Source Code
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These source-code files were derived from scans of the
Colossus 237 (Apollo 8 Command Module) program listing from the private collection of original
AGC developer Fred Martin. Scanning was by Ron Burkey. Pre-existing Colossus 249
(Apollo 9 CM) source files were used as a template, and changes between Colossus 249
and Colossus 237 were manually transcribed by a team of volunteers. Note
that the page images
presented online are of reduced quality, and that additional images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 237 OF AGC PROGRAM COLOSSUS BY NASA 2021111-031 1:17 AUG. 24, 1968Note that the date is the date of the printout, not the date of the program revision. |
058567,000002: ## Copyright: Public domain.
058568,000003: ## Filename: RESTARTS_ROUTINE.agc
058569,000004: ## Purpose: Part of the source code for Colossus build 237.
058570,000005: ## This is for the Command Module's (CM) Apollo Guidance
058571,000006: ## Computer (AGC), for Apollo 8.
058572,000007: ## Assembler: yaYUL
058573,000008: ## Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
058574,000009: ## Website: www.ibiblio.org/apollo/index.html
058575,000010: ## Page Scans: www.ibiblio.org/apollo/ScansForConversion/Colossus237/
058576,000011: ## Mod history: 2011-04-17 JL Adapted from corresponding Colossus 249 file.
058577,000012: ## 2017-01-01 RSB Proofed comment text using octopus/ProoferComments,
058578,000013: ## and fixed errors found.
058579,000014: ## 2017-03-14 RSB Comment-text fixes noted in proofing Luminary 116.
058580,000015:
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Page 1378 |
058582,000017: 01,3520 BANK 01
058583,000018: 01,2000 SETLOC RESTART
058584,000019: 01,2000 BANK
058585,000020:
058586,000021: 01,3520 E3,1436 EBANK= PHSNAME1 # GOPROG MUST SWITCH TO THIS EBANK
058587,000022:
058588,000023: 01,3520 COUNT 01/RSROU
058589,000024:
058590,000025: 01,3520 30161 RESTARTS CA MPAC +5 # GET GROUP NUMBER -1
058591,000026: 01,3521 60000 DOUBLE # SAVE FOR INDEXING
058592,000027: 01,3522 54155 TS TEMP2G
058593,000028:
058594,000029: 01,3523 33762 CA PHS2CADR # SET UP EXIT IN CASE IT IS AN EVEN
058595,000030: 01,3524 54157 TS TEMPSWCH # TABLE PHASE
058596,000031:
058597,000032: 01,3525 33557 CA RTRNCADR # TO SAVE TIME ASSUME IT WILL GET NEXT
058598,000033: 01,3526 54707 TS GOLOC +2 # GROUP AFTER THIS
058599,000034:
058600,000035: 01,3527 30154 CA TEMPPHS
058601,000036: 01,3530 74744 MASK OCT1400
058602,000037: 01,3531 10000 CCS A # IS IT A VARIABLE OR TABLE RESTART
058603,000038: 01,3532 13543 TCF ITSAVAR # IT:S A VARIABLE RESTART
058604,000039:
058605,000040: 01,3533 10154 GETPART2 CCS TEMPPHS # IS IT AN X.1 RESTART
058606,000041: 01,3534 10000 CCS A
058607,000042: 01,3535 13643 TCF ITSATBL # NO, ITS A TABLE RESTART
058608,000043:
058609,000044: 01,3536 34761 CA PRIO14 # IT IS AN X.1 RESTART, THEREFORE START
058610,000045: 01,3537 05042 TC FINDVAC # THE DISPLAY RESTART JOB
058611,000046: 01,3540 E3,1400 EBANK= LST1
058612,000047: 01,3540 03165 20103 2CADR INITDSP
058613,000048:
058614,000049: 01,3542 03557 TC RTRNCADR # FINISHED WITH THIS GROUP, GET NEXT ONE
058615,000050:
058616,000051: 01,3543 74744 ITSAVAR MASK OCT1400 # IS IT TYPE B ?
058617,000052: 01,3544 10000 CCS A
058618,000053: 01,3545 13614 TCF ITSLIKEB # YES,IT IS TYPE B
058619,000054:
058620,000055: 01,3546 00006 EXTEND # STORE THE JOB (OR TASK) 2CADR FOR EXIT
058621,000056: 01,3547 50155 NDX TEMP2G
058622,000057: 01,3550 31437 DCA PHSNAME1
058623,000058: 01,3551 52706 DXCH GOLOC
058624,000059:
058625,000060: 01,3552 30154 CA TEMPPHS # SEE IF THIS IS A JOB, TASK, OR A LONGCAL
058626,000061: 01,3553 74716 MASK OCT7
058627,000062: 01,3554 67715 AD MINUS2
058628,000063: 01,3555 10000 CCS A
058629,000064: 01,3556 13726 TCF ITSLNGCL # ITS A LONGCALL
058630,000065:
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Page 1379 |
058632,000067: 01,3557 04570 RTRNCADR TC SWRETURN # CANT GET HERE
058633,000068: 01,3560 13562 TCF ITSAWAIT
058634,000069:
058635,000070: 01,3561 13627 TCF ITSAJOB # ITS A JOB
058636,000071:
058637,000072: 01,3562 33766 ITSAWAIT CA WTLTCADR # SET UP WAITLIST CALL
058638,000073: 01,3563 54704 TS GOLOC -1
058639,000074:
058640,000075: 01,3564 50155 NDX TEMP2G # DIRECTLY STORED
058641,000076: 01,3565 31054 CA PHSPRDT1
058642,000077: 01,3566 10000 TIMETEST CCS A # IS IT AN IMMEDIATE RESTART
058643,000078: 01,3567 24000 INCR A # NO,
058644,000079: 01,3570 13573 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
058645,000080:
058646,000081: 01,3571 15367 TCF ITSINDIR # STORED INDIRECTLY
058647,000082:
058648,000083: 01,3572 13612 TCF IMEDIATE # IT WANTS AN IMMEDIATE RESTART
058649,000084:
058650,000085: # ***** THIS MUST BE IN FIXED FIXED *****
058651,000086:
058652,000087: 5367 BLOCK 02
058653,000088: 4000 SETLOC FFTAG2
058654,000089: 4000 BANK
058655,000090:
058656,000091: 5367 COUNT 02/RSROU
058657,000092:
058658,000093: 5367 22706 ITSINDIR LXCH GOLOC +1 # GET THE CORRECT E BANK IN CASE THIS IS
058659,000094: 5370 22006 LXCH BB # SWITCHED ERRASIBLE
058660,000095:
058661,000096: 5371 50000 NDX A # GET THE TIME INDIRECTLY
058662,000097: 5372 30001 CA 1
058663,000098:
058664,000099: 5373 22006 LXCH BB # RESTORE THE BB AND GOLOC
058665,000100: 5374 22706 LXCH GOLOC +1
058666,000101:
058667,000102: 5375 13573 TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
058668,000103:
058669,000104: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
058670,000105:
058671,000106: 01,3573 BANK 01
058672,000107: 01,2000 SETLOC RESTART
058673,000108: 01,2000 BANK
058674,000109:
058675,000110: 01,3573 COUNT 01/RSROU
058676,000111:
058677,000112: 01,3573 40000 FINDTIME COM # MAKE NEGITIVE SINCE IT WILL BE SUBTRACTD
058678,000113: 01,3574 54001 TS L # AND SAVE
058679,000114: 01,3575 50155 NDX TEMP2G
058680,000115: 01,3576 41053 CS TBASE1
058681,000116: 01,3577 00006 EXTEND
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Page 1380 |
058683,000118: 01,3600 60025 SU TIME1
058684,000119: 01,3601 10000 CCS A
058685,000120: 01,3602 40000 COM
058686,000121: 01,3603 67700 AD OCT37776
058687,000122: 01,3604 64712 AD ONE
058688,000123: 01,3605 60001 AD L
058689,000124: 01,3606 10000 CCS A
058690,000125: 01,3607 34714 CA ZERO
058691,000126: 01,3610 13612 TCF +2
058692,000127: 01,3611 13612 TCF +1
058693,000128: 01,3612 64712 IMEDIATE AD ONE
058694,000129: 01,3613 00704 TC GOLOC -1
058695,000130: 01,3614 33557 ITSLIKEB CA RTRNCADR # TYPE B, SO STORE RETURN IN
058696,000131: 01,3615 54157 TS TEMPSWCH # TEMPSWCH IN CASE OF AN EVEN PHASE
058697,000132:
058698,000133: 01,3616 33763 CA PRT2CADR # SET UP EXIT TO GET TABLE PART OF THIS
058699,000134: 01,3617 54707 TS GOLOC +2 # VARIABLE TYPE OF PHASE
058700,000135:
058701,000136: 01,3620 30154 CA TEMPPHS # MAKE THE PHASE LOOK RIGHT FOR THE TABLE
058702,000137: 01,3621 76043 MASK OCT177 # PART OF THIS VARIABLE PHASE
058703,000138: 01,3622 54154 TS TEMPPHS
058704,000139:
058705,000140: 01,3623 00006 EXTEND
058706,000141: 01,3624 50155 NDX TEMP2G # OBTAIN THE JOB:S 2CADR
058707,000142: 01,3625 31437 DCA PHSNAME1
058708,000143: 01,3626 52706 DXCH GOLOC
058709,000144:
058710,000145: 01,3627 50155 ITSAJOB NDX TEMP2G # NOW ADD THE PRIORITY AND LET:S GO
058711,000146: 01,3630 31054 CA PHSPRDT1
058712,000147: 01,3631 54704 CHKNOVAC TS GOLOC -1 # SAVE PRIO UNTIL WE SEE IF ITS
058713,000148: 01,3632 00006 EXTEND # A FINDVAC OR A NOVAC
058714,000149: 01,3633 63637 BZMF ITSNOVAC
058715,000150:
058716,000151: 01,3634 33765 CAF FVACCADR # POSITIVE, SET UP FINDVAC CALL.
058717,000152: 01,3635 56704 XCH GOLOC -1 # PICK UP PRIO,
058718,000153: 01,3636 00704 TC GOLOC -1 # AND GO
058719,000154:
058720,000155: 01,3637 33767 ITSNOVAC CAF NOVACADR # NEGATIVE,
058721,000156: 01,3640 56704 XCH GOLOC -1 # SET UP NOVAC CALL,
058722,000157: 01,3641 40000 COM # CORRECT PRIO,
058723,000158: 01,3642 00704 TC GOLOC -1 # AND GO
058724,000159:
058725,000160: 01,3643 54020 ITSATBL TS CYR # FIND OUT IF THE PHASE IS ODD OR EVEN
058726,000161: 01,3644 10020 CCS CYR
058727,000162: 01,3645 13646 TCF +1 # IT:S EVEN
058728,000163: 01,3646 13744 TCF ITSEVEN
058729,000164:
058730,000165: 01,3647 33557 CA RTRNCADR # IN CASE THIS IS THE SECOND PART OF A
058731,000166: 01,3650 54707 TS GOLOC +2 # TYPE B RESTART, WE NEED PROPER EXIT
058732,000167:
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Page 1381 |
058734,000169: 01,3651 30154 CA TEMPPHS # SET UP POINTER FOR FINDING OUR PLACE IN
058735,000170: 01,3652 54021 TS SR # THE RESTART TABLES
058736,000171: 01,3653 60021 AD SR
058737,000172: 01,3654 50155 NDX TEMP2G
058738,000173: 01,3655 62001 AD SIZETAB +1
058739,000174: 01,3656 54156 TS POINTER
058740,000175:
058741,000176: 01,3657 00006 CONTBL2 EXTEND # FIND OUT WHAT:S IN THE TABLE
058742,000177: 01,3660 50156 NDX POINTER
058743,000178: 01,3661 32002 DCA CADRTAB # GET THE 2CADR
058744,000179:
058745,000180: 01,3662 22706 LXCH GOLOC +1 # STORE THE BB INFORMATION
058746,000181:
058747,000182: 01,3663 10000 CCS A # IS IT A JOB OR IS IT TIMED
058748,000183: 01,3664 24000 INCR A # POSITIVE, MUST BE A JOB
058749,000184: 01,3665 13740 TCF ITSAJOB2
058750,000185:
058751,000186: 01,3666 24000 INCR A # MUST BE EITHER A WAITLIST OR LONGCALL
058752,000187: 01,3667 54705 TS GOLOC # LET-S STORE THE CORRECT CADR
058753,000188:
058754,000189: 01,3670 33766 CA WTLTCADR # SET UP OUR EXIT TO WAITLIST
058755,000190: 01,3671 54704 TS GOLOC -1
058756,000191:
058757,000192: 01,3672 30706 CA GOLOC +1 # NOW FIND OUT IF IT IS A WAITLIST CALL
058758,000193: 01,3673 74701 MASK BIT10 # THIS SHOULD BE ONE IF WE HAVE -BB
058759,000194: 01,3674 10000 CCS A # FOR THAT MATTER SO SHOULD BE BITS 9,8,7,
058760,000195: # 6,5, AND LAST BUT NOT LEAST (PERHAPS NOT
058761,000196: # IN IMPORTANCE ANYWAY. BIT 4
058762,000197: 01,3675 13733 TCF ITSWTLST # IT IS A WAITLIST CALL
058763,000198:
058764,000199: 01,3676 50156 NDX POINTER # OBTAIN THE ORIGINAL DELTA T
058765,000200: 01,3677 32000 CA PRDTTAB # ADDRESS FOR THIS LONGCALL
058766,000201:
058767,000202: 01,3700 15376 TCF ITSLGCL1 # NOW GO GET THE DELTA TIME
058768,000203:
058769,000204: # ***** THIS MUST BE IN FIXED FIXED *****
058770,000205:
058771,000206: 5376 BLOCK 02
058772,000207: 4000 SETLOC FFTAG2
058773,000208: 4000 BANK
058774,000209:
058775,000210: 5376 COUNT 02/RSROU
058776,000211:
058777,000212: 5376 22706 ITSLGCL1 LXCH GOLOC +1 # OBTAIN THE CORRECT E BANK
058778,000213: 5377 22006 LXCH BB
058779,000214: 5400 22706 LXCH GOLOC +1 # AND PRESERVE OUR E AND F BANKS
058780,000215:
058781,000216: 5401 00006 EXTEND # GET THE DELTA TIME
058782,000217: 5402 50000 NDX A
058783,000218: 5403 30001 DCA 0
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Page 1382 |
058785,000220: 5404 22706 LXCH GOLOC +1 # RESTORE OUR E AND F BANK
058786,000221: 5405 22006 LXCH BB # RESTORE THE TASKS E AND F BANKS
058787,000222: 5406 22706 LXCH GOLOC +1 # AND PRESERVE OUR L
058788,000223:
058789,000224: 5407 13701 TCF ITSLGCL2 # NOW LET:S PROCESS THIS LONGCALL
058790,000225:
058791,000226: # ***** YOU MAY RETURN TO SWITCHED FIXED *****
058792,000227:
058793,000228: 01,3701 BANK 01
058794,000229: 01,2000 SETLOC RESTART
058795,000230: 01,2000 BANK
058796,000231:
058797,000232: 01,3701 COUNT 01/RSROU
058798,000233:
058799,000234: 01,3701 53140 ITSLGCL2 DXCH LONGTIME
058800,000235:
058801,000236: 01,3702 00006 EXTEND # CALCULATE TIME LEFT
058802,000237: 01,3703 40025 DCS TIME2
058803,000238: 01,3704 21140 DAS LONGTIME
058804,000239: 01,3705 00006 EXTEND
058805,000240: 01,3706 31136 DCA LONGBASE
058806,000241: 01,3707 21140 DAS LONGTIME
058807,000242:
058808,000243: 01,3710 11137 CCS LONGTIME # FIND OUT HOW THIS SHOULD BE RESTARTED
058809,000244: 01,3711 13721 TCF LONGCLCL
058810,000245: 01,3712 13714 TCF +2
058811,000246: 01,3713 13607 TCF IMEDIATE -3
058812,000247: 01,3714 11140 CCS LONGTIME +1
058813,000248: 01,3715 13721 TCF LONGCLCL
058814,000249: 01,3716 13717 NOOP # CAN:T GET HERE *********
058815,000250: 01,3717 13607 TCF IMEDIATE -3
058816,000251: 01,3720 13612 TCF IMEDIATE
058817,000252:
058818,000253: 01,3721 33764 LONGCLCL CA LGCLCADR # WE WILL GO TO LONGCALL
058819,000254: 01,3722 54704 TS GOLOC -1
058820,000255:
058821,000256: 01,3723 00006 EXTEND # PREPARE OUR ENTRY TO LONGCALL
058822,000257: 01,3724 31140 DCA LONGTIME
058823,000258: 01,3725 00704 TC GOLOC -1
058824,000259:
058825,000260: 01,3726 33766 ITSLNGCL CA WTLTCADR # ASSUME IT WILL GO TO WAITLIST
058826,000261: 01,3727 54704 TS GOLOC -1
058827,000262:
058828,000263: 01,3730 50155 NDX TEMP2G
058829,000264: 01,3731 41054 CS PHSPRDT1 # GET THE DELTA T ADDRESS
058830,000265:
058831,000266: 01,3732 15376 TCF ITSLGCL1 # NOW GET THE DELTA TIME
058832,000267:
058833,000268: 01,3733 40706 ITSWTLST CS GOLOC +1 # CORRECT THE BBCON INFORMATION
058834,000269: 01,3734 54706 TS GOLOC +1
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Page 1383 |
058836,000271: 01,3735 50156 NDX POINTER # GET THE DT AND FIND OUT IF IT WAS STORED
058837,000272: 01,3736 32000 CA PRDTTAB # DIRECTLY OR INDIRECTLY
058838,000273:
058839,000274: 01,3737 13566 TCF TIMETEST # FIND OUT HOW THE TIME IS STORED
058840,000275:
058841,000276: 01,3740 56705 ITSAJOB2 XCH GOLOC # STORE THE CADR
058842,000277:
058843,000278: 01,3741 50156 NDX POINTER # ADD THE PRIORITY AND LET:S GO
058844,000279: 01,3742 32000 CA PRDTTAB
058845,000280:
058846,000281: 01,3743 13631 TCF CHKNOVAC
058847,000282:
058848,000283: 01,3744 30157 ITSEVEN CA TEMPSWCH # SET UP FOR EITHER THE SECOND PART OF THE
058849,000284: 01,3745 54707 TS GOLOC +2 # TABLE, OR A RETURN FOR THE NEXT GROUP
058850,000285:
058851,000286: 01,3746 50155 NDX TEMP2G # SET UP POINTER FOR OUR LOCATION WITHIN
058852,000287: 01,3747 32000 CA SIZETAB # THE TABLE
058853,000288: 01,3750 60154 AD TEMPPHS # THIS MAY LOOK BAD BUT LET:S SEE YOU DO
058854,000289: 01,3751 60154 AD TEMPPHS # BETTER IN TIME OR NUMBERR OF LOCATIONS
058855,000290: 01,3752 60154 AD TEMPPHS
058856,000291: 01,3753 54156 TS POINTER
058857,000292:
058858,000293: 01,3754 13657 TCF CONTBL2 # NOW PROCESS WHAT IS IN THE TABLE
058859,000294:
058860,000295: 01,3755 36214 PHSPART2 CA THREE # SET THE POINTER FOR THE SECOND HALF OF
058861,000296: 01,3756 26156 ADS POINTER # THE TABLE
058862,000297:
058863,000298: 01,3757 33557 CA RTRNCADR # THIS WILL BE OUR LAST TIME THROUGH THE
058864,000299: 01,3760 54707 TS GOLOC +2 # EVEN TABLE , SO AFTER IT GET THE NEXT
058865,000300: # GROUP
058866,000301: 01,3761 13657 TCF CONTBL2 # SO LET:S GET THE SECOND ENTRY IN THE TBL
058867,000302:
058868,000303: 01,3762 0154 TEMPPHS EQUALS MPAC
058869,000304: 01,3762 0155 TEMP2G EQUALS MPAC +1
058870,000305: 01,3762 0156 POINTER EQUALS MPAC +2
058871,000306: 01,3762 0157 TEMPSWCH EQUALS MPAC +3
058872,000307: 01,3762 0705 GOLOC EQUALS VAC5 +20D
058873,000308: 01,3762 7715 MINUS2 EQUALS NEG2
058874,000309: 01,3762 6043 OCT177 EQUALS LOW7
058875,000310:
058876,000311:
058877,000312: 01,3762 03755 PHS2CADR GENADR PHSPART2
058878,000313: 01,3763 03533 PRT2CADR GENADR GETPART2
058879,000314: 01,3764 05231 LGCLCADR GENADR LONGCALL
058880,000315: 01,3765 05042 FVACCADR GENADR FINDVAC
058881,000316: 01,3766 05140 WTLTCADR GENADR WAITLIST
058882,000317: 01,3767 05027 NOVACADR GENADR NOVAC
End of include-file RESTARTS_ROUTINE.agc. Parent file is MAIN.agc