RX01_Schem RX01 Schem

RX01_Schem RX01_Schem

User Manual: RX01_Schem

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RX01
Engineering Drawings
Digital Equipment Corporation

The material herein is for inforrration purposes only
and is subject to change without notice. Digital
EQuipment Corporation assumes no responsibility for
any errors which Inay appear herein.
These drawings and specifications herein are the
property of Digital EQuipment Corporation and shall
not be reproduced or copied or used in whole or in
part as the basis for the manufacture or sale of items
wi~hout written perrnission.
Copyright C' 1975; Digital Equipment Corporation

ldIiklhlt\alII~~§.o::!~~

~-=~-=~-:::::-~-=..:-====::'::~

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DIRECTORY______ ;:I~== :~:?oT::Su5E~:I~~~NP=RT~
rIEDmI~\W~::"'~':: ~~ES:-l
19 1975 •
CUSTOMER PRINT SET INDEX
THIS IS PRINT SET I I I I T
r
, r

_____ DRAWING

IIGUIIICE ,

-=:"":~:"":~~':"::":=-_="::":=~:"":~~:':":'

IIQUIIICI

B-DD-RX~l-~

RX01 FLOPPY DISK DRIVE
FLOPPY OISK CONTROL BOARD

D-CS-M7726-0-1

RX01 FIRMWARE LI STING

K-SP-RX0t'"O-2

READIWRITE
H771 POWER
PLENUM/FAN
PLENUM/FAN

D-CS-M7727-~-1
B-DD-H771-~

CONTROL BOA.RD
SUPPLY
ASSY~ (OLD STYLE)
ASSY. (N~W STYLE)

B-DD-7~135~3-~
B-DD-701S622-~

~IT~EMS!!IfJ~TNIM' .lnEI PE..ISSION.

COPYRIGHT

DIGITAl EQUIPfi£NT CORPORATION-

,

PRINT SET

UNIT

I

V ARIA TIONS

VAR

TITLE

R.x0'l-AA

SINGLE FLOPPY DISK~ 115V,6~ HZ
SINGLE FLOPPY DISK, LOW V, 5~Z
SINGLE FLOPPY DISK, HIGH V, 50HZ
DUAL FLOPPY DISK, 115V, 6.0' HZ
DUAL FLOPPY DISK, LOW V, 5~Z
DUAL FLOPPY DISK, HIGH V, 5¢Hz
ONE REPLACE DRIVE, 6~ HZ
ONE REPLACE DRIVE. 5j HZ
RX~I-BA wlo BEZEL ASSY
RX~l-BC WIO BEZEL ASSY
RX~l-BD wlo BEZEL ASSY
RXeJl-AA wlo PLENUM ASSY
RX~l-AC w/0 PLENUM ASSY
RX01-AD w/o PLENUM ASSY
RXeJl-BA wlo PLENUM ASSY
RXSI-BC w/o PLENUM ASSY
RX~l-BD w/o PLENUM ASSY
RX~l-DA wlo PLENUM ASSY
Rxml-DC wlo PLENUM ASSY
Rx01-DD WIO PLENUM ASSY
RX01~BA FOR VX78 (BC60D)
RXOI-BC FOR VX78{BC80D)
RXOI-BD FOR VX78 (BC80D)
RXOI SINGLE FOR KC780-IIS, 60HZ
RXOI SINGLE FOR KC780 LOW V. 50HZ
RXOI S INGLE FOR KC780 HIGH V. 50HZ

RX,01-AC
RX~l-AD

RX.0'l-BA
RX~l-BC

RX01-BD
RX~l-CA

RX01-CC
RX.0'l-DA
RX01-DC
RX~l-DD
RX~l-FC

RX~l-FD
~l-HA
~l-HC

RX~l-HD

RX01-JC
RXfIl-JD
.RXOl-LA

RXOI-LC
RXOI-LD
RxOl-VA
RXOI-VC
RXOI-VD

RX~l

X
X
X

X

X
X
X

X

X
X
X
X

X
X
X

X
X
X
X

X
X

X
tx

X
X
X

FLOPPY D.ISK DRI,lE

~EV

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DISK DRIVE ASSY
B-DD-RX01-0
E-UA-RXfjl-'-~

C-PL-RXOI-O-O

CHASSIS W/HINGE

D-IA-7010679-0-0

RJC.fl

H771 POWER SUPPLY

BEZEL ASSY

D-AD-7010721-0-0

0-

B-DD-8771-'

READ/WRITE CONTROL
BOARD
D-CS-M7727-'-1

~LOPPY DISK CONTROL

BOARD
D-CS-M7726-~-1

~

PLATE, FRONT,

SINGLE DRIVE

I

PACKAGING INSTRUCTIONS
RXOI INTERPlANT

D-IA-7413002-0-0

PLATE, FRONT,

A-SP-3700185-fJ-~

PACKAGING INSTRUCTIONS
RXOI CUSTOMER
A-SP-3700193-Jif-91

DUAL DRIVE

D-IA-7412853-0-0

PACKAGING INSTRUCTIONS
Rx01 INTERPLANT
~ w/o BEZEL ASSY
A-S p- 3700185-1
~

13

FLEX! BLE DISK DRIVE·

14

FLEX! BLE DISK DRIVE

II

15

PLENUM/FAN ASSY

FLEXIBLE DISK DRIVE

(OLD

8-00-7013077-0

8-00-7014300- 0

A-PS- 3012304-0- 0

STYLE)

B-OD-13503-0

12

PLENUM/FAN ASSY

(NEW STYLE)
B-DD-7015622-0

TITLE
~1 FLOPPY DISK DRIVE

DRB 107
DEC 16-(325)-1062-""""1

SHEET2 OF 3

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A-PS-9905183
A-PS-990S710-0-0
A-PS-990S712-0-0
IA-PS-990S713-0-0
A-PS ·990S729-0-0

(RX~l \

n-AD-7010721-0-0

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1
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n-IA-7412853-0-0
C-SS-7412853-0-1

I

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SILK SCREEN. DUAL DRIVE

)(

BEZEL. RU1

7 'D-CS-M7727-Jl-1
D-IA-5011370-0-0

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C-NO-74 13350-0-0

A-P5-990571-3-0-0

B-DD-7013S03-0-0

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3

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'3

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3

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to

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SCORED SHEET
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A.-SP-3700193-0-0

PACKAGING IN'S! CUSTOMER
FULL TELESCOPE .CAP
FOAM PAD
LAMINATED BUILDUP
PLASTIC STRAPPING

A-PS-9905740~O-O
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ACCEPTANCE TEST PROCEDURE

A-PS-9905729-0-0
A-PS-9905741-0-0

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14' B DO 7014300-0

READ£WRITE CONTROL BOARD
ETCHED CIRCUIT BOARD (M7727 J

PACKAGING IN.ST. INTERPLANT
REGULAR SLOTTED CARTON
ONE PIECE FOlDER
PLYWOOD SUPPORT FIXTURE

A-PS-99057Il-o-0
6

RX~I ENGINEERING SPECIFICATION
RX01 FIRMWARE LISTING

PACK INSTR'W If) RF.7.F.T.
LAMcrNATED BUILDUP
REGULAR SLOTTED CARTON
PLYWOOD SUPPORT FIXTURE
SCORED SHEET
CARTON SEALING TAPE

A-PS-99051 10-0-0
C

RXJ1 FLOPPY DISK DRIVE
SHIPPING B~CKET

T LVlT'-'

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ILOAD COUNTER -TT~ CONTENTS 0' ~EXT ROM LOCATION
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91

IFORM.TI SR r.O~D (T)(F)rn~E)ClERO)
IIF CO . . DITIO~ I~ MET, A BRANCH IS MADE WITHIN
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IIF THE CONDITI"N 18 NOT MET, THE NEXT ROM LOCATION
lIS IGNORED A~D THE FOLLO~ING INSTRUCTION IS !XECUT!D
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PALl0

9117

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115

116

IFOR~'TI
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1586
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1589
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ITHIS ROUTI~E COMPARES THE HEADER TRACk ADORES' TO THE
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9117

PAGE 11

IrSUBROuTINES= GETwO~D A~D GETCOM~AND1
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1Q2';

193m

1931
1932

2115

1933

21160

193"

2117

111"15
0070
0141

D~LAY

SUBR FOR 3Ma OELA'

-30-1

~CB"

193e.

212~

0012

2121

0010

SET aTPHD
CLA STPHO

IISSUE ITEP PULSE

1937

2122

0212
lli0

DELAY

Juf4, '2

ICALL

19]t,

UJQ
1910
19.t
1'·2
19.3

2123

1IU2
"BU

1,.,0

19t1'i!
1916
1'·7
19.8
1'.9

21260
2127

SECPLS, SET STPHO
CLA STPHD

31)70

LeT
DO~STP

2lJ~

2U5
ae75

2131

"~70

LS"
LeT

2132
2113

03"1

-30-1

19150

1951

alll

211"

13130

19541

2115
21160

111011

"55

213'7

lUI"

O~LA'

IISSUE SECOND ITEP PULIE
ICALL DELA'

f~R

]MI DELAY

ICHtC~

C~U~T

Jul'4P FZ
DELAY

195~

195J

,'!b.

21~C

~l3kl

OO~STP.

Ull
iUS

O.£~ TEMPA
ESP
8_ COFL F
eKffOIl4E

I~OT

aT~p

OO~E,

1951

IRX01 FL,lPP Y CC't-JTQOI. LEI:f FIR"'''ARE
I t;se.

1'159
19.~
1~.1

21"1
21"l

~~73
?~n

21"'5
21"&

1i:'lt\1S

21~7

1I'0bU

"'11'1.12

19t."

1~.3

lQ,LI
1905

O-Etot RfNl
ESP
ICT
leT

1.i1e
;,.,11

21£14

21"1

"e7k)

tQ6"

lQ07

2152

lq68

21S1

19&q

2152

~e72'

2153

l'200

1'71

2154

0~75

t~14

2155

0klb"

Dl.Y(1),

\lUT,

1Q1b
1 c.,.,1
1«118

21Se

i3~10

2157

21&5
01U7S

216('

1919

21bl

e2l711l

It;lae
p',al
1'Ja2

21~2

0000
111212

21e,1
21b"

21&5
21&t>

IDO~E

I~

.·"E8·1,.

MOM£

.111

paGE 11-,

STEPPING, INCREMENT RETURN AOORE.I IY I

ISTOR~

RETURN ,"ORE81 ALIO ITaRT 0' I'MI U!LA" aU.OUTIN!

ILUAD rtEAO
ISf.T SOFT HD LoaD 8IT

DECIMAL
L.SR
LSP

130~

027021
0203

LDHI)

Y142A

C~ECK

200

P/8it

1'JaG
l«1a'.)

HTNA

OPE'" TE"IPE
LCT
OCTAL

~250

It;11;!
1 q1'")

OPE~

LSR
LSP

len,:
1'~'71

'ALle

GO

DO~DLY,

LCT
DONDLV
LSR
LeT
-255-1
JUMP F2
DELAY

ICALL

OPEN RTN.
JUMP F0 INO

IRETUR~

D~LAY

SUeR FaA 2S"S OELA'

FROM

ST~P

HE.O OR DELAY 25MS SUBROUTINE

lC;8~,

1 Q8'
lQa'i

1'189
lqt;l0
lq~l

1"Q~
lq~3

lqqQ
lIJQ',)
199.
1997
1'198
1999

iee,

2.01

21112
2"'3
ZIJ14

2005
ZIIII.
Zlll

21.'
281'

I

2167
21711'
2171
2172
2113
Z1711

2175
2176
2177
2lee
2201

~070

0]74
0234
0075

0e64&

l!!e711l

'.11

READ,

LeT
-l-1
OPE III TEMPe
LSR
LSP

13 TO DATA M,qK TAY COUNTER

LtT

1ST ALL FOR 9b MTtRO SEC (3 8YTES) TO AYOID .It, TUltN ON S'LAIH

0Z07

-120-1

13073
0124

ICT
FLAG O~~
BR COFL

2176

.-3

llll

017l
0075

l.SA

l21"

0216

JUMP FJ
GETDAM

2202

0011Z

1l1ll

"ll

[R OlJ1 1!liE I READ SECTOH CONT. )

2205

1441

ItT

ISET THE FLAG

T~

SPECIFY DATA AM IN FIND AM ROUTINE

F

IClA COUNTER AND SR
IGO TRY

FI~D

THI! lDDRESS MARK

IRX01 FLOPPY

CO~TROLLER

PALU

FIRH~ARE

9111

2013

211114
2l:15
211116

ITHIS ROUTINE FOLLO~S THE DISCOVERY 0' A ~'" MARK OR
IA OELETEU DATA ~ARK. IT MOVES THE N~XT 1124 BITS
II~TO THE S~CTOR BUFFER, THEN PICKS UD AND CHtCK5 THE CRee

2 III 17

2018

CLR BAR

2U~

2120
2021
2122
211123
2024

ICLEAR THE

SEPCLK

BU~F~R

'ODREII RlGISTER

IwAIT FOR CLOeK

22t117

014"

SR

221'''

2201

.-1

2211

0t!5l

STA~T

2212

0015'5

DATtRC

IUPDATE THE CRC WITH SfP OAf A

2213
2214

SR BAROFL T
GETCRe

lIS BUFfER FULL YET!
IYES, GO GET THf eRC

2215

F"IN

2216

INCR BAR

IADDRESS

2217
2220

0222
2201

JUMP F4
DATA+l

ILOOP

2~21

0"50

F

IIIIRTBUF

ISTART THE "RITF. PULIE FOR THII BIT

2025

2e2tt
2127
2028
"21/J29
203m
2031
2"32
2033
2ml"
2035
203&
2037
2138
2039
2040
2!41

2222

0010

2223

111151

GETCRC, FIN WRTBUF
LeT
-16-1

21142
2043
2044

2224
2225

2045

21U'

2047
2048
2049
2051
2051
2052
2053
205"

2155
205'
2'57
205e
2'59
Z0tt'
2"'1
20'2
Zett3
2".~

21ft5
Ze6e2067

2226
2227
2230

2231
2232

2l!!e-6
2;;&9
2'1~

2f'71
2072
211t7.)
2074
1075

,,,,7.
2S71
2818
lel.,
208u
lit''' ,

BIT

DULSE FOR THE LAIT BIT

14 NOOPS FOR

~,,55

DATeRC
ICT
itR COFL F

IPUT CRC SIT TN THE CRC GENERATOR
IINCREMENT AN~ TEST 81T COUNT

lO~'

IEP CLOCK

.-9

INOT DONE, GET 'NOTHER

all"
P.B71

OPEN STAT
ESP

ISTATUI TO SHTfT REG

l075

LS~

liZ&!
2l"b

eM

IE~D

15E1 DEL DATA BTT OF ITAT IF FLAG.'

22"7
et16

22"7

~176

&R FLAGO T

~p741

~12c

CO~T~OLLER

PILU

Flff~ .. ,q~

2i'H

2l5u

.+4

1~5'

1?1b

~25l

.11222

2253
l25 ..

225~

QCT&TE O~t.
JUMP FA
.+2
MCTATE ZERO

2cr;~

~RITF

~EKT

LDHD
LDHO
LOHD
LOMO

SR7 T
.+4
ROTATE ZERO
JU~P F.
.+2
ItOTAT! ONt.

2255

lEND THE

FO~

ISET BIT COUNT TO 1. fOR 2 IYTE CRe

2241
224l
2ltl]
2244
2i45
22410

IRKOI FLOPPV

SECTOR BUFFER CELL

~EXT

8AC~

PULSE

~RtTE

00(12
00"2
210(&2
faecal

223c.

i201/l

END THE

.-1

0073
iH24
222"

2237

I~D,

SR SEPCLt< F

2iU
223"

2235

i'lRTBUF

n1Q
"'1'1\~

(ana

2257
2eb.'
libl
22tt2
2203

P122
220"
!'!;)161
i1I222

~16~

;'Ii!lle.

i20S

LeT

V1G2A

IE~D

-s-a

JROUND

."I~T

Of DRY RDY lIT Of I'AT IN IR

"-fEB-7~

AAOUND

9111

SHI~T

PAGE IZ-!

OF NEXT 5 BITS Of ITAT IN IR

"Ii SA7 T

.+4

ZERO
JU"-' F"
.+2
SlOT ATE OlliE
ItT
SR COFL F
.-8
~OTATE

2~82

22b~

IB83
118-

~"7 51

li~b

i"tiC

22607

2251

2.,86

2210

~e87

2271

('1357

LCT
-160-1

ISE.T BIT COUNTEQ TO

2212
2iT3

il132
2304

~;; CRCI. ONE
DCRtER

lIS THIS CRC aIT OK
INO, GO REPORT "'ATA CRC ERROR

2i74

epS4

(!ole

221S
2276
2277

v-!:'I7l
~12"

leT
BR eOFL F

IINCRE HE"'T AN" TEST BIT COUNTER

2272

.-15

IGO CHECK

2lfc'!e

111074

ROTATE ZERO

ICRC

21V1

"'''.4

LSP

IPUT THE STATUS WORD BACK IN ICRATCHPAD

0212

JU"'P F2
OKDOlliE

IEXIT TO

1885

lalS
le89
2f11ge
2091
2092
2"'93
2394
2095
2(190
2097
2.98
llilQ9
2100
cUI

~v7v:

ZERO

I~ES,

~PING

~.s

16 FOR CRC TEST

UD "EXT CRC BIT

ANOTH~R

GOOD, CLR CRC ERR BIT OF IT AT IN SR

21~2

2l~2

2Ul
210"
2105

21a3
1104

0070

2107

13015

"'0b4

LSP

IPUT THE STAT W"RD lUCK

21Btt
2307
231e
2311

~~10

0230
0220
2610

LeT
KOCRCEA
JUMP F'5
GOERON

IERROR CODE

101/10

DCRCER, ROTATE ONE

1106

2108

2U9
211B

2111
lUI

II~SERT

OO~~E

1 INTI."t CRe ERROR Bn

F~R

CRC ERROR

IRXBt FLOPPY CONTROLLER

FIR~w.RE

911T

I[SUBROUTI~EI ~.IT FOR RUN]
ITHIS SU8ROUTI~E ~ILL WAIT 'OR RUN. r, •• MI ELAPSES, THE HfAD II UNLOADED
lAND T~E ROUTINE CONTINUfS ~AITIN' FO- -UN, RETURN ADDREla II PASIID
IvIA THE COUNTER

i113
lll"

2115
2110
2111

2118
211q
2110
2121

1ST ASH THE

02b101

2311
231"

MI75

LSR

0ett"

LSP

2315

e102

6~

231b

2347

RIJN
GOT RUN

2317
2]?~

0240
0070

rJPEN TEMPC
I.CT

2121

00~0

V1

~12c

212]
2124
2125
21Zo
2127
2128
212CiJ
2130
2111
2132
211J
213"
2115
2130
2117
2138
211q
21'"

OPEN RTNB

il12

""AITR,."

SACK,

AETU~~

IGOT RUN?

T

IPRESET LOOP

0075

2l?3

00b"

21ii!"
2325
2320

0302
23"7

~30Z

i?327

234&7

233'"
2331
23:52

23"7
0302

,21Jl

23"7

2l14&
2:ns
2310

ESP
ICT
SA COfL F

IINCR~ME~T

2311

0011
0073
0124
2122

8ACK

IA6MS NOT

21l.lf

02C;0

OPE~

21"1
23"2

1J~11

ICT

"~75

21~1

~004

LSI'

23(4"

~~".;!

UNHO

"'1~0

8R

11"5

13.5

21"'''

it"l~

11,-.;

2151

TO •

WBR RU~ T
GOTRUN
wtSR RU~ T
GOTRljN
oIiI8R RU~ T
GCTRUN
"'6M RU~ T
GOTRUt,j

~lez

l.J40

COU~T£R

IRESTORE LOOP cnUNT

I.SH
I.SP

23i.J'2

21~1

21"2
2103
21'"
21'5
2140
2147
21"8
ilAq
liS.,
2151
2,Sl
2151
liS.
21S5
2150
2157
2151
ltSq

ADO~!II

TEMPE

ITtM[ IS

ANr. TEIT LOOP COUNT
YET

£LA~I!O

EXPI~£"

('5.8 MI). CLEAR THI 10'T

MDLD lIT AND UNLOAD THI

~'D

LSR

"U~

.-1

G~TAur"

~l."

vitl

f:

• CLA wRfa

o.. [·~

1iI'~8

JU""

I~O

IIF

R~N

IAETUR~

W'I

R~I.O~'E

TO .'REI

FROM W'.TRUN IUIROUTIN£

fl

11~Q!

21&'

PAL13

INITIALIZE CO~T.l
OF T~f I~ITI'LIZE SELF

11~2

l(gOUTI~£1

l103

ICO\Tl~u'TIO~

21~"

T(::ST,

l1b~

LeT

ILOAD

R~

2107
21b!
2169

2153
215&>

P~15

2t711l

2155

022 ...

LSQ
OPEN

2171
2112
2113

2350

~~'IliU

LSP

wITH

21fllr

?17b

ILOAD R10

~lT~

2118
211q
21"2a18t

23b2

~25/.

r.PE~~

23&3

i""bU

LSP

23&"

0~I&C

2305
23&&

~17b

FLAG 0'"
BR FLAGO T

2371

.+3

23&7

~l12

Ju~p

2J7C

l.H"

It/TER!

IFLAG FAILURE

OPE...,

~5

ICONT~NTS

F2

IGO

~,",,15

RPI

2\71

ESP
LSR

2372
2:\13

ll~e

21ql
Zlqi
llql

ISET FLAG AND TEST IT

F2

l180

21A1
2188
218q

TEST PATTERN 125

CoECI~AL

2~.1

2185

PATTERN 252

LSR

~t77

a18"

T~IT

R5

LCT
OCTAL
125

2357

211~

2182
l181

TE~T

OCTAL
252
DECIMAL

2t&t.

2115

PAGE l'

V142'

~i12

JI.J~P

\351

TESTl

OF Q5 TO SR.

CONTI~UE

SHOULD 8E 252

TNIT TEST IN FLO 2

i19~

~19S

l191li

2Hb
?H7

~~~z

IOPE~

" ~I~e.

IOPEN

.--.-,~.----.,.,,-------

IRXII FLOPPV

CO~THGLLEA

il9T
Z19S
il"9
zZle

OPEN TEMPA

IFOR BIT

00T0
0367

LCT
-8-1

IBIT COUNT IS 8

0075
0064

LSR
LSP

IRESTORE BIT COIINT

0254
0071
007'5

OPEN TEMPF
ESP
LSR

IF TO SR

~c3e

Z4'l
2402

Zlli

Z403
l"04

ZlU

l"05
2406
2407

li! IT
l218
l219
l2ze
Zill
ll22
ZlZ3
li24
2Z2S
iZZ6
22ZT
2ii8
i229
ii31
2231
ii3l
2233
2i34
Z235
ii,6
2i31
Ille
li3.
22 ••
Z2A,
214Z
21.1
21 ••
22.5
22••
12.'
l2.e
12••
liS"
11!5t

~AGCOM,

eou~?

Z411

2443

0120

BR SR1 ZERO
TSTGe

ITEST F
IITS "

2412

0076

ROTATE ONE

IITS I, BRING U. NEXT lIT

l413

ee6G

LSP

IRES TORE ,

2414
2415
l416

0260
eeTl

IG TO SR

e075

OPEN TEMPG
ESP
LSR

2"i~

el2'"
l4Ji

SR SA' ZERO
GLESS'

ITEIT I
IITI I, I II LESI THAN ,

Z421

e014

AOTATE ZERO

IITI I, BRINI UII

Z"ii

"06"

LI"

IREITORt. G

2423
Z424
20Z5
2026
ZOZT

eiJe

O-E" TEMPA

IINCRE~ENT '"~

2410

2QIT

i'Jv
2.Jl

I"J2

laJJ

,.JM

2A1S
1.1.
I .. J7

I".'

~EXTG,

0011

EI"

01iA

II.

reTJ

COF'L ,
"AGCO"+)

a4lt]

OPE'I NT .. A
JUNII ,. INO

illii!
0l'"

fl21i1

ftilll
er'l
eO'J
1213

~£XT

GLES,F.

'EIT lIT COUNT

OII!~

'I"
ICT

RTNA

IGO COMPARE A-'TM[_ lIT

IALL IITI

CO~'~!O,

,-"IITI
""TS

"

II LEI. 'HAN F .'TURN TO .T" ••

IF

~A'

LIP

""Mil F.

ll~S
IZ~.

TSTG~.

liS1
Il~1
ll~.

ll.e
2l••
Il.i

~aT.tt

IhO
ZERO

8,

LSII

IlfEITOAE F

OPE'" tEMPI
ESP
L!A

1& TO IA

SAT ZEAO

BMI~G

UP NEXT lIT

2·~.·

:'ll~

!,I\

II ••

l-!.l

iall

·~lXTG

II••

IIlSi
I.'))

~~7e

OPEN RTNA
ESP
J",HP F5
GLESSF+q

IG IS LEIS THAN F.

LeT
KHO"ERR

IHO~E

II."
II ••

II ••
21".

NO DI,FEIENCE

ICT
ICT
ItT
LII

2lSa

za.s

, lIT

ICT

2252
Z2SJ

116)

VllilA

(S'IBROUT INE I "1AGNlTUDE C0fo1P4A ISON]
ITHIS SUAROUTINE COMPARES THE EIGHT 8TT NUMBERS IN RE81.TERI , AND 8
I EXIT IS TO THE RETUR~ ADDRESS IF F.Q.
%, FeG, RETURN II TO RTNA.I.
IIF F>G, RETURN IS TO RTNA+4. COHTEN?S 0' , AND G ARE UNO!~INED AT
ITHE E~D OF THE SUBROUTI~E

2400

li13
il14
l21'5

PALU

I

Z~ll

Zili
2il3
ill4
illS
ill6
lilT
lies
2l.9
llll
2ltl

fIRMwARE

2-sa

il71
I~l.

2.~S

ielJf.t

,a'i.
lA51

e07i-

ITEST G
IHATCHS F, GO a-ING UP NEXT' lIT

RETURN TO ATNA .,

Z2Tl

11"1

I,ll

II'"

21'S
111.

liT.,
21"

II.,.

1~60

2".1

IU'S&

02i6
Zb10

Iii.
2211
1111

"'\)~EAR,

FOUND

8~F~RE

LAST ITEP TAKEN

JUMP F5

GOEADN

ItS~8ROUTINEI DIFFERENCE)
ITHIS SU8ROUTINE COMPUTES THE DIFFERE~C~ BETwEEN TWO EIGHT lIT
I~U~BEAS. ENTER ~ITH THE RETURN AOOAE!S IN ATN, A IN THE
ICOU~TER AND 8 IN THE SHIFT AEGISTER. EVIT II MADf wITH THE
ICO~PLI"ENT OF THE DIfFERENCE IN THE ~HTFT REGIITEA,
IExIT IS TO RTN IF A•• 8. EXIT IS TO -T~+i I' Aca

Ill)

II ••
IllS
lil.
1111
lile
1119
2l"
li91

~110

OPEIII TEHPA

IOPE~

21.J
12••

31i.
i501

BA COFL T
DIF8

IHA8 A REACHE~ ALL ONEI YETt
IVES, GO GET ~ ~OR THE DIFFERENC!

0e."

LSP
LSR
ESP

INO, GET 8
" INTO SHIFT .PG
18 INTO COUNT!R

I'"

ll.S

I I••

11.1

11015

ll.e

12.'

aJII

1311

aJli
1)13
Ill.
11.5

IJ.6

0071

01i.

TE"POAA~V

PATH THAU THE I'

i .. l1

iS01

8A COFL T
01F.

'"'S B AEAC"ED ALL ONEI YETt
IYES, GO GET A ~OA THE OI"fRfHCE

i"'~
'473

11173
III••

ICT
LIP

IINCRE"'ENT 8
I, BRIN' 8ACK A
/8 INTO S~JFT RfG
IA INTO COUNT!'R

l47~

14741

1 .. 7!»

~0TS

lIeTI

LSA

ESP

,.11

PALl0

ItT

ile7

IINCRE14t,NT •
IGO SACk TO T~aT A AGAIN

Ju14P '5
DIF+l

lIeS
III.
iln
llU
llll

DIFe,

OPE~

JUt1P FI 11110

I" IS THE CO".L'~EN' OF THI DiffERENCe:
IEXIT A:.-8

DI~A.

1& IS THE COH-L'"ENT 0' T"' DI"ERENCE
IINCRE"ENT TH~ -ETURN ADOREII IY l

l311
ill"
il15
lll.

RTIIIA

2503

22711'
0071

OPE'"
ESP

llil

250~
250~

0011

ZIt"

l~~b

~071

ItT

2517

8064

2510
2511

~075

2~.i

£!I~6"

2513

0075

LSP
LSR
ESP
LSP
LSR

25141

021113

JUMP Fe

ll27
ZJi!1iJ

2511
2}22
2111
212"
211S
21?et
2127

PAGe: 15-2

RT~A

ItT

21011

IAEaTOR~

INO

RETU-N ADDRESI TO

ICRATC~'AO

AND A TO

.~

lEX IT AeS

21~18

23i1l,

I[HOUTINEI FI~O HEAOER CONT.)
IT HIS ROUTINE CHECKS THE eRe, AND THE

21le
i331

R~SULTa

OF THE TRACK

i]!~2

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