SXTMARK.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: SXTMARK.agc
## Purpose: Part of the source code for Artemis (i.e., Colossus 3),
## build 072. This is for the Command Module's (CM)
## Apollo Guidance Computer (AGC), for
## Apollo 15-17.
## Assembler: yaYUL
## Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
## Website: www.ibiblio.org/apollo/index.html
## Page Scans: www.ibiblio.org/apollo/ScansForConversion/Artemis072/
## Mod history: 2009-08-04 JL Adapted from corresponding Comanche 055 file.
## 2010-01-31 JL Fixed build errors.
## 2010-02-11 JL Fixed error on p242.
## 2010-02-20 RSB Un-##'d this header.
## 2010-12-29 JL Fixed indentation.
## 2017-02-08 RSB Proofed comment text by diff'ing vs Comanche 55
## and/or octopus/ProoferComments as most-appropriate.
## Page 239
# PROGRAM NAME - SXTMARK
#
# MOD. 1 8 AUG. 69 BY P.RYE
#
# FUNCTIONAL DESCRIPTION
#
# SXTMARK IS CALLED BY P03 AND BY P22, P23, P51, AND P52 VIA R53.
# THE REGISTER MARKINDX IS SET TO 5 IF THE CALLING PROGRAM IS P22, OR TO 1 FOR OTHER USERS.
# THIS REGISTER INDICATES THE NUMBER OF MARKS DESIRED.
# THE REGISTER EXTVBACT IS CHECKED (SUBROUTINE TESTMARK) TO INSURE THAT THE MARK DISPLAY SYSTEM
# IS FREE. IF NOT, BAILOUT (31211) IS DONE.
# BIT 2 OF THE REGISTER EXTVBACT IS SET BY SXTMARK, RESERVING THE MARKING AND EXTENDED VERB SYSTEM.
# SXTMARK DISPLAYS A FLASHING VERB 51, CALLING FOR MARKS. A PROCEED RESPONSE TO THIS DISPLAY
# WILL RELEASE THE MARKING SYSTEM (SUBROUTINES MKRELEAS, CLEARMARK) AND RETURN TO THE
# CALLING PROGRAM.
#
# WHEN SUFFICIENT MARKS HAVE BEEN MADE (MARKINDX = 0) A FLASHING V50N25, R1 = 16, IS DISPLAYED.
# A PROCEED RESPONSE TO THIS DISPLAY WILL RETURN TO THE CALLING PROGRAM AFTER RELEASING THE
# MARKING SYSTEM.
#
# MARKS ARE PROCESSED BY THE ROUTINE MARKRUPT AS FOLLOWS:
# IF NO MARKS ARE CALLED FOR, ALARM CODE 114 IS SENT AND THE MARKRUPT ROUTINE EXITS.
# IF A MARK IS ACCEPTED, MARKFLG IS SET TO ENABLE A REJECT.
# IF R21(P20) IS RUNNING, DATA IS MOVED FROM STORAGE MRKBUF1 INTO MRKBUF2. NEW MARK DATA
# IS STORED INTO MRKBUF1.
# IF P22 IS RUNNING, MARK DATA IS STORED INTO SVMRKDAT, USING THE REGISTER P22DEX AS AN
# INDEX AND THE REGISTER 8NN AS A COUNTER. MARKINDX IS DECREMENTED.
# IF R57 IS RUNNING, MARK DATA IS STORED INTO MARKDOWN FOR DOWNLINK, THEN PROCESSED AS FOR
# R21. MARKRUPT THEN CALLS MARKDISP (IN R57).
# FOR OTHER USERS, MARK DATA IS STORED INTO MRKBUF1 AND MARKINDX IS DECREMENTED.
#
# MARK REJECTS ARE PROCESSED BY THE ROUTINE MARKRUPT AS FOLLOWS:
# IF MARKFLG IS CLEAR (I.E., NO MARK WAS TAKEN), ALARM CODE 110 IS SENT AND THE ROUTINE EXITS.
# OTHERWISE, MARKINDX IS INCREMENTED, THE P22 INDICATORS 8NN AND P22DEX ARE DECREMENTED
# (IF THE USER IS P22), AND THE V51FL DISPLAY IN SXTMARK IS REESTABLISHED.
#
# IF THE ERASABLE REGISTER CDUCHKWD IS SET TO A NON-ZERO VALUE, VALIDITY OF THE MARKS IS CHECKED
# BY THE MARKRUPT ROUTINE AS FOLLOWS:
# IF THE CDU'S CHANGE BY MORE THAN 3 BITS OVER THE TIME PERIOD INDICATED BY THE VALUE OF
# CDUCHKWD, ALARM CODE 121 IS SENT AND THE ROUTINE EXITS.
#
# CALLING SEQUENCE -
#
# TC BANKCALL
# CADR SXTMARK
#
## Page 240
# NORMAL EXIT MODE -
#
# RETURN TO USER VIA BANKJUMP (RETURN ADDRESS IN OPTCADR).
#
#
# ALARM OR ABORT EXIT MODES
#
# 1. ALARM 110 - MARK REJECT WITH NO MARK
# 2. ALARM 113 - NO INBITS
# 3. ALARM 121 - CDU'S NO GOOD AT MARK TIME
# 4. ALARM 114 - MARK MADE BUT NOT DESIRED
# 5. BAILOUT 31211 - MARK DISPLAY SYSTEM BUSY
#
#
# ERASABLE INITIALIZATION REQUIRED -
#
# NONE
#
#
# OUTPUT -
#
# FOR P22:
# MARK DATA IN SVMRKDAT
# MARKINDX DECREMENTED BY ONE FOR EACH MARK TAKEN
# NO. OF MARKS IN 8NN
# FOR R57:
# MARK DATA IN MARKDOWN AND MRKBUF1
# FOR OTHER USERS:
# MARKINDX DECREMENTED TO ZERO IF A MARK WAS TAKEN
# MARK DATA IN MRKBUF1
#
#
# CONDITIONS AT EXIT -
#
# MARKINDX = INITIAL VALUE - NO. MARKS TAKEN
# MARKING SYSTEM IS RELEASED :
# EXTVBACT = 0
# BIT 9 OPTMODES = 0
# OPTIND = -1
# BIT 2 CHAN12 = 0
# MARKFLG = 0
# OPTCADR CONTAINS CADR OF SXTMARK CALLER
#
## Page 241
SETLOC SXTMARKE
BANK
EBANK= MRKBUF1
COUNT* $$/SXTMK
SXTMARK TC TESTMARK
TC CHECKMM # IS THIS P24
MM 24
TCF +2 # NO
TCF SXTMRKA # YES
TC CHECKMM
MM 22
TCF SETMRK
SXTMRKA CAF ZERO # INITIALIZE MARK COUNTER
TS 8NN
TS P22DEX
CAF FIVE # 5 MARKS FOR P22, ONE FOR ALL OTHERS
TCF SETMRK +1
SETMRK CAF ONE
TS MARKINDX
TC MAKECADR # STORE RETURN TO USER WHO CALLED
TS OPTCADR # SXTMARK IN OPTCADR
MKVB51 TC BANKCALL # CLEAR DISPLAY FOR MARK VERB
CADR KLEENEX
MKVBDSP CAF VB51 # DISPLAY MARK VERB 51
+1 TC BANKCALL
CADR GOMARK4
TCF TERMSXT # VB34-TERMINATE
TCF ENTANSWR # V33-PROCEED-MARKING DONE
TCF MKVB5X # ENTER-RECYCLE TO INITIAL MARK DISPLAY
TERMSXT TC CLEARMRK # CLEAR MARK ACTIVITY.
TC MKRLEES
TC CHECKMM
MM 03
TCF +2
TC TERMP03
TC GOTOPOOH
TERMP03 TC POSTJUMP
CADR GCOMP5
ENTANSWR CAF PRIO24
TC NOVAC
## Page 242
EBANK= WHOCARES
2CADR ENDEXT
CAF PRIO13 # ALLOW LEFTOVER SLEEPING JOB IF ANY
TC PRIOCHNG
MKVRET CA OPTCADR # OPTCADR HAS RETURN CADR OF USER WHO
TC BANKJUMP # CALLED SXTMARK
MKVB5X CCS MARKINDX # REDISPLAY VB51 IF MORE MARKS WANTED
TCF MKVB51
MKVB50 CAF R1D1 # OCT 16
TS DSPTEM1
CAF V50N25 # DISPLAY V50N25 IF MARKING DONE.
TCF MKVBDSP +1
V50N25 VN 5025
VB51 VN 5100
TESTMARK CAF SIX
MASK EXTVBACT
CCS A
TCF MKABORT
CAF BIT2
ADS EXTVBACT
TC Q
MKABORT TC BAILOUT
OCT 31211
MKRELEAS EQUALS MKRLEES
MKRLEES INHINT
CA NEGONE
TS OPTIND # KILL COARS OPTICS
CAF ZERO
TS MARKINDX
CS MARKBIT
MASK FLAGWRD1
TS FLAGWRD1
RELINT
TC Q
## Page 243
MARKRUPT TS BANKRUPT # STORE CDUS AND OPTICS NOW
CA CDUT
TS MKCDUT
CA CDUS
TS MKCDUS
CA CDUY
TS MKCDUY
CA CDUZ
TS MKCDUZ
CA CDUX
TS MKCDUX
EXTEND
DCA TIME2 # GET TIME
DXCH MKT2T1
EXTEND
DCA MKT2T1
DXCH SAMPTIME # RUPT TIME FOR NOUN 65.
XCH Q
TS QRUPT
CAF BIT6 # SEE IF MARK OR MKREJECT
EXTEND
RAND NAVKEYIN
CCS A
TC MARKIT # ITS A MARK
CAF BIT7 # NOT A MARK, SEE IF MKREJECT
EXTEND
RAND NAVKEYIN
CCS A
TC MKREJECT # ITS A MARK REJECT
KEYCALL CAF OCT37 # NOT MARK OR MKREJECT, SEE IF KEYCODE
EXTEND
RAND NAVKEYIN
EXTEND
BZF +3 # IF NO INBITS
TC POSTJUMP
CADR KEYCOM # IT,S A KEY CODE, NOT A MARK.
+3 TC ALARM # ALARM IF NO INBITS
OCT 113
TC RESUME
## Page 244
# PROGRAM NAME - MARKIT DATE- 19 SEPT 1967
#
# CALLING SEQUENCE
# FROM MARKRUPT IF CHAN 16 BIT 6 = 1
#
# EXIT
# RESUME
#
# INPUT
# CDUCHKWD. ALSO ALL INITIALIZATION FOR MARKCONT
#
# OUTPUT
# MKT2T1,MKCDUX,MKCDUY,MKCDUZ,MKCDUS,MKCDUT
#
# ALARM EXIT
# NONE
MARKIT CCS CDUCHKWD
TCF +3 # DELAY OF CDUCHKWD CS IF PNZ
TCF +2
CAF ZERO
AD ONE # 10 MS IF NO CHECK
TC WAITLIST
EBANK= MRKBUF1
2CADR MARKDIF
TCF RESUME
MARKDIF CAF P24BIT # IS THIS P24
MASK FLAGWRD9
CCS A
TCF MARKCONT # YES ACCEPT MARK
CA CDUCHKWD # IF DELAY CHECK IS ZERO OR NEG, ACP MARK
EXTEND
BZMF MARKCONT
CS BIT1
TS MKNDX # SET INDEX -1
CA MKCDUX
TC DIFCHK # SEE IF VEHICLE RATE TO MUCH AT MARK
CA MKCDUY
TC DIFCHK
CA MKCDUZ
TC DIFCHK
MARKCONT CAF R21BIT # R21 MARKING
MASK FLAGWRD2
CCS A
TCF PUTMARK # YES
CAF V59FLBIT
## Page 245
MASK FLAGWRD5 # V59FLAG
CCS A
TCF DOWNMRK
CCS MARKINDX # MARKS CALLED FOR
TCF MARK2 # YES
114ALM TC ALARM
OCT 114 # MARKS NOT CALLED FOR
TC TASKOVER
MARK2 TS MARKINDX # DECREMENT NO. MARKS WANTED
TC UPFLAG
ADRES MARKFLG # SET FLAG TO ENABLE REJECT
TC CHECKMM # IS THIS P24
MM 24
TCF MRKCHK22 # NO
INCR MARKINDX # RESTORE THIS REGISTER
TC UPFLAG
ADRES P22MKFLG # DOWNLINK CONTAINS P24 MARKS
TC UPFLAG
ADRES P24MKFLG # NEW P24MARK TAKEN
TCF VACSTOR -1
MRKCHK22 TC CHECKMM
MM 22
TCF PUTMARK
-1 INCR 8NN # NO, MARKS TAKEN.
VACSTOR EXTEND
DCA MKT2T1
INDEX P22DEX
DXCH SVMRKDAT
EXTEND
DCA MKCDUY
INDEX P22DEX
DXCH SVMRKDAT +2
EXTEND
DCA MKCDUZ
INDEX P22DEX
DXCH SVMRKDAT +4
CA MKCDUX
INDEX P22DEX
TS SVMRKDAT +6
TC CHECKMM # IS THIS P24
MM 24
TCF INDINC # NO
CS OCT34 # YES DEC 28
AD P22DEX
## Page 246
EXTEND # ARE THERE ANY MORE LOC LEFT IN MARK
BZF +2 # DOWNLINK BUFFER
TCF INDINC # YES
CA ZERO # REINITIALIZE INDEX FOR
TS P22DEX # BEGINNING OF BUFFER
TCF MARKDONE
INDINC CAF SEVEN
ADS P22DEX
MARKDONE CCS MARKINDX # ANY MORE MARKS TO BE TAKEN
TCF TASKOVER
CAF PRIO22
TC FINDVAC
EBANK= MRKBUF1
2CADR MKVB5X
TCF TASKOVER
DOWNMRK CAF SIX # FOR CALIBRATION MARK
TC GENTRAN
ADRES MKT2T1
ADRES MARKDOWN
CAF PRIO5
TC NOVAC
EBANK= MRKBUF1
2CADR MARKDISP
PUTMARK CAF SIX
TC GENTRAN
ADRES MKT2T1
ADRES MRKBUF1
CAF R21BIT # DONT CALL VB50 DISPLAY FOR R21
MASK FLAGWRD2
CCS A
TCF TASKOVER
TCF MARKDONE
DIFCHK INCR MKNDX # INCREMENT INDEX
EXTEND
INDEX MKNDX
MSU CDUX # GET MARK(ICDU) - CURRENT(ICDU)
CCS A
TCF +4
TC Q
TCF +2
TC Q
## Page 247
AD NEG2 # SEE IF DIFFERENCE GREATER THAN 3 BITS
EXTEND
BZMF -3 # NOT GREATER
TC ALARM # COUPLED WITH PROGRAM ALARM
OCT 00121
TCF TASKOVER # DO NOT ACCEPT
MKREJECT CAF R21BIT
MASK FLAGWRD2 # R21 MARK (SPECIAL MARKING FOR R21)
EXTEND
BZF MRKREJCT # NOT SET THEREFORE REGULAR REJECT
CA MRKBUF1 # IS THERE A MARK IN THE BUFFER?
EXTEND
BZF +3 # YES - REJECT MARK IN BUFFER
EXTEND
BZMF REJCTR22 # NO,SET FLAG TO REJECT MARK PROCESSED-R22
CA NEGONE # -1 (FOR R22)
TS MRKBUF1 # -0 IN TIME IS FLAG TO R22 SIGNIFYING A
TC RESUME
REJCTR22 CAF R22CABIT # IS R22 PROCESSING A MARK?
MASK FLAGWRD9
EXTEND
BZF RESUME # NO IGNORE MARK REJECT
TC UPFLAG
ADRES REJCTFLG # YES - SET FLAG FOR R22
TC RESUME
MRKREJCT CAF MARKBIT
MASK FLAGWRD1
CCS A
TC REJECT3
TC ALARM # DONT ACCEPT TWO REJECTS TOGETHER
OCT 110
TC RESUME
REJECT3 TC DOWNFLAG
ADRES MARKFLG
TC CHECKMM # IS THIS P24
MM 24
TCF REJECT4 # NO
TC DOWNFLAG # YES
ADRES P24MKFLG
## Page 248
CCS P22DEX # IS MARK TO BE REJ, THE LAST MARK IN BUF
TCF +3 # NO
CA OCT34 # YES
TCF +3
CS SEVEN
AD P22DEX
REJECT5 TS RUPTREG1
EXTEND
INDEX RUPTREG1
DCS SVMRKDAT
INDEX RUPTREG1
DXCH SVMRKDAT
TCF REJEXIT
REJECT4 INCR MARKINDX # CALL FOR ANOTHER MARK
TC CHECKMM
MM 22
TCF REJEXIT
CS ONE # FOR P22
ADS 8NN
CS SEVEN
ADS P22DEX # DECREMENT P22 INDEX
TCF REJECT5
REJEXIT CAF PRIO22
TC FINDVAC
EBANK= MRKBUF1
2CADR MKVBDSP
TCF RESUME
