Source Code
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These source-code files are part of a reconstructed copy of Luminary 96, the
original release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with reconstructed source code for Luminary 97. Changes
between revisions 96 and 97 were backed out, as described by anomal report LNY-59.
transcribed from a digitized copy of that program. The reconstruction was
verified by matching memory-bank checksums to those listed in drawing 2021152D.
Note that page numbers in the reconstructed code match those on the Luminary 099
revision 001 printout, although the added code would likely have changed page
numbers for a real Luminary 96 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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054710,000002: ## Copyright: Public domain.
054711,000003: ## Filename: RESTARTS_ROUTINE.agc
054712,000004: ## Purpose: A section of Luminary revision 96.
054713,000005: ## It is part of the reconstructed source code for the
054714,000006: ## original release of the flight software for the Lunar
054715,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
054716,000008: ## The code has been recreated from a previously reconstructed
054717,000009: ## copy of Luminary 97 by undoing changes described in anomaly
054718,000010: ## report LNY-59. The code has been adapted such that the
054719,000011: ## resulting bugger words exactly match those specified for
054720,000012: ## Luminary 96 in NASA drawing 2021152D, which gives relatively
054721,000013: ## high confidence that the reconstruction is correct.
054722,000014: ## Reference: pp. 1303-1308
054723,000015: ## Assembler: yaYUL
054724,000016: ## Contact: Ron Burkey <info@sandroid.org>.
054725,000017: ## Website: www.ibiblio.org/apollo/index.html
054726,000018: ## Mod history: 2019-08-04 MAS Created from Luminary 97.
054727,000019:
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Page 1303
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054729,000021: 01,3526 BANK 01
054730,000022: 01,2000 SETLOC RESTART
054731,000023: 01,2000 BANK
054732,000024:
054733,000025: 01,3526 E3,1436 EBANK= PHSNAME1 # GOPROG MUST SWITCH TO THIS EBANK
054734,000026:
054735,000027: 01,3526 COUNT* $$/RSROU
054736,000028: 01,3526 30161 RESTARTS CA MPAC +5 # GET GROUP NUMBER -1
054737,000029: 01,3527 60000 DOUBLE # SAVE FOR INDEXING
054738,000030: 01,3530 54155 TS TEMP2G
054739,000031:
054740,000032: 01,3531 33770 CA PHS2CADR # SET UP EXIT IN CASE IT IS AN EVEN
054741,000033: 01,3532 54157 TS TEMPSWCH # TABLE PHASE
054742,000034:
054743,000035: 01,3533 33565 CA RTRNCADR # TO SAVE TIME ASSUME IT WILL GET NEXT
054744,000036: 01,3534 54707 TS GOLOC +2 # GROUP AFTER THIS
054745,000037:
054746,000038: 01,3535 30154 CA TEMPPHS
054747,000039: 01,3536 75007 MASK OCT1400
054748,000040: 01,3537 10000 CCS A # IS IT A VARIABLE OR TABLE RESTART
054749,000041: 01,3540 13551 TCF ITSAVAR # IT:S A VARIABLE RESTART
054750,000042:
054751,000043: 01,3541 10154 GETPART2 CCS TEMPPHS # IS IT AN X.1 RESTART
054752,000044: 01,3542 10000 CCS A
054753,000045: 01,3543 13651 TCF ITSATBL # NO, ITS A TABLE RESTART
054754,000046:
054755,000047: 01,3544 35024 CA PRIO14 # IT IS AN X.1 RESTART, THEREFORE START
054756,000048: 01,3545 05105 TC FINDVAC # THE DISPLAY RESTART JOB
054757,000049: 01,3546 E3,1400 EBANK= LST1
054758,000050: 01,3546 03037 20103 2CADR INITDSP
054759,000051:
054760,000052: 01,3550 03565 TC RTRNCADR # FINISHED WITH THIS GROUP, GET NEXT ONE
054761,000053:
054762,000054: 01,3551 75007 ITSAVAR MASK OCT1400 # IS IT TYPE B ?
054763,000055: 01,3552 10000 CCS A
054764,000056: 01,3553 13622 TCF ITSLIKEB # YES, IT IS TYPE B
054765,000057:
054766,000058: 01,3554 00006 EXTEND # STORE THE JOB (OR TASK) 2CADR FOR EXIT
054767,000059: 01,3555 50155 NDX TEMP2G
054768,000060: 01,3556 31437 DCA PHSNAME1
054769,000061: 01,3557 52706 DXCH GOLOC
054770,000062:
054771,000063: 01,3560 30154 CA TEMPPHS # SEE IF THIS IS A JOB, TASK, OR A LONGCAL
054772,000064: 01,3561 74757 MASK OCT7
054773,000065: 01,3562 67746 AD MINUS2
054774,000066: 01,3563 10000 CCS A
054775,000067: 01,3564 13734 TCF ITSLNGCL # ITS A LONGCALL
054776,000068:
054777,000069: 01,3565 04631 RTRNCADR TC SWRETURN # CANT GET HERE
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Page 1304
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054779,000071: 01,3566 13570 TCF ITSAWAIT
054780,000072:
054781,000073: 01,3567 13635 TCF ITSAJOB # ITS A JOB
054782,000074:
054783,000075: 01,3570 33774 ITSAWAIT CA WTLTCADR # SET UP WAITLIST CALL
054784,000076: 01,3571 54704 TS GOLOC -1
054785,000077:
054786,000078: 01,3572 50155 NDX TEMP2G # DIRECTLY STORED
054787,000079: 01,3573 31054 CA PHSPRDT1
054788,000080: 01,3574 10000 TIMETEST CCS A # IS IT AN IMMEDIATE RESTART
054789,000081: 01,3575 24000 INCR A # NO,
054790,000082: 01,3576 13601 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
054791,000083:
054792,000084: 01,3577 15436 TCF ITSINDIR # STORED INDIRECTLY
054793,000085:
054794,000086: 01,3600 13620 TCF IMEDIATE # IT WANTS AN IMMEDIATE RESTART
054795,000087:
054796,000088: # ***** THIS MUST BE IN FIXED FIXED *****
054797,000089:
054798,000090: 5436 BLOCK 02
054799,000091: 4000 SETLOC FFTAG2
054800,000092: 4000 BANK
054801,000093:
054802,000094: 5436 COUNT* $$/RSROU
054803,000095: 5436 22706 ITSINDIR LXCH GOLOC +1 # GET THE CORRECT E BANK IN CASE THIS IS
054804,000096: 5437 22006 LXCH BB # SWITCHED ERRASIBLE
054805,000097:
054806,000098: 5440 50000 NDX A # GET THE TIME INDIRECTLY
054807,000099: 5441 30001 CA 1
054808,000100:
054809,000101: 5442 22006 LXCH BB # RESTORE THE BB AND GOLOC
054810,000102: 5443 22706 LXCH GOLOC +1
054811,000103:
054812,000104: 5444 13601 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
054813,000105:
054814,000106: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
054815,000107:
054816,000108: 01,3601 BANK 01
054817,000109: 01,2000 SETLOC RESTART
054818,000110: 01,2000 BANK
054819,000111:
054820,000112: 01,3601 COUNT* $$/RSROU
054821,000113: 01,3601 40000 FINDTIME COM # MAKE NEGITIVE SINCE IT WILL BE SUBTRACTD
054822,000114: 01,3602 54001 TS L # AND SAVE
054823,000115: 01,3603 50155 NDX TEMP2G
054824,000116: 01,3604 41053 CS TBASE1
054825,000117: 01,3605 00006 EXTEND
054826,000118: 01,3606 60025 SU TIME1
054827,000119: 01,3607 10000 CCS A
054828,000120: 01,3610 40000 COM
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Page 1305
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054830,000122: 01,3611 67731 AD OCT37776
054831,000123: 01,3612 64753 AD ONE
054832,000124: 01,3613 60001 AD L
054833,000125: 01,3614 10000 CCS A
054834,000126: 01,3615 34755 CA ZERO
054835,000127: 01,3616 13620 TCF +2
054836,000128: 01,3617 13620 TCF +1
054837,000129: 01,3620 64753 IMEDIATE AD ONE
054838,000130: 01,3621 00704 TC GOLOC -1
054839,000131: 01,3622 33565 ITSLIKEB CA RTRNCADR # TYPE B, SO STORE RETURN IN
054840,000132: 01,3623 54157 TS TEMPSWCH # TEMPSWCH IN CASE OF AN EVEN PHASE
054841,000133:
054842,000134: 01,3624 33771 CA PRT2CADR # SET UP EXIT TO GET TABLE PART OF THIS
054843,000135: 01,3625 54707 TS GOLOC +2 # VARIABLE TYPE OF PHASE
054844,000136:
054845,000137: 01,3626 30154 CA TEMPPHS # MAKE THE PHASE LOOK RIGHT FOR THE TABLE
054846,000138: 01,3627 76074 MASK OCT177 # PART OF THIS VARIABLE PHASE
054847,000139: 01,3630 54154 TS TEMPPHS
054848,000140:
054849,000141: 01,3631 00006 EXTEND
054850,000142: 01,3632 50155 NDX TEMP2G # OBTAIN THE JOB:S 2CADR
054851,000143: 01,3633 31437 DCA PHSNAME1
054852,000144: 01,3634 52706 DXCH GOLOC
054853,000145:
054854,000146: 01,3635 50155 ITSAJOB NDX TEMP2G # NOW ADD THE PRIORITY AND LET:S GO
054855,000147: 01,3636 31054 CA PHSPRDT1
054856,000148: 01,3637 54704 CHKNOVAC TS GOLOC -1 # SAVE PRIO UNTIL WE SEE IF ITS
054857,000149: 01,3640 00006 EXTEND # A FINDVAC OR A NOVAC
054858,000150: 01,3641 63645 BZMF ITSNOVAC
054859,000151:
054860,000152: 01,3642 33773 CAF FVACCADR # POSITIVE, SET UP FINDVAC CALL.
054861,000153: 01,3643 56704 XCH GOLOC -1 # PICK UP PRIO,
054862,000154: 01,3644 00704 TC GOLOC -1 # AND GO
054863,000155:
054864,000156: 01,3645 33775 ITSNOVAC CAF NOVACADR # NEGATIVE,
054865,000157: 01,3646 56704 XCH GOLOC -1 # SET UP NOVAC CALL,
054866,000158: 01,3647 40000 COM # CORRECT PRIO,
054867,000159: 01,3650 00704 TC GOLOC -1 # AND GO
054868,000160:
054869,000161: 01,3651 54020 ITSATBL TS CYR # FIND OUT IF THE PHASE IS ODD OR EVEN
054870,000162: 01,3652 10020 CCS CYR
054871,000163: 01,3653 13654 TCF +1 # IT:S EVEN
054872,000164: 01,3654 13752 TCF ITSEVEN
054873,000165:
054874,000166: 01,3655 33565 CA RTRNCADR # IN CASE THIS IS THE SECOND PART OF A
054875,000167: 01,3656 54707 TS GOLOC +2 # TYPE B RESTART, WE NEED PROPER EXIT
054876,000168:
054877,000169: 01,3657 30154 CA TEMPPHS # SET UP POINTER FOR FINDING OUR PLACE IN
054878,000170: 01,3660 54021 TS SR # THE RESTART TABLES
054879,000171: 01,3661 60021 AD SR
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Page 1306
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054881,000173: 01,3662 50155 NDX TEMP2G
054882,000174: 01,3663 62003 AD SIZETAB +1
054883,000175: 01,3664 54156 TS POINTER
054884,000176:
054885,000177: 01,3665 00006 CONTBL2 EXTEND # FIND OUT WHAT:S IN THE TABLE
054886,000178: 01,3666 50156 NDX POINTER
054887,000179: 01,3667 32002 DCA CADRTAB # GET THE 2CADR
054888,000180:
054889,000181: 01,3670 22706 LXCH GOLOC +1 # STORE THE BB INFORMATION
054890,000182:
054891,000183: 01,3671 10000 CCS A # IS IT A JOB OR IS IT TIMED
054892,000184: 01,3672 24000 INCR A # POSITIVE, MUST BE A JOB
054893,000185: 01,3673 13746 TCF ITSAJOB2
054894,000186:
054895,000187: 01,3674 24000 INCR A # MUST BE EITHER A WAITLIST OR LONGCALL
054896,000188: 01,3675 54705 TS GOLOC # LET-S STORE THE CORRECT CADR
054897,000189:
054898,000190: 01,3676 33774 CA WTLTCADR # SET UP OUR EXIT TO WAITLIST
054899,000191: 01,3677 54704 TS GOLOC -1
054900,000192:
054901,000193: 01,3700 30706 CA GOLOC +1 # NOW FIND OUT IF IT IS A WAITLIST CALL
054902,000194: 01,3701 74742 MASK BIT10 # THIS SHOULD BE ONE IF WE HAVE -BB
054903,000195: 01,3702 10000 CCS A # FOR THAT MATTER SO SHOULD BE BITS 9,8,7,
054904,000196: # 6,5, AND LAST BUT NOT LEAST (PERHAPS NOT
054905,000197: # IN IMPORTANCE ANYWAY. BIT 4
054906,000198: 01,3703 13741 TCF ITSWTLST # IT IS A WAITLIST CALL
054907,000199:
054908,000200: 01,3704 50156 NDX POINTER # OBTAIN THE ORIGINAL DELTA T
054909,000201: 01,3705 32000 CA PRDTTAB # ADDRESS FOR THIS LONGCALL
054910,000202:
054911,000203: 01,3706 15445 TCF ITSLGCL1 # NOW GO GET THE DELTA TIME
054912,000204:
054913,000205: # ***** THIS MUST BE IN FIXED FIXED *****
054914,000206:
054915,000207: 5445 BLOCK 02
054916,000208: 4000 SETLOC FFTAG2
054917,000209: 4000 BANK
054918,000210:
054919,000211: 5445 COUNT* $$/RSROU
054920,000212: 5445 22706 ITSLGCL1 LXCH GOLOC +1 # OBTAIN THE CORRECT E BANK
054921,000213: 5446 22006 LXCH BB
054922,000214: 5447 22706 LXCH GOLOC +1 # AND PRESERVE OUR E AND F BANKS
054923,000215:
054924,000216: 5450 00006 EXTEND # GET THE DELTA TIME
054925,000217: 5451 50000 NDX A
054926,000218: 5452 30001 DCA 0
054927,000219:
054928,000220: 5453 22706 LXCH GOLOC +1 # RESTORE OUR E AND F BANK
054929,000221: 5454 22006 LXCH BB # RESTORE THE TASKS E AND F BANKS
054930,000222: 5455 22706 LXCH GOLOC +1 # AND PRESERVE OUR L
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Page 1307
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054932,000224: 5456 13707 TCF ITSLGCL2 # NOW LET:S PROCESS THIS LONGCALL
054933,000225:
054934,000226: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
054935,000227:
054936,000228: 01,3707 BANK 01
054937,000229: 01,2000 SETLOC RESTART
054938,000230: 01,2000 BANK
054939,000231:
054940,000232: 01,3707 COUNT* $$/RSROU
054941,000233: 01,3707 53154 ITSLGCL2 DXCH LONGTIME
054942,000234:
054943,000235: 01,3710 00006 EXTEND # CALCULATE TIME LEFT
054944,000236: 01,3711 40025 DCS TIME2
054945,000237: 01,3712 21154 DAS LONGTIME
054946,000238: 01,3713 00006 EXTEND
054947,000239: 01,3714 31152 DCA LONGBASE
054948,000240: 01,3715 21154 DAS LONGTIME
054949,000241:
054950,000242: 01,3716 11153 CCS LONGTIME # FIND OUT HOW THIS SHOULD BE RESTARTED
054951,000243: 01,3717 13727 TCF LONGCLCL
054952,000244: 01,3720 13722 TCF +2
054953,000245: 01,3721 13615 TCF IMEDIATE -3
054954,000246: 01,3722 11154 CCS LONGTIME +1
054955,000247: 01,3723 13727 TCF LONGCLCL
054956,000248: 01,3724 13725 NOOP # CAN:T GET HERE *********
054957,000249: 01,3725 13615 TCF IMEDIATE -3
054958,000250: 01,3726 13620 TCF IMEDIATE
054959,000251:
054960,000252: 01,3727 33772 LONGCLCL CA LGCLCADR # WE WILL GO TO LONGCALL
054961,000253: 01,3730 54704 TS GOLOC -1
054962,000254:
054963,000255: 01,3731 00006 EXTEND # PREPARE OUR ENTRY TO LONGCALL
054964,000256: 01,3732 31154 DCA LONGTIME
054965,000257: 01,3733 00704 TC GOLOC -1
054966,000258:
054967,000259: 01,3734 33774 ITSLNGCL CA WTLTCADR # ASSUME IT WILL GO TO WAITLIST
054968,000260: 01,3735 54704 TS GOLOC -1
054969,000261:
054970,000262: 01,3736 50155 NDX TEMP2G
054971,000263: 01,3737 41054 CS PHSPRDT1 # GET THE DELTA T ADDRESS
054972,000264:
054973,000265: 01,3740 15445 TCF ITSLGCL1 # NOW GET THE DELTA TIME
054974,000266:
054975,000267: 01,3741 40706 ITSWTLST CS GOLOC +1 # CORRECT THE BBCON INFORMATION
054976,000268: 01,3742 54706 TS GOLOC +1
054977,000269:
054978,000270: 01,3743 50156 NDX POINTER # GET THE DT AND FIND OUT IF IT WAS STORED
054979,000271: 01,3744 32000 CA PRDTTAB # DIRECTLY OR INDIRECTLY
054980,000272:
054981,000273: 01,3745 13574 TCF TIMETEST # FIND OUT HOW THE TIME IS STORED
054982,000274:
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Page 1308
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054984,000276: 01,3746 56705 ITSAJOB2 XCH GOLOC # STORE THE CADR
054985,000277:
054986,000278: 01,3747 50156 NDX POINTER # ADD THE PRIORITY AND LET:S GO
054987,000279: 01,3750 32000 CA PRDTTAB
054988,000280:
054989,000281: 01,3751 13637 TCF CHKNOVAC
054990,000282:
054991,000283: 01,3752 30157 ITSEVEN CA TEMPSWCH # SET UP FOR EITHER THE SECOND PART OF THE
054992,000284: 01,3753 54707 TS GOLOC +2 # TABLE, OR A RETURN FOR THE NEXT GROUP
054993,000285:
054994,000286: 01,3754 50155 NDX TEMP2G # SET UP POINTER FOR OUR LOCATION WITHIN
054995,000287: 01,3755 32002 CA SIZETAB # THE TABLE
054996,000288: 01,3756 60154 AD TEMPPHS # THIS MAY LOOK BAD BUT LET:S SEE YOU DO
054997,000289: 01,3757 60154 AD TEMPPHS # BETTER IN TIME OR NUMBERR OF LOCATIONS
054998,000290: 01,3760 60154 AD TEMPPHS
054999,000291: 01,3761 54156 TS POINTER
055000,000292:
055001,000293: 01,3762 13665 TCF CONTBL2 # NOW PROCESS WHAT IS IN THE TABLE
055002,000294:
055003,000295: 01,3763 36245 PHSPART2 CA THREE # SET THE POINTER FOR THE SECOND HALF OF
055004,000296: 01,3764 26156 ADS POINTER # THE TABLE
055005,000297:
055006,000298: 01,3765 33565 CA RTRNCADR # THIS WILL BE OUR LAST TIME THROUGH THE
055007,000299: 01,3766 54707 TS GOLOC +2 # EVEN TABLE, SO AFTER IT GET THE NEXT
055008,000300: # GROUP
055009,000301: 01,3767 13665 TCF CONTBL2 # SO LET:S GET THE SECOND ENTRY IN THE TBL
055010,000302:
055011,000303: 01,3770 0154 TEMPPHS EQUALS MPAC
055012,000304: 01,3770 0155 TEMP2G EQUALS MPAC +1
055013,000305: 01,3770 0156 POINTER EQUALS MPAC +2
055014,000306: 01,3770 0157 TEMPSWCH EQUALS MPAC +3
055015,000307: 01,3770 0705 GOLOC EQUALS VAC5 +20D
055016,000308: 01,3770 7746 MINUS2 EQUALS NEG2
055017,000309: 01,3770 6074 OCT177 EQUALS LOW7
055018,000310:
055019,000311: 01,3770 03763 PHS2CADR GENADR PHSPART2
055020,000312: 01,3771 03541 PRT2CADR GENADR GETPART2
055021,000313: 01,3772 05277 LGCLCADR GENADR LONGCALL
055022,000314: 01,3773 05105 FVACCADR GENADR FINDVAC
055023,000315: 01,3774 05203 WTLTCADR GENADR WAITLIST
055024,000316: 01,3775 05072 NOVACADR GENADR NOVAC
055025,000317:
055026,000318:
End of include-file RESTARTS_ROUTINE.agc. Parent file is MAIN.agc