70C 944YT 40_8804_Unisys_A12 40 8804 Unisys A12

70C-944YT-40_8804_Unisys_A12 70C-944YT-40_8804_Unisys_A12

User Manual: 70C-944YT-40_8804_Unisys_A12

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70C-944YT-401
Computers

Unisys A 12
MANAGEMENT SUMMARY
Unisys has added the A 12E to its A 12
Series of general-purpose mainframes. The
A 12E lowers the entry-level price for the
Unisys large-scale systems over the previously released A 12 model. The A 12 systems are field-upgradable to the A 15 and
A 1 7, increasing processing power nearly
13 times. The A 12 models are object-code
compatible with all other systems in the
A Series family. They feature a distributed
architecture and are supported by the MasterControlProgram/AdvancedSystem(MCP/
AS) operating system.

UPDATE: Unisys streamlined its line ofA Series computers with the addition of the A 12E and the A 17 mainframes. The A Series now includes the A 1, A 4, and A 6
"smallframes" (which replaced the A 2, A 3, and A 5); the
A lOX Models (the A 9 is no longer actively marketed); the
A 12 systems; the A 15X Models; and the new A 17 Systems. Performance power for the A Series ranges from 1.0
for the single-processor A 1 to 144.0 for the four-processor
A 17N. The A 12E is the new entry point into the largescale A Series family. The A 12E is field upgradable to the
A 12, A 15, or the A 17. Unisys has reduced purchase prices
for the A 12 and the A 15, providing an economic incentive
for users wishing to upgrade to the larger systems. Kits to
upgrade the A 12E to the A 12 or to the A 15 are available
right now. The A 12 upgrade to the A 17F will be shipped
in May 1988.
The A 12 is a general-purpose data processing system and
can serve as a centralized processing hub, a distributed
processing node, a program development system, or a
disaster recovery system. The midsized A 12 is the most
compact of the large-scale A Series mainframes. The Central Processor, the Memory Storage Unit with 24 megabytes to 144 megabytes of main memory, the Memory
Control, and the Host Data Unit are housed in a single,
air-cooled cabinet occupying less than 10 square feet. Using a pipeline, look-ahead architecture, the five processors
in the central processor module (CPM) work concurrently,
overlapping many processing steps. This provides the
high-speed system throughput necessary for on-line transaction processing (OLTP) and remote applications. The

MODELS: A 12E and A 12.
CONFIGURATION: The A 12E and A 12 are
single-processor systems with from 24 to
144 megabytes of main memory, expandable in 24-megabyte increments. The I/O
system contains 12 to 48 Data Link Processors, which are responsible for information
transfer.
COMPETITION: Amdahl 580, Honeywell
Bull DPS 88, IBM 308X and 3090.
PRICE: The purchase price for a basic
A 12E is $795,000, and the basic A 12 is
priced at $1,304,000.

CHARACTERISTICS

MANUFACTURER: Unisys Corporation, P.O. Box 500,
Blue Bell, Pennsylvania 19424. Telephone (215) 542-4011. ~

The Unisys A 12 system consists of
two. single-processor models, offering pipeline architecture for increased efficiency and greater
throughput. Main memory capacity ranges from 24 megabytes to
144 megabytes, expandable in 24megabyte increments. The A 12 is
object-code compatible with all the
A Series mainframes and is fieldupgradable to the A 15 and A 17.

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Unisys A 12
I> internal design of the CPM places specific emphasis on
optimizing the execution of scientific-oriented work loads.
To further enhance system performance, the microprogrammable Host Data Unit services I/O queues independently from the CPM, freeing the central processor to
execute user work. The Data Link Processors (DLPs) also
reduce the burden on the CPM by performing all peripheral-dependent functions.
The optional Software Disk Cache utility, originally introduced for the A 12 and A 15, is now available on the
A 12E. Software Disk Cache ensures that data is directly
accessible from main memory rather than disk by designating a complement of main system memory as a disk
cache unit. Fast information access is particularly important in a transaction processing environment. According
to the vendor, a 40 percent increase in performance is
average; some internal benchmark tests showed an even
higher percentage.

Canada: Unisys Canada, 2001 Sheppard Avenue East,
North York, Ontario M2J 4Z7. Telephone (416) 495-0515.
MODELS: Unisys A 12E and A 12.

DATA FORMATS
BASIC UNIT: sixty-bit word consisting of forty-eight data
bits, four control bits, and eight error correcting bits.
FIXED-POINT OPERANDS: Each single-precision integer operand occupies one word and consists of a 6-bit octal
exponent with sign and a 39-bit fraction with sign. Each
double-precision operand occupies two words and consists
of a IS-bit octal exponent with sign and a 78-bit fraction
with sign. String operands may consist of a variable number of four-, six-, seven-, or eight-bit characters.
FLOATING-POINT OPERANDS: Integer and floatingpoint operands have the same format and may be freely
combined in arithmetic operations.
INSTRUCTIONS: One to twelve eight-bit syllables in
length. Syllables are packed six to a program word and
executed sequentially left to right.

Software Disk Cache is especially advantageous for users
whose major applications evolve around transaction processing, such as banks, brokerage houses, hotel chains, and
airlines.

INTERNAL CODE: Eight-bit EBCDIC is standard. Information coded in ASCII (the primary data communications code) can also be processed.

COMPETITIVE POSITION

MAIN MEMORY

With only a moderate (6 percent) increase in mainframe
sales predicted for this year, vendors must review marketing strategies for their large-scale, general-purpose computers. The two fastest-growing segments of the computer
market are scientific computing and on-line transaction
processing (OLTP). Scientific processors and OLTP systems can be independent or linked to a mainframe. Because regular OLTP systems do not have the large storage
capacity of general-purpose mainframes, applications requiring a large data base, such as airline reservation systems, are still based on U nisys or IBM mainframes.
Unisys also considers the financial services industry a key
market. The vendor hopes to expand its presence in this
market from document processing to the other banking
areas. Unisys will face stiff opposition from IBM, which
has the biggest installed base, followed by NCR, the specialist in small banking systems. However, with the recent
acquisition of Timeplex, the wide area network vendor,
Unisys will be in a good position to challenge IBM for
contracts with the bigger banking institutions worldwide.
Timeplex' Tl and packet-switching technology will provide those institutions with the ability to link all their
branch offices located in different areas. The large-scale
A Series, with its high availability, large main memory,
and unique software features (Disk Cache, Memory Disk,
and Mirror Disk), provides the fast access demanded in a
transaction processing environment.
Unisys introduced the A 12E to provide a smoother upgrade path and plug a performance gap in the midsection
of its A Series product lineup. The A 12E is rated at 66
percent of the A 12's performance. Competitors in the
same performance range with the A 12 systems include
the IBM 4381 Model 24 and the 3090 Model 150E, the I>

The Memory Subsystem consists of a Memory Storage
Unit (MSU) and a Memory Control (Me). The Memory
Control provides the processor interface to the memory
subsystem, which contains from one to six memory storage
boards. Main memory is based on 2S6K-bit Dynamic RAM
(DRAM) chip technology and is expandable in 24-megabyte increments, from a base of 24 megabytes to a maximum of 144 megabytes. The Memory Control contains a
purgeless cache mechanism that extends the memory system to the requestors' caches, allowing only one master of
the data referenced by a memory address to exist in the
system. If the original is in main memory, the requestors
may have copies in their caches. The copies cannot be
modified by the requestor. The MC accepts jobs from, and
initiates jobs to, its requestors to cause selective blocks of
data to migrate back to memory from the requestors'
caches. This eliminates the need to periodically purge the
cache to maintain accuracy of main memory. Data will
reside in a requestor's cache until it is displaced by more
recently needed data or is required by another requestor.
The Requestor Interface Modules (RIMs) provide all the
logic required to interface a requestor (Central Processor,
Host Data Unit) to the memory system. The RIM contains
the cache control tables and data storage for uncompleted
store operations. The Storage Interface Modules (SIMs)
provide the interface between the memory control and the
storage units.
STORAGE TYPE: 256K-bit Dynamic RAM Single Inline
Package (SIP) storage boards.
CAPACITY: For memory capacity of the A 12, refer to
Table 1.
CYCLE TIME: Not available from the vendor.
CHECKING: Logic in the Memory Control (MC) performs automatic detection and correction of single-bit errors and detection of multiple-bit errors.
RESERVED STORAGE: Not available on the A 12 models.
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Unisys A 12
TABLE 1. SYSTEM CHARACTERISTICS
MODEL
SYSTEM CHARACTERISTICS
Date announced
Date first delivered
Field upgradable to
Relative performance
Number of processors
Cycle time, nanoseconds
Word size, bits
Operating systems
MAIN MEMORY
Type
Minimum capacity, bytes
Maximum capacity, bytes
Increment size
Cycle time, nanoseconds
BUFFER STORAGE
Minimum capacity
Maximum capacity
Increment size, bytes
INPUT/OUTPUT CONTROL
Number of channels:
Byte multiplexer
Block multiplexer
Word
Other

A 12E

A12

November 1987
November 1987
A 12
11.2*
1
62.5
48
MCP/AS

March 1986
Third quarter 1986
A 15FX
16.8*
1
62.5
48
MCP/AS

256K-bit DRAM
24M
72M
24MB
Not available

256K-bit DRAM
24M
144M
24MB
Not available

30KB
30KB
Not applicable

Not applicable
Not applicable
Not applicable
12 to 48 DLPs

*Based on a relative performance of 1. 0 for the A 1 Model F.

I> Honeywell Bull DPS 88/861, and the Amdahl 5890 Model

. . CENTRAL PROCESSOR

190E. The IBM 4381 has 16 to 64 megabytes of memory
and 12 to 24 I/O channels and costs $890,000. In comparison, the Unisys A 12E with 12 to 72 megabytes ofmemory and 12 to 48 DLPs (channels) costs $795,000. The
3090 Model 150E has 32 to 64 megabytes of memory and
16 to 32 I/O channels and is priced at $1,650,000; the
Honeywell Bull DPS 88/61 with a memory capacity of 32
to 64 megabytes and 64 channels is priced at $1,740,000;
and the Amdahl 5890 Model 190E has 32 to 256 megabytes of memory, 16 to 48 I/O channels, and a price of
$2,625,000. The Unisys A 12 is priced at $1,304,000 and
includes 24 to 144 megabytes of memory and 12 to 48
DLP. A direct comparison is not possible because of the
different architectures, operating systems, and instruction
sets employed by these systems.

The Central Processor Module (CPM) utilizes Very Large
Scale Integration (VLSI), Emitter Coupled Logic (ECL)
gate array technology. Microcode is used as the source of
control for operator execution. The A 12 CPM is part of a
distributed system and is functionally subdivided into the
following five relatively independent submodules that perform concurrent functions:
• Program Control Unit (PCU)
• Reference Unit (RU)
• Execution Unit (EU)
• Write Unit (WU)
• Memory Access Unit (MAU)

ADVANTAGES AND RESTRICTIONS
Operations are distributed through the five concurrent
units, allowing execution order to be determined by resource availability rather than code sequence order.

The A 12 operates under the MCP/AS operating system,
which includes several important products and features.
Among them are Micro View, a micro/mainframe link;
Info View, a multiwindow capability for microcomputers;
and Data-Aid, an information management facility. Memory Disk and Mirror Disk are two of the major features of
the MCP/AS. Memory Disk provides a cost-effective
method to improve performance by using the system's
large main memory as a disk unit. The increase in speed
of memory access over disk access is significant. With
Mirror Disk, realtime data on disk units are duplicated,
increasing data integrity through multiple pack copies.
Critical packs and crucial data base systems are key targets
for mirroring.
The A Series offers one of the widest ranges of object
code-compatible systems in the industry. No program or
APRIL 1988

The Program Control Unit fetches operators from its program cache and translates the operators from the external
machine stack architecture into a three-address operation
for processing by the Reference Unit and the Execution
Unit. These addresses are pointers to locations in the Central Data Buffer, which contains 64 registers. Along with
these addresses, the PCU allocates a job number and
passes other pertinent information necessary to complete
the operation. The job number is used to maintain overall
orderly processing of an operator in the various pipelines of
the Reference Unit and Execution Unit. The Central Data
Buffer locations assigned by the PCU to an operator are
deallocated at the end of the operation.

The Reference Unit uses the operator queues built by the
Program Control Unit and calculates the absolute address
for all data required to perform the operation. It also ~

Unisys A 12

data code conversion is necessary when moving from the
A 1 through the A 17 systems. In addition, the A Series is
object-code compatible with all previous models of the
former Burroughs large-scale computer product line. The
A Series is not compatible with its Unisys stablemate, the
former Sperry 1100 family of mainframes. The two incompatible product lines will be merged through communications links and fourth-generation language (4GL)
software, primarily for users who have both architectures
installed. Unisys has to protect not only its own huge
investment in the two diverse product lines, but also the
investment of its substantial user base. Unisys will continue to enhance its different mainframe architectures and
operating systems "forever and a day," according to its
Chairman W. Michael Blumenthal. This sounds faintly
reminiscent of the promises the U.S. government made to
the Indians, "as long as the grass grows."
USER REACTION

A food service company in Michigan upgraded from an
A 9F to an A 12 system and rated the ease of expansion as
excellent. The A 12 is used as an organizational system,
supporting over 60 local and 20 remote terminals. Applications include accounting, billing, purchasing, order
processing, inventory, payroll, and personnel records.
Communications are handled by the CP2000 communications processor, and the user is very satisfied with its
performance. The user rated the good to excellent in ease
of operation and reliability of both the mainframe and the
peripherals. Vendor's technical support and maintenance
service were rated fast and efficient.
For more information on user ratings for the Unisys A Series, please refer to Page 70C-OOOEB-I01. 0
~ fetches data from its data cache. If the data is not present
in cache, it will prompt the Memory Access Unit to provide
the data from the main memory via the cache.
The Execution Unit performs all arithmetic and logic operations on data from the preallocated locations in the Central Data Buffer. The results of an Execution Unit
operation may either be stored in the Central Buffer registers or sent to cache memory and the Write Unit.
The Write Unit logic provides and manages a buffer for
storing data from the Execution Unit before sending it to
the Reference Unit for storage in the data cache. This
action minimizes the impact on the Execution Unit of operators that perform write operations.
The Memory Access Unit is pipelined and can handle up to
eight separate active requests simultaneously; it can also
process returns concurrently. The MAU performs nonlocal
references, memory control initiated purges, and return operations. It also handles system message traffic and system
interrupts.
SPECIAL FEATURES: The Maintenance Subsystem is
housed in its own cabinet and consists of integrated error
detection and fault isolation units, dedicated Host Maintenance Controllers (HMCs) for error logging and mainframe data access, the System Maintenance Station (SMS
II), and the ET2160 intelligent workstation functioning as
the System Control/Maintenance Diagnostic Processor (SC/

MDP). The System Maintenance Station executes hardware diagnostics and test routines, monitors all A 12
cabinets, and is responsible for system configuration and
initialization. It allows remote access to all maintenance
functions and remote hardware or system software support
through an RS-232 remote support link. The Maintenance
Subsystem includes two 85M-byte disk drives, a quarterinch streaming tape drive, and a 5 th-inch diskette drive.
PHYSICAL SPECIFICATIONS: The dimensions for the
A 12 cabinets are listed in the following chart.
A 12E and A 12

Width Ht. Depth Wt.
(in.) (in.) (in.) (lb.)

Processor/Memory Cabinet 43.7
I/O Cabinets (each)
29.0
System Maintenance Station 29.0

69
44
44

31.7
29.0
29.0

1,000
450
300

The three cabinets occupy 27 square feet of floor space and
have a power consumption of 16.2 kVA. Heat to air output
is 49,600 Btu per hour.

CONFIGURATION RULES
A basic A 12 configuration consists of one central processor module; a memory storage unit containing 24 megabytes of memory (expandable in 24-megabyte increments,
up to 72 megabytes for the A 12E and 144 megabytes. for
the A 12); twoto eight independent I/O cabinets, each with
two I/O base modules supporting from 12 to 48 Data Link
Processors (DLPs); a' system maintenance station; one
ET2160 SC/MDP maintenance terminal; two Line Expansion Modules (LEMs); one T27 operator display terminal
(ODT); one operator console DLP-3; and one ODT adapter
for additional ETllOO operator display terminals.

INPUT/OUTPUT CONTROL
The Host Data Unit (HDU) located in the processor/
memory cabinet provides the interface between main memory and the independent I/O cabinets through two
Message Level Interfaces (MLIs). Each Message Level
Interface connects to an I/O base module in the I/O cabinet. The I/O base modules contain a series of specialized
microprocessor-based Data Link Processors (DLPs).
These units control the transfer of information to and from
the peripheral subsystem, thereby relieving the central processor of that responsibility.
The Data Link Processors are also responsible for information transfer to and from memory via the Message Level
Interface. Each type of peripheral subsystem has its own
specialized DLP. Some DLPs (such as those for disk·
drives) can service multiple peripheral devices of the same
type. In operation, a DLP receives a request for an I/O
data transfer from the central processor via the Message
Level Interface. Some DLPs will accept multiple I/O message requests and queue them for processing. The DLP
then initiates the peripheral-dependent functions required
to perform the I/O transfer, independent of the central
system. Each DLP includes local memory that is used to
buffer the data transfer operations.

MASS STORAGE
For information on mass storage devices for the A 12, refer
to Table 2.

INPUT/OUTPUT UNITS
For information on magnetic tape units and printers used
with the A 12, refer to Table 3.
~

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Unisys A12
~

TERMINALS
For information on terminals used with the A 12, refer to
Table 4.

COMMUNICATIONS
The A 12 Data Communications Subsystem allows a modular approach to the design of small, medium, and large
data communications networks. It includes the Data Communications DLP (DCDLP) with four communications
lines for the configuration of entry-level data communications networks. For more extensive data communications
requirements, the A 12 supports Network Support Processors (NSPs). Local Area Networks and Wide Area Networks can also be implemented with the Integrated
Communications Processor DLP (ICPDLP), Communications Processor Local Area Network (CPLAN), CP2000
Communications Processor, and Burroughs Nt>twork Architecture (BNA II).
The NSP is a programmable front-end processor that
serves as the central element of the communications subsystem; it contains 512K bytes of integrated circuit memory.
Interaction between the NSP and the central system is
performed at the message level, eli~inating the need to
interrupt the central system each time a character or word
of data is to be transferred.
The NSP handles subsystem control, data link control, and
line discipline control functions. Subsystem control includes control of data links and stations, information transfer, and network recorifiguration. Data link control involves
tracking logical status of communications lines; making
and breaking connections on switched lines; first-level recovery; and determining which line-protocol function is to
be performed next and, on multipoint lines, for which station. Station control includes keeping track of the ready/
not ready and enabled/disabled conditions for input status
of stations on a communications line, device control for
properly formatting output display, and· handling user options.
The information transfer function includes translating between logical station addresses, transmitting output messages to stations, forwarding input messages from stations
to the central system, and performing application-dependent editing upon both output and input messages on a
per-station basis. The network reconfiguration function allows an installation to assign, remove, or swap stations or
communications lines, permitting dynamic network revisions as the environment changes.
The LSPs are a series of specialized microprocessors that
provide the connection between the Line Adapters and the
NSP. Information is transferred between the ISP and the
NSP at the message level, reducing NSP interruptions and
allowing more information to be transferred at a time. A
single Line Support Processor can support up to 16 half- or
full-duplex communications lines with subbroadband
speeds of up to 19.2K bits per second (bps). A special
version of the LSP is available for .installations requiring
S6K. bps transmission speeds. This specialized LSP services a single 56K Line Adapter and supports transmission
rates of 56K bps. The same configuration flexibility available with NSPs is available with LSPs. Multiple communications paths can be activated through the use of MCP/
AS operator console commands.
A Quad Line Adapter (QLA) provides the electrical interface between the LSP and each communications line. The
QLA maintains physical control of the line, accumulates
characters, and transfers them to or from the LSP. Each
APRIL 1988

QLA includes 4K bytes of local memory for storing of
translation tables, message buffers, line parameters, polling sequences, and the code required to control the communications line and line discipline.
The QLAs are packaged in sets of four. Each set accommodates the electrical interfaces for four lines and can be
specified as either character oriented or bit oriented. Most
communications protocols use character-oriented transmission; Burroughs Network Architecture (BNA II) uses bitoriented transmission. For each line position within a
QLA, one of three types of electrical interfaces must be
specified: RS-232, for U.S. modem connection; CCITT
V.24, for international modem connection; or TDI/20, for
direct connection. Different electrical interfaces can be intermixed within the same QLA, and character- and bitoriented QLAs can be intermixed on the same LSP. Each
LSP accommodates up to four Quad Line Adapters and up
to 16 lines.
The CP2000 Communications Processor connects to the
A 12 through the Integrated Communications Processor
(ICP) and can be used as a front-end processor. When
placed in a remote location, the CP2000 performs as a
concentrator or controller. Together with the enhanced
BNA II Network Services software, the communications
processor provides distributed processing capabilities, control of terminal networks, and gateways which allow
Unisys mainframes to communicate with IBM systems
through SNA networks.

SOFTWARE
The Source System Software Facility for the A 12 includes
the Master Control Program/Advanced System (MCP /
AS) operating system, Microcode, Utilities, an Algol compiler, a DC Algol compiler, Work Flow Language (WFL),
Menu Assisted Resource Control (MARC), and Cross Reference Symbolic.
OPERATING SYSTEM: The Master Control Programj
Advanced System (MCPjAS), designed to support the advanced architecture of the A Series family of computers, is
the operating system used by the A 12. The operating system software consists of a group of routines organized in
three-level hierarchical fashion. The fllSt level is a kernel
routine that fields all interrupt signals and transfers control to the appropriate MCP/ AS routines. The second-level
routines handle the dynamic resource allocation of main
memory, disk storage, I/O devices, processors, and time
among the concurrently operating programs. The thirdlevel routines handle utility functions such as job scheduling, control card interpretation, file control, library
maintenance, etc.
Jobs are submitted to the operating system through the
Operator Display Terminal (ODT) and/or the system input. units. As the .control statements for each task are
analyzed, a partial stack is created on a schedule queue
containing the estimated main· memory requirements, the
priority, the maximum amount of processing time and I/O
time, the size and location of the file parameter block, the
working storage stack size, and the size and location of
code segments. The program scheduling priority ordinarily
is specified by the programmer, although a default option
automatically assigns a priority job one-half the maximum
allowable priority.
The operating system maintains a queue of jobs available
for initiation. A scheduling routine evaluates resource and
priority requirements. of the programs in the queue and
schedules their execution so as to utilize the system's resources efficiently in a multiprogramming mode. The job ~

70C-944YT-406
Computers

Unisys A 12
TABLE 2. MASS STORAGE
MODEL
Cabinets per subsystem
HDAs per cabinet
Capacity per HDA
Average seek time, msec.
Average access time, msec.
Average rotational delay, msec.
Data transfer rate
Controller model
Comments

Multi-Disk8-2j4

B 9494-101

B 9494-105

B 9494-12

B 9494-24

2
2 to 4 Winchester
250MB formatted
18
26.3
8.3
2.4MB per sec.
Storage Module Device interface

2 to 8
2 fixed
1084MB formatted
21.7
30
8.3
1.2MB per sec.
B 9387-51C,
B 9387-52C
Requires A 304-91
DLP-3

2 to 8
2 fixed
962MB formatted
13.7
22
8.3
1.2MB per sec.
B 9387-51C,
B 9387-52C
Requires A 304-91
DLP-3

1 to 8
1 fixed
868MB formatted
16
24.3
8.3
3MB per sec.
B 9389, B 9399

1 to 8
2 fixed
1736MB formatted
17
25.3
8.3
3MB per sec.
B 9389, B 9399

Requires A 304-91
DLP-3

sequence is dynamically rescheduled whenever a high-priority job is introduced into the schedule. When the required
resources are available (for example, when a job completes
processing or suspends itself to await completion of an
input/output operation), an available job with the highest
priority is added to the processing mix. Jobs submitted
from remote terminals are interpreted and entered into the
schedule queue and are added to the multiprogramming
mix in much the same way as batch jobs.
The operating system controls tasks through the use of
stacks, descriptors, and tables that summarize the history
and current status of each task in process. A stack is
created for each job in the system to provide storage for
basic program and data references. When a task is activated, four high-speed registers are linked to the task's
stack memory area. In addition, an area of high-speed local
memory is available to contain additional portions of the
active stack, for fast access. The contents of the top-ofstack registers are maintained automatically by the central
processor hardware according to the requirements of the
executing program. Central processors can handle multiple
active stacks organized into a tree structure. The treestructured organization allows program code and program
data and variables to be described at different stack levels,
thus permitting program code to be reentrant and shared.
The tree-structured stack also enables a single task to split
itself into two independent tasks by establishing a new link
on the stack to make full use of a multiprocessor configuration or to multiprogram independent processes.
Both data and program segments are referenced through
descriptors. Segment Descriptors, maintained in a portion
of the stack base known as the Segment Dictionary, are the
basis for the implementation of virtual memory. In contrast
to the fixed-page concept utilized in many storage allocation schemes, programs can be divided into variable-length
segments, which are brought into main memory only as
they are needed. In MCP/ AS, Segment Descriptors contain a length field, an Actual Segment Descriptor (ASD)
number field, and a touched bit. The length field specifies
the length of the code segment in words. The touched bit
indicates the status of the ASD number field. If the
touched bit is on, the ASD number field points to an ASD
table entry, and the ASD table entry points to the code
segment in memory or on disk. If the touched bit is off, the
code segment is on disk and has never been referenced.
A Data Descriptor fetches data to the stack or stores data
in a storage area outside the stack. The Data Descriptors
contain a length or index field, ASD number field, touched
bit, copy bit, indexed bit, and size field. The size field
indicates the size of the data items in the data segment.
The index bit indicates the status of the length or index
field. If the index bit is on, the length or index field is an
index. The touched bit indicates the status of the ASD
number field. If the touched bit is on, the ASD number
field points to an ASD table entry. The ASD table entry
points to the data segment in memory or on disk. If the

touched bit is off, the data segment has never been referenced by the program. If the copy bit is off, it specifies that
the data descriptor is the original descriptor for a data
segment.
The Actual Segment Descriptor (ASD) memory management provides monolithic memory management of memory
sizes up to 72 megabytes on the A 12E and 144 megabytes
on the A 12. The ASD table is an area in memory which
can contain up to 1 million entries. Each entry in this table
is a multiple-word structure. The operating system will
initially allocate an ASD table of a size that is proportional
to the amount of main memory. The ASD Operator Display Terminal command allows the operator to display the
size of the table and the maximum number of entries used,
as well as to change the size of the table.
The ability to change the size of the ASD table assures the
user that the table is large enough for the work load, but
not so large as to waste memory. The ASD table contains
an entry for each code or data segment which has been
touched. A touch will occur on the first reference to the
code or data segment. At that time, the MCP/ AS operating
system will allocate an entry in the ASD table. An entry in
the ASD table contains an address field and a presence bit.
The presence bit indicates the status of the address field. If
the presence bit is on, the data or code segment is in
memory and the address field contains a 32-bit physical
memory address. If the presence bit is off, the data or code
segment is on disk and the address field contains the
record number of the item in the overlay or code file.
With ASD memory management, when an area of physical
memory is overlaid, all data and segment descriptors point
to a common descriptor, the ASD; a bit maintained in the
ASD entry specifies whether or not the segment has been
altered. The segment will only be written to disk if it has
been altered.
True dynamic memory allocation is a feature of the operating system. The compilers automatically divide all object
programs into logical, relocatable segments. Moreover, all
object programs are reentrant. Because code is never modified during execution, two or more jobs can concurrently
make use of a single program segment residing in main
memory. Program and data segments are automatically
transferred from disk storage to main memory when
needed. When necessary, the operating system automatically overlays these new segments over other program or
data segments that have not been accessed recently.
Memory protection is provided by a combination of hardware and software features. Two registers associated with
the stack mechanism, the Base of Stack register and the
Stack Limit register, define the lower and upper limits of
the stack. An interrupt is generated if an attempt is made
to exceed these limits. When an element in a data array is
referenced, an automatic comparison of the index value of ~

APRIL 1988

70C-944YT -407
Computers

Unisys A'12
TABLE 3. INPUT/OUTPUT UNITS
Magnetic
Tape Units

B 9495-82
B 9495-83
B 9495-24
B 9495-32
B 9495-33
BT3244
BT3266
BT3288

Printers

B 9246-6
B 9246-12
B 9246-24
~

Number
of Tracks

Recording
Density,
Bits/Inch

Encoding

Tape Speed,
Inches/Sec.

Transfer
Rate,
Bytes/Sec.

9
9
9
9
9
9
9
9
9
9
9
9
9
9

1600
1600
1600
6250
1600
6250
1600
6250
1600
6250
1600
6250
1600
6250

PE
PE
PE
GCR
PE
GCR
PE
GCR
PE
GCR
PE
GCR
PE
GCR

75
125
200
200
75
75
125
125
75
75
125
125
200
200

120,000
200,000
320,000
1,250,000
120,000
470,000
200,000
780,000
120,000
470,000
200,000
780,000
320,000
1,250,000

Printing
Speed

Print
Positions

Horizontal
Spacing,
Chars./lnch

Vertical
Spacing,
Lines/Inch

Form
Size,
Inches

650lpm
1,2501pm
2,0001pm

132
132
132

10
10
10

6 or 8
6 or 8
6 or 8

4 to 20
4 to 20
4 to 20

the data element and the length of the data area, as specified in the Data Descriptor, identifies any attempt by a
program to reference beyond its designated data area. In
addition, control bits in each word prevent a user program
from altering program segments, data descriptors, segment
descriptors, memory links, control words, and tables maintained by the operating system.
The MCPI AS provides comprehensive input/output and
file control facilities. Whenever possible, peripheral devices are automatically assigned to symbolic files to minimize operator intervention. Three tables are maintained by
the operating system, containing label equation and file
attribute information such as the access type, peripheral
type, physical unit being used, etc. This allows modification of file specifications at program execution time. Blocking, buffering, label checking, and other standard I/O
control functions are performed in accordance with the
programmer's specifications. Magnetic tape drives or disk
files can be freely used as backup or "pseudo" devices for
card readers, punches, and printers. This makes it unnecessary to delay the processing of a job because of the
nonavaiiability of a particular I/O unit.
Communications between the system operator and the operating system is accomplished through a combination of
CRT display units, keyboards, control statements, and a
comprehensive system log. The status of the system and of
the jobs in progress is presented on the CRT displays.
Messages and requests can be keyed by the operator, and
the system responses are displayed on the CRT.
Jobs are usually submitted to the system in the form of a
set of control statements accompanied by a source language
deck, or alternatively through control statements entered
through the console keyboard if the programs have previously been compiled and stored on disk. Jobs to be compiled must be accompanied by a compile statement
identifying the compiler to be used and specifying one of
three types of compilations: compile and execute, compile
for the library, or compile for the syntax. Optional control
statements for all jobs contain an execution statement, process time statement, priority statement, and I/O statements
which associate file labels with specific input/output devices.

APRIL 1988

The Menu Assisted Resource Control (MARC) module has
been enhanced under MCPI AS to provide a more flexible
system. The MARC module offers menu assistance for all
system operations. Complete on-line help and teach information is available. A direct interface allows a user to
define, create, and name commands to be executed by
MARC. Products and features such as PrintS and ReprintS are supported by MARC.
Work Flow Management is an MCP/AS facility that provides enhanced capabilities for the control of task initiation
and resource allocation. The Work Flow LIlnguage (WFL)
enables users to describe each job as a network of interrelated tasks. The WFL compiler accepts these control statements as input and generates machine code to control the
tasks within each job as the user prescribes. Facilities
provided by the Work Flow Management System include
sequencing and synchronizing related tasks via input from
control statements, improved consistency in task restarts
after system failures, job summary printouts, multiple job
scheduling queues for different levels of service, interfaces
for installation-tailored system control programs, and accounting records grouped by job. WFL has been enhanced
with the Print statement, providing a batch interface to the
PrintS and ReprintS system.
PrintS is integrated with the MCP/AS and provides routing and scheduling of files for printing and controls when
and where to print. Printer backup file control descriptors
maintain the number of copies to be printed by destination
and handle the file after printing. Several descriptors control the presentation of printed files in terms of forms,
banners, and transformation of data. ReprintS extends
these PrintS facilities to remote printers.
Memory Disk is a major feature of the MCP/ AS operating
system. With Memory Disk, some portion of the system's
main memory can be used as a disk unit. Up to two units of
Memory Disk can be specified as a family or as individual
units. Each unit is declared in terms of pages, with 768K
bytes per page. Up to 80 pages are possible per unit, or a
total of 120 megabytes for two units. Each unit must be
identified as a unique peripheral unit and will be treated as
a disk. From 3 megabytes up to 120 megabytes of memory
can be specified as disk, and files from any disk unit can be ,.."""",.
copied to the Memory Disk units.
~

1QC.. I44vr..40'
Cc)mpLiters

Unisys A.12
~

Mirror Disk is the ,parallel functioning of two to four disks
where aU the units are exact copies of each other. This
feature is an extension of the MCP/ AS operating system.
Critical operations, key object program packs, and data
base systems should be mirrored. Each pack can be copied
up to three times, with each pack family and each of its
copies constituting a mirrored set. On-line creation of mirrors is allowed while still providing acces.s to the master
pack. An audit trail is maintained to identify which areas
have already been copied, are to be copied, and are in the
process of being copied. At the completion of the mirror
creation, a recopy of updated areas will take place to ensure the mirrored copy is brought up to the level of the
master. Members of a mirrored set residing off-line are
audited and updated to match the master and then placed
on-line.
Software Disk Cache is an optional utility available for the
A 12. Disk Cache allows frequently or recently accessed
portions of the disk subsystem to reside in main memory.
Access to this memory-resident data takes place at memory
speed, reducing I/O time to almost zero. Disk Cache requires a minimum of 24 megabytes of memory to be allocated to the Software Disk Cache and a separately licensed
operating system module~

and add new records or delete existing records. The DMS
II audit trail captures a record of all data base maintenance
functions to facilitate automatic recovery.
DMS II DB Analyzer gives detailed statistical and descriptive attributes of both the physical and logical data base
implementation. The information is presented by means of
a series of predefined report programs, aiding the user in
determining the efficiency of the current implementation,
changing the structure for increased efficiency, and deciding when reorganization is needed.
DMS II DB Monitor provides realtime monitoring and
control of the status of a DMS II data base. DB Monitor
provides dynamic monitoring of current data base performance statistics such as memory usage, audit trail attributes, sync point/control point frequency, buffers
allocated for each structure, and user counts of the number
of programs accessing the data base and one or more structures within it.

PROGRAMMING LANGUAGES: A wide range of highlevel and interpreter languages are supported, including
API., Algol, Basic, Cobol 68 and 74, Fortran 66 and 77,
Pascal, PL/l, and RPG II.

DM Interpreter is a OMS II facility which expands the
capabilities and control characteristics of DMS II. It provides an interpretive interface to a DMS II data base
permitting non-DMS II languages access to DMS II-man:
aged information. This allows for extended flexibility in a
DMS II environment. It uncouples the application from the
data base and allows data base changes without a corresponding recompilation of the application program in most
cases.

DATA BASE MANAGEMENT: DMS II is a comprehensive Data Base Management System which uses MCP/ AS
facilities for accessing records in the data base to achieve
greater runtime efficiency. Through the operating system
facilities, the DMS II data base can be accessed by applications programs operating in multiple processing environments, such as batch, remote job entry, time-sharing, and
transaction processing. DMS II incorporates a Data and
Structure Definition Language (DASDL) that provides for
the logical description of data in sets or subsets and for
mapping the logical data into physical structures. A variety
of retrieval methods are supported, including indexed sequential, indexed random, and bit vectors. The latter
method creates indices that require small amounts of disk
storage and permit very fast searches.

The Advanced Data Dictionary System (ADDS) is a DMS
extension providing for the centralized definition, storage,
and retrieval of data descriptions. Information about DMS II data base definitions, Cobol 74 file structures, and
SDF screen formats are all stored in the ADDS data base.
Line and page scrolling allow easy browsing of data base
structures and their entities. A security mechanism restricts access to the dictionary contents by assigning an
authorized user code when ADDS is first brought on-line.
Tracking of Cobol 74 programs is optionally enforced by
the Dictionary Administrator. If enforced, all Cobol 74
programs must have a valid ADDS program name identified in the dictionary. A set of report programs provide
on-line support and store the specifications of printed reports for future viewing and modification.

DMS II permits multiple indices to be established for
accessing a file, and each file can be accessed by any of the
available access methods to provide retrieval of information
by different applications programs. User-language interfaces to the data management system are provided for the
Cobol, Algol, RPG, and PL/l languages. When multiple
programs are accessing the data base, DMS II provides
lockout protection at the record level to prevent simultaneous updating of a record. DMS II recovery capabilities
include the ability to audit transactions as they are referenced or added to the data base and a checkpoint/restart
capability. A recovery utility is automatically initiated by
the operating system in the event of system failure to effect
recovery of the data base and the restart of applications
programs. In addition, DMS II permits the data base to be
dumped concurrently with updates to the files, so that
dumps correspond to the current audit trail.

Extended Retrieval with Graphic Output (ERGO) is an
enhanced inquiry and reporting system used to access
DMS II data bases and conventional files defined in the
Advanced Data Dictionary System. ERGO offers a graphic
representation of information and defines the relationships
between data sets and powerful selection expressions to
fIlter the data used in reports. ERGO features a prompt
mode and Help commands to guide the user. Multiple
presentation formats allow the user to select the most appropriate graphic output representation.

DMS Inquiry is an optional extension of DMS II and
provides an easy-to~use language that enables non-EDP
personnel to access the data base via remote terminals.
Users can "browse" through information stored in the data
base and retrieve it either serially or randomly, without the
delays normally associated . with programming and debugging an inquiry program. Users with appropriate security
clearances can also update information in the data base

Data-Aid is a new, interactive, menu-driven system complemented by on-line Help and Teach. If a new data base is
to be described, Data-Aid transfers the user to ADDS.
Data-Aid monitors the generation of the data base software
modules and the data base initialization, then transfers the
user to ERGO to load the data base through the ERGO
update capabilities and report against it. On request, DataAid will initiate and track the Dump, Copy, and Recovery
functions of the data base.
For more information on DMS II, please refer to Page
SW2S-944YT-401 in Volume 3.
DATA MANAGEMENT: The InjoExec is based on semantic data model technology and consists of an integrated ~

APRIL 1988

70C·9UV1 .409
Computer.

Unisys A,12
TABLE 4. TERMINALS
MODEL
DISPLAY PARAMETERS
Max. chars./screen
Screen size (lines x chars.)
Symbol formation
Character phosphor
Total colors/no. simult. displayed
KEYBOARD PARAMETERS
Style
Character /code set
Detachable
Program function keys
OTHER FEATURES
Buffer capacity
Tilt/swivel
Graphics capability
TERMINAL INTERFACE

ET 1100

T27

826

B38

2,080
24 x 80
7 x 9 dot matrix
P39 green
Not applicable

1,920
24x 80
7 x 9 dot matrix
P39 green
Not applicable

2,240
29 x 80
9 x 12 dot matrix
White
Not applicable

2,240
29 x 80
9 x 12 dot matrix
P31 green
Not applicable

Typewriter
128 ASCII
Standard
10

Typewriter
128 ASCII
Standard
12

Typewriter
128 ASCII
Standard
10

512KB
Standard
None
RS-232-C, TDI

None
Standard
None
RS-232-C, TDI

512KB
Standard
Optional
RS-232-C, RS-422,
Centronics parallel

1MB
Standard
Optional
RS-232-C, RS-422,
Centronics parallel

~ family of products. The InfoExec components required to

establish a functional data base include ADDS, DMS II,
and Semantic Information Manager (SIM).
SIM manages all physical aspects of the data base, providing data independence for programs. Data independence
allows the structure of a SIM data base to be changed
without affecting the programs that access it, thereby minimizing the impact of any physical data base change. SIM
provides full referential integrity, a particular type of logical consistency, in information contained in the data base.
It ensures that relationships are correctly maintained when
data items are changed. SIM also enforces data base security at several levels, including a user's ability to access,
create, update, and delete data.

A SIM data base is defined and controlled by ADDS. Data
dictionary support provides a menu-assisted method of describing the data base, eliminating the need for a complex,
syntax-oriented data definition language. All ADDS menus
are complemented with on-line Help and Teach information to assist users.
The Operations Control Manager (OCM) provides administrative support for operations procedures such as data
base archiving and reorganization.
The InfoExec series incorporates two inquiry and reporting
facilities. The Interactive Query Facility (IQF) for conventional terminals permits authorized individuals to access
and update the data base. IQF allows extensive control
over report formats. Specified information can be extracted
from the data base and transferred to a personal computer
for analysis and update. Inquiries and reports are formulated interactively through menu guidance and report
painting. All IQF updates to the data base are automatically subjected to the integrity and security constraints
managed by SIM to prevent invalid information to corrupt
the data base.
The Workstation Query Facility (WQF) for intelligent
workstations is supported on Unisys PCs, B 2S workstations, or IBM pes to assist users in formulating reports.
Information is supplied by the mainframe and the workstation functions as a user interface, with pop-up and pulldown menus, function keys, mouse support, and graphics
serving as guides.
DATA COMMUNICATIONS: The special-purpose programming tool Network Definition Language II (NDL II)
APRIL 1988

enables users to define and generate customized NSP control programs for data communications applications. These
programs equip the NSP to handle line disciplines, buffer
management, message queuing, auditing, and supervision
of the flow of messages between user-coded programs and
remote terminals. This enables the user's application programs to deal with remote terminals in the same manner as
with conventional, on-site peripheral devices. IBM data
communications algorithms allow Burroughs networks to
interface to non-Burroughs terminals utilizing 3270 and
2780/3780 protocols. The IBM 3270 protocol supports
both terminals and printers compatible with the IBM 3270
bisynchronous protocol for DLP-based systems. A pointto-point bisynchronous algorithm enables DLP-based
A Series systems to support communications to IBM 2780/
3780 RJE terminal devices.
The Interactive Datacomm Conjigurator (IDC) is an extensive tool to aid in the on-line development, implementation, and maintenance of data communications. It provides
a menu-driven interface to configure the data communications subsystem from a workstation or the operator display
terminal. The terminal network configuration can be
changed dynamically without interruption to the network.
A new enhancement enables the IDC to convert NDL to
NDLII.
The Generali:.ed Message Control System (Gemcos) generates an installation-defined Message Control System
(MCS) that manages a transaction-oriented communications network, provides security, handles transaction routing, controls message formatting, and provides a
transaction processing interface for applications programs.
All transaction terminals in the network are controlled by
the Gemcos-created MCS and interfaced to the applications programs and the data base. Gemcos enables users to
develop transaction processing applications programs independently of the network environment. The input to
Gemcos is coded in the Transaction Control Language, a
descriptive, free-form language that uses keywords to describe both the network environment and the requirements
for message routing, message formats, access control, and
recovery.
The Communication Management System (Coms) is an
advanced communications monitor facility. Coms provides
most of the features offered by Gemcos and enables users
to develop transaction programs independently of the network environment. Corns supports direct windows, providing multiple views of the system, and allows Cobol 74
programs to communicate with it. Verification of messages .......
received by a terminal are confmned back to the direct ~

REPRODUCTION PROHIBITED

70C-944YT -410
Computers

Unisys A. '12
~

window. Programs communicate dynamically over a modem with a station. This dial-out capability is flexible and
easy to use within an application program.
The Command and Edit (Cande) program enables multiple
users at remote terminals to create programs or data files,
compile and execute programs, edit and alter programs or
files, search files, send messages to other terminals, and
perform a variety of other functions. Files created through
Cande can be saved and used later by the same user or by
other users to whom access is granted. Cande provides the
capability to develop and test programs remotely in an
on-line environment concurrently with the execution of applications programs. It also provides effective control of the
access, security, and charging functions in a computer timesharing network.

Remote lob Entry (RIE) enables users at remote batch
terminals to enter jobs into the computer system in the
same manner as if they were on-site in the computer room.
RJE allows files to be transferred between remote systems
and enables terminals attached to remote systems to be
controlled by the host system.
Burroughs Network Architecture (BNA) software is designed to enhance the interaction of terminals with host
CPUs in a network environment. BNA is also designed to
facilitate a move into distributed data processing. Through
the BNA architecture, processors and terminals can be
granted access to data bases throughout a network. Job
tasks and information files can be transferred from one
point to another, and data processing resources available in
a network can be shared among participants regardless of
location.
BNA works with existing Unisys terminal networks and
with the Global Memory multiprocessing facility available
on the vendor's large-scale processors. BNA depends on
logical links rather than physical links, relying on network
tables maintained in the host processor for routing. All
routing is through host mainframes.
Services provided by BNA include those designated host
and those designated network. Host services include coordination of communications between tasks being executed
at various hosts; control of the creation, update, and transfer of data from host to host; and handling of communications with logical points within the network. Network
services perform message routing, linking hosts using the
Burroughs Data Link Control (BDLC) bit-oriented protocol. Network services also connect Unisys processors to
packet-switching services using X.25 procedures. Links can
also be established to non-Unisys machines using software
such as NDL II.
PROGRAM DEVELOPMENT: The LtJgic and In/ormation Network Compiler II (Linc II) is a fourth-generation
programming language which generates complete on-line,
realtime systems, including programs, data base descriptions, screen formats, transaction management, and network management. Where possible, the Linc II Interactive
System utilizes menu and checklist formats to provide user
guidance in the development process. The central menu is
referred to as the Activities Menu and provides access to
all areas within the Interactive System. All documentation
for Linc II will be available on-line in the Line II Interactive System.
The Linc II Data Dictionary facility provides a new level of
project control for the user when developing Linc II applications; it allows the user to specify common data items
and their characteristics to ensure consistency whenever

those data items are used in Linc II-developed applications. There are two levels within the Data Dictionary
facility. The Global level is for data items to be used across
multiple Linc II applications, and the Local level is for
single Linc II applications.
Using Linc II, all screen and report formats are built
through an interactive painting process. This process permits a screen or report format to be developed and displayed without requiring a generation, but a generation is
still required to put the form into production. The Line
II-enhanced generation process, using the interactive syntax checking and screen and report painting features, will
significantly reduce the previous Line generation times as
well as the number of generations necessary to create the
production version. The Line II Logic Editor is used to
enter the specifications for global logic, global setup, data
items, keywords, profiles, teach/help text for a screen format, and all types of on-line and report logic. Linc II
command syntax convention is still required by the Linc II
Editor. As a page of logic is entered and the screen is
transmitted, the Editor will verify all information for syntax errors and return the page with any errors highlighted.
Temporary memory areas can be defined within the Editor
to allow the user to store commonly used logic. Up to nine
temporary memory areas can be used, with each area allowing 23 lines of stored logic.
The Query Mode facility allows a user to perform generalized interrogations about a Linc II application specification. Essentially, Query provides a higher level ''where
used" capability, which aids the user in remembering particular naming conventions devised for a Line II application.
The Test and Debug System (TADS) is an interactive,
source-level debugging tool supporting Cobol 74, Fortran
77, and Algol. The debugging code is generated at compilation time and is evoked when the application program is
executed with the TADS option set. Program execution will
terminate at the initiation of a conditional or unconditional
breakpoint specified by the programmer via T ADS. Data is
then displayed and modified as appropriate, and the execution of the program can continue.
For more information on Line II, please refer to Page
SWl5-944YT-401 in Volume 3.
UTILITIES: The Master Control Program includes a variety of utility routines that perform functions such as system resource management, data transcription, library
maintenance, and system log analysis. Also included are a
multilingual system and an intelligent printer support facility. The System Log program accumulates statistics relating to the execution of programs, the number of file
openings and closings, and data on system operation such
as halt/load information, time/date changes, the amount of
system overhead, and operator input messages. Errors detected during system operation are stored in a Maintenance
Log that includes descriptor errors, invalid memory address errors, I/O errors, violations of memory protection,
parity errors, and write lockout errors.
OTHER SOFTWARE: The Intelligent Distributed Editor
(IDE) supports the Fortran 77, Cobol 74, and Algol languages and offers source file editing and text editing extensions. IDE is available in two versions. In the fllSt version,
functions are performed on the host s'ystem and interaction
is achieved via a standard display terminal. The second
version runs under Infoview II on an intelligent workstation, off-loading much of the mainframe overhead associated with editing into the workstation, thus balancing .....
resource utilization between these processing units.
~

APRIL 1988

70C-944YT-411
Computers

Unisys A" '1 2
~

Reporter III is a report writer designed to simplify the
retrieval, analysis, and reporting of information maintained
in computer files. Reporter III accepts report specifications
coded in a free-form report description language and generates a Cobol program tailored to produce the required
report. The system can retrieve input data from multiple
files and/or DMS II data bases, select data based on a
wide range of criteria, perform arithmetic and statistical
functions, sort data in ascending or descending order according to multiple keys, control access through a password system, produce automatically formatted reports, and
create one or more files of extracted data for subsequent
processing or reporting.
In addition to the basic version, Reporter III is available in
an Advanced version, an Audit version, and an On-Line
version. Advanced Reporter III adds the capabilities for
generation of multiple reports in one pass through the
input data, creation of summary-only (matrix) reports, and
controlled formatting for special reports or preprinted
forms. Audit Reporter extends the Reporter III system by
providing auditors with effective software tools for testing
and evaluating the records produced by an EDP system.
The On-Line Reporter is an optional module that can be
added to any of the three preceding systems to provide an
on-line mode of operation that enables users at remote
terminals to enter, generate, compile, and execute report
programs.
The Screen Design Facility (SDF) features both screen
painting facilities and data entry functions such as field
verification, status checking, required field, and many
more. An extended inquiry capability displays all form
libraries defined in the SDF indexed file or the ADDS
dictionary.
The Transaction Processing System (TPS) provides the
framework and methodology for implementing an application system for high-volume, on-line transaction processing. TPS synchronizes data base and input message
recovery and centralizes, formalizes, and simplifies, message interfaces and user programming. It also provides an
interface to access remote data bases using the BNA network.

Infoview II manages the interconnection of intelligent
workstations including the B 25 and ET2000 with the
A Series host mainframe. Up to five windows can be assigned using Unisys MT terminal emulation. One of these
windows can be used to run an application program under
the workstation native mode. Native mode for Infoview II
will function under MS-DOS on an ET2000 or under
BTOS on a B 25. Infoview II manipulates the window
environment with the keyboard arrow keys or a mouse
device. To further control the local workstation environment, the commands View, Edit, Repeat, and Write, as well
as a scrolling capability, have been added. Copy and paste
functions support the transfer of text between windows,
allowing for more effective editing when working with multiple source files.

APRIL 1988

PRICING AND SUPPORT
POLICY: The A 12 is available for purchase or lease under a one-year, three-year, or five-year lease agreement.
The standard lease agreement entitles the customer to unlimited use of the equipment and includes full-time equipment maintenance coverage (24 hours a day, 7 days a
week). The standard maintenance agreement for purchased
systems covers maintenance of the equipment for eight
consecutive hours per day Monday through Friday only;
extended maintenance is available at higher rates.
All maintenance charges listed in this report are for
monthly maintenance Metro 1 (city) Plan A.
All lease plans can include purchase options that allow 50
percent of the rental paid during the first 36 months to be
applied toward the purchase price at any time during the
lease period.
SUPPORT: Users can purchase Unisys' Program Product
Service Agreement, which provides various Support Service packages. The availability of a particular service package (PSA) is product dependent. Generally, PSAs provide
ongoing program product service and/or field service. Program product service deals with corrections by the program
product design facility. Field service provides program
product problem identification assistance via telephone and/
or on-site. Five service packages are defined: Software
Product Support (PSA 1), for computers and customers
who will not require on-site program product problem assistance; Extended Software Product Support (PSA 2), for
computers and customers who will require on-site program
product problem assistance; Centralized Software Product
Support (PSA 3), for selected program products where only
telephone service is needed; Software Product Assistance
(PSA 4), for micro and PC products only; and Basic Software Product Support (PSA 5), for certain products for
which telephone and on-call services are not generally
available.
Mainframe computer systems will be supported from a
hardware and operating system (MCP/ AS) standpoint for
at least seven years from date of last manufacture. Reworked, refurbished, and remarketed models are guaranteed support from a hardware and operating system (MCP/
AS) standpoint for a period of five years from date of
delivery. Notification of termination of either hardware or
operating system support, or both, will be provided at least
24 months in advance of such termination. Unisys will
support the current and immediately preceding version of
each major release of the operating system and utilities.
All software is unbundled. Program products for the A 12
are offered under a plan which provides for the use of the
products on a designated system on a month-to-month or
extended basis.
EDUCATION: Users can obtain the necessary training by
paying for individual courses. The currently available
courses range from 1 to 10 days in length and fall into the
following broad categories: Systems Management and Operations, Control Systems, Network Systems, Data Base
Systems, Programming Systems, and Applications.
TYPICAL CONFIGURATION: The following configurations illustrate a typical A 12E and A 12 system. The
quoted prices include all necessary hardware, but no software.

70C-944YT-412
Computers

Unisys A 12
A 12E:

A12:

$795,000

31,500
44,894
1,345
85,288

2 B9246-6 line printers (650 Ipm)
1 X246-95 printer/tape DLP
lA341-93 ODT adapter (ETllOO)
1 X1l3-ICP integrated communications
processor

30,870
5,250
3,536
14,200

1 X378-10 data communications DLP
10 ETI100 terminals

8,400
16,590

TOTAL PURCHASE PRICE:

$1,037,873

One single processor with 24MB of
memory, 1 Independent I/O
Cabinet with 2 DLP bases,
1 additional Independent I/O
Cabinet with 2 DLP bases, 2 Line
Expansion Modules, 1 System
Maintenance Station, 1 operator
console DLP-3, 1 ODT adapter for
ETllOO terminal, 1 ET2160
maintenance terminal, 1 freestanding operator display terminal,
1 system installation kit
124MB memory upgrade
3 B9494-lOS disk drives (1084MB)
3 B9495-83 tape drives (125 ips)
1 B9387-51 C disk controller (1x8)
1 B9387-52C disk controller (2x8)
1 B9499-22 tape controller (2x8)
2 B9246-12 line printers (1,250 Ipm)
1 AX246-92 line printer DLP-2
1 AX395-91 tape DLP-2
1 AX304-91 disk DLP-3
3 AX372-5 Network Support
Processor
12 AX378-1 Line Support Processors
48 AX378-3/4 quad line adapters
20 ETllOO terminals

$1,304,000

TOTAL PURCHASE PRICE:

$2,319,577

192,000
180,000
67,341
15,750
21,000
85,288
89,250
4,620
7,717
7,581
110,250
50,400
151,200
33,180

EQUIPMENT PRICES
Purchase Monthly
Price
Maint.*
($)

($)

1-Year
Lease**

5-Year
Lease**

($)

PROCESSORS AND MEMORY
A 12E

A 12

A 12-UT2
A 12-UT5
A 12-MEM

Basic System; includes one single processor, 24MB main memory,
one independent I/O cabinet with 2 DLP bases, one additional independent I/O cabinet with two DLP bases, two line expansion modules, one system maintenance station, one operator console DLP,
one DDT-adapter for ET1100 terminal, one ET2160 maintenance
terminal. one freestanding operator display terminal. and one system installation kit
Basic System; includes one single processor, 24MB main memory,
one independent I/O cabinet with 2 DLP bases, one additional independent I/O cabinet with two DLP bases, two line expansion modules, one system maintenance station, one operator console DLP-3,
one DDT adapter for ET1100 terminal, one ET2160 maintenance
terminal. one freestanding operator display terminal, and one system installation kit
Upgrade Kit; A 12E to A 12
Upgrade Kit; A 12 to A 15 F
Additional Memory; 24 megabytes

795,000

1,838.00

43,592

33,223

1,304,000

3,088.00

172,606

55,597

560,000
1,824,000
192,000

108.00

98,586
10,142

74,744
7,637

2,023
2,023
608
168

SYSTEM OPTIONS
A
A
A
A

12-110
12-102
12-CON
930-2

A 930-3
A 930-4
A 995-92
A 995-93
A 995-94
A 341-93

Independent I/O Cabinet; two DLP bases
Additional Independent I/O Cabinet; two DLP bases
Console Table
I/O Base Exchange for two processor system (required for each base
to be exchanged)
I/O Base Exchange for three processor system (required for each
base to be exchanged)
I/O Exchange for four processor system (required for each base to be
exchanged)
Distribution Module (one required for each base to be exchanged
when upgrading from two to three, or three to four processors)
Line Expansion Module (LEM 1x4)
Line Expansion Module; upgrade kit (lx4 to lx7)
Adapter for additional operator display terminal (ET11 00 only)

45,000
45,000
15,000
4,725

138.00
138.00
15.50

2,630
2,630
803
217

6,825

23.00

314

233

8,925

30.00

410

297

2,625

8.00

119

3,859
2,100
3,536

19.00
20.00
15.50

149
141
214

121
115
160

~
© 1988 OAT APRO RESEARCH CORPORATION, DELRAN, NJ 08075 USA
REPRODUCTION PROHIBITED

APRIL 1988

7OC-944VToo413
Cqmputefa

Unisys A 12
~

Purchase Monthly
Maint.Price
(S)

($)

1-Year
Lease**

5-Year
Lease*·

($)

DATA LINK PROCESSORS
A 341-90
Xll0-90
X112-90
X246-95
X246-91
X293-30
X393-90
X395-91
X395-92
X304-90
X304-91
X304-95
X304-97
X304-99
Xl13-ICP
X 378-10
X394-93

Operator Console DLP-3
BCL Card Reader DLP
BCL Card Punch DLP
Printer Tape DLP (B9246-6/12 and B9498)
Printer DLP (B9246-10/12)
Nonimpact Printer DLP
NRZ Magnetic Tape DLP
PE Magnetic Tape DLP
GCR Magnetic Tape DLP
Host Transfer Interlaced DLP
Host Transfer Sequential/Interlaced DLP
SMD DLP II
XSMD DLP
SMD Expander
Integrated Communications Processor DLP (for A 12)
Data Communications Processor DLP
FIPS Hyperchannel DLP-2 (for A 3, A 9, A 10, A 12), includes two
50 ft. I/O cables, bus and tag terminals, or two 100 ft. I/O cables,
bus and tag terminals

8,400
3,700
3,700
5,250
4,725
4,725
7,560
7,560
7,560
7,560
7,560
9,345
14,500
1,890
14,200
8,400
21,000

29.00
46.00
46.00
34.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
49.00
49.00
19.00
95.00
39.00
150.00

447
231
231
319
268
268
379
379
379
379
379
555
816
115
1,178
489
1,345

351
193
193
252
220
220
301
301
301
301
301
435
631
88
919
381
1,075

Multidisk; 2 spindles, 500MB
Multidisk; 4 spindles, 1000MB
Fixed Disk Drive; 1048MB, dual spindle interlaced
Fixed Disk Drive; 1084MB, dual spindle sequential
Controller; lx8 spindle, one interface, cable, and I/O databus kit
Controller; 2x8 spindle, two interfaces, cables, and I/O databus kits
Fixed Disk Drive; 868MB, single spindle, thin-film head
Fixed Disk Drive; 3.5GB, 2 spindle, thin film
Dual Storage Controller
Dual Host Option for B 9389
Dual String Controller
Dual String Controller and 3.5GB fixed disk drive

19,500
32,500
50,400
60,000
15,750
21,000
34,450
98,140
53,600
5,450
26,100
129,150

90.00
180.00
227.00
227.00
71.00
106.00
120.00
215.00
176.00
19.00
85.00
295.00

1,124
1,918
3,158
3,685
747
992

879
1,508
2,370
2,773
563
744
1,495
4,024
2,448
251
1,192
5,317

16,000
22,447
11,465
36,225
17,750
19,000
85,288

181.50
206.50
154.50
312.00
209.00
220.50
567.50

819
1,029
821
1,446
1,011
1,146
3,237

648
811
636
1,172
732
826
2,591

7,571

32.00

309

242

22,475
57,960
24,100
70,450
32.500
86,000

155.00
355.00
210.00
465.00
290.00
530.00

1,365
3,450
1,535
4,245
2,080
5,120

1,090
2,740
1,240
3,385
1,685
4,070

Card Reader; 600 cpm, 80 column
Card Punch; 300 cpm

11,372
31,085

127.50
630.00

528
1,434

417
1,120

Printer; 2.000 Ipm, with HSSI interface
Band Printer; 1,250 Ipm, 132 positions, with HSSI interface
Line Printer; 650 Ipm, 132 positions, with HSSI interface

48.000
44,625
15,435

520.00
440.00
205.00

3,315
1,745
611

2,715
1,448
529

1,659

21.50

113

2,895

54.00

2,465

30.00

5,700

49.00

MASS STORAGE
MD8-2
MD8-4
B 9494-101
B 9494-10S
B 9387-51C
B 9387-52C
B 9494-12
B 9494-24
B 9389
B 9389-DH
B 9399
B 9399-E

4,434

MAGNETIC TAPE UNITS
B 9495-82
B 9495-83
B 9499-14H
B 9495-24
B 9495-32
B 9495-33
B 9499-22
B 9499-42
BT3244
BT3241-1
BT3266
BT3261-1
BT3288
BT3281-1

Magnetic Tape Unit; PE, 75 ips, 120KB
Magnetic Tape Unit; PE, 125 ips, 200KB
Controller 125 ips, 1x4, with cabinet for B 9495-82/83
Magnetic Tape Drive; 200 ips, 1250/320KB, PE/GCR
Magnetic Tape Drive; 75 ips, 470/120KB, PE/GCR
Magnetic Tape Drive; 124 ips, 780/2ooKB, PE/GCR
Magnetic Tape Controller; 2x8, PE/GCR, with two signal and one
communications cable
PE/GCR Tape Exchange; 2x16, for B 9499-22, with one communications cable
Slave PE/GCR Tape Drive; 75 ips
Controller: lx8 with 75 ips drive and one DLP
Slave PE/GCR Tape Drive; 125 ips
Controller, lx8 with 125 ips drive and one DLP
Slave PE/GCR Tape Drive; 200 ips
Controller; 1x8 with 200 ips drive and one DLP

PUNCH CARD EQUIPMENT
B 9116
B 9213

PRINTERS
B 9246-24
B 9246-12
B 9246-6

TERMINALS
ET 1100
ET 2160
B 26
B 38

APRIL 1988

Operator Display Terminal; 14-inch, with keyboard, RS-232-C/TDI
data communications
Maintenance Display Terminal; 14-inch, monochrome. with keyboard,
bit-mapped graphics capabilities, 512K-bit RAM, RS-232/TDI data
communications
Basic Workstation; 80186 processor, 256KB memory. 12-in. monochrome display, standard keyboard
Workstation; system MCP, 386 processor, 1MB master cluster
12-in. monochrome display, OFIS expanded business keyboard,
power supply module, line cord

•

70C-944YT.;414·
Computers

Unisys A 12
Purchase Monthly
Price
Maint.*
($)

1-Year
Lease**

5-Year
Lease**

($)

COMMUNICATIONS EQUIPMENT
A 378-11
A 378-1
A 378-7
A 378-3
A 378-4
1-QD
A 369-10
A 369-11
A 369-12
A 369-40
CP 2000-P
CP 2000-K01
CP 2011-80
CP 2011-221
CP 2011-401
CP 2012-V35
CP 2012-X21
CP 2013-1
CP 2014-1
X 203-ICP
CP 2021-128
CP 2022-200
CP 2013-2
CP 2049-901
CP 2049-902
CP 2049-903

Network Support Processor; DLP 2 with 512KB memory
Line Support Processor; supports up to 4 quad adapters
Line Support Processor; 56KB, includes interface
Quad Line Adapter II; character
Quad Line Adapter II; bit
Fore Plane Jumper Cables; for 1,2, 3, or 4 Quad Line Adapters
RS-232 Electrical Interface; character-/bit-oriented interface
CCITT Electrical Interface; character-/bit-oriented interface
TDI Electrical Interface; character-/bit-oriented interface
Autocall Feature
Communications Processor; cabinet, processor, and memory
Memory Expansion Kit
Line Module; 8-TDI
Line Module; 2-RS-232, 2-TDI
Line Module; 4-RS-232, 1-RS-366
Line Module; 2-V.35
Line Module; 2-X.21, 1-TDI
Line Module; CP LAN
Blank I/O Connector
Integrated Communications Processor for A 12
Disk Processor
Disk Drive
Extended LAN Kit
T -Bar Connector
LAN Terminator
Adapter N to TNC

36,750
4,200
10,290
3,150
3,150
NC
NC
NC
NC
NC
13,500
4,000
5,250
4,570
3,560
4,500
4,500
7,925
NC
15,620
3,680
1,870
750
55
80
50

215.00
16.50
41.50
26.00
26.00

2,216
163
452

1,756
140
376
125
125

47.00
18.00
19.00
19.00
19.00
19.00
26.00
19.00

1,040
312
405
358
286
351
362
599

797
237
313
275
221
270
281
454

50.00
15.50
17.00

868
287
160

673
221
127

22,270
9,040
771
NC
NC

142.50
60.50
6.00

865
363
39

711
297
31

5,512
1,765
3,859
2,095

37.50
15.00
22.50
15.00

238
163
89

197
61
127
71

1,155

236

20
11
59
32
52

17
8
48
23
38

Inter-System Control
A 320-IHC
A 320-5
A 320-6
CB 736
CB 737

Independent Hub Cabinet
HUB 16; includes 2 port capabilities
HUB Expansion; provides additional 1 port capability
Inter-System Control Cable; 50 ft. (FCC)
Inter-System Control Cable; 100 ft. (FCC)

Peripheral Reconfiguration
A
A
A
A

890-PRC
890-3
890-4
890-8

Peripheral Reconfiguration Cabinet
Disk Control Kit (B9387-5X B9389)
PRC PE/NRZ Magnetic Tape Control Kit
PRC GCR Magnetic Tape Control Kit

Peripheral Power Control
A 304-PPC
B9387-RPC
B9389-RPC
CB 865
CB 866
CB 867

Peripheral Power Control; power for B9387-41 /42, B9387-51 /52,
and B9389 controllers (one 304-PPC per subsystem)
Remote Power Control
Remote Power Control
Cable for B9387-RPC; 50-ft.
Cable for B9389-RPC; 100-ft.
Cable for B9389-RPC; 200-ft.

210
850
619
1,018

*For 5-day, 8-hour service.
**/ncludes 7-day, 24-hour maintenance coverage.
NC-No charge.

SOFTWARE PRICES
Limited
Time-Plan

Annual Product
Service Agreements

Monthly
License Fee

PSA 2

PSA 1

($)

3,400

1,615

935

3,531

16,771

971

Product Description
A 12-ASE

A 12-ASF

System Software for the A 12E includes Master Control Program/ Advanced System (MCP/AS), Algol Compiler, DC Algol Compiler, CPM Microcode, Utilities, Workflow Language, Menu Assisted Resource Control,
Cross Reference Symbolic
System Software for the A 12 includes Master Control Program/Advanced
System (MCP/AS), Algol Compiler, DC Algol Compiler, Program Binder,
CPM Microcode, Utilities, Workflow Language, Cross Reference Symbolic, Menu Assisted Resource Control
© 1988 OAT APRO RESEARCH CORPORATION, DELRAN, NJ 08075 USA
REPRODUCTION PROHIBITED

APRIL 1988

70C-944YT-415
Computers

Unisys A 12
Limited
Time-Plan

Annual Product
Service Agreements

Monthly
License
Fee

PSA2

PSA 1

($)

Compilers
A
A
A
A
A
A
A
A
A
A
A
A
A

12-APB
12-ATD
12-BSC
12-COB
12-C74
12-CTD
12-FOR
12-F77
12-FTD
12-PAS
12-PLl
12-RPG
12-SRT

357
210
262
262
262
210
262
262
210
393
341
262
236

2,196
1,188
1,380
1,512
1,008
1,188
1,512
1,260
1,188
2,388
2,016
1,380
874

1,260
684
756
876
564
684
876
684
684
1,380
1,128
756
504

Logic and Information Network Compiler (Linc II)
Linc /I Run Time System
Linc /I Development Partner; includes Linc II Compiler, Cobol 74 Compiler,
Communications Management System (Entry), Extended Retrieval with
Graphic Output, DMS /I, DB Interpreter

4,400
560

39,828

18,972

47,508

23,292

Activity Reporting
SMF II System Resource Management
Logger
Billing Support Library
Security Support Library
Intelligent Printer Support Facility
Multilingual System
Software Disk Cache Module; includes disk cache module key
Infoguard; requires SMF /I System Resource Management

131
420
78
78
78
168
262
5,280
675

756
2,388
432
432
432
936
1,512
11,400
3,648

432
1,380
252
252
252
564
876
6,360
2,028

262

1,512

876

262

1,512

876

1,260
341
840
1,575
78
210
138
115
1,260
240
802
1,177
1,391
267
78
105
315
288
90
420

7,176
1,260
3,144
5,976
432
1,188
660
624
7,176
1,140
4,872
6,096
7,956
1,536
432
564
1,824
1,548
428
2,388

4,152
756
1,824
3,456
252
684
385
372
4,152
660
2,820
3,528
4,620
888
252
312
1,068
864
248
1,380

APL B
T est and Debug (Algol)
Basic Compiler
Cobol Compiler (ANSI 68)
Cobol Compiler (ANSI 74)
Cobol 74 Test and Debug System
Fortran Compiler (Level H)
Fortran Compiler (ANSI 77)
Fortran 77 Test and Debug System
Pascal Compiler
PL/ 1 Compiler
RPG II Compiler
Sort Utility

Productivity Aids
A 12-LN2
A 12-L2R
A 12-DCL

Support Utilities
A
A
A
A
A
A
A
A
A

12-BAR
12-SMR
12-LOG
12-BSL
12-SSL
12-IPF
12-MLS
12-CMM
12-DAC

Data Communications
A 12-DCS
A 12-NCS
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A

12-BNS
12-CDE
12-COE
12-COT
12-DIA
12-EDI
12-ESN
12-FSL
12-HSV
12-L62
12-MCB
12-MCA
12-MCT
12-MCF
12-NDA
12-RJE
12-RMP
12-SDF
12-SJE
12-X25

Data Communications Software Package includes Network Definition Language II (A 12-NDL), Interactive Data Communications Configurator (A
12-IDC), and NSP/LSP Firmware (A 12-NSF)
Network Communications Subsystem includes Network Administration
Utility (A 12-NAU) and Network Services" (A 12-NSS)
BNA Network Service
CANDE; Command and Edit
Communications Management System; Entry
Communications Management System
Diagnostic MCS
The Editor
SNA 3270 Emulator
Format Support Library
Host Services
SNA LU 6.2 Service Manager
Gemcos (Basic)
Gemcos (Advanced)
Gemcos (Total)
GEMCOS; Format Generator (requires MCA or MCT)
NDL /I Analyzer
Remote Job Entry
Remote Print System
Screen Design Facility
SNA/RJE
X.25 MCS

(1) Onetime charge.

APRIL 1988

70C c 944YT -418
Computers

Unisys A 12
Limited
Time-Plan
Monthly
License
Fee

Annual Product
Service Agreements

PSA

($)

1,837
525
315
892
210
210
183
210
210
236
175
1,500

6,984
2,892
1,824
5,100
1,188
1,188
1,008
1,188
1,188
1,320
948
8,100

4,032
1,572
1,068
2,952
684
684
564
684
684
756
528
4,500

2,950

15,936

8.856

675
175
1,013
675

3,648
948
5,472
3.648

2.028
528
3.036
2.028

682
78

3.780
432

2.016
252

401
428
210
535
315

2.244
2.052
1,188
2,880
1.788

1.284
1.212
684
1.596
1.032

249

1.764

936

{t} 15.000

126

1.880
756

1.680
432

80
40
50
210
90
96
60

480
240
300
1.200
540
480
300

300
180
180
720
300
300
180

Data Management
A
A
A
A
A
A
A
A
A
A
A
A

12-0M2
12-ERG
12-012
12-100
12-0BA
12-0DM
12-0MT
12-0MC
12-0ME
12-TPS
12-0C2
12-IE1

A 12-IE2
A
A
A
A

12-IQF
12-0CM
12-QP
12-WQF

OMS II Data Management System II
Extended Retrieval with Graphic Output (requires DMT)
OMS II Inquiry
Advanced Data Dictionary System
OMS II Data Base Analyzer
OMS II Data Base Monitor
OMS II OM Interpreter
OMS II DB Certification
Data-Aid
OMS II Transaction Processing System
Interpro Operations Control Manager
Information Executive (lnfoExec) Package 1; includes InfoEx.ec/ ADDS, InfoExec/SIM. InfoExec/SIM Directory
Information Executive (InfoExec) Package 2; includes InfoExec/ ADDS, In~
foExec/SIM. InfoExec/SIM Directory, Data Management System II
InfoExec Interactive Query Facility
InfoExec Operations Control Manager; requires InfoExec IE 1 or IE2 package
InfoExec Query Package; includes InfoExec/IQF, InfoExec/WQF-Host
InfoExec Workstation Query Facility; Host

Reporting
A 12-RP3
A 12-0R3

Reporter III
Online Reporter III (requires RP3)

Workstation Integration (Host)
A
A
A
A
A

12-0ES
12-0E2
12-0TS
12-HLS
12-IOF

Oata Entry System
On-line Data Entry System ODESY
Data Transfer System
Host-Link Server
Intelligent Distributed Editor (B 20. ET2ooo. PC)

Networking System Software
A 99-NCF
A 99-CPG
A 99-CPC

Network Control Facility includes Network Control Manager (A 99-NCM),
Distributed Control Agent (A 99-DCA), and Graphics Display Module (A
99-GDM)
Custom Protocol Generator
CP2000 Configurator

CP2000 Software and Protocols
CP 2000-COS
C 99-TTY
C 99-BSC
C 99-X25
C 99-X21
C 99-ST2
C 99-SDL

CP2000 Operating System Software
TTY Station Group
Bisynchronous Station Group
X.25 Protocol
X.21 Protocol
SNA PU T2 Adapter
SOLC Station Group

(1) Onetime charge . •

APRIL 1988

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70C 944YT 40_8804_Unisys_A12 40 8804 Unisys A12

70C-944YT-40_8804_Unisys_A12 70C-944YT-40_8804_Unisys_A12

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