Source Code
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These source-code files are part of a reconstructed copy of Artemis 071, the
first release of the Apollo 15 through 17 Command Module (CM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with source code of Artemis 072 previously transcribed
from a digitized copy of that program. The code was then updated by undoing
changes between the two versions. The reconstruction was verified by matching
memory-bank checksums to those listed in drawing 2021154-. Note that page
numbers in the reconstructed code match those on the Artemis 072 printout,
although the changed code would likely have changed page numbers for a real
Artemis 071 listing.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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060435,000002: ## Copyright: Public domain.
060436,000003: ## Filename: RESTARTS_ROUTINE.agc
060437,000004: ## Purpose: A section of Artemis revision 071.
060438,000005: ## It is part of the reconstructed source code for the first
060439,000006: ## release of the flight software for the Command Module's
060440,000007: ## (CM) Apollo Guidance Computer (AGC) for Apollo 15 through
060441,000008: ## 17. The code has been recreated from a copy of Artemis 072.
060442,000009: ## It has been adapted such that the resulting bugger words
060443,000010: ## exactly match those specified for Artemis 071 in NASA
060444,000011: ## drawing 2021154-, which gives relatively high confidence
060445,000012: ## that the reconstruction is correct.
060446,000013: ## Reference: 1411
060447,000014: ## Assembler: yaYUL
060448,000015: ## Contact: Ron Burkey <info@sandroid.org>.
060449,000016: ## Website: www.ibiblio.org/apollo/index.html
060450,000017: ## Mod history: 2019-08-14 MAS Created from Artemis 072.
060451,000018:
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Page 1411
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060453,000020: 01,2000 SETLOC RESTART
060454,000021: 01,2000 BANK
060455,000022:
060456,000023: 01,3467 E3,1436 EBANK= PHSNAME1 # GOPROG MUST SWITCH TO THIS EBANK
060457,000024:
060458,000025: 01,3467 COUNT* $$/RSROU
060459,000026: 01,3467 30161 RESTARTS CA MPAC +5 # GET GROUP NUMBER -1
060460,000027: 01,3470 60000 DOUBLE # SAVE FOR INDEXING
060461,000028: 01,3471 54155 TS TEMP2G
060462,000029:
060463,000030: 01,3472 33127 CA PHS2CADR # SET UP EXIT IN CASE IT IS AN EVEN
060464,000031: 01,3473 54157 TS TEMPSWCH # TABLE PHASE
060465,000032:
060466,000033: 01,3474 33526 CA RTRNCADR # TO SAVE TIME ASSUME IT WILL GET NEXT
060467,000034: 01,3475 54707 TS GOLOC +2 # GROUP AFTER THIS
060468,000035:
060469,000036: 01,3476 30154 CA TEMPPHS
060470,000037: 01,3477 75024 MASK OCT1400
060471,000038: 01,3500 10000 CCS A # IS IT A VARIABLE OR TABLE RESTART
060472,000039: 01,3501 13512 TCF ITSAVAR # IT:S A VARIABLE RESTART
060473,000040:
060474,000041: 01,3502 10154 GETPART2 CCS TEMPPHS # IS IT AN X.1 RESTART
060475,000042: 01,3503 10000 CCS A
060476,000043: 01,3504 13612 TCF ITSATBL # NO, ITS A TABLE RESTART
060477,000044:
060478,000045: 01,3505 35053 CA PRIO14 # IT IS AN X.1 RESTART, THEREFORE START
060479,000046: 01,3506 05135 FVACCADR TC FINDVAC # THE DISPLAY RESTART ROUTINE (=GENADR)
060480,000047: 01,3507 E3,1400 EBANK= LST1
060481,000048: 01,3507 03263 20063 2CADR INITDSP
060482,000049:
060483,000050:
060484,000051: 01,3511 03526 TC RTRNCADR # FINISHED WITH THIS GROUP, GET NEXT ONE
060485,000052:
060486,000053: 01,3512 75024 ITSAVAR MASK OCT1400 # IS IT TYPE B ?
060487,000054: 01,3513 10000 CCS A
060488,000055: 01,3514 13563 TCF ITSLIKEB # YES, IT IS TYPE B
060489,000056:
060490,000057: 01,3515 00006 EXTEND # STORE THE JOB (OR TASK) 2CADR FOR EXIT
060491,000058: 01,3516 50155 NDX TEMP2G
060492,000059: 01,3517 31437 DCA PHSNAME1
060493,000060: 01,3520 52706 DXCH GOLOC
060494,000061:
060495,000062: 01,3521 30154 CA TEMPPHS # SEE IF THIS IS A JOB, TASK, OR A LONGCAL
060496,000063: 01,3522 74774 MASK OCT7
060497,000064: 01,3523 67701 AD MINUS2
060498,000065: 01,3524 10000 CCS A
060499,000066: 01,3525 13675 TCF ITSLNGCL # ITS A LONGCALL
060500,000067:
060501,000068: 01,3526 04651 RTRNCADR TC SWRETURN # CANT GET HERE
060502,000069: 01,3527 13531 TCF ITSAWAIT
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Page 1412
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060504,000071: 01,3530 13576 TCF ITSAJOB # ITS A JOB
060505,000072:
060506,000073: 01,3531 33463 ITSAWAIT CA WTLTCADR # SET UP WAITLIST CALL
060507,000074: 01,3532 54704 TS GOLOC -1
060508,000075:
060509,000076: 01,3533 50155 NDX TEMP2G # DIRECTLY STORED
060510,000077: 01,3534 31260 CA PHSPRDT1
060511,000078: 01,3535 10000 TIMETEST CCS A # IS IT AN IMMEDIATE RESTART
060512,000079: 01,3536 24000 INCR A # NO,
060513,000080: 01,3537 13542 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
060514,000081:
060515,000082: 01,3540 15470 TCF ITSINDIR # STORED INDIRECTLY
060516,000083:
060517,000084: 01,3541 13561 TCF IMEDIATE # IT WANTS AN IMMEDIATE RESTART
060518,000085:
060519,000086: # ***** THIS MUST BE IN FIXED FIXED *****
060520,000087:
060521,000088: 4000 SETLOC FFTAG2
060522,000089: 4000 BANK
060523,000090:
060524,000091: 5470 COUNT* $$/RSROU
060525,000092: 5470 22706 ITSINDIR LXCH GOLOC +1 # GET THE CORRECT E BANK IN CASE THIS IS
060526,000093: 5471 22006 LXCH BB # SWITCHED ERRASIBLE
060527,000094:
060528,000095: 5472 50000 NDX A # GET THE TIME INDIRECTLY
060529,000096: 5473 30001 CA 1
060530,000097:
060531,000098: 5474 22006 LXCH BB # RESTORE THE BB AND GOLOC
060532,000099: 5475 22706 LXCH GOLOC +1
060533,000100:
060534,000101: 5476 13542 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
060535,000102:
060536,000103: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
060537,000104:
060538,000105: 01,2000 SETLOC RESTART
060539,000106: 01,2000 BANK
060540,000107:
060541,000108: 01,3542 COUNT* $$/RSROU
060542,000109: 01,3542 40000 FINDTIME COM # MAKE NEGITIVE SINCE IT WILL BE SUBTRACTD
060543,000110: 01,3543 54001 TS L # AND SAVE
060544,000111: 01,3544 50155 NDX TEMP2G
060545,000112: 01,3545 41257 CS TBASE1
060546,000113: 01,3546 00006 EXTEND
060547,000114: 01,3547 60025 SU TIME1
060548,000115: 01,3550 10000 CCS A
060549,000116: 01,3551 40000 COM
060550,000117: 01,3552 67663 AD OCT37776
060551,000118: 01,3553 64770 AD ONE
060552,000119: 01,3554 60001 AD L
060553,000120: 01,3555 10000 CCS A
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Page 1413
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060555,000122: 01,3556 34772 -3 CAF ZERO
060556,000123: 01,3557 13561 TCF +2
060557,000124: 01,3560 13561 TCF +1
060558,000125: 01,3561 64770 IMEDIATE AD ONE
060559,000126: 01,3562 00704 TC GOLOC -1
060560,000127: 01,3563 33526 ITSLIKEB CA RTRNCADR # TYPE B, SO STORE RETURN IN
060561,000128: 01,3564 54157 TS TEMPSWCH # TEMPSWCH IN CASE OF AN EVEN PHASE
060562,000129:
060563,000130: 01,3565 33133 CA PRT2CADR # SET UP EXIT TO GET TABLE PART OF THIS
060564,000131: 01,3566 54707 TS GOLOC +2 # VARIABLE TYPE OF PHASE
060565,000132:
060566,000133: 01,3567 30154 CA TEMPPHS # MAKE THE PHASE LOOK RIGHT FOR THE TABLE
060567,000134: 01,3570 76043 MASK OCT177 # PART OF THIS VARIABLE PHASE
060568,000135: 01,3571 54154 TS TEMPPHS
060569,000136:
060570,000137: 01,3572 00006 EXTEND
060571,000138: 01,3573 50155 NDX TEMP2G # OBTAIN THE JOB:S 2CADR
060572,000139: 01,3574 31437 DCA PHSNAME1
060573,000140: 01,3575 52706 DXCH GOLOC
060574,000141:
060575,000142: 01,3576 50155 ITSAJOB NDX TEMP2G # NOW ADD THE PRIORITY AND LET:S GO
060576,000143: 01,3577 31260 CA PHSPRDT1
060577,000144: 01,3600 54704 CHKNOVAC TS GOLOC -1 # SAVE PRIO UNTIL WE SEE IF ITS
060578,000145: 01,3601 00006 EXTEND # A FINDVAC OR A NOVAC
060579,000146: 01,3602 63606 BZMF ITSNOVAC
060580,000147:
060581,000148: 01,3603 33506 CAF FVACCADR # POSITIVE, SET UP FINDVAC CALL.
060582,000149: 01,3604 56704 XCH GOLOC -1 # PICK UP PRIO,
060583,000150: 01,3605 00704 TC GOLOC -1 # AND GO
060584,000151:
060585,000152: 01,3606 35310 ITSNOVAC CAF NOVACADR # NEGATIVE,
060586,000153: 01,3607 56704 XCH GOLOC -1 # SET UP NOVAC CALL,
060587,000154: 01,3610 40000 COM # CORRECT PRIO,
060588,000155: 01,3611 00704 TC GOLOC -1 # AND GO
060589,000156:
060590,000157: 01,3612 54020 ITSATBL TS CYR # FIND OUT IF THE PHASE IS ODD OR EVEN
060591,000158: 01,3613 10020 CCS CYR
060592,000159: 01,3614 13615 TCF +1 # IT:S EVEN
060593,000160: 01,3615 13713 TCF ITSEVEN
060594,000161:
060595,000162: 01,3616 33526 CA RTRNCADR # IN CASE THIS IS THE SECOND PART OF A
060596,000163: 01,3617 54707 TS GOLOC +2 # TYPE B RESTART, WE NEED PROPER EXIT
060597,000164:
060598,000165: 01,3620 30154 CA TEMPPHS # SET UP POINTER FOR FINDING OUR PLACE IN
060599,000166: 01,3621 54021 TS SR # THE RESTART TABLES
060600,000167: 01,3622 60021 AD SR
060601,000168: 01,3623 50155 NDX TEMP2G
060602,000169: 01,3624 62001 AD SIZETAB +1
060603,000170: 01,3625 54156 TS POINTER
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Page 1414
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060605,000172:
060606,000173: 01,3626 00006 CONTBL2 EXTEND # FIND OUT WHAT:S IN THE TABLE
060607,000174: 01,3627 50156 NDX POINTER
060608,000175: 01,3630 32002 DCA CADRTAB # GET THE 2CADR
060609,000176:
060610,000177: 01,3631 22706 LXCH GOLOC +1 # STORE THE BB INFORMATION
060611,000178:
060612,000179: 01,3632 10000 CCS A # IS IT A JOB OR IS IT TIMED
060613,000180: 01,3633 24000 INCR A # POSITIVE, MUST BE A JOB
060614,000181: 01,3634 13707 TCF ITSAJOB2
060615,000182:
060616,000183: 01,3635 24000 INCR A # MUST BE EITHER A WAITLIST OR LONGCALL
060617,000184: 01,3636 54705 TS GOLOC # LET-S STORE THE CORRECT CADR
060618,000185:
060619,000186: 01,3637 33463 CA WTLTCADR # SET UP OUR EXIT TO WAITLIST
060620,000187: 01,3640 54704 TS GOLOC -1
060621,000188:
060622,000189: 01,3641 30706 CA GOLOC +1 # NOW FIND OUT IF IT IS A WAITLIST CALL
060623,000190: 01,3642 74757 MASK BIT10 # THIS SHOULD BE ONE IF WE HAVE -BB
060624,000191: 01,3643 10000 CCS A # FOR THAT MATTER SO SHOULD BE BITS 9,8,7,
060625,000192: # 6,5, AND LAST BUT NOT LEAST (PERHAPS NOT
060626,000193: # IN IMPORTANCE ANYWAY. BIT 4
060627,000194: 01,3644 13702 TCF ITSWTLST # IT IS A WAITLIST CALL
060628,000195:
060629,000196: 01,3645 50156 NDX POINTER # OBTAIN THE ORIGINAL DELTA T
060630,000197: 01,3646 32000 CA PRDTTAB # ADDRESS FOR THIS LONGCALL
060631,000198:
060632,000199: 01,3647 15477 TCF ITSLGCL1 # NOW GO GET THE DELTA TIME
060633,000200:
060634,000201: # ***** THIS MUST BE IN FIXED FIXED *****
060635,000202:
060636,000203: 4000 SETLOC FFTAG2
060637,000204: 4000 BANK
060638,000205:
060639,000206: 5477 COUNT* $$/RSROU
060640,000207: 5477 22706 ITSLGCL1 LXCH GOLOC +1 # OBTAIN THE CORRECT E BANK
060641,000208: 5500 22006 LXCH BB
060642,000209: 5501 22706 LXCH GOLOC +1 # AND PRESERVE OUR E AND F BANKS
060643,000210:
060644,000211: 5502 00006 EXTEND # GET THE DELTA TIME
060645,000212: 5503 50000 NDX A
060646,000213: 5504 30001 DCA 0
060647,000214: 5505 22706 LXCH GOLOC +1 # RESTORE OUR E AND F BANK
060648,000215: 5506 22006 LXCH BB # RESTORE THE TASKS E AND F BANKS
060649,000216: 5507 22706 LXCH GOLOC +1 # AND PRESERVE OUR L
060650,000217:
060651,000218: 5510 13650 TCF ITSLGCL2 # NOW LET:S PROCESS THIS LONGCALL
060652,000219:
060653,000220: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
060654,000221:
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Page 1415
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060656,000223: 01,2000 SETLOC RESTART
060657,000224: 01,2000 BANK
060658,000225:
060659,000226: 01,3650 COUNT* $$/RSROU
060660,000227: 01,3650 53305 ITSLGCL2 DXCH LONGTIME
060661,000228:
060662,000229: 01,3651 00006 EXTEND # CALCULATE TIME LEFT
060663,000230: 01,3652 40025 DCS TIME2
060664,000231: 01,3653 21305 DAS LONGTIME
060665,000232: 01,3654 00006 EXTEND
060666,000233: 01,3655 31303 DCA LONGBASE
060667,000234: 01,3656 21305 DAS LONGTIME
060668,000235:
060669,000236: 01,3657 11304 CCS LONGTIME # FIND OUT HOW THIS SHOULD BE RESTARTED
060670,000237: 01,3660 13670 TCF LONGCLCL
060671,000238: 01,3661 13663 TCF +2
060672,000239: 01,3662 13556 TCF IMEDIATE -3
060673,000240: 01,3663 11305 CCS LONGTIME +1
060674,000241: 01,3664 13670 TCF LONGCLCL
060675,000242: 01,3665 13666 NOOP # CAN:T GET HERE *********
060676,000243: 01,3666 13556 TCF IMEDIATE -3
060677,000244: 01,3667 13561 TCF IMEDIATE
060678,000245:
060679,000246: 01,3670 33137 LONGCLCL CA LGCLCADR # WE WILL GO TO LONGCALL
060680,000247: 01,3671 54704 TS GOLOC -1
060681,000248:
060682,000249: 01,3672 00006 EXTEND # PREPARE OUR ENTRY TO LONGCALL
060683,000250: 01,3673 31305 DCA LONGTIME
060684,000251: 01,3674 00704 TC GOLOC -1
060685,000252:
060686,000253: 01,3675 33463 ITSLNGCL CA WTLTCADR # ASSUME IT WILL GO TO WAITLIST
060687,000254: 01,3676 54704 TS GOLOC -1
060688,000255:
060689,000256: 01,3677 50155 NDX TEMP2G
060690,000257: 01,3700 41260 CS PHSPRDT1 # GET THE DELTA T ADDRESS
060691,000258:
060692,000259: 01,3701 15477 TCF ITSLGCL1 # NOW GET THE DELTA TIME
060693,000260:
060694,000261: 01,3702 40706 ITSWTLST CS GOLOC +1 # CORRECT THE BBCON INFORMATION
060695,000262: 01,3703 54706 TS GOLOC +1
060696,000263:
060697,000264: 01,3704 50156 NDX POINTER # GET THE DT AND FIND OUT IF IT WAS STORED
060698,000265: 01,3705 32000 CA PRDTTAB # DIRECTLY OR INDIRECTLY
060699,000266:
060700,000267: 01,3706 13535 TCF TIMETEST # FIND OUT HOW THE TIME IS STORED
060701,000268:
060702,000269: 01,3707 56705 ITSAJOB2 XCH GOLOC # STORE THE CADR
060703,000270:
060704,000271: 01,3710 50156 NDX POINTER # ADD THE PRIORITY AND LET:S GO
060705,000272: 01,3711 32000 CA PRDTTAB
060706,000273:
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Page 1416
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060708,000275: 01,3712 13600 TCF CHKNOVAC
060709,000276:
060710,000277: 01,3713 30157 ITSEVEN CA TEMPSWCH # SET UP FOR EITHER THE SECOND PART OF THE
060711,000278: 01,3714 54707 TS GOLOC +2 # TABLE, OR A RETURN FOR THE NEXT GROUP
060712,000279:
060713,000280: 01,3715 50155 NDX TEMP2G # SET UP POINTER FOR OUR LOCATION WITHIN
060714,000281: 01,3716 32000 CA SIZETAB # THE TABLE
060715,000282: 01,3717 60154 AD TEMPPHS # THIS MAY LOOK BAD BUT LET:S SEE YOU DO
060716,000283: 01,3720 60154 AD TEMPPHS # BETTER IN TIME OR NUMBERR OF LOCATIONS
060717,000284: 01,3721 60154 AD TEMPPHS
060718,000285: 01,3722 54156 TS POINTER
060719,000286:
060720,000287: 01,3723 13626 TCF CONTBL2 # NOW PROCESS WHAT IS IN THE TABLE
060721,000288:
060722,000289: 01,3724 36214 PHSPART2 CA THREE # SET THE POINTER FOR THE SECOND HALF OF
060723,000290: 01,3725 26156 ADS POINTER # THE TABLE
060724,000291:
060725,000292: 01,3726 33526 CA RTRNCADR # THIS WILL BE OUR LAST TIME THROUGH THE
060726,000293: 01,3727 54707 TS GOLOC +2 # EVEN TABLE, SO AFTER IT GET THE NEXT
060727,000294: # GROUP
060728,000295: 01,3730 13626 TCF CONTBL2 # SO LET:S GET THE SECOND ENTRY IN THE TBL
060729,000296:
060730,000297: 01,3731 0154 TEMPPHS EQUALS MPAC
060731,000298: 01,3731 0155 TEMP2G EQUALS MPAC +1
060732,000299: 01,3731 0156 POINTER EQUALS MPAC +2
060733,000300: 01,3731 0157 TEMPSWCH EQUALS MPAC +3
060734,000301: 01,3731 7701 MINUS2 EQUALS NEG2
060735,000302: 01,3731 6043 OCT177 EQUALS LOW7
060736,000303:
End of include-file RESTARTS_ROUTINE.agc. Parent file is MAIN.agc