
I
DS
Address of next GIVE element
Address of GIVE request table in sending
task's storage
Task name of receiving task
Reserved for IBM use
1-byte identification of receiving task after
the TAKE request has been processed
1-byte identification of sending task
Section 3. RSCS rata Areas and Contrcl Blocks
253
IOE
IOE defines symbolic addresses
operation requested by a task.
of elements and other information associated
MPIIOQ and SELIOQ in SVECTORS point to queues
selector channels, respectively.
The IOTABLEA field points to the address of
described in this secticn.
o
lONEIT
4
IOSUBQ
lOADDR
C
Hexadecimal
Displacement
------------
an I/O table defined by IeTAELE, which is
Field
Name
IOSECHAN
IOID
Field Description, Contents, Meaning
4
IONEIT
IOSOBQ
DS
DS
1F
1F
Address of next active I/O element
Address of first inactive I/e element for a
given subchannel
8
IOSTIT
EQU
*
Statu~ ~lags
0
Bits defined in IOSTAT
SENSING---EQO-X'80'--CHANDONE
EQU X'40'
C
IOTABLEA
IOADDR
DS
DS
1F
AL2
E
F
IOSBCHAN
IOID
DS
DS
1X
1X
8
254
of I/C elements for the multiplexer and
IOTAELEA
IOSTAT
8
with an I/O
for current IIC operation
(first tyte of IOTABLEA)
Flag set to 1 while automatic sense is
active
Flag set to 1 when subchannel terminates
Address of I/O request table in task storage
Address (cuu) of the device requesting
current I/O operation
Subchannel address; 1-byte; assigned by MSUP
ID of task associated with this I/O cperation
is 1-byte and assigned by MSOP
IBM VM/370 Data Areas and Control Block Logic
ICTAELE
IOTABLE defines symbolic addresses for items used in processing an I/C interrupt request.
The first five fields are filled in by the task to convey information about the I/O
request to the supervisor. The last three fields are filled in ty the supervisor to
convey status infor.ation about the I/O operation to the task.
o
IOSYNCH
DEVCUU
4
DEVCODE
PROGADDR
8
c
SENSREQ
SIOCODE
10
ENDSENSE
14
Hexadecimal
Displacement
------------
Field
Name
Field Description, contents, fteaning
0
4
IOSYNCH
DEVCUU
DS
DS
1F
AL2
6
7
SENSREQ
DEVCODE
DS
DS
AL1
AL1
8
PROGADDR DS
1F
Synchronization lock for I/O operation
Address (cuu) of device associated
with this I/O operation
Numter of sense bytes requested on unit check
1-byte Vft/370 device type code
(not used by I/O manager)
Address of channel program for the
l/C operation
1-byte SIO condition code
return information
c
D
14
SIOCODE
ENDCSi
DS
END SENSE DS
2F
AL1
SIO condition code
Ending CSi with composite status
return information
Requested return sense informaticn
on unit check CSi status
~i!§ g~!iD~g
TYPPUN
TYPPRT
in ENDSENSE
EQU 1'80'-----EQU X'40'
V~/370 type code for the punch
V8/370 type code for the printer
Section 3. RSCS Iata Areas and ContrGl Blocks
255
LIRKTABL
LINKTABL describes the status of a single link in the RSCS network; collectively, all the
links defined for the system are referred to as the link tatle.
An a-byte header precedes the first entry in the link table (that is, the first link
defined by the LINKTABL DSECT). The TLINKS field in SVECTORS points to this header,
which has the following format:
o
4
total links
6
current
links
max ilium
links
total links
is the total number of links defined for an RSCS installation via the
GENLINK macro during system generation.
(For information cn the GENLINK
macro, see the !~LJ1Q ~I2!~! gIQg!g~~!~2 Gu~de.)
maximum links
is the maximum number of concurrently active links allowable.
current links
is the number of links active in RSCS at a given time.
I
o 1
LINKID
I
4 1
1-----------------------------------------------------LDEFTNME
1-----------------------------------------------------C 1
8 I
tlC~T~ME
10
LDEFDRVR
14
LACTDRVR
18
1C
20
LACTLINE
LDEFLINE
24
LDRVRVAR
28
LDEFCLS1
LDEFCLS2
LDEFCLS3
LDEFCLS4
2C
LACTCLS1
LACTCLS2
LACTCLS3
LACTCLS4
30
LTIMEZON
LFLAG
34
LRESERVD
LPENDING
LTAKEN
38
LPOINTER
3C
LMSGQ
40
LTRNSCNT
44
LTOCNT
48
LERRCNT
LSPARE
LNKCLOCK
4C
256
IBM VM/370 Data Areas and Control Block Logic
LINKTAEL
Hexadecimal
Displacement
o
8
C
10
18
20
22
24
28
29
2A
2B
2C
2D
2E
2F
30
31
Field
Name
LIN KID
LDEFTNME
LACTTN!'lE
LDEFDRVR
LACTDRVR
LDEFLINE
LACTLINE
LDRVRVAR
LDEFCLSl
LDEFCLS2
LDEFCLS3
LDEFCLS4
LACTCLSl
LACTCLS2
Field Description, Contents,
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
CL8
CL4
CL4
CLa
CL8
2X
2X
1F
CLl
CL1
CLl
CLl
CLl
CLl
LACTCLS3 DS
CL1
LACTCLS4 DS
LTIMEZON DS
eLi
1X
LFLAG
1X
DS
~eaning
EECtlC link identification
Default task name
Active task name
Default driver identification
Active driver identificaticn
Default virtual line address
Active virtual line address
Line driver variable information
Default spool file Class 1
Default spool file Class 2
Default spool file Class 3
Default spool file Class 4
Active spool file Class 1
Active spool file Class 2
Active spool file Class 3
Active spool file Class 4
Displacement of two complete time zones from
Greenwich Mean Tille
Link flag byte
1}it§ g~!.!l!.~g in LFLAG
'80'--LACTIVE EQU
LALERT
EQU X'40'
LHOLD
EQU X'20'
LDRAIN
EQU X'10'
LTRALL
BQU X'08'
LTRBRR
BQU X'04'
LHALT
EQU 1'01'
Link active
AXS ALERT exit set
Link hold set
Link drain in progress
Link transaction tracing (all)
Link transaction tracing (error)
Link to be forced inactive
LINKLEN
BQU
Length of link table entry
32
34
36
38
LRBSBRVD
LPENDING
LTAKEN
LPOINTER
DS
DS
DS
DS
1H
1H
1H
1F
3C
LMSGQ
LTRNSCNT
LERRCNT
LTOCNT
LSPARE
LNKCLOCK
DS
DS
DS
DS
DS
DS
1F
1H
1H
1H
1H
8X
-x
40
42
44
46
48
*-LINKTABL
Count of tag elements reserved
Count of unaccepted tags
Count of tag slots in use
Address of start of the TAG queue for this
RSCS link
MSG queue pointer
Link transaction count
Error count
Timeout count
Spare half word
Clock comparator value for this link
Section 3. RSCS tata Areas and Control Blocks
257
REQBLOCK
REQBLOCK defines
line driver.
data and information
for a request for
file processing by
The first four fields of this DSECT form a GIVE request table,
"GIVEE: A GIVE Element", in this section.
the DMTMFT
which is described in
The next seven fields of this DSECT for a GIVE request tuffer in the format of a File
Request Element, which is described in "Appendix C: RSCS Request Elements."
0
---------------------------------------------------------,
RDEVSYNC
4
RDEVREQN
8
RDEVREQ
C
RDEVRESP
10
RDEVRLEN
RDEVFUN
I///RDEVRESV///I
14
RDEVTAG
18
RDEVFIOA
1C
20
RDEVLINK
24
RDEVSOPT
RDEVNAME
f
28
RDEVSTYL
2C
RDEVFLAGS
Hexadecimal
Displacement
o
4
8
C
10
11
12
13
14
18
1C
24
27
2C
258
Field
Name
Field Description, Contents, Meaning
Hexadecimal Locations 0 !hfQygh X ~Q~f!2§ lA~ !~1 GI!~ ~~gy~2! !~~1~
RDEVSYNC--DC--P'O'--- Synchronous lock
RDEVREQN DC CL4'AXS'
File access task
RDEVREQ
DC A(O)
Request buffer address
RDEVRESP DC AL1(0),AL3(0)
Response buffer address
Hexadecimal Locations 0 !h!QygA j1 ~Q!E!!§~ 1~~ ]~1 §1!~ ]~g~21 ~yff~!
in-the-Pormat-of-i-Pile ]~gy~21 !l~ID~nl (~2 2~Q!~ l~ !EE§~~l! ~)
RDEVRLEi--DC- 1L1(O,--Request length
RDEVFUN
DC AL1(0)
Request function
RDEVRESV DC lL1(0)
Reserved for IBM use
RDEVSOPT DC lLl(O)
Subordinate option byte
RDEVTIG
DC A(O)
Tag address
RDEVFIOA DC A(O)
File I/O area address
RDEVLINK DC CL8' ,
Link name
RDEVNAME DC C'
Device name
RDEVSTYL DC C'
Device style
RDEVFLAGS DC lL1(O,O,O,O)
Device flags
IBM VMj370 Data Areas and Centrol Block Logic
ROUTE
o
ROUTDEST
ROUTHEXT
8
~------------------------------------------------------~
Hexadecimal
Displacellent
-----------0
a
Field
Nalle
Field Description, Contents, !eaning
ROUTDEST
ROUTNEXT
DS
DS
CLa
CLa
ROUTSIZE
EQU *-ROUTDEST
Final destination ID
LINKID for indirect routing
Length of a routing tatle entry
Section 3. RSCS Iata Areas and Control Blocks
259
SVECTORS
SVECTORS defines low storage for the RSCS
storage: machine-defined and RSCS-defined.
•
virtual aachine..
It
includes two
types of
MACHINE-DEFINED LOW STORAGE
The SVECTORS aachine-defined low storage defines machine status data
program execution and required by System/370 architecture.
0
4
,
r
IPLPSW
I
40
44
CSW
50
TIflJER
1
1
1
48
CIW
1
I
I
4C 1////1////////////////////////////////1
8
C
IPLCCW 1
10
14
IPLCCW2
18
1C
OLDEXT
54
OLDSVC
58
5C
BEWEXT
20
24
OLDPROG
6C
6C
BEWSVe
28
2C
OLDMACH
7C
74
IIIEWflJlCH
30
34
OLDIO
78
7C
BEWIO
38
3C
Hexadeciaal
Displacement
-----------0
8
10
18
20
28
30
38
40
48
4C
50
54
58
60
68
70
78
260
referenced during
Field
Naae
IPLPSW
IPLCCW1
IPLCCW2
OLD EXT
OLDSVC
OLDPROG
OLDMACH
OLDIO
CSW
CAW
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
TIMER
DS
NEWEXT DS
NEWSVC DS
NEWPROG DS
NEWMACH DS
NEWIO
DS
1
////1//////////////1/////////////////1
Field Description, Contents, flJeaning
--------------------------------------
D X'00040000',V(DflJ7INI)
D
D
External interrupt old PSW
D
Supervisor call old PSi
D
prograa check old PSW
D
Machine check old PSW
D
Input/output old PSW
D
Channel status word
D
Channel address word
F
Reserved for IBM use
F
TOn clock
F 4X' FF'
Reserved for IBM use
F
D X'00040000',V(DM7EXT)
D X'OO040000',V(DflJ1SVC)
D X'00040000',A(RIXOUCH)
D X'00020000',A(OLtfIJACH)
D X'OO040000',V(DflJ7IOMIB)
IBM VM/370 Data Areas and Control Block Logic
,
,
SVECTOBS
•
RSCS-DEFIBED LOi STORAGE
RSCS-defined low storage begins at hexadecimal .location 200 and is defined specifically
for the RSCS virtual aachine.
It contains pointers to aodules that comprise the
supervisor, supervisor control queues, and queues of requests for supervisor services.
248
DISP1IJCB
24C
iAITRIQ
250
POSTREQ
ACTIVE
254
IOREQ
214
!UIBMAP
258
TiSKREC
218
!lIBSIZE
2SC
M1IBREQ
21C
QUEUE
2EO
ASYBRE(;
220
QUEUEBD
264
lLERTBEQ
224
FREEQ
268
GIVBRlQ
228
T1SKQ
26C
TAKEREC
22C
MPXIOQ
270
TVECTCBO
230
SELIOQ
2711
TVECTCB1
234
IOEXITQ
278
TVECTCB2
238
EXTQ
27C
TVECTCB3
23C
ALERTQ
280
TVECTCB4
2110
GIVEQ
284
TVECTCB5
244
QREQ
288
TVECTCB6
28C
TVECTCB7
200
204
BEiPSll
208
20C
SSAVE
210
Hexadecimal
I:isplacement
------------
Field
Bame
Field Description, Contents, Meaning
IUIBM1P
ORG
DS
DS
DS
DS
DS
SVECTORS+X'200'
D
D'O'
2F
2F'0'
X
X'OO'
AL3 lL3 (0)
V (DMTMIPMS)
MIIBSIZE
DS
F
200
208
210
BEiPSi
SSlVE
lCTIVE
214
218
,
F'O'
Leave rooa for machine extensions
Dispatched PSi for last dispatcher
General-purpose low storage save area
Identifier of currently active task
Address of task element for last dispatchee
Address of start of main storage allocation
map
Total nuater of pages in aain storage
Section 3. RSCS rata Areas and Contrel Blocks
261
SVECTORS
Eexadecimal
tisplacement
262
Field
Name
Field Description, Contents,
~eaning
21C
220
QUEUE
QUEUEND
DS
DS
v (SQUEUE)
V (SQUEUEND)
224
228
22C
230
234
FREEQ
TASKQ
MPXIOQ
SELIOQ
IOEXITQ
DS
DS
DS
DS
DS
A (0)
A (0)
A (0)
A (0)
A (0)
238
EXTQ
DS
A (0)
23C
ALERTQ
DS
A (0)
240
GIVEQ
DS
A (0)
244
QREQ
DS
V (DMTQRQ)
248
24C
250
254
258
25C
260
264
DISPATCH
WAITREQ
POSTREQ
IOREQ
TASKREQ
MAINREQ
SYNREQ
ALERTREQ
DS
DS
DS
DS
DS
DS
DS
DS
V(DMTDSP)
V (DMTWAT)
V (DMTPST)
V (DMTIOMRQ)
V (DMTASK)
V (DMTSTO)
V (DMTASY)
A (DMTSIG)
268
26C
GIVEREQ
TAKEREQ
DS
DS
V (DMTGIV)
V(DMTAKE)
Address of start of sUFervisor queue
Address of end of last supervisor queue
element
Address of start of free element queue
Address of start of task element queue
Address of start of multiplexer I/O queue
Address of start of selectcr I/O queue
Address of start of asynchronous I/O request
element queue
Address of start of external request element
queue
Address of start of task asynchronous request
element queue
Address of start of GIVE request element
queue
Supervisor queue allocation request entry
address
Task dispatcher entry address
Wait request entry address
Post request entry address
I/O request entry address
Task management request entry address
Main allocation request entry address
Asynchronous interrupt request entry address
Task asynchronous signal request)
A(ALERT) entry address
Task request GIVE request entry address
Task request TAKE request entry address
270
274
278
27C
280
284
288
28C
TVECTORO
TVECTORl
TVECTOR2
TVECTOR3
TVECTOR4
TVECTOR5
TVECTOR6
TVECTOR7
DS
DS
DS
DS
DS
DS
DS
DS
A (0)
A (0)
A (0)
A (0)
A (0)
A (0)
A (0)
A (0)
Task
Task
Task
Task
Task
Task
Task
Task
TLINKS
TROUTE
TPORTS
TTAGQ
TCOM
EQU
EQU
EQU
EQU
EQU
TVECTORO
TVECTORl
TVECTOR2
TVECTOR3
TVECTOR4
Link table address
Reserved for IBM use
Svitchable port table address
Tag slot queue
Common routine chain
defined
defined
defined
defined
defined
defined
defined
defined
IBM VM/370 Data Areas and Control Block Logic
field
field
field
field
field
field
field
field
TAG
TAG describes a file enqueued fer processing by RSCS. The data in this area is built
from the TAG record associated with a file via the CP tag command and from the CP speel
file hlock (SFB) that describes the file.
o
TAG NEXT
4
TAGELOCK
8
TAGINLOC
C
TAGLINK
10
i4
TAGINTOD
18
1C
TAGINVM
20
24
TAGRECNl!
28
2C
TAGRECLN
30
TAGID
34
TAGFLAG
T1GINI:EV
T1GCL1SS
TAGCOPY
TAGFLAG2
till/IIII/RESERVED//III//ii///
TAG NAME
38
3C
40
TAGTYPE
44
48
4C
TAGDIST
50
54
TAGTOLOC
58
5C
TAGTOVM
60
64
68
TAG PRIOR
TAGDEV
Section 3. RSCS Iata Areas and Control Blocks
263
Hexadecimal
Displacement
o
4
8
10
18
20
28
2C
2E
2F
30
32
34
35
36
38
44
50
58
60
68
6A
Field
Name
TAGNEXT
TAG BLOCK
TAGINLOC
TAG LINK
TAGINTOD
TAGINVM
TAGRECNM
TAGRECLN
TAGINDEV
TAGCLASS
TAGID
TAGCOPY
TAGFLAG
TAGFLAG2
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
TAG NAME DS
TAG TYPE DS
TAGDIST DS
TAGTOLOC DS
TAGTOVM DS
TAG PRIOR DS
TAGDEV
DS
TAG LEN
264
Field Description, Contents, Meaning
1F
1F
CL8
CL8
CL8
CL8
1F
1H
1X
CL1
1H
1H
1X
1X
1H
CL12
CL12
CL8
CL8
CL8
CL2
2X
EQU *-TAGNEXT
Address of next active queue entry
Address of associated I/O area
Originating location
Next location for transmission
Time of file origin
Originating virtual machine
Number of records in file
Maximum file data record length
Device code of originating device
File output class
File number at origin location
Number of copies required
VM/370 SFELCK centrol flags (SFBFLAG)
VM/370 SFELOK control flags (SFEFLAG)
Reserved for IBM use
Filename
Filetype
File distritution code
Destination location ID
Destination virtual machine ID
Transmission priority
Active file's virtual device address
Length (in tytes) of the file TAG (X'OD')
IBM VM/370 Data Areas and Control Block Logic
TAGABEA
TAGABEA in DMTAXS module contains tag queue pointers and other
It is pointed to by TTAGQ in SVECTOBS.
o
TAGAFBEE
4
TAGACIN
TAGACOUT
8
TAGAGOT
C
Hexadecimal
tisplacement
'IAGAHOLI
Field
Name
------------
Field Description, Contents, Meaning
--------------------------------------
0
TAGAFREE
DC
A (0)
4
TAGACIN
TAGACOUT
TAGAGOT
TAGAHOLD
DC
DC
DC
DC
A (0)
A (0)
H'O'
H'O'
8
C
E
tag ccntrol informaticn.
Address of queue of free TAG slots
elements)
Pointer to queue of active inFut TAGs
Pointer to queue of active cutput TAGs
Number free slots left
Number slots to be held
(or
The format of a TAKE request table is:
n.
V
Task name of GIVE requestor
4
A(TAKE Request Buffer)
8
A(TAKE Response Buffer)
The TAKE request table corresponds to the GIVE request table. It is built
performing the requested service (via a GIVE request by another task).
by the task
Section 3. RSCS Iata Areas and Control Blocks
265
TANKDSEC
TANKDSEC is used to reference buffer data and control information ccntained in tanks,
which are unit buffers used to deblock the larger TP buffers. (TP buffers are defined by
the needs of an individual remote station and their size varies from station to station.)
$TANKPOL in mcdule DMTSML points to a queue of available tanks.
o
4
8
r
TANKCHN
1
1-------------------------------------------------------I
TANKRCB I TANKSRCB
TANKCNT
1-------------------------------------------------------I
TANKDATA
DO
Hexadecimal
Displacement
o
4
5
6
8
DO
266
Field
Name
TANKCHN DC
TANKRCB DC
TANKSRCB DS
TANKCNT DS
TANKDATI DS
TANKEND ·DS
Field Descripticn, Contents, Meaning
A (0)
1C
1C
1H
CL200
OF
Tank chain field
Tank record control byte
Tank subrecord control byte
Count of data bytes in tank
Data area in tank
Forc~ next to word boundary
IBM VM/370 Data Areas and Control Block Logic
TAREA
TAREA an area associated with each task. This area is used to save the contents of the
task's PSi and general registers and to flag whether or not a task has infcrmation ready
to pass. TAREA comprises the first 78 bytes of the storage area defined in each task's
storage.
0
TPSW
4
8
TGREGO
C
TGREG1
10
TGREG2
14
TGREG3
18
TGREG4
lC
TGREG5
20
TGREG6
24
TGREG7
28
TGREG8
2C
TGREG9
30
TGREG10
34
TGREG11
38
TGREF12
3C
TGREG13
40
TGREG14
44
TGREG15
48
TREQLOCK
Section 3. RSCS Iata Areas and Control Blecks
267
TAREA
Hexadeciaal
Displacement
-----------0
8
C
10
14
18
1C
20
24
28
2C
30
34
38
3C
40
44
48
268
Field
Naae
Field Description, Contents, !!eaning
TPSW
DS
1D
TGREGO
TGREGl
TGREG2
TGREG3
TGREG4
TGREG5
TGREG6
TGREG1
TGREG8
TGREG9
TGREG10
TGREG11
TGREG12
TGREG13
TGREG14
TGREG15
TREQLOCK
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
IF
1F
1F
1F
1F
1F
IF
1F
IF
1F
1F
1F
IF
IF
1F
1F
IF
~-------------------------------------
PSI with which a teaporarily interrupted task
resuaes execution
Save area for general register 0
Save area for general register 1
Save area for general register 2
Save area for general register 3
Save area for general register 4
Save area for general register 5
Save area for general register 6
Save area for general register 1
Save area for general register 8
Save area for general register 9
Save area for general register 10
Save area fer general register 11
Save atea for general register 12
Save area for general register 13
Save area for general register 14
Save area for general register 15
Syncbronization lock used to signal
wbether or not a task bas inforaation
IBft Vft/310 Data Areas and Control Block Logic
TASKE
TASKE defines symbolic names of status information pertaining to an active task.
The TASKQ field of SYECTORS points to a queue of task elements, each cf which is defined
by this DSECT. The queue consists of one task element (~ASKE) for each active task.
o
TASKNEIT
4
TASKSAYE
a
TASKNA!!E
c
Hexadecimal
Displacement
------------
111///////T1SKSPIB/I///////1
Field
Name
TASKNEIT DS 1F
4
TASKSAYE
TASKNA!E
TASKSP!R
TASKSTAT
C
E
DS
DS
DS
DS
1F
CL4
lL2
11
!!.!!§ g§.t!!l§g in TASKSTIT
WAITING EQO XtaO'-----LOCKLIST EQO 1'40'
F
TISKID
Field Description, Contents, Beaning
0
a
TISKSTIT
LII;BO
EQO IiOii
TASKID
DS 11
Address of the next element on the task
elellent queue
Address of this task's Task Save Area (TAREA)
Task name specified ty the task; 4 bytes long
Reserved for IBM use
Status flags associated with the task
Flag set to 1 when task is ncndispatchable
Flag set to 1 while task is waiting fer the
synchronous lock list
Flag set
to 1 wben
a task
is being
terminated.
Number ID fer the task; 1 byte is assigned by
the supervisor when task is made active
Section 3. RSCS tata Areas and Contrel Blocks
269
TCTDSECT
TCTDSECT defines the format of six tables used by module D8TSML that are at labels
$CCOM1, $WCO"1, $PCOM1, $RCOM1, $UCOM1, and $JCOM1. Each table corresponds to a DMTS8L
input/output processor and is used by that processor to perform its l/C function.
The GIVE request table and the GIVE request buffer used by D!TSML are e.bedded in the
task control table
at locations X'24' through 1'30' and
1'34' through 1'40',
respectively.
TCTEBTY
TCTSTRT
0
TCTRTD
4
TCTtlTA
8
TCTCCW
C
TCTFLAG
TCTOPCOD
TCTCCliCT
TCTECB
TCTSTAT
TCTliFE
10
14
TCTSAV1
18
TCTDEXT
1C
TCTRCER I TCTRCET
TCTFCS
20
TCTCOM
24
TDEVSYNC
28
TDEVREQN
2C
TDEVREQ
30
TDEVRESP
34
TDEVRLEN
TDEVFUD
I///TDEVRESV//I
38
TDEVTAG
3C
TDEVFIOA
40
'1'DEVLIBK
TDEVSOPT
44
48
TSW1
4C
TSi3
TSW2
TSli4
TCTTOVM
50
54
TCTTANK
58
TCTBUFER
5C
270
TCTTNKLM I
TCTTNKCT
TCTEUFLM
IBM V"/370 Data Areas and Control Block Logic
TCTBUFCT
TCTDSECT
Hexadecimal
Displacement
Field
Nalle
Field Description, Contents, Meaning
-----------0
0
2
4
8
9
C
D
E
10
TTCT
TCTSTRT
TCTENTY
TCTRTN
TCTCCW
TCTDATA
TCTFLAG
TCTOPCOD
TCTCCWCT
TCTECB
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
OB
CL2
CL2
CL4
CL1
AL3
CL1
CL1
AL2
CL1
Branch to proper processor entry
Address portion modified by Frocessor
Eranch to next Frocessor via commutator
CCW for device operation code
Address of data transferred
Flags on CCli
Save area for CCW operation code
CCli count of data transferred
Event control block
~it§ g~!:!1!~g
11
TCTBUSY
in TCTECB
EQU i'10'----
Device busy bit
TCTSTAT
DS
Status flags
CLl
Bits defined in
TCTSTAT
TCT1052--EQU 1'10'-----TCTREL
TCTOPEN
TCTACT
EQU X'04'
EQU X'80'
EQU X'40'
TCT status flags for 1052
Interlock release request for console
TCT open bit
Action required on this TCl
12
14
18
1C
1E
1F
20
TCTWFB
TCTSAV1
TCTNEXT
TCTFCS
TCTRCBR
TCTRCBT
TCTCOM
DSAL1
DS 1F
DS 1F
DS AL2
DS CL1
DS CL1
DS, 1F
Waiting for buffers
Save area for processor routine
Next TCT in chain
Function control sequence mask
RECV record control tlock
Trans record control block
Pointer back to commutator
24
28
2C
30
TDEVSYNC
TDEVREQN
TDEVREQ
TDEVRESP
DS
DS
DS
DS
1F
CL4
1A
1A
Synch lock
File access name
Request buffer address
Response tuffer
34
35
36
37
38
3C
40
48
49
4A
4B
4C
TDEVRLEN
TDEVFUN
TDEVRESV
TDEVSOPT
TDEVTAG
TDEVFIOA
TDEVLINK
TSW1
TSW2
TSW3
TSW4
TCTTOVM
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
AL1
AL1
AL1
AL1
1A
1A
CL8
AL1
AL1
AL1
AL1
CL8
Request length
Request function
Reserved for IBM use
Subordinate option byte
Tag address
File I/O area
Link name
Device switch 1
Device switch 2
Device switch 3
Device switch 4
Virtual machine output destination
54
58
5C
5D
5E
5F
TCTTANK
TCTBUFER
TCTTNKLM
TCTTNKCT
TCTBUFLM
TCTBUFCT
DS
DS
DS
DS
DS
DS
1F
1F
CL1
CL1
CL1
CL1
Next tank to generate output
Address of current buffer
Maximum numter of tanks assignable
Current numter assigned
Maximum numler of tuffers assignable
Current numler assigned
Section 3. RSCS tata Areas and Control Blocks
211
272
IB! V8/370 Data Areas and Control Block Logic
Appendixes
Information in the following appendixes supplements
through 3 of this publication:
the text
in Sections
1
•
"AFpendix A. CP and RSCS Equate Sy.1::ols" contains asse.bler
symbols used in CP and RSCS to reference data.
•
"Appendix B. RSCS Control Areas" shows
during execution of RSCS tasks.
those constants and
variables used
•
"AFpendix C. RSCS Request Elements" contains information on
tables used during RSCS task-to-task communication.
and formats of
•
"APFendix D. CMS Equate Symbols"
used in CMS to reference data.
•
"Appendix E. Data Areas and Control Elock References" lists the names of CP,
CMS, and RSCS control blocks. This appendix (1) shows module references to
data areas and/or control blocks and (2) gives information on how certain
data areas or control blocks are created and released.
langua~e
equate
contains Assembler language equate symbols
Appendixes
273
274
IBM VM/370 Data Areas and Central Block Logic
Appendix A.
This Appendix contains
and RSCS data for:
•
•
•
•
•
VM/370
YM/370
YM/370
VM/370
VM/370
CP and RSCS Equate Sumbols
Assembler language equate symbols used
tc reference CF
Device Classes, Types, Models, and Features
Machine Usage
Extended Control Registers
CP Usage
Registers
Appendix A. CP and RSCS Equate sy.bols
275
!~L11~ ~~!!£~ £1!~§~§,
Field
Name
~X~~§, ~Q~~1§,
!!~
!]!TU]!S
Field Description, Contents, Meaning
CLASTERM EQU
X'80'
Terminal device class
TYP2700
TYP2955
TYPTELE2
TYPTTY
TYPIBM1
TYP2741
TYP1050
TYPUNDEF
TYPBSC
TYP3210
TYP3215
TYP2150
TYP1052
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'40'
TYP2700
X'20'
X'20'
X' 10'
X'18'
X' 14'
X, 1C'
x'80'
X'OO'
TYP3210
TYP3210
TYP3210
2700 bisyncronous line
2955 communications line
Telegraph terminal control type II
Teletype terminal
IBM terminal contrel type I
2741 communications terminal
1050 communications terminal
Terminal device tYFe is undefined
Bisyncronous line for 3270 remote stations
3210 console
3215 console
2150 console
1052 console
FTRDIAL
EQU
X'01'
Dial feature
CLASGRAF EQU
X'40'
Graphics device class
TYP2250
TYP2260
TYP2265
TYP3066
TYP1053
TYP3277
TYP3278
TYP3284
TYP3286
TYP3287
TYP3288
TYP3138
TYP3148
TYP3158
X'80'
X'40'
X'20'
X'10'
X'08'
X'04'
X'01'
X'02'
TYP3284
TYP3284
TYP3284
TYP3277
TYP3271
TYP3277
2250
2260
2265
3066
1053
3271
3278
3284
3286
3287
3288
3138
3148
3158
FTROPRDR EQU
CLASURl EQU
X'80'
X'20'
operator identification card reader
Unit record input device class
TYPRDR
TYP2501
TYP2540R
TYP3505
TYP1442R
TYP2520R
TYPTIMER
TYPTR
TYP2495
TYP2671
TYP1017
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'81'
X'82'
X'84'
X'88'
X'90'
X'40'
X'20'
X'21'
X'22'
X'24'
Card reader device
2501 card reader
2540 card reader
3505 card reader
1442 card reader/punch
2520 card reader/punch
Tiller device
TaFe reader device
2495 magnetic tape cartridge reader
2671 paper tape reader
1011 paper tape reader
CLASURO
EQU
X'10'
Unit record output device class
TYPPUN
TYP2540P
TYP3525
TYP1442P
TYP2520P
TYPPRT
TYP1403
TYP3211
TYP3203
TYP1443
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'82'
X'84'
X'88'
X'90'
X'40'
X'41'
X'42'
X'43'
X'44'
Card punch device
2540 card punch
3525 card punch
1442 card punch
2520 card punch
Printer type device
1403 printer
3211 printer
3203 printer (3211 and 14C3)
1443 printer
276
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQO
EQU
EQU
EQU
EQU
EQU
EQU
display unit
display station
display statien
console
printer
display statien
Model 2A system console
printer
printer
printer
printer
system console
system console
system console
IBM VM/370 Data Areas and Control Block Logic
Field
Name
TYP3800
TYPTP
TYP1018
FTRUCS
FTR4WCGM
Field Description, Contents, Meaning
EQU
EQU
EQU
EQU
EQU
X'45'
X'20'
X'24'
XW01·
X'80'
3800 Printing subsystem
Tape punch device
1018 paper tape punch
UCS feature
3800 has four WCGM availatle. Note that FTBEXTSB (X'40') is
also used for a 3800 printer.
CLASTAPE EQU
X'08'
Magnetic tape device class
TYP2401
TYP2415
TYP2420
TYP3420
TYP3410
TYP3411
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'40'
X'20'
X' 10'
X'08'
TYP3410
2401
2415
2420
3420
3410
3411
FTR7TRK
FTRDLDNS
FTRTRANS
FTRDCONV
EQU
EQU
EQU
EQU
X'80'
X'40'
X'20'
X'10'
7-track feature
Dual density feature
Translate feature
Data conversion feature
CLASDASD EQU
X'04'
Direct access storage device class
TYP2311
TYP2314
TYP2319
TYP2321
TYP3330
TYP3333
TYP3350
TYP2301
TYP2303
TYP2305
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'40'
TYP2314
TYP2311
X' 10'
TYP3330
X'08'
TYP2311
TYP2311
X'02'
2311
2314
2319
2321
3330
3333
3350
2301
2303
2305
TYP3340
EQU
X'Ol'
3340 disk storage facility
FTRRPS
FTREXTSN
FTR2311T
FTR2311B
EQU
EQU
EQU
EQU
FTR35MB
E"T'
\lU
FTR70MB
FTRRSRL
VIRTUAL
SYSVIRT
FTRVIRT
EQU
EQU
EQU
EQU
EQU
X'80'
X'40'
X'20'
X'10'
X'08!
X'04'
X'02'
X'Ol'
X'20'
X'Ol'
CLASSPEC EQU
X'02'
Special device class
TYPCTCA
TYP3704
TYP3705
TYP3851
TYPSRF
TYPUNSUP
EQU
EQU
EQU
EQU
EQU
EQU
X'80'
X'40'
TYP3704
X'20'
X'04'
X'Ol'
Channel-to-channel adapter
3704 programmable communication control unit
3705 programmable communication control unit
3851 Mass Storage Controller
SRF device (#7443)
Device not supported by VM/370
FTRTYP1
FTRTYP2
FTRTYP3
FTRTYP4
EQU
EQU
EQU
EQU
X'10'
X'20'
FTRTYP2
FTRTYPl
Type 1 channel adapter
Type 2 channel adapter
Treat as type 2 channel
Treat as type 1 channel
tape
tape
tape
tape
tape
tape
drive
drive
drive
drive
drive
drive
disk storage drive
disk storage facility
disk storage facility
data cell drive
disk storage facility
disk storage facility
disk storage facility
parallel drum
serial drum
fixed head storage device
Rotational positional sensing (RPS) installed (3340)
Extended sense bytes (24 tytes)
(= VDEV231T)
Top half of 2314 used as 2311
(= VDEV231B)
Bottom half of 2314 used as 2311
35 multibyte data module mounted (3340;
70 multibyte data module mounted (3340)
Reserve/release are valid CCW operation codes
Device is a 3330V virtual machine
Device is a 3330V system virtual machine
3330 virtual (MSS) volume
(370x)
(370x)
adapter (370x)
adapter (370x)
Appendix A. CP and BSCS Equate Symbols
277
Field
Name
Field Description, Contents, Meaning
12its .Q~!i.n~g
EXTMODE EQU
MCHEK
EQU
WAIT
EQU
PROBMODE EQU
~!g.nggfQL~!!~.ng~g
PSW
Bit 12-- extended lIode
Bit 13 - machine check enabled
Bit 14 - wait state
Bit 15 - problell state
X'08'
X'04'
X'02'
X'01'
in Extended f2!
EQU --X'40'---EQU
X'04'
EQU
X'02'
EQU
X'01'
lU ts
.Q~!i.n~g
12its
ATTN
SM
CUE
BUSY
CE
DE
UC
UE
PCI
IL
PRGC
PRTC
CDC
CCC
g~!i.n~g
lFCC
RQll
CEC
EQU
PERMODE
TRANMODE
IOMASK
EXTMASK
i.n
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
in Channel
--X'80'--X'40'
X'20'
X'10'
X'08'
X'04'
X'02'
X'01'
X'80'
X'40'
X'20'
X' 10'
X'08'
X'04'
X'02'
X'01'
Bit
Bit
Bit
Bit
01
05
06
07
~ta!~2 ~g!g
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
32
33
34
35
36
37
38
39
40
41
42
43
44
45
-
(~~!)
4~ 47 -
]its .Q~!i.n~g in Channel Command Word
CD
EQU --X'80'--- ------Bit-32
CC
Bit 33
EQU
X'40'
Bit 34
SILl
EQU
X'20'
SKIP
Bit 35
EQU
X'10'
PCIF
Bit 36
EQU
X'08'
IDA
Bit 37
EQU
X'04'
~its .Q~!i.n~.Q
CMDREJ
INTREQ
EUSOUT
EQCEK
tATACHK
278
EQU
EQU
EQU
EQU
EQU
i1!
..§en2~
X'80'
X'40'
X'20'
X'10'
X'08'
(gg~!g.n
Bit
Bit
Bit
Bit
Bit
0
1
2
3
4
PER enabled
translate mode
summary I/O mask
summary external mask
-
attention
status modifier
control unit end
busy
channel end
device end
unit check
unit exceFtion
program-control interrupt
incorrect length
program cbeck
protection check
channel data check
channel control check
interface control check
chaining check
(CCW)
--chain data
- command chain
- suppress incorrect length indicator
- suppress data transfer
- program-control interrupt FETCH
- indirect data address
!g !g2! g~!if~2)
command reject
intervention required
bus out
equipment check
data check
IBM VM/370 Data Areas and Control Block Logic
Field
Nalle
Field Description, Contents, Meaning
]1ts g~!in~.Q
• BYTE 0
BLKMPI
EQU
SSl!SUPP EQU
TODSYNC EQU
X'80'
X'40'
X'20'
Bit 00 - enable block aultiplexing
Bit 01 - enable SSM suppression
TOD synchronous control
• BYTE 1
PAGE4K
EQU
PAGE2K
EQU
SEG1M
EQU
X'SO'
X'40'
X'10'
Bit OS - use 4K pages
Bit 09 - use 2K pages
Bit 11 - use 1M segllents
X'SO'
X'40'
X'10'
X'OS'
X'04'
Bit 16
1"7
,
Bit 18
Bit 19
Bit 20
Bit 21
• BYTE 3
INTMASK EQU
KEYMASK EQU
SIGMASK EQU
X'SO'
X'40'
X'20'
Bit 24 - mask on interval timer interrupt
Bit 25 - mask on oFerator key interrupt
Bit 26 - mask on external signals 2 througb 7
]1ts g~!11!~.Q
• BYTE 3
PERFCL
EQU
RESPCL
EQU
SCBEDCL EQU
TIMECL
EQU
USERCL
EQU
PRIVCL
EQU
DASDCL
EQU
SEEKCL
EQU
X!SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
Sample hardware/software utilizations
Trace response class
Trace scheduler activity class
Execution timing class
Sample user resource usage class
Privileged operands class
SallPle DASDs: utilizations class
Trace DASD seek activity
• BYTE 4
SPROFCL EQU
X'SO'
Trace system profile class
EQU
EQU
EQU
EQU
X'SO'
X'40'
X'20'
X'10'
Bit
Bit
Bit
Bit
00
01
02
03
-
monitor
monitor
monitor
monitor
Bits defined
;-BYTE-O--BARDSTOP EQU
SYNCLOG EQU
IOLOG
EQU
RECOVRPT EQU
CONFGRPT EQU
DAMAGRPT EQU
WARNGRPT EQU
X'SO'
X'40'
X'20'
X'OS'
X'04'
X'02'
X'01'
Bit
Bit
Bit
Bit
Bit
Bit
Bit
00
01
02
04
05
06
07
-
check stop control
synchronous logout control
I/O logout control
recovery report mask
configuration report mask
external damage report mask
warning condition report mask
• BYTE 1
ASYNELOG EQU
ASYNFLOG EQU
X'SO'
X'40'
Bit OS - asynchronous extended logout control
Bit 09 - asynchronous fixed logout contrcl
• BYTE 2
MFAlUSK
EMSMASK
XC5ASK
SYNCMASK
CKCMASK
CPTMASK
EQU
EQU
EQO
EQU
EQU
EQU
X;20;
Bit
.
- malfunction alert Blask
emergency signal iii ask
- external call mask
- TOD synchronous check mask
- mask on clock comparator interrupt
- mask on processor timer interruFt
~.!ts g~!in~.9
• BYTE 0
PERSUBR
PERIFET
PERSALT
PERGPRS
successful branches
instruction fetches
storage alteration
register alteration
Appendix A. CP and RSCS Equate Symbols
279
!~LJ1~ ~2Y!1~ ~!~B01§
Field
Name
Field Description, Contents, fteaning
It! ts .Q~!!~.Q for TRANS
EQU --X'SO'-ERING
EQU
X'40'
DEFER
EQU
X'20'
LOCK
IOERETN EQU
X'10'
EQU
SYSTEft
X'08'
VFAULT
EQU
X'04'
]guat~§
DELSEGS
DELPAGES
VRALOC
PAGTONLY
NEiPAGES
BEiSEGS
KEEPSEGS
OLDVftSEG
fOE ~g~s~et~E
EQU
X'80'
EQU
X'40'
EQU
X'20'
EQU
X'10'
EQU
X'08'
EQU
X'04'
EQU
X'02'
EQU
X'Ol'
!~£E~
li~lg
Bring requested page
Defer execution until page in core
Lock page for I/O cperaticn
Return I/O errors to caller
Call to DftKPTRAB for system virtual machine space
DftKPTRAN call for virtual page. Caller will not
utilize real address
for Calls !2 ~lUS!1~~~L~~KE1!~1
--Release the segment tables
Release the page/swap tables
Attempt allocation of Virtual=Real area
Only one page table and return
Euild new page/swaF table
Euild new segment table
Retain information in old segment table
yftSEG pOinter in VftELOK valid
].!ts .Q~!ine.2 for Terminal lLQ .Jis ~]KQC]
Output - ftessage not a command response
NOTRESP EQU --X' 4000'--Output - control program error message
EBRftSG
EQU
X'0800'
Output - return immediately after call
BORET
EQU
X'0400'
Output - FRET buffer after queueing
DIRET
EQU
X'0200'
Output - message for system operator
OPERATOR EQU
X'0100'
Output - logoff and drop line after message
LOGDROP EQU
X'80'
Output
logoff and hold line after message
LOGHOLD EQU
X'40'
Output - write this message i •• ediately
PRIORITY EQU
X'20'
I/O reques-t generated 1:1 -virtualllacbin-e
VftGENIO EQU
X'10'
Output - suppress automatic carriage return
NOAUTO
EQU
X'04'
ALARft
EQU
Output - sound the audible alar.
X'02'
Output - suppress time stamp on message
NOTlftE
EQU
X'Ol'
INHIBit EQU
Input - prevent display of this data
X'08'
EDIT
EQU
Input - edit input data for corrections
X'04'
UCASE
EQU
Input - translate data to uppercase
X'02'
]gyste§ for ~i221 l!.!~
CBGSHQ
EQU
X'0200'
CBGRDV
EQU
X'0100'
ACTSFB
EQU
X'80'
OPBSFE
EQU
X'40'
DELSFB
EQU
X'20'
CBGSFB
EQU
X' 10'
ADDSFB
EQU
X'08'
PRTCHB
EQU
X'04'
PCHCHN
EQU
X'02'
RDRCHN
EQU
X' 01'
S~£2!~~I ~2ytin~
~9~~~~~ !~! §~~~ ~~~!~
SyftUBLOK EQU
X'04'
SyftNOUPD EQU
X'02'
SVftSTAY EQU
X'Ol'
280
- ~ftKCKE
Checkpoint a SHQELCK
Change attributes cf real device
File being printed or punched
An open print-punch file
Delete SFELOK from checkpoint
Change existing SFELOK
Add new SFELOK to recovery cylinder
SFELOK goes on print chain
SFBLOK goes on punch chain
SFELOK goes on reader chain
Unlock only the current virtual machine
Lock virtual machine with NOUPDT option
Stack CPEXBLOK for current processor
IBft V8/310 Data Areas and Control Block Logic
Field
Name
Field Description, Contents, Meaning
ClE§§ and Code !2g!!1!!!!Q1!§
MNCLPERF EQU -X'OQ'-Monitor perform class
~.2ni!.2f
EQU
EQU
EQU
EQU
EQU
X'OOOO'
X'0061'
X'0062'
X'0063'
X'01'
Perform
Monitor
Monitor
Monitor
Monitor
MNCOBRD EQU
MNCOWRIT EQU
MNCOERD EQU
X'OOOO'
X'0001'
X'0002'
Response class, begin read code
Response class, write code
Response class, end read code
MNCLSCH
EQO
x'02'
Monitor schedule class
MNCODQ
MNCOAQ
MNCOAEL
EQU
EQU
EQU
X'0002'
X'0003'
X'0004'
Schedule class, drop queue code
Schedule class, add to queue code
Schedule class, add to eligible list code
MNCLUSER EQU
X'04'
Monitor user class
MNCOUSER EQU
X'OOOO'
User class, user data
MNCLINST EQU
X'OS'
Monitor instruction simulation class
MNCOSIM
X'OOOO'
Instruction class; instruction simulation cede
MNCLDAST EQU
X'06'
Monitor DASD/tape class
MNCODASH EQU
MNCODAS EQU
X'OOOO'
X'0001'
DASTAP class, first record
DASTAP class, data records
MNCLSEEK EQU
X'07'
Monitor DASD class
MNCOCYL
EQU
X'OOOO'
DASD class, seeks code
MNCLSYS
EQU
X'08'
Monitor system profile class
MNCODA
EQU
X'0002'
SYS class, DAS:C data
MNCOSYS
MNCOTH
MNCOTT
MNCOSUS
MNCLRESP
EQO
class, system performance
tape header record
tape trailer record
collection suspension record
response class
Appendix A. CP and RSCS Equate Symbols
281
Field
Nalle
Field Description, Contents, Meaning
~3YSte§
!Qf
SIGSENSE
SIGXC
SIGEMS
SIGSTART
SIGSTOP
SIGREST
SIGIPR
SIGPR
SIGSSS
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
SIGIML
SIGICR
SIGCR
~l§!!b ~g£fQ
X'01'
X'02'
X'03'
X'04'
X'05'
X'06'
X'07'
X'08'
X'Og'
Sense order code
External call order code
Emergency signal order code
Start order code
Stop order code
Restart order code
Initial program reset order code
Prograa reset order code
Stop and store status order code
EQU
EQU
EQU
X'OA'
X'OB'
X'OC'
Initial aicroprogram load order code
Initial processor reset order code
Processor reset order code emergency signals
SIGQUI
SIGEXT
SIGSYNC
SIGSHD
SIGCLK
EQU
EQU
EQU
EQU
EQU
X'800'
X'400'
X'200'
X'100'
X'080'
Quiesce emergency signal
Extend emergency signal
Clock synchronization emergency signal
Shutdown emergency signal
Clock check signal (external call signals)
SIGAPR
SIGRES
SIGWAKE
SIGDISP
EQU
EQU
EQU
EQU
X'800'
X'400'
X'200'
X'100'
Automatic processor recovery (external call signal)
Resume external call signal
Wakeup external call signal
Dispatch external call signal
2S2
IBM VM/370 Data Areas and Control Elock Logic
!~nl.Q RE§l~l!!!~
Field
Name
Field Description, Contents, l!eaning
--------------------------------------
~I·b.Ql.!f R~.9.!2!~! !g.!lg!~2
RO
Rl
R2
R3
R4
R5
R6
R7
R8
7
8
Rl0
Rll
R12
R13
R14
R15
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
YO
Y2
Y4
Y6
EQU
EQU
EQU
EQU
0
2
4
6
CO
Cl
C2
C3
C4
C5
EQU
EQU
EQU
EQU
EQU
EQU
0
1
2
3
4
5
C6
EQU
6
C7
C8
C9
Cl0
Cl1
EQU
EQU
EQU
EQU
EQU
7
8
C12
1:'1'\"
1')
C13
C14
C15
EQU
EQU
EQU
13
14
15
R9
""'\O!U
0
1
2
3
4
5
6
9
10
11
12
13
14
15
9
10
11
General register definitions
I
)
}
Fleating-point register definitions
Control register definitions
(
.£
}
Appendix A. CP and RSCS Equate Symbols
283
284
IBM VM/370 Data Areas and Centrol Block Logic
Appendix B.
RSCS Control Areas
This appendix lists the control areas used during task processing. !nfcr:aticn
such as lists of synchronous locks, channel Frogra.s, TAKE request tables and
buffers, and various work constants are included in these areas.
Appendix B. RSCS Centrel Areas
285
The AXS Monitor Control Area is a data area used by tMTAXS to set up synch locks, a TAKE
request table, a TAKE request and response buffer, and an input tuffer.
Field
Name
AisNAME
REXNAME
DC
DC
OF'0',CL4'AXS'
OF'O',CL4'REX'
!ie!g ]2!!§£!!E1!.Q1!, ~ont~.!!!§, Meaning
Task name for AIS routine
Task name for control monitor
AXSLOCKS
DC
DC
DC
A (ARRLOCK)
A (REQLOCK)
X'80',AL3(CMDLOCK)
File tag arrival synchronous lcck address
Request arrival synchronous lock address
Command synchronous lock address
ARRLOCK
CMDLOCK
DC
DC
F'O'
F'O'
File tag arrival synchronous leek
Command synchronous lock
AXSTAKE
DC
DC
DC
DC
OF'O'
C14' •
A11 (L'AXSREQ) AL3(AXSREQ)
A (AXSRESP)
TAKE request table
Giver's task na.e
Pointer to request tuffer (input)
Pointer to response buffer (output)
AXSREQ
AXSRESP
DC
DC
IL140'00'
X1136'00'
TAKE request buffer
TAKE response tuffer
CMDIN
CMDINPGS
DC
DC
C1122' ,
X'OO'
Input buffer for command element
Co.mand in progress switch
AXSCSAVE
DC
18F'0'
Co •• cn routine save area
286
IBM VM/310 Data Areas and Control Block Logic
The REX Moniter Control Area is a data area used by IMiREX to initialize the DMTAXS and
DMTLAX modules, point to queues of system data (such as the link table chain and the
chain of tag elements), set up a series of synch locks for REX processing function, set
up a console element, read and write channel programs, a console tatle buffer, a message
buffer, a TAKE request table, and buffer, and various work constants.
Field
!!,gme
REXREX
REXAXS
REXLAX
DC
DC
DC
OF'0',CL4'REX'
OF'0',CL8'DMTAXS'
OF'0',CL8'DMTLAI'
REXTVECT
DC
OF'O'
REXEND
REXLOCKS
ATTNLOCK
REXCONSL
!l~lg ~~§crlE112~, ~2~!~nt§, ~~~~ing
iask name
AXSname
LAXname
DC
V (DMTSYSLKj
DC
DC
DC
DC
DC
V (DMTSYSRT)
V (DMTSYSPT)
V (DMTSYSTQ)
V (DMTCOMVC)
V(DMTSYSND)
LlnK. tat.le chain
Route table chain
Switchatle port chain
iag slot queue
Common routine vector
End of REX initial load
DC
DC
DC
DC
DC
DC
OF'O'
I'00',AL3(REQLOCK)
I'00',AL3(ATTNLOCK)
I'40',AL3(REICONSL)
I'80',AL3(PROGLOCK)
OF'0',X'00',AL3(0)
Main REX wait list
Request arrival synchrenous lock address
Console attention synchronous lock address
Console I/O synchronous lock address
Program check synchronous leck address
Console attention lock
DC
DC
DC
DC
DC
DC
F'O'
AL2(CONSADDR)
ALl (1)
ALl (TYP3210)
DC
X'OO'
DMTREXCN
DC 31'00'
EQU REXCONSL
Synchronous lock for I/O operation
CUU console device address
Cne byte requested on unit check
Console device type code
Channel program address to be filled in
S10 condition code and ending csw
return information
Sense return information on
unit check
Reserved for IBM use
External name
CONSADDR
EQU X'009'
Iefault console cuu
REXREAD
REXWRITE
CCW I'OA',REXIN ,SILI,L'REXIN
CCi X'09',REIOUT+2,SILI,0
Reader operator response
iype a console message
REIIN
DC
Console input buffer
REIMSG
DMTREXID
REIOtlT
DC CL11'M OP'
EQU REIMSGt-2
DC CL 130' ,
MSG command start
iransfer user identification
Cutput l:uffer
REITAKE
DC
DC
OF'O'
CL4' ,
DC
AL1(L'REXREQ),AL3(REIREQ)
DC
A (REIRESP)
Request TAKE table
Sending task name filled in by
TAKE manager
Address and length of
request buffer
Address of response buffer
REIREQ
DC
XL140'00'
iAKE request buffer
REIRESP
DC
AL 1 (0)
Never any response messages
A (0)
2F'O'
CL 130' ,
Appendix E. RSCS Control Areas
287
The SML Monitor Control Area is used to define various constants, save areas, BSC centrel
sequences, channel command words, and bit settings used during SMt processing.
Field
!!l!~
!!~lg ~~2cr!E!io1!, £g1!!~1!!2' ~~~1!!1!g
Active communications buffer
Last FCS transmitted tc HASP
Standard FCS
FCS compare area
temporary storage
Maximum repeated hlocks
First byte of halfword
Elock check count out
Spacer
Elock count character expected
CBUFLAST
CRESP
CREGS
CRETREGS
$COMEXIT
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DS
DS
DC
A (0)
X'SFCF'
X' SSC l '
AL2 (0)
H'O'
H'3'
AL 1 (0)
lL1 (X'SO')
AL 1 (0)
AL1 (X'SO')
H'O'
10X'00'
AL 1 (0)
3F
3F
A ($START)
CECB
CSETBCB
DC
DC
X'OO'
X'OO'
Last BCE sent for reset
CCSW
COLDRCB
CUNITCMD
DS
DC
DC
DC
OF
XLS'OO'
X'OO'
X'OO'
Force fullword alignment
temporary storage for csw
Last RCE sent
Command code storage
CLASTCAW
DC
F'O'
CCW address save
BUFSYNSW
DC
X'OO'
Euffer synchronization switch
$TPPNONE
OFLSW
GDQBUFS
$COMBUSY
CUWFAKE
CACKSW
l!!ts
EQU
EQU
EQU
EQU
EQU
EQU
X'SO'--
AtAECB
ADACUU
AtCCWA
DC
DC
DC
F'O'
Synchronous lock
X'OOOO',AL1(1),AL1(TYP2700)
A (CCTCCW)
Adapter CCW addr
AtASIOCC
EQU
*
SIO condition code
AtACSW
ADASENSE
AtSAV
DC
DC
DC
2F'0'
F"O'
SF'O'
Adapter ending CSW
Adapter sense hyte
$SIO register save area
XSTXSEQ
XETBSEQ
XACKSEQ
XNAKSEQ
XSYNSEQ
Cont!21 ~ggyg1!£g§
DC
AL1(XLDR,XSTX)
DC
lL1(XTRL,XETE)
DC
lL1(XDLE,XACKO)
DC
AL1 (XSYN,XNIK)
DC
lL1(XSYN,XSYN,XSYN,XSYN)
CEUFFER
CFCSOUT
CFCSSTD
FCSCTEMP
CTEMP
CMAXDUP
CECBCNTO
CECBCNTI
28S
defined !1!
Save of start of last buffer
Response character received
Register save area
Save area
COMSUD initial entry peint
l!!!I~I!SW
X'40'
X'20'
X'10'
X'OS'
X'04'
Stop all buffering
Flush huffer
Stop dequeuing buffers
Communications inactive
tummy read on for unit exception recovery
ACK received
Start-of-text sequence
End-of-text-block sequence
positive acknowlegement sequence
Negative acknowlegement sequence
Synchronization sequence
IBM VM/370 Data Areas and Centrol Block Logic
Field
!!~Ile
~~g~~~J ~2~!g~g
!2!Q§
CCiS
CCiA
CCiB
CCiC
Normal Data Write with Return Data Read
CCW--l,ISYNSEQ:cD+SILI,4----- ---synchronization sequence
write buffer
CCi 1,O,CC+SILI,O
CCW 1,XETBSEQ,CC+SIL1,2
Write ending sequence
Read return data
CCW 2,0,S1L1,0
CCiD
CCW
2,0,S1L1.SK1P,65000
Iisable
CCWOFF
WRITE
READ
NOP
SENSE
SENSE
DISABLE
EQU
EQU
EQU
EQU
EQU
EQU
x; 0
i~
X'02'
X' 03'
X' 04'
X' 04'
X'2F'
Adapter
Adapter
Adapter
Adapter
Adapter
Adapter
write command cede
read command cede
NOP command code
sense command code
sense command cede
disable command cede
Appendix B. RSCS Contrcl Areas
289
290
IBM VM/370 Data Areas and Control Block Logic
Appendix C.
RSCS Request Elements
This a~pendix provides information en the format and use of BSCS request
elements. These elements are used by RSCS tasks in task-to-task cc.munication.
The information provided includes:
•
The name of the module that builds the element
•
The functicn performed by the element
•
A brief description of the element's usage
•
The format of the element
•
Any operational notes that might be
is used
useful in understanding how the element
Appendix C. RSCS Request Elements
291
BUILT BY:
DftTCftl
lUWC!ION:
Execate an lIS command
DISCBIPTION:
This ALERT element is passed via ALERT to the lIS task (DMTAIS) to request
second-level processing of ORDER and PURGE commands.
o
Length
(n-1)
Function
Code: 1'10',1'11'
Response
Code
Modifiers
linkid
C
spcolid count
(n-I'E')/2
spoolid
10
spoolid
spoolid
OPERlTIOIAL tOTES
The Iialid field specifies the affected link. The spoolid fields are binary halfwords and
specifJ the files enqueued on the specified link which are to te reordered or purged. The
sFoolid COWDt field is a binary halfword and specifies the total numter cf spoolid fields
preseat. The meanings of the other fields follow.
2J~J
f.tHiJi
lUDcti0B Co •• : x'10'
C••• Ii:
1'00' II ••• mt accepted for processing
1'10' Ile.ent rejected, busy
• • lipO • • •
lollifier.:
1'10' 1 •• poDse .essages go to local RSCS operator
X'OO' lespoDse messages go to specified link.
'.Betio. Code: X'11'
Response Codes:
X'OO' Ileaeftt accepted for processing
1'10' Ilement rejected, busy
ftodifiers:
I'SO' lesponse messages go to local RSCS operator
1'_0' farge all files enqueued on the specified link
1'00' Parge only specified files, response messages go to sFecified link
2~2
III '1/370 Data lreas and Control Block Logic
BUILT BY:
DMTCMX
FUNCTION:
Execute AXS command
DESCRIPTION:
This ALERT element is passed via ALERT tc the AXS task (DMTAXS) to request
second-level processing of CHANGE commands.
o
~--------------------------------------------------------,
Length
(X'33')
Function
Code: X'20'
10
Modifiers
linkid
4
C
I Response
I Code
priority
spoolid
HOLD
COpy
CLASS
14
Distribution Code
1C
filename/filetype. dsname
OPERATIONAL NOTES
The linkid field specifies the link on which the object inactive file is enqueued. The
spoolid field is a binary halfword and specifies the object file's VM/370 RSCS
identifier.
The following fields are specified only when the corresponding file attribute is to be
changed. If the field is not specified, it is set to all 1 ~its (X'FF~~~')e
•
•
•
•
•
•
priority halfword contains binary priority 0-S9
HOLD has the following: X'7F' -- set hold status (HeLD)
X'3F' -- reset hold status (NOHOLD)
CLASS 1-tyte EBCDIC class, A-Z, 0-9
COpy halfwcrd binary copy count, 1-99
Distributicn code S-byte EBCDIC spool file distribution code
Filename/filetype, dsname, 24-byte EBCDIC spocl file filename or filetype or dsname
The meanings of the other fields follow.
Function Code: X'20'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers:
X'SO' Response messages go to local RSCS operator
X'OO' Response messages go to specified link
Appendix C. RSCS Request Elements
293
EUILT BY:
DMTCMX
FUNCTION:
Execute a line driver command
DESCRIPTION:
This ALERT element is passed via ALERT to a line driver task (DMTNFT,
DMTSBL) to request second-level processing of START, DRAIN, FBEE, BOLD, and
TRACE commands.
o
Length
(X'OB')
Function
I
Code: X'80,X'81',1 Response
X'82',X'83',X'84'1 Code
Modifiers
4
locid
L-____________________________________________________ - - - - J
OPERATIONAL NOTES
The locid sFecifies the location that is
the other fields follow.
to receive response messages.
Function Code: X'80'
Response Codes:
X'OO' Element accepted for Frocessing
X'10' Element rejected, busy
Modifiers:
X'80' Start updated classes
X'OO' Reset DRAIN status
Function Code: X'81'
Response Codes:
X'OO' Element accepted for processing
X'10' Ele.ent rejected, busy
Modifiers: Unused
294
IBB VM/310 Data Areas and Control Block Logic
The .eanings of
Function Code: X'82'
Response Codes:
1;00; Element acceptea tor processing
X'10' Element rejected, busy
~odifiers:
Unused
Function Code: X'83'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers:
X'80' HOLD Immediate
X'OO' HOLD after file processing
Function Code: X'84'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers:
X'CO' TRICE end
X'SO' TRICE errors
X'OO' TRICE all
lppendix C. RSCS Request Elements
295
BUILT BY:
DMTCMX
FUNCTION:
Execute a line driver command
DESCRIPTION:
This ALERT element is passed via
DMTSML)
to request second-level
commands.
o
Length
(X' OF' )
Function
Code: X'90',X'91'
ALERT to a line driver task
processing of BACKSFAC and
Response
Code
(DMTNPT,
FWDSPACE
Modifiers
4
locid
C
Count
OPERATIONAL NOTES
The locid specifies the location that is to receive response messages. The count field is
a binary fullword, and specifies the number of units to be backspaced or forwardspaced.
The .eanings of the other fields follow.
Function Code: X'90'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers:
X'80'
Backspace count
X'OO' Backspace file (restart)
Function Code: X'91'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers: Unused
296
IBM VMj370 Data Areas and Control Block Logic
BUILT BY:
DMTCMX
FUNCTION:
Execute a line driver command
DESCRIPTION:
This ALERT element is passed via ALERT to a line driTer task
DMTSML) to request second-level processing of FLUSH coa.a~'s_
o
Length
(X' OD' )
Function
Code: X'AO'
Respcnse
Code
(DaI;if,
Modifiers
4
C
Spoolid
OPERATIONAL NOTES
The locid specifies the location that is to receive response messages. T~. speolii field
is a binary halfvord, and specifies the VM/370 RSCS identifier of the actiYe file to b~
flushed. The meanings of the other fields follow.
Function Code: X'AO'
Response Codes:
X'OO' Element accepted for processing
X'10' Element rejected, busy
Modifiers:
X'80' Flush all cOFies, purge file
X'40' Flush hold, keep file, do not decrement copy count
X'OO' Flush, decrement copy count, purge file if nc copy count reaaimz
Appendix C. RSCS Request Elements
297
BUILT BY:
DMTCMX, DMTMGX
FUNCTION:
Execute a line driver command
DESCRIPTION:
This ALERT element is passed via ALERT to a line driver task (DMTNPT,
DMTSML) to forward messages, and te request second-level processing ef CMD
cOllllands.
o
Length
(n-l)
Function
Code: X'BO',X'B1'
Response
Cede
Modifiers
4
locid
C
Message/Coamand Text
OPERATIONAL NOTES
The locid specifies the locaticn that is to
meanings of the other fields follow.
receive the
Function Code: X'BO'
Response Codes:
X'OO' Element acceFted for processing
X'10' Element rejected, busy
Modifiers: None
Function Code: X'Bl'
Response Codes:
X'OO' Eleaent accepted for Frocessing
X'10' Element rejected, busy
Modifiers: One-byte binary RSCS severity code
298
IBM VM/370 Data Areas and Control Block Logic
message or command
text. The
BUILT BY:
DftTNPT, DMTSML
FUNCTION:
Execute an RSCS 0Ferator command
tFSCRIPTION:
This request element is passed by a line driver via GIVE/TAKE
task in response to a command entry at a remote station.
o
Length
(n-1)
Function
Code: X'OO'
to the REX
Unused
4
RSCS Operator
Command Line Text
,,
r
OPERATIONAL NOTES
No response text is returned.
Command responses are distrituted via
D~TMGX.
Appendix C. RSCS Request Elements
299
BUILT BY:
DMTNPT, DMTSML
FUNCTION:
Initiates or terminates processing of an input or output file.
:CESCRIPTION:
This request element is passed via GIVE/TAKE to
drivers to effect local spool file access during
remote station.
o
Length
(X'13')
I Function Code: I
I X'01', X'02',1
I X'11', X'12' I
Unused
the AXS task by line
communications with a
ftodifiers
4
TAG Address
8
I/O Area Address
C
linkid
OPERATIONAL NOTES
The use and meaning of the various fields depends on the requested function, as described
telow. Certain fields may be updated during request processing. The (updated) file
request element is returned to the requestor as a GIVE response.. The meanings of the
other fields follow.
Function Code: X'01'
Mcdifiers: Unused
Tag Address: Response field that points to the opened file's active TAG in DMTSYS
I/O Area Address: Response field that points to a virtual
opened file's first VM/370 spool data buffer.
page buffer
linkid: Request field that specifies the requesting line driver's linkid.
Response Post Codes:
X'08' Terminal system error
X'04' No file available
X'02' Undefined linkid
X'01' Previously open file returned
300
IBM VM/370 Data Areas and Control Block Logic
containing the
Function Code: X'11'
Modifiers: X'80' Do not return possible Freviously opened file
Tag Address: Request field which points to a
constructed by the calling line dri~er~
prototype file
TAG for the
output file,
I/O Area Address: Response field which pGints to
a virtual page buffer ccntaining an I/O
table, a write CCi, and a buffer for processing the output file.
linkid: Request field which specifies the requesting line driver's linkid.
Response post Codes:
X'04' Error, file not opened
A'U~' Undefined linkid
X'01' previously open file returned
Function Code: X'02'
Modifiers:
X'80' Do not purge copy or file
X'40' Purge all copies, and purge file
Tag Address: Request field
by open input.
which points to the file's active TAG
in tMTSYS, as supplied
I/O Area Address: Unused
linkid~
Unused
Response Post Codes:
X'04' TAG not found, close failed
Function Code: X'12'
Modifiers: Unused
Tag Address: Request field which points to a prototype file TAG for the output file,
constructed by the calling line driver~ This TAG is used to update the parameters
to be set for the output file.
I/O Area Address: Request field which pOints to
the file's I/C area, as supplied by open
output,.
linkid: Unused
Response Post Codes:
X'04' I/O area not found, close failed
Appendix C. RSCS Request Elements
301
BUILT BY:
DMTCMX
FUNCTION:
Request line port allocation
DESCRIPTION:
This ALERT element is passed via ALERT to the LAX
and reserve line ports for links being activated
command.
o
4
Length
(X'OF')
Function I
Code: X'Ol'l
Response
Code
task (DMTLAX) to verify
in response to a START
Onused
Unllsed
Line Address
8
linkid
OPERATIONAL NOTES
Certain fields are updated during processing.
The meanings of the fields follow.
ResFonse Codes!
X'08' Specified line address not attached (CC=3)
X'04' Specified line address not BSC port device type
X'02' Line not available
Line
Address: Request field specifying requested line address.
Zero specification
implies request for allocation of a switchable line from the port table.
If
successful, the port's line address is returned in this field as a resFonse.
linkid: Response field specifying the ID of the link that has reserved
requested line address (with response code X'02').
302
IBM VM/370 Data Areas and Control Block Logic
the particular
BUILT BY:
DMTREX, DMTCMX, DMTAXS, DMTNPT,
FUNCTION:
Issue an RSCS message
rESCRIPTION:
This request element is passed via GIVE/~AKE to the REX task, to specify
the construction and distribution of an RSCS message (ty DMTMGX).
o
Length
(n-1)
Function
Code: X'02'
4
Receiver
DM~SML
Routing
Code
,
___ .:
Severity
Code
;:I
.LV~.LU
C
Receiver userid
14
18
Issuing Module Code
Binary Message Number
Action
Code
Unused
1C
8-byte Variable Sutstitution
Values for Message Text
OPERATIONAL NOTES
The routing code and severity code from the message definition (in DMTMSG) are used when
not supplied in the message request element. If the message is not defined in D~TMSG; it
is constructed using the specifications in the message request element, and the "variable
substitution values" become the message text, unmodified.
Routing
X'80'
X'40'
X'20'
X'10'
codes:
Local RSCS console
Remote addressee
Local user
Local VM/370 operator
No response text is returned.
Appendix C. RSCS Request Elements
303
BUILT BY:
Assembly of DMTSYS at RSCS generation
FUNCTION:
Record allocation status of switch able line ports available te RSCS
DESCRIPTION:
The first double word of the table is reserved for control information.
Each following halfword contains the virtual device address of a line Fort
which may be dialed, and which is available to RSCS.
o
Nu.ber of Line Port Entries
in Table
4
8
Virtual Line Address
Virtual Line Address
C
Virtual Line Address
Virtual Line Address
Virtual Line Address
Virtual Line Address
10
OPERATIONAL NOTES
The line pert entries are
entries to 1's.
304
marked "in use"
by setting the
IBM VM/370 Data Areas and Control Block Logic
high-order feur bits
of the
BUILT BY:
DftTNPT, DMTSML
FUNCTION:
Terminate line driver task
DESCRIPTION:
This request element is passed via GIVE/TAKE to the REX task, to terminate
line driver operation in response to a tRAIN command.
o
r
I
I
,
Length
(1)
Function
Code: X'03'
OPERATIONAL NOTES
Tbere are no error conditions for the terminate function, so no response is made.
However, line driver tasks must issue a WAIT request following a call to GIVE fer
terminate, because REX may not execute the request immediately.
Appendix C. RSCS Request Elements
305
306
IBM VM/370 Data Areas and Control Block Logic
Appendix D.
This Appendix contains Assembler
reference data for:
language
equate
eMS Equate Symbols
symbols
used in
eMS
to
• eMS usage
• eMS registers
Appendix D. eMS Equate Symbols
307
~~~ ~~!§~ ~Q~!IES
Field
Nalle
Field Description, Contents, Meaning
].!ts .9~!.!1l~.9 .!.!! !he f!gg!~!
CHANO
EQU
X'SO'
CHAN1
EQU
X'40'
CHAN2
EQU
X'20'
CHAN3
EQU
X'10'
CHAN4
EQU
X'OS'
CHANS
EQU
X'04'
CHANM
EQU
X'02'
EXTM
EQU
X'01'
~!~!y§
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
!grd (PSW)
00 - channel a mask
01 - channel 1 mask
02 - channel 2 mask
03 - channel 3 mask
04 - channel 4 mask
OS - channel S mask
06 - input/output mask
07 - external mask
BCMM
MCKM
WAIT
PROB
EQO
EQO
EQU
EQO
X'OS'
X'04'
X'02'
X'01'
Bit
Bit
Bit
Bit
12
13
14
1S
-
extended control mode mask
machine check mask
wait state mask
problem state mask
FOFM
DOFM
EOFM
SIGM
EQU
EQO
EQU
EQU
X'OS'
X'04'
X'02'
X' 01'
Bit
Bit
Bit
Bit
36
37
3S
39
-
fixed-point overflow mask
decimal overflow mask
exponent under flew mask
significance Ilask
].!ts
ATTN
SM
COE
BOSY
CE
DE
O_C
OE
.9~!in~.Q
EQO
EQU
EQO
EQU
EQU
EQU
EQJ}
EQU
1!! !he
EQU
EQU
EQU
EQO
EQU
EQU
EQU
EQU
PCI
ICL
PGC
PTC
CtC
CCC
ICC
CHC
~.Qn2.!! ~l!gj1'!!~.!
WRITE
READ
NOP
SENSE
WRDATA
RtDATA
SEEK
TIC
WRITE1
RDCONS
SETSEC
SEARCH
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
X'SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
~l!~~.!!~1
X'SO'
X'40'
X'20'
X'10'
X'OS'
X'04'
X'02'
X'01'
Status Word (CS!)
-"BIt-32-=- attention
Bit 33 - status lIodifier
Bit 34 - control onit end
Bit 3S - busy
Bit 36 - channel end
Bit 37 - device end
.BJ1:.3S - unit .ch.eck
Bit 39 - unit exception
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
40
41
42
43
44
4S
46
47
- program-centrolled interropt
incorrect length
- program check
- protection check
- channel data check
- channel centrol check
- interface control check
- chaining check
-
Command
x'Oi'-X'02'
X'03'
X'04'
X'OS'
X'06'
X'07'
X'OS'
X'09'
X'OA'
X'23'
X'31'
Write
Read
No operation
Sense
Write data
Read data
Seek
Transfer in channel
Write and space 1
Read from console
Set sector
Search ID equal
~.!ts .9~!.!'!!~.9
CD
CC
SILl
SKIP
PCIF
IDA
308
in a Channel Command Word (££!)
EQU --x'SO'----- ----BIt 32-= chain data
EQU
Bit 33 - comlland chain
X'40'
EQU
Bit 34 - suppress incorrect length
X'20'
EQU
X'10'
Bit 3S - suppress data transfer
EQU
Bit 36 - cause program control interrupt
X'OS'
EQU
X'04'
Bit 37 - indirect data address
IBM VM/370 Data Areas and Control Block Logic
~~.§ 1!~§ISI~1! E;2J!!TE~
Field
Name
General
RO----
Rl
R2
R3
R4
R5
R6
R7
RS
R9
Rl0
Ri 1
R12
R13
R14
R15
Field Description, Contents, Meaning
EYf£~§~ !~g!§!~!§
EQU
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQU
EQO
EQO
EQO
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
!.!oat.!.n.9-~.!.n! !~g.!§!~!§
FO
F2
F4
F6
EQU
EQO
EQO
EQO
o
2
4
6
Extended control
CO----EQU---O
Cl
C2
C3
C4
C5
C6
C7
CS
C9
C10
Cll
e12
C13
C14
C15
EQO
EQO
EQU
EQO
EQO
EQO
EQU
EQO
EQO
EQO
EQO
EQO
EQO
EQO
EQO
reg!§!~!§
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Appendix D. CMS Equate Symbols
309
310
IBM VM/370 Data Areas and Centrol Block Logic
Appendix E.
Data Areas and Control Block References
This appendix -- a listing of CF, CMS,
following:
and R5CS control blocks -- contains the
•
Module references to data areas and control blocks.
•
Information on
released.
how certain
data areas
or control
blocks are
created and
Appendix E. Data Areas and Control Block References
311
CCHREC
ACCTBLOK
~yi!1 ~Y:
~gilt
DftKHVD
!~!~gsed ~Y:
Rel~g2~g
DMKHVD, DMKUSO
R~!~E~~£~g ~y:
DftKACO, DMKCKP,
DMKSPL
DKKHVD,
Qy: DMKCCH, DftKIOE, DftKIOF
B~f~~~g
Qy:
DMKCCH, DMKEIG,
DftKSEV,
DftKSII
CCPARft
ACNTBLOK
~gilt ~y:
DMKACO, DMKHVD, DMKWRft
~ui!1 ~:
R~!~gsed ~Y:
DftKNLD, DftKSNC
]~!~2~g ~~:
DftKACO
QY: DftKACO, DMKCKP,
DftKJRL, DftKRSE, DMKWRM
~ef~E~~g
DftKNLD, DftKSNC
DKKHVD,
CHIBLOK
ALOCBLOK
~Yi!1
QY: DftKCCH
hY: DftKCPI, DMKVDC
~uilt ~Y:
QY: DftKCPI, DMKVDC
R~!~~g
Ref~~~g
QY:
DMKCPI, DftKftON,
Bel~~g
DKKPGT,
DMKTDK, DftKVDC
DftKDIA
Qj: DftKVCl
Bef~£ed Qy:
DftKVC1, DftKVSI
DftKDIA,
CHYBLOK
BSCBLOK
~ui!1 ~:
~uilt
DftKRGB
R~!~gsed ~y:
Qy: DftKDIl
Bel~2gg
DMKRGA
R~!~E~~g ~y:
DMKBSC, DftKRGA, DKKRGB
Qy: DMKVCA
]~fgEgn£ed
QY: DftKDIA, DftKVCA
CKPBLOK
BUFFER
~Yi!1
~y:
DMKCFM,
DMKCPI,
DKKERM,
DftKGRF, DMKLNK, DMKLOG, DMKRGA, DMKRSP
lluilt
~y:
DftKRNH
Rel~gg ~y:
R~!~g2~g
~y:
DMKCFM,
DftKLNK, DMKRGA, DMKRSP
Re!~Een£~g
DMKCFM,
DMKCSB,
DMKCSU,
DMKGRT,
DMKRND,
DftKWRM
DftKCFP, DftKCQG,
QY:
DMKCFO,
DMKCSO,
DMKCSV,
DMKLNK,
DMKRSP,
DMKCPI,
DMKALG, DMKCDM,
DMKCFS, DMKCPI,
DMKCSP, DMKCSQ,
DMKEMA, DMKERM,
DMKMSG, DMKNMT,
DMKSCN, DMKUDU,
DMKGRF,
R~fer~~£ed
DKKCFG,
DMKCPS,
DMKCST,
DMKGRF,
DMKRGA,
DMKVDC,
DftKRNH
£y: DftKRNH, DftKWRft
CONTASK
DftKGRF,
QI: DftKCNS,
DftKRGA, DMKRGB, DftKRNH
~ui!1
R~1~g2~g
DftKQCN,
QY: N/A
R~fgE~n£ed ~I:
DMKCNS, DftKGRF. DMKMON,
DftKNES, DMKQCN, DMKRGA, DftKRGB, DftKRNH
312
IBM VM/370 Data Areas and Control Block Logic
CORTABLE
DKPKYREC
Assembled in DMKSYS.
~uilt
£y: DKKDKP
~£!~aseQ
_________
Referenced _.L.
b~?:
DMKCCW, DMKCDS,
DMKCPV, DMKDGD,
DMKMCH, DMKKNI,
DKKPTR, DMKRPA,
DKKVMA
DMKACO,
DKKCFO,
DKKDKP,
DKKPAG,
DKKUDR,
DMKATS,
DKKCPI,
DMKFRE,
DKKPGS,
DKKUDU,
121: DMKDKP
DMKBLD,
DMKCPU,
DMKMCC,
DKKPSA,
DMKUNT,
DHPTBREC
~uilt
12y: DMKDMP
!!el£~§~Q
£y: DMKDMP
CPEXBLOK
£Y!1i
~£f~£~~££Q
121.:
DKKACO,
DMKDIA,
DMKIOS,
DMKPGT,
DMKRNH,
DMKUSO,
DMKVKC
DMKCDS,
DKKGRF,
DKKLOC,
DKKPTR,
DMKRPA,
DMKVCA,
£y:
!!el~~sed
DKKCFK,
DMKIOE,
DKKKCC,
DKKQCN,
DKKRSP,
DMKVDC,
DMKCPS,
DMKCPS,
DMKIOF,
DMKMCH,
DMKRGA,
DMKSPL,
DMKVDE,
DMKDSP,
DMKCPV,
DMKIOG,
DMKKON,
DKKRGB,
DMKSVC,
DMKVMA,
DMKIOF,
DKKMON, DMKPTR
!!~f~£~£~
DMKCDS,
DKKCPB,
DKKDIA,
DMKGIO,
DMKLNK,
DMKMCT,
DMKPAG;
DMKPSA,
DMKRNH,
DKKSTK,
DMKUNT,
DKKVDC,
gy:
DMKCFK,
DMKCPS,
DMKDSB,
DMKGRF,
DMKLOC,
DMKMIA,
DKKPGS;
DKKPTR,
DKKRPA,
DMKSVC,
DKKUSO,
DMKVD3,
DMKACO, DMKALG,
DKKCFO, DMKCFP,
DMKCPU, DMKCPV,
DMKDSP, DMKEXT,
DMKIOE, DKKIOF,
DMKMCC, DMKMCD,
DKKKID, DKKKNI,
DMKPGT ff DKKPRG ff
DMKQCN, DKKRGA,
DMKRSP, DMKSPL,
DMKTAP, DKKTMR,
DMKVAT, DKKVCA,
DMKVKA, DKKVMC,
DMKCCW,
DKKCNS,
DMKDGD,
DKKFRE,
DMKIOS,
DMKMCH,
DMKMON,
DMKPRV,
DMKRGB,
DMKSSS,
DKKTRD,
DKKVDA,
DKKVSI,
£y: DMKDMP
ECBLOK
~ui!~
£y: DMKBLD
12y: DMKELD, DMKCDB,
DMKCFG, DftKCFH, DMKCFP,
DftKEXT, DMKPRG, DMKPRV,
DMKTKR, DMKTRC, DftKTRD,
DI1KVKC
~£f~£~£~Q
DMKCDS,
DMKDSP,
DftKSVC,
DftKVAT,
DMKCDft,
DMKCFS,
DMKSCH,
DMKUSO,
ERRBLOK
~.l!il~
£y: DMKIOE
!!£l£~§£~
gy:
DKKIOF
£y: DKKIOE, DMKIOF
!!£f£££~££~
DMKVSP
IOBLOK
DDRREC
~.l!!1~
£y: DKKVER
R£l£~seg
gy: DKKVER
!!ef~£en£~Q
!!y!lt
DMKCNS,
DMKCSP,
DMKGRF,
DMKRGB,
DMKVDD,
DMPINREC
gy: DKKDMP
R~l~~sed
DMKCFP,
DMKCSO,
DMKGIO,
DMKRGA,
DftKVDC,
DMKCFP, DftKCNS,
DKKCSO, DMKDAS,
D8KGRF, DKKHVC,
DMKPAG, DKKRGA,
DKKSEF, DMKTDK,
DMKVDE, DftKVIO
DKKCPB,
DKKDGD,
DKKIOS,
DKKRGB,
DftKV CA,
DKKACO, DftKBSC,
DMKCNS, DMKCPB,
DMKCSC, DMKCSP,
DMKDGD, DMKDIA,
DKKGIO, DMKGRF,
DMKIOS, DMKISM,
DMKftON, DMKftSW,
DMKPGT, DKKRGA,
DftKCCH,
DMKCPI,
DMKCSU,
DMKDIB,
DMKHVC,
DMKLOG,
DMKNLD,
DMKRGB,
£y: DKKVER
R£l£~§~Q
~.l!!lt
DMKCCW,
DMKACO,
DMKCPB, DMKCPI, DMKCPS,
DMKCSU, DMKDGD, DMKDIA,
DMKHVC, DKKIOS, DMKNLD,
DftKSPL, DKKTDK, DKKVCA,
DKKVDE, DKKVDR, DKKVIO
£y:
£y: DKKDKP
DKKCPI,
DMKDIA,
DMKMON,
DKKRNH,
DKKVDC,
£y:
DMKCPS,
DKKGIO,
DMKNLD,
DKKRSP,
DMKVDD,
~£fer£~£ed
DMKCCW,
DMKCPS,
DKKCSV,
DMKDSB,
DMKIOE,
DMKMCC,
DHKNLE,
£y:
DMKCFP,
DKKCSB,
DKKDAS,
DMKDSP,
DMKIOG,
DMKftNI,
DMKPAG,
Appendix E. Data Areas and Control Block References
313
DMKRNH,
DMKSSS,
DMKTRC,
DMKUSO,
DMKVDR,
DMKRSE,
DMKSTK,
DMKTRD,
DMKVCA,
DHKVIO,
DMKRSP,
DMKTAP,
DMKTRK,
DMKVDC,
DMKVSI
DMKSEP,
DMKTCS,
DMKUDR,
DMKVDD,
DMKSPL,
DMKTDK,
DMKUNT,
DMKVDE,
MCRECORD
j1uilt QY: DMKMCH
gel~~~~
!U: N/A
gef~£~B£ed ~Y:
DMKMCH
IOERBLOK
~ui!~
~Y:
DMKBSC,
DMKCCH,
DMKDAS,
DMKDIA, DMKDIB, DMKIOE, DMKIOS, DMKRSE,
DMKTAP, DMKVCA
~~!~~2£g
DMKCFP,
DMKDIA,
DMKIOS,
DMKRNH,
~Y:
DMKCNS,
DMKDIB,
DMKMON,
DMKRSE,
DMKBSC, DMKCCH, DMKCCW,
DMKCPS, DMKDAS, DMKDGD,
DMKGIO, DMKGRF, DMKIOE,
DMKNLD, DMKRGA, DMKRGB,
DMKRSR, DMKTAP, DMKVIO
R~!~£§!f~g ~y:
DMKCFP,
DMKDIA,
DMKGRF,
DMKNLD,
DMKRSE,
DMKTRK,
DMKVIO,
DMKCNS,
DMKDIB,
DMKIOE,
DMKNLE,
DMKRSP,
DMKUNT,
DMKVSI
DMKBSC, DMKCCH,
DMKCPS, DMKDAS,
DMKDSB, DMKEIG,
DMKIOF, DMKIOS,
DMKRGA, DMKRGB,
DMKSEV, DlUSIX,
DMKVCA, DMKVDC,
DMKCCW,
DMKDGD,
DMKGIO,
DMKMSW,
DMKRNH,
DMKTAP,
DMKVDE,
IRMBLOK
Buil!
MDRREC
j1uilt
!U: DMKVER
Bel~~~
!U: DMKVER
Ref~£~~£~~
QY: DMKIOF, DMKVER
MICBLOK
j1uilt QY: DftKCFS, DMKLOG
Rel~as~~
!U: DMKCFS, DMKLOG, DMKUSO
DMKELD, DMKCFS, DMKDSP,
Refer~~£ed Qy:
DMKLOG, DMKliCH, DMKPTB, DMKBPA, DMKTBA
MIBREC
!U: DMKCFO, DftKCFS
Rel~as~g ~y:
~uili
DftKCFS, DMKIOE
gy:
Beleased
D~KVER
~:
R~f~ren2ed
JPSCBLOK
DMKVER
QY: DMKVER
!!NDEVLST
Assembled as part of DMKSYS
~~!~~~g
DMKLOG
QY:
DMKALG, DMKJRL,
~ui!i
DMKLNK,
QI: DMKENT
Rg!~~§g~
Qy: DMKENT
Rgf~y£~g
QY: DMKENT
LOCKBLOK
MNHDR
j1y!!i QY: DMKLOC
~~!~~§~g
~uil! ~Y:
QY: DMKLOC
Rgl~~§~g
DMKMON
QY: DMKMON
Ref~£~~f~g
QY: DMKMON
MCHAREA
MNOOO
j1y!!~ ~y:
R~!~~§~g
DMKIOG
R~!~£en£~g
QY:
DMKCCH, DMKCFO,
DMKIOG, DMKMCH, DMKMCT
314
~Y!l!
QY: NIA
QI: DMKMON
R~!g~§gQ
DMKCPU,
QY: DMKMON
R!fg£~~£~~
IBM VM/370 Data Areas and Control Block Logic
QI: "DMKMON
MN500
MN001
12~il1
£y: DMKMON
Rglg~§gg
£y: DMKMON
12~ilt
£y: DMKMON
~gl£~§~g
£1: DMKMON
MN600
MN097
12uil! B1: DMKMON, DMKMNI
E!!ili £1: DMKMNI
Rgl~~seg
Relg~§~g
BY: DMKMON
R~!g£g~f~g
£1: DMKMON
HI: DMKMNI
MN602
12!!ilt £y: DMKENT
MN098
~!!ili
HY: DMKMNI
!~l~~§~g
Rg!g~§gg
£y: DMKENT
£y: DMKMON
R~!g£g~f~g
HY: DMKMNI
MN700
12~i!1
MN099
B1: DMKMON
Rg!g~§gg
gy:
DMKMON
12!!il1 QY: DMKMON
MN802
12!!ilt £y: DMKMON
MN10X
Rg!g~gg
~!!ili
Rgl£~§gg
QY: DMKMON
!~!~££~f~g
£y: DMKMON
MONCOM
12~1!!
MN20X
BY: DMKMCC
~g!~§g~
~~ili
21: DMKMON
QY: DMKMON
£y: DMKMON
£1: DMKMON
2Y: DMKCPS, DMKDMP, DMKENT,
DMKMCC, DMKMCD, DMKMIA, DMKMNI, DMKMON
~£!g~g~ced
Relg~~Q
HY: DMKMON
MSSCOM
12uilt £y: DMKSSS
MN400
~!!ili
£y: DMKMON
R£l£~§£g
£y: DMKMON
Rgfg£en£gg £y: DMKMON
]elg~ed
BY:
DMKLNK,
DMKLOG,
DMKSSS,
DMKVDA
BY: DMKCPB, DMKDGD, DMKDSB,
DMKLNK, DMKLOG, DMKMSS, DMKSSS, DMKVDA,
DMKVSI
~~!~~en~g
Appendix E. Data Areas and Control Block References
315
PAGTABLE
NCPTBL
~Y1!i
~ui1i ~y:
£y: DMKSNT
~~1~~2~£
~~!~£~~£~£ ~Y:
£1: DMKBLD, DMKPGS
]~!~~~g
£y: N/A
DMKBLD
QY: DMKATS, DMKBLD, DMKCFG,
DMKCPU, DMKPGS, DMKPTR, DMKVAT, DMKVMA
]ef~~~~£~£
DMKNLD, DMKSNC
NICBLOK
PGBLOK
~y11~
QY: DMKNLD
~el~~2~£ ~y:
~uilt ~y:
DMKVAT
DMKNLD
]g1~~2ed ~I:
DMKCFP, DHKDSP
Ref~£~~g ~Y:
DMKACO, DMKBLD, DMKCFT,
DMKCKP, DMKCPI, DMKCQR, DMKDIA, DMKHVD,
DMKLOG, DMKNES, DMKNET, DMKNLD, DMKPSA,
DMKQCN, DMKRGA, DMKRGB, DMKRNH, DMKWRM
Refg£g~£gg
Qj: DMKCFP, DMKDSP, DMKVAT
PSA
Assembled as part of
nucleus.
NPRTBL
Q~!~!!
Bui1i Qy:
]ef~~ced ~y:
R~b~~sed ~Y:
NfA
Ref~£~g ~I:
DMKTCS, DMKWRM
DMKCKS, DMKCSO,
DMKHVD,
OBRRECN (Long OBR)
~uibi
Qy: DMKIOF
R~b~~~
QI: DMKIOF
Rel~£~g~
QY: DMKIOC, DMKIOF, DMKVER
OBRREC (Short OBR)
~yibi ~y:
DMKIOF
Rg1g~~~ ~I:
DMKIOF
OWNDLIST
DMKATS,
DMKCDB,
DMKCFG,
DMKCFS,
DMKCNS,
DMKCPV,
DMKCQY,
DftKCST,
DftKDEF,
DftKDRD,
DftKERM,
DMKGRF,
DMKIOE,
DMKJRL,
DMKLOK,
DMKMI A,
DMKMSW,
DtlKOPR,
DMKPRV,
DMKRGB,
DMKSAV,
DMKSIX,
DMKSTK,
DftKTHI,
DMKTRK,
DMKUSO,
DMKVDA,
DMKVDS,
DMKVMI,
DMKBLD,
DftKCDft,
DMKCFH,
DMKCFT,
DftKCPB,
D!!1{CQG,
DftKCSB,
DMKCSU,
DMKDGD,
DMKDSB,
DMKEXT,
DMKGRT,
DMKIOF,
DMKLNK,
DMKftCC,
DftKMI D,
DMKNES,
DtlKPAG,
DMKPSA,
DMKRNH,
DMKSCH,
DMKSNC,
DMKSVC,
DMKTMR,
DMKTRM,
DftKVAT,
DMKVDC,
DMKVER,
DMKVSI,
DMKACO, DftKALG, DftKAPI,
DftKESC, DftKCCH, DMKCCW,
DftKCDS, DMKCFC, DMKCFD,
DMKCFM, DMKCFO, DftKCFP,
DMKCKP, DMKCKS, DMKCLK,
DMKCPI, DMKCPS, DftKCPU,
D!!KCQH, - -DMKCQP, - DMKCQR,
DMKCSC, DftKCSP, DftKCSQ,
DMKCSV, DMKCVT, DftKDAS,
DftKDIA, DMKDIB, DMKDMP,
DMKDSP, DMKEIG, DMKENT,
DMKFMT, DMKFRE, DMKGIO,
DMKHVC, DMKHVD, DMKIOC,
DMKIOG, DMKIOS, DMKISM,
DMKLOC, DMKLOG, DMKLOH,
DMKMCD, DMKftCH, DMKMCT,
DMKMNI, DMKMON, DMKMSG,
DMKNET, DMKNLD, DMKNLE,
DMKPGS, DMKPGT, DMKPRG,
DMKPTR, DMKQCN, DMKRGA,
DftKRPA, DMKRSE, DMKRSP,
DMKSCN, DMKSEP, DMKSEV,
DMKSPL, DMKSSP, DMKSSS,
DMKTAP, DMKTCS, DMKTDK,
DMKTR1, DMKTRC, DMKTRD,
DMKUDR, DMKUDU, DMKUNT,
DMKVCA, DftKVCH, DMKVCN,
DMKVDD, DMKVDE, DMKVDR,
DMKVIO, DMKVMA, DMKVMC,
DMKVSP, DMKVSQ, DMKWRM
Assembled into DMKSYS
QY: DMKATS, DMKCKP, DMKCKS,
DMKCPI, DMKCPU, DMKDRD, DMKPAG, DMKPGS,
DMKPGT, DMKPTR, DMKSPL, DMKUDR, DMKVDA,
DMKVDC, DMKWRM
~g!~£en£gg
PWDIBLOK
~uilt ~y:
DMKJRL
Rel~~~g ~y:
316
IBM VM/370 Data Areas and Control Block Logic
DMKSYS; part of CP
DMKJRL
RECBLOK
RCHBLOK
Assembled into CP nucleus module DMKRIO
~Yili
£1: DMKCKS,
DMKCPI,
DMKRSP, DMKVSP, DMKWRM
ftgl§!~~g
g~!~Eens:~g
DMKCPB,
DMKDIA,
DMKMNI,
DMKSSP,
11y:
DMKCPI,
DMKDSB,
DMKMON,
DMKSSS,
DMKCCH, DMKCFO,
DMKCPS, DMKCPV,
DMKENT, DMKIOG,
DMKNES, DMKPRV,
DMKVCH, DMKVMT
DMKCKP,
DMKCQP,
DMKIOS,
DMKSCN,
DMKPGT,
12Y: DMKPGT, DMKSPL, DMKUSO
RgfeE§!1!ced IIY: DMKCKP, DMKCKS, DMKCPI,
DMKDMP, DMKPGT, DMKRSP, DMKSPL, DMKVSP,
DMKWRM
RECPAG
RCUBLOK
~Y!l! ~y:
DMKIOF, DMKIOG
Assembled into CP nucleus module DMKRIO.
ftelg~§.~~
gy: DMKIOF, DMKIOG
Rg!gE~1!£§!g
R~!~E~1!£~g
DMKCKP,
DMKCQP,
DMKIOC,
DMKNLD,
DMKVCH
121:
DMKCPB,
DMKDIA,
DMKIOS,
DMKPRV,
DMKCCH, DMKCCW,
DMKCPI, DMKCPS,
DMKDSB, DMKENT,
DMKMNI, DMKMON,
DMKSCN, DMKSSP,
DMKCFO,
DMKCPV,
DMKGRF,
DMKNES,
DMKSSS,
RSPLCTL
~Yil!
QY: DMKRSP
Rg!§!EgQ£ed gy: DMKCKP, DMKCQP,
DMKRSP, DMKSPL, DMKTCS
RCWTASK
~Y!li
QY: DMKIOF, DMKIOG
DMKCSO,
121: DMKCCW
R~l~~~g
121: DMKCCW, DMKUNT
R~!~E~s:~g
SAVEAREA
12Y:
DMKCCW, DMKCFP, DMKCPB,
DMKHVC, DMKIOS, DMKISM, DMKTRD, DMKTRK,
DMKUNT, DMKVDR
liui li £1: DMKCPI, DMKSVC
!!eleas~g,
Built III: Assembled
module DMKRIO
III:
ft§!!§!£~£§!g,
DMKBSC,
DMKCFH,
DMKCKP,
DMKCPS,
DMKCQR,
DMKDEF,
DMKDSB,
DMKHVD,
DMKIOS,
DMKMNI,
DMKNLD,
DMKPGT,
DMKRGA,
DMKSCN,
DMKSSS,
DMKTRM,
DMKVDA,
DMKVDS,
121: DMKACO, DMKALG,
DMKATS, DMKBLD, DMKBSC, DMKCCH,
DMKCDB, DMKCDM, DMKCDS·, DMKCFC,
DEKCFO,
DMKCFG, DMKCFH, DtiKCFE,
DMKCFS, DMKCFT, DMKCKS, DMKCLK,
DMKCPB, DMKCPS, DMKCPU, DMKCPV,
DMKCQH, DMKCQP, DMKCQR, DMKCQY,
DMKCSO, DMKCSP, DMKCSQ, DMKCST,
DMKCSV, DMKDAS, DMKDDR, DMKDEF,
DMKDIA, DMKDIB, DMKDIR, DMKDRD,
DMKEIG, DMKENT, DMKERM, DMKFMT,
DMKGRF, DMKGRT, DMKHVD, DMKIOC,
DMKIOF, DMKIOG, DMKIOS, DMKISM,
DMKLNK, DMKLOG, DMKLOH, DMKMCC,
DMKMCH, DMKMIA, DMKMID, DMKMNI,
DMKMSG, DMKMSW, DMKNEM, DMKNES,
DMKNLD, DMKNLE, DMKPGS, DMKPTR,
DMKRGA, DMKRGB, DMKRNH, DMKRPA,
DMKRSP, DMKSET, DMKSEV, DMKSIX,
DMKSPL, DMKSSP, DMKSSS, DMKSVC,
DMKTCS, DMKTDK, DMKTHI, DMKTRA,
DMKTRD, DMKTRK, DMKTRM, DMKUDR,
DMKUNT, DMKUSO, DMKVAT, DMKVCA,
DMKVDA, DMKVDC, DMKVDD, DMKVDE,
DMKVDS, DMKVER, DMKVMA, DMKVMC,
DMKWRM
.Bg!~I~.!!s:~g
RDEVBLOK
ft§!l§!~§.ed
121: DMKSVC
into
CP
nucleus
N/A
III:
DMKCCH,
DMKCFM,
DMKCKS,
DMKCPU,
DMKCQY,
DMKDGD,
DMKDSP,
DMKIOC,
DMKLNK,
DMKMON,
DMKNLE,
DMKPRV,
DMKRGB,
DMKSEP,
DMKTAP,
DMKUNT,
DMKVDC,
DMKVER,
DMKACO, DMKATS,
DMKCCW, DMKCFC,
DMKCFO, DMKCFP,
DMKCNS, DMKCPB,
DMKCPV, DMKCQG,
DMKCSB, DMKCSO,
DMKDIA, DMKDMP,
DMKENT, DMKGRF,
DMKIOE, DMKIOF,
DMKLOG, DMKLOH,
DMKMSW, DMKNES,
DMKOPR, DMKPAG,
DMKPSA, DMKPTR,
DMKRNH, DMKRSE,
DMKSNC, DMKSPL,
DMKTCS, DMKTDK,
DMKUSO, DMKVCH,
DMKVDD, DMKVDE,
DMKVSI, DMKWRM
DMKBLD,
DMKCFG,
DMKCFT,
DMKCPI,
DMKCQP,
DMKDAS,
DMKDRD,
DMKGRT,
DMKIOG,
DMKMCC,
DMKNET,
DMKPGS,
DMKQCN,
DMKRSP,
DMKSSP,
DMKTRK,
DMKVCN,
DMKVDR,
DMKAPI,
DMKCCW,
DMKCFD,
""UT:1""''t:\T"Io
lJ01\I....£'r,
DMKCNS,
DMKCQG,
DMKCSB,
DMKCSU,
DMKDGD,
DMKDSB,
DMKGIO,
DMKIOE,
DMKJRL,
DMKMCD,
DMKMON,
DMKNET,
DMKQCN,
DMKRSE,
DMKSNC,
DMKTAP,
DMKTRC,
DMKUDU,
DMKVCH,
DMKVDR,
DMKVSP,
Appendix E. Data Areas and Control Block References
317
SAVTABLE
SPLINK
Assembled into CP pageable module DMKSNT
~!!!.li ~y:
B~!~g2~g
N/A
Ql: N/A
Ref~E~n~g ~y:
DMKCKS, DMKCQH, DHKCSU,
DMKDRD, DMKMIA, DMKRSP, DMKSPL, DMKTCS,
DMKVSP, DMKVSQ
SDRBLOK
~~!!i
QY:
QY:
Re!~g~g
SWPTABLE
DMKIOF
R~!~E~~g
~~!lt ~:
DMKIOE
QY:
E~!~g2~g
DMKIOE, DMKIOF
DMKBLD, DMKVMA
QY:
DMKBLD
QY: DMKATS, DMKBLD, DMKCFG,
DMKCPU, DMKPGS, DMKPTR, DMKVAT# DMKVMA
R~fg~~£gQ
SEGTABLE
~~!!i
QY:
DMKBLD
SYSLOCS
QY:
R~!~g2ed
DMKBLD
Assembled into CP nucleus module DMKSYS.
R~!~Een£~g
QY:
DMKATS, DMKBLD,
DMKPGS,
DMKVMA
Referenced QY: DMKACO, DMKBLD, DMKCFO,
DMKCFT, DMKCKP, DMKLOC, DMKLOG, DMKLOH,
DMKUDR, DMKUDU, DMKUSO
SFBLOK
~!!!!!.
QY:
DMKCKS, DMKNLD, DI1KSPL,DKKWRM
QY:
R~!~g2~g
DMKCKS,
DMKRSP,
DMKSPL,
SYSTBL
Assembled into DMKSNT.
DMKUSO
DMKATS, DMKCFG,
!!~f~Een£~g
DMKCQG,
DMKCST,
DMKMIA,
DMKSEP,
DMKVSQ,
QY:
DMKCQR,
DMKCSU,
DMKMNI,
DMKSPL,
DMKWRM
DMKCKP, DMKCKS,
DMKCSO,
DMKCSP,
DMKDMP,
DMKCSV,
DMKNLE,
DMKRSE,
DMKTCS,
DMKUSO,
DMKCPI,
DMKCSQ,
DMKDRD,
DMKRSP,
DMKVSP,
DMKCFH,
TNSREC
~!!!.li
QY:
E~!g~2gQ
DMKIOF
Ql: DMKIOF
SHQBLOK
Bui!i
QY:
R~!~g2~g
DMKCSP, DMKWRM
QY:
DMKCSP
TREXT
Re!~E~£~g
QY:
DMKCKS, DMKCQR,
DMKCSQ,
~~!.!!.
DMKSPL, DMKiRM
QY:
E~!g~§gQ
QY:
g~!~g2~g
DMKCFG
QY:
DMKPGS, DMKVMA
QY: DMKATS, DMKCFG,
DMKCPU, DMKPGS, DMKPTR, DMKVMA
!!~f~E~n£~g
318
Ql: DMKTRA, DMKTRC, DMKUSO
R~f~ren£ed £y:
DMKCFM, DMKDSP, DMKPGS,
DMKPRG, DMKPRV, DMKSVC, DMKTMR, DMKTRA,
DMKTRC, DMKTRD, DMKVIO
SHRTABLE
~~!li
DMKTRA
~MKCFH,
IBM VM/310 Data Areas and Control Block Logic
VCHBLOK
TRQBLOK
~y:
DMKBLD,
DMKCFC,
DMKCFS,
DMKCPI, DMKGRF, DMKLOG, DMKMCC 1 DMKQCN,
DMKRGA
Ey!11
£1: DMKCFM, DMKCFS, DMKDIA,
DMKMCC, DMKLOG, DMKMON, DMKQCN, DMKRGA,
DMKUSO
E~f~£~nf~Q
~Qil1
g§l§g~ed
R~i~£~~~ ~y:
DMKCFM,
DMKDIA,
DMKMCC,
DMKQCN,
DMKTMR,
DMKCFP,
DMKDSP,
DMKMID,
DMKRGA,
DMKUSO
DMKBLD, DMKCDS,
DMKCFS, DMKCPI,
DMKENT, DMKGRF,
DMKMNI, DMKMON,
DMKRGB, DMKSCH,
DMKCFC,
DMKCPU,
DMKLOG,
DMKPSA,
DMKSSS,
~Y:
QY: DMKUSO
gel~£~~g
DMKCPB,
DMKDEF,
DMKLOG,
DMKUSO,
DMKVDD,
DMKVDS
£y:
DMKCPV,
DMKDI A,
DMKPRV,
DMKVCH,
DMKVDS,
DMKCFM; DMKCFP; DMKCKP;
DMKCQG, DMKCSP, DMKCSU,
DMKDSP, DMKCSV, DMKLNK,
DMKSCN, DMKSPL, DMKSSS,
DMKVCN, DMKVDA, DMKVDC,
DMKVIC, DMKVSI, DMKVSP
VCONCTL
~Yil1
QY: DMKVDS
UDBFBLOK
~Y!!1
g~!~£~~g
DMKDEF, DMKHVD, DMKSPL
QY: DMKCFS, DMKDEF, DMKHVD,
DMKLNK, DMKLOG, DMKSPL, DMKSSS, DMKUDR,
DMKUDU
UDEVBLOK
VCUBLOK
~Y!11 ~y:
gef~E~nfed
DMKCPB,
DMKCSV,
DMKNLD,
DMKUSO,
DMK VDD,
QY: DMKCSP, DMKUDR
R~!~£seg
DMKGRF,
QY: DMKDEF, DMKHVD, DMKSPL
R~i~£~f~g
~Y!!i
£y: DMKALG, DMKCFP,
DMKRGA, DMKVCN, DMKVDR
~~f~E~~f~£
gy:
QY: DMKCSP, DMKUDR
DMKVDS
QY:
DMKCPV,
DMKDEF,
DMKPRV,
DMKVCH,
DMKVDS,
DMKCFM, DMKCFP, DMKCKP,
DMKCQG, DMKCSP, DMKCSU,
DMKDIA, DMKDSP, DMKr.OG,
DMKSCN, DMKSPL, DMKSSS,
DMKVCN, DMKVDA, DMKVDC,
DMKVIO, DMKVSI, DMKVSP
QY: DMKDEF, DMKDIR, DMKLNK,
DMKLOG, DMKSCN, DMKUDR, DMKVDA, DMKVDS
R~i~£enf~g
VDEVBLOK
UDIRBLOK
~yi!1
~Yi!1
£y: DMKLOG, DMKVDS
£y: DMKCSP
B~f~E~.!!f~g
QY: DMKCFS, DMKCPI, DMKCSP,
DMKDEF, DMKDIR, DMKHVD, DMKLNK, DMKLOG,
DMKSPL, DMKUDR, DMKUDU
R~i~£~nf~g
UMACBLOK
Bu!!i QY: DMKDIR
DMKCCW,
DMKCKP,
DMKCQP,
DMKCSU,
DMKDIA,
DMKGRF,
DMKLOG,
DMKSCN,
DMKTRD,
DMKVCH,
DMKVDR,
D~KVSP,
QY: DMKCFS, DMKDEF, DMKDIR,
DMKHVD, DMKLOG, DMKSPL, DMKUDR, DMKUDU
QY:
DMKCFG,
DMKCPB,
DMKCSB,
DMKCSV,
DMKDIB,
DMKHVC,
DMKNLD,
DMKSPL,
DMKTRK,
DMKVCN,
DMKVDS,
DMKVSQ
DMKACO, DMKALG,
DMKCFH, DMKCFM,
DMKCPS, DMKCPV,
DMKCSP, DMKCSQ,
DMKDAS, D.MKDEF,
DMKDRD, DMKDSP,
DMKHVD, DMKIOS,
DMKPRV, DMKQCN,
DMKSSS, DMKTHI,
DMKUNT, DMKUSO,
DMKVDA, DMKVDC,
DMKVZB, DMKVIO,
DMKCCH,
DMKCFP,
DMKCQG,
DMKCST,
DMKDGD,
DMK§IO,
DMKLNK,
DMKRGA,
DMKTRC,
D~KV CA,
DMKVDD,
DMKVS I,
g~i~£~~g
VFCBBLOK
~Y!!1 ~y:
DMKCFG, DMKCSO
Appendix E. Data Areas and Control Block References
319
VMCPARM
VMABLOK
~Y!!i
£1: DMKBLD, DMKCFG
~~il! ~y:
R~l~~§gg
g~i~E~Q£gg
QY:
DMKATS, DMKCFG,
Virtual machine user
gy:
Virtual machine user
DMKPGS,
DMKVMA
VRRBLOK
VMBLOK
~~ilt
1!Y!!i
Qy: DMKVDS
DMKBLD
~y:
~gl~~§~g
DMKUSO
Ref~E~Q£~g
DMKATS,
DMKCDM,
DMKCFH,
DMKCFT,
DMKCPI,
DMKCQH,
Dl'.IKCSO,
DMKCSV,
DMKDIB,
DMKEXT,
DMKHVC,
DMKIOS,
DMKLOH,
DMKMCT,
DMKMSG,
DMKNLE,
DMKPRG,
Dl'.IKRGA,
DMKRSP,
DMKSPL,
DMKTHI,
DMKTRK,
DMKVAT,
DMKVDC,
DMKVIO,
DMKVSQ,
DMKBLD,
QY:
R~l~~§~g
QY:
DMKBLD,
DMKCDS,
DMKCFM,
DMKCKP,
DMKCPS,
DMKCQP,
DMKCSP,
DMKDAS,
DMKDRD,
DMKFRE,
DMKHVD,
DMKISM,
DMKLOK,
DMKMIA,
DMKffS1f,
DMKPAG,
'DMKPRV,
DMKRGB,
DMKSCH,
DMKSSS,
DMKTMR,
DMKUDR,
DMKVCA,
DMKVDD,
DMKVMA,
DMKWRM
DMKDIA,
DMKACO, DMKALG,
DMKCCH, DMKCCW,
DMKCFC, DMKCFD,
DMKCFO, DMKCFP,
DMKCKS, DMKCNS,
DMKCPU, DMKCPV,
Dl'.IKCQR, DMKCQY,
DMKCSQ, Dl'.IKCST,
Dl'.IKDEF, DMKDGD,
DMKDSP, DMKENT,
DMKGIO, DMKGRF,
DMKIOE, DMKIOF,
DMKJRL, DMKLNK,
DMKMCC, DMKMCD,
DMKMID, DMKMNI,
DMKNES, DMKNET,
DMKPER, DMKPGS,
DMKPSA, Dl'.IKPTR,
DMKRNH, DMKRPA,
DMKSCN, DMKSEP,
DMKSTK, DMKSVC,
DMKTRA, DMKTRC,
DMKUDU, DMKUNT,
DMKVCH, DMKVCN,
DMKVDR, DMKVDS,
DMKVMC, DMKVSI,
DMKLOG,
QY: DMKVDR
R~!~E~D£~g QY:
DMKCCW, DMKCFP,
DMKGIO, DMKUNT, DMKVDS, DMKVSI
DMKAPI,
DMKCDB,
DMKCFG,
DMKCFS,
DMKCPB,
DMKCQG,
DMKCSB,
DMKCSU,
DMKDIA,
DMKERM,
DMKGRT,
DMKIOG,
DMKLOG,
DMKMCH,
DMKMON,
VSPLCTL
~~ilt ~y:
R~l~~~£
DMKDRD, DMKVSP
gy:
DMKVSP
£y: DMKCKP, DMKCSP.
DMKDRD, DMKSPL, DMKVSP, DMKVSQ
Ref~Qf~g
VSPXBLOK
DMKPGT,
DMKQCN,
DMKRSE,
DMKSNC,
DMKTCS,
DMKTRD,
DMKUSO,
DMKVDA,
DMKVER,
DMKVSP,
1!ui!! Q1: DMKCST
R~1~enfed BY:
DMKCKP, DMKCQG,
DMKCST, DMKSPL, DMKVDB, DMKVDS
BY:
Relea§ed
DMKTMR
£y: DMKVMC
Rel~~§~g
QY: DMKVMC
R~!~E~D£~g
DMKCFP.
DMKDSP.
QY: DMKDSP, DMKVMC
XOBR3211
~~il! ~y:
~y:
N/A
R~!~~~g ~1:
320
R~lg~§~g
N/A
DftKDSP,
DftKSCH,
QY: DMKCFP, DMKCPB, DMKDSP,
DMKGRF. DMKRGA. DMKSCH. DMKTMR, DMKVMC
R~f~£~D£ed
VMCMHDR
1!Y!li
DMKCSP,
XINTBLOK
BY: DMKCFP,
DMKCPB,
DMKGBF, DMKRGA, DMKSCH, DMKTMR
1!~ili
DMKCSQ,
DMKNLD,
~Y!l!
VMCBLOK
DMKDGD,
DMKRSE
Qj: DMKIOE
Rg1~E~n£~g
IBM VM/370 Data Areas and Control Block Logic
QY: DMKIOF, DMKBSE
AETAE
BBOI
Assembled as part of DKSNUC.
~~!~£~~g
Assembled as part of DMSNUC.
QY: DKSBAB, DMSDOS, DMSITP
£y: No CMS references. This
block is used by the DOS supervisor.
~ef~£~gced
ABiSECT
BGCOM
Assembled as part of DKSNUC
Assembled as part of
~~!~£~~Q
QY:
DnSABN, DnSDBG,
DMSITI, DMSITP, DKSITS
DMSNUC~
DMSFRE,
Refe~g£ed
DMSBOP,
DMSDOS,
DMSITP,
DMSQRY,
DMSSTG,
ADTSECT
QY:
D!!SAMS, DMSASN,
DMSDLE, DMSDLK,
DHSFCH,
DMSFET,
DMSOPL,
DMSOPT,
DMSSET, DMSSMN,
DMSICP
DMSCLS,
DMSDSV,
DMSLLU,
DMSRRV,
DMSVSR,
DMSBAB,
DMSDMP,
DMSINS,
DMSPRV,
DMSSRV,
Assembled as part of DKSNUC.
Re!~£~~g
DMSACl1,
Dl1SARX,
DMSBWR,
DMSDLK,
Dl1SEIC,
DMSINS,
DMSLDS,
DMSMVE,
DMSSET,
DMSTRK,
QI:
DMSABN, DMSACC,
DKSARE,
DMSAMS,
DMSASN,
DMSAUD.,
DMSCPY,
DMSDIO,
DKSEDX,
DMSDSL,
DMSFNS,
DMSFOR,
DMSLAF, DMSLBM,
DMSLKD,
DMSLLU,
DMSQRY,
DMSRNM,
DMSSTT,
DMSTPE,
DMSICP
DMSALU,
DMSASM,
DMSCMP,
DMSDSK,
DMSEXT,
DMSLAD,
DMSLFS,
DMSPUN,
DMSSOP,
DMSUPD,
DKSACF,
DMSARN,
DMSBOP,
DMSDLB,
DMSERS,
DMSIFC,
DMSLBT,
DMSLST,
DMSROS,
DMSTQQ,
CMSTAIE
~uil! ~y:
R~!~as~g
DMSSVT
QY: DMSSVT
R~f~£~g£~g
£y:
DMSCIT, DMSITE,
DMSITI,
DMSSVT
CVTSECT
Assembled as part of DMSNUC.
AFTSECT
Assembled as
part of
DMSNUC; also
created and released
dynalllically by
DMSLAF.
DBGSECT
~~!~£~f~g ~y:
DMSBRD, DMSBiR, DMSCPY,
DMSERS, DMSFNS, Dl1SINT, DMSLAF, Dl1SPNT,
DMSRNM, DMSSOP, DMSSTT, DMSTPE
Assembled as part of DMSNUC.
~~!er~nf~g ~I:
DMSDBD, DMSDBG, DMSITE.
!NCHSECT
DEVSECT
~~ili
QY: DMSSTG
Assembled as part of DMSNUC.
R~!~£~~g ~y:
DMSDOS, DMSSTG
DEVTAB
B!TLSECT
Assembled as part of DMSNUC.
Assembled as part of DMSBTP.
£y: DMSASN, DftSDBD,
DMSEDX, DMSINI, DMSLLU, DMSSVT
R~!~renfed
Ref~£~nfgg
QY: DMSCIO, DMSITE, DMSPIO
DMSEDI,
Appendix E. Data Areas and Control Block References
321
FCBSECT
DIOSECT
Assembled as part of DKSNUC.
!!~i11 ~y:
R~!~I~~£~g ~Y:
DMSACM, DMSDIO,
DMSFLD
DMSFNS,
~elgasgg
DMSIl'I
£1: DMSFLD, DMSABN
R~fere~£~£ ~I:
DMSCCB
DMSASM,
DMSMVE,
DMSSBS,
DMSSVN,
!!!!ili QY: NIA
R~1~g§£g
DMSALO, DMSARN,
DMSDSL, DMSFCH, DMSFLD,
DMSQRY, DMSROS, DMSSAB,
DMSSCT, DMSSEE, DMSSOP,
DMSSVT,
DMSARX,
DMSLDS,
DMSSBD,
DMSSQS,
QY: NIA
FCHTAB
Assembled as part of DMSNUC.
DOSSECT
~uili
£y: DMSDLB
R~l~~Q
QY: DMSDLB, DMSABN
FICL
Re!~Ien£~g
£y:
DMSAMS, DMSBOP, DKSCLS,
DMSDLB, DMSDLK, DMSDSV, DMSOPL, DMSQRY,
DMSRRV, DMSSRV, DMSSVT, DMSVIP, DMSXCP
Assembled as part of DMSNUC.
Ref~gn£~g ~I:
No CMS references. This
block is used by the DOS supervisor.
EDCB
!!~ili
QY: DMSEDX
Rel~gsed
FRDSECT
QY: DMSEDI
Re!~I~~g
QY:
DMSEDC, DMSEDI,
Asse.bled as part of DMSNUC.
DMSEDX,
R~f~en~~
QI: DMSFRE, DMSSET
DMSGIO" DMSSCR
FSCBD
ERDSECT
!!~il1
.Qy: N/A
Assembled as part of DMSNUC.
Rgf~ren£ed ~y:
D"SERD, DMSDLK, DMSIFC,
DMSZAP, and user programs that access
the CMS file syste.
EXTSECT
Assembled as part of DMSNUC.
£y: DMSINS, DMSINT, DMSIOW,
DMSITE, DMSQRY, DMSSET, DMSSTG, DMSSVN,
DMSSVT
R~!~I~~£§g
FSTD
!!Yil!
.QI: N/A
R~lgg2gg
£y: NIA
£y: DMSCPY, DMSEDX, DMSEXC,
DMSFNS, DMSGND, DMSNCP, DMSSOP, DMSTPE
R~f~I~n£~~
EXTUAREA
Assembled as part of DMSNUC.
No CMS references.
322
IBM VM/370 Data Areas and Control Block Logic
FSTSECT
LUBPR
~Yilt ~y: DMSACF
!i.§1.§~§.§,Q ~y:
1!.§i.§E.§1l£.§,Q
DMSARX,
DMSCPY,
DMSFNS,
DMSLKD,
DMSUPD,
Assembled as part of DMSNUC
DMSALU
~y:
DMSASM,
DMSDLK,
DMSGND,
DMSMVE,
DMSXCP,
DMSACF~
DMSBOP,
DMSDSK,
DMSIFC,
DMSRNM,
DMSZAP
's.§i,§,E.§l!£.§,Q
DMSAMS,
DMSBRD,
DMSDSL,
DMSLAF,
DMSSTT,
DMSARN,
DM SBWR,
DMSERS,
DMSLBM,
DMSTPE,
~Y:
DMSDLK, DMSDSV
LUBTAB
Assembled as part of DMSNUC.
R.§f.§E.§l!£,§Q ~y: DMSAMS, DMSBOP. DMSCLS,
DMSDLB, DMSFCH, DMS LLU, DMSOPL, DMSPRV,
DMSRRV, DMSSET, DMSSRV, DMSXCP
FVSECT
Assembled as part of DMSNUC ~
li.§i.§E.§l!£,§Q
DMSACM,
DMSBTP,
DMSCWT,
DMSFNS,
DMSITS,
DMSQRY,
DMSTPE,
~y:
DMSALU,
DMSBWR,
DMSDIO,
DMSINT,
DMSLAD,
DMSRNM,
DMSTQQ
NICL
DMSABN, DMSACC,
DMSAUD, DMSBRD,
DMSCIT, DMSCRD,
DMSDOS, DMSDSK,
DMSITE, DMSITI,
DMSLFS, DMSMOD,
DMSSLN, DMSSOP,
DM SACF,
DMSBTB,
DMSCWR,
DMSERS,
DMSITP,
DMSPNT,
DMSSTT,
Assembled as part of DMSNUC.
li~f'§E'§!!£'§Q
QY:
DMSBOP, DMSCLS,
DMSDLB,
DMSLLU, DMSXCP
NUCON
Assembled as part of DMSNUC.
IHADECB
~Yili
R~f'§E'§1!£~Q
hy: N/A
li~!'§2.§.§f!
hy: N/A
li.§i.§E,§!!£,§Q hY:
DMSSBD, DMSSBS,
DMSSCT,
DMSSEB, DMSSVT
IOSECT
Assembled as part of DMSNUC.
E..§i.§E,§!!£,§Q hy:
DMSITI,
DMSABN, DMSHDI,
DMSINT,
DMSITI
KEYSECT
~Y1lt
hY: DMSSVT
R.§!.§~§.§f!
DMSACM,
DMSARX,
DMSBOP,
DMSCAT,
DMSCPF,
DMSDBD,
DMSDMP,
DMSEDI,
DMSEXT,
DMSFOR,
DMSHDI,
DMSINM,
hI: DMSSVT
R.§i.§E.§!!£.§f! hI: DMSSBD, DMSSVT
DMSLBM,
DMSLGT,
DMSLOA,
DMSMOD,
DMSOPT,
DMSPNT,
DMSRDC,
DMSSAB,
DMSSET,
DMSSRT,
DMSSVN,
DMSTPE,
DMSVIP,
£y:
DMSALU,
DMSASM,
DMSBRD,
DMSCIO,
DMSCPY,
DMSDBG,
DMSDOS,
DMSEDX,
DMSFCH,
DMSFRE,
DMSHDS,
DMSINS,
DMSITP,
DMSLBT,
DMSLIB,
DMSLSB,
DMSMVE,
DMSOR1,
DMSPRT,
DMSRNE,
DMSSBS,
DMSSLN,
DMSSRV,
DMSSVT,
DMSTQQ,
DMSVSR,
DMSABN, DMSACC~
DMSAMS, DMSARE,
DMSASN, DMSAUD,
DMSBTE, DMSBTP,
DMSCIT, DMSCLS,
DMSCRD, DMSCWR,
DMSDIO, DMSDLB,
DMSDSK, DMSDSL,
DMSERR, DMSERS,
DMSFET, DMSFLD,
DMSGIO, DMSGLB,
DMSIFC, DMSINA,
DMSINT, DMSIOW,
DMSITS, DMSLAD,
DMSLDR, DMSLDS,
DMSLIC, DMSLKD,
DMSLST, DMSLSY,
DMSNCP, DMSOLD,
DMSOVR, DMSOVS,
DMSPRV, DMSPUN,
DMSRNM, DMSROS,
DMSSCN, DMSSCT,
DMSSMN, DMSSOP,
DMSSSK, DMSSTG,
DMSSYN, DMSTIO,
DMSTYP, DMSUPD,
DMSXCP, DMSZAP
DMS ACF,
DMS ARN,
DMS BAB,
DMS BW R,
DMS CMP,
DMSCWT,
DMSDLK,
DiiSDSV,
DMSEXC,
DMSFNS,
DMSGND,
DMS IN I,
DMSITE,
DcSLAF,
DMSLFS,
DMSLLU,
DMSMDP,
DMSOPL,
DMSPIO,
DMSQRY,
DMSRRV,
DMSS EB,
DMSSQS,
DMSSTT,
DMSTPD,
DMSVIB,
OPSECT
LDRST
Assembled as part of DMSNUC.
Built £1: DMSLDR
E..§l~2.§ed
hy: DMSLDR
Rei.§E.§!!£.§f! hI: DMSLDR, DMSLGT,
DMSLIO, DMSLSB, DMSOLD
DMSLIB,
E.§i.§rel!£.§f! QY:
DMSCPY, DMSCRD,
DMSEXC, DMSEXT,
DMSSBD, DMSSBS,
DMSSQS, DMSSVN,
DMSABN, DMSARX,
DMSCWR, DMSCWT,
DMSINS, DMSINT,
DMSSCT, DMSSEB,
DMSSVT
DMS AS M,
DMS DBG,
DMS ROS,
DMSSOP,
Appendix E. Data Areas and control Block References
323
OSFST
PUBADR
!!y!!!. 12y: DMSROS
!~!~g§~g
Assembled as part of DMSNUC.
12y: DMSALU
~ef~~£ed 121:
DMSBOP, DMSCLS,
DMSDSV, DMSLLU, DMSPRV, DMSXCP
DMSDLK,
12y: DMSABN, DMSALU, DMSBOP,
DMSDLK, DMSFCH, DMSMVE, DMSROS, DMSRRV,
DMSSOP, DMSSRV, DMSSTT
Ref~~~~g
PUBOWNER
Assembled as part of DMSNUC
OVSECT
R~!~~~£ed
!~!~g§~g
121:
DMSBOP, DMSCLS,
DMSDLK,
DMSLLU, DMSXCP
Jiui!!. 121: NIA
121: NIA
!~!~~~~g
121: DMSITS, DMSOVR
SSAVE
!!uilt
~1:
DMSITS
PCTAB
Assembled as part of DMSNUC.
!~f~!:~~£ed
DMSDBG,
DMSFRE,
DMSOVS,
DMSSTG,
!U:
DMSDLB,
DMSIFC,
DMSSAB,
DMSSVN,
DMSABN, DMSACC, DMSBAB,
D8SDOS, DftSERR, DMSFLD,
DMSITP, DMSITS, DMSLDR,
DMSSLN, DMSSMN, DMSSOP,
DMSSVT, DMSVIP, DMSXCP
PDSSECT
Jiui!i £1: DMSSVT
!~!~gsed
SUBSECT
12y: DMSSVT
Assembled as part of DMSNUC.
~ef~!:~nced
PGMSECT
J11: DMSAEN, DMSINM, DMSINT
SVCSECT
Assembled as part of DMSNUC.
Assembled as part of DMSNUC.
Rg!g~~£gg
£1:
DMSSTG, DMSSVT
DMSITP, DMSSAB,
DMSSLN,
PIBADR
SVEARA
Assembled as part of DMSNUC.
Re!~~~£gg
~~fe!:~nced £1:
DMSCIT, DMSFRE, DMSHDS,
DMSINT, DMSITE, DMSITS, DMSLAD, DMSLFS,
DMSQVR, DMSOVS, DMSSLN
£1: DMSBAB, DMSDOS, DMSITP
PIB2TAB
Assembled as part of DMSNUC.
Assembled as part of DMSNUC.
~~fg!:~n£ed
!U: DMSBIB, DMSDOS, DMSITP
SYSCOM
Assembled as part of D8SNUC.
R~fg!:gn£ed £1:
DMSBAB, DMSBOP, DMSDOS,
DMSFET, DMSITP, DMSQRY, DMSSTG, DMSSYN
324
IBM VM/370 Data Areas and Control Block Logic
SYSNAMES
USAVE
Assembled as part of DMSNUC.
!~!~£~Q£ed ~X:
DMSAMS, DMSBOP, DMSBPT,
DMSDOS, DMSEDX, DMSEXC, DMSINS, DMSINT,
DMSITS, DMSQRY, DMSSET, DMSVIB, DMSVSR
TSOBLKS
Assembled as part of DMSNUC.
USERSECT
Assembled as part of DMSNUC.
No CMS references.
Appendix E. Data Areas and Control Block References
325
GIVEE
ASYNE
~Y!!i
~Yi!i
£y: DMTASY
R~!~~§~g
Bgl~~§~Q ~1:
£y: DMTASY, DMTASK
Re!~£~nf~Q
£y:
DMTASY, DMTEXT,
£1: DMTGIV
Refg~nced
DMTIOM,
DMTAKE, DMTASK
£1: DMTAKE, DMTASK, DMTGIV
DMTSIG
IDE
BUFDSECT
~Yi!!
~Yi!i
£y: DMTSML
R~l~~§~g
Rg!~as~Q
£y: DMTSML
R~!~£~~f~Q
DMTIOM
£1: DMTIOM
Bgf~£~~fed
£y: DMTASK, DMTIOM, DMTREX
£1: DMTSML
IOTABLE
COMDSECT
~yi!i
gy:
~Yi!!
Qy: DMTIOM,
DMTREX, DMTSML
£y: DMTCOM
Rel~g§~g ~1:
N/A
Relea2~~
R~!~E~~f~g
£1:
DMTAXS, DMTCMX,
DMTNPT, DMTREX, DMTSML
DMTMGX,
DMTCRE,
DMTNPT,
£1: DMTNPT, DMTSML
Rgf~~nfed £1:
DMTAXS, DMTCMX,
DMTINI, DMTIOM, DMTREX, DMTSML
DMTCRE,
DEVTABLE
~Yili
£y: DMTNPT
R~!~~§~g ~y:
LINKTABL
Assembled
into
DMTSYS
at
system
generation; also built by DMTCMX.
DMTNPT
£1: DMTASY, DMTAXS, DMTCMX,
DMTCOM, DMTCRE, DMTEXT, DMTLAX, DMTMGX,
DMTNPT, DMTREX, DMTSML
R~fg~£~Q
FREEE
~Yi!i
£y: DMTQRQ
R~!g~§~g ~y:
DMTQRQ
REQBLOCK
R~!gE~nf~g
£1: DMTASK, DMTINI, DMTQRQ
~uilt
£1: DMTNPT
Rgl~ea
£1: DMTNPT
GIVE
Rgfg£g~~~
~Yi!i
£y: DMTSML, DMTNPT, DMTAXS, DMTREX
R~l~s§~Q ~y:
R~!~Egn£~g
N/A
£y:
DMTSML, DMTNPT,
DMTAXS,
DMTREX
326
IBM VM/370 Data Areas and Control Block Logic
£1: DMTNPT
ROUTE
TAKE
Assembled in DMTSYS
~uilt
QY: DMTSML, DMTNPT, DMTAXS, DMTREX
liefgf~n£ed
DMTREX
QY:
DoTSML, DMTNPT,
DMTAXS,
SVECTORS
TANKDSEC
Assembled
into
DMTVEC
at
system
generation; resides in the RSCS nucleus.
R~igren£~g
DMTAXS,
DMTEXT,
DMTMGX,
DMTSML,
Q!:
DMTCMX,
DMTGIV,
DMTNPT,
DMTSTO,
DMTAKE, DMT1SK,
DMTCOM, DMTCRE,
DMTIHI, DMTIOM,
DMTQRQ, DMTREX,
DMTSVC, DMTWAT
DMTASY,
DMTDSP,
DMTL1I,
DMTSIG,
~~i!i
QY: DMTSML
~~!g~2gg
Qy: DMTSML
TARE!
TAG
Assembled into each task module.
Built
~Y:
DKTAXS
Re!~~sed ~!:
~gig£~~g
DMTAXS
QI:
DMTAXS, DMTCMX,
DMTNPT,
Bgfg£gn£gg QY: DMTAKE, DMTASK, DMTASY,
DMTCOM, DMTCRE, DMTDSP, DMTEXT, DMTGIV,
DMTIOM, DMTREX, DMTSIG, DMTSTO, DMTSVC
DMTSML
TASKE
TAGAREA
~~i!i
QY: DMTASK
QY: DMTAKE, DMTASK, DMTASY,
DMTAXS, DMTCOM, DMTDSF, DMTEXT, DMTGIV,
DHTINI, DMTIOM, DMTNPT, DMTPST, DMTREX,
ggi~£gn£gg
nM~~T~
~~~~~~,
nM~~MT
~~~~~~,
nM~~~~
~~~u~~,
nM~~V~
~U~W.~I
nM~U.~
uu~nA~
TCTDSECT
~~i!i
QY: DMTSML
g~!~~2~g
ay: DMTSML
Appendix E. Data Areas and Control Block References
327
328
IBM VM/370 Data Areas and Control Block Logic
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Department 058, Building 706-2
PO Box 390
Poughkeepsie, New York 12602
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Attn: VM/370 Publications
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International Business Machines Corporation
Data Processing Division
1133 Westchester Avenue, White Plains, N.Y. 10604
IBM World Trade Americas/Far East Corporation
Town of Mount Pleasant, Route 9, North Tarrytown, N.Y., U.S.A. 10591
IBM World Trade Europe/Middle East/Africa Corporation
360 Hamilton Avenue, White Plains, N.Y., U.S.A. 10601
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