GAP: ASSEMBLE REVISION 131 OF AGC PROGRAM LUMINARY BY NASA 2021112-091 17:53 DEC. 19, 1969Note that the date is the date the printout was made, not the date on which the program revision was released, although these happen to be very close together.
Source Code
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This source code is very close to the Apollo Guidance Computer software for the
Apollo 13 Lunar module. This revision of the Luminary 131 program is from December
of 1969, whereas there was a later revision in January of 1970, and still another
revision in February, which is the code that flew on the mission.
As far as this transcription is concerned, it was originally from a copy made in 1991 of
a printout from the collection of AGC developer Don Eyles for collector David Craig.
It was subsequently scanned by Gary Neff, reprocessed for online
presentation at the now-discontinued History of Recent Science and Technology (HRST) website
of MIT's Dibner Institute (the full-quality scans being discarded in the process),
and finally transcribed by Ron Burkey for the Virtual AGC Project. Although a
high-quality replacement scan for a completely illegible page was later provided by Gary
Neff, the reduced legibility of the reprocessed HRST posting nevertheless caused many
errors to be introduced into the transcription. Accordingly, a second scan of the same physical
printout was made in 2017 for the Virtual AGC Project's collection at the Internet Archive,
and used to correct the transcription errors. All of the scanned materials mentioned,
as well as other Luminary 131 related material, are available online.
Don Eyles apprently made additional hand-written notes in printout between 1991 and 2017,
so the two scans are not identical in that respect. The page-headings in the printout read, in part:GAP: ASSEMBLE REVISION 131 OF AGC PROGRAM LUMINARY BY NASA 2021112-091 17:53 DEC. 19, 1969Note that the date is the date the printout was made, not the date on which the program revision was released, although these happen to be very close together. |
009776,000002: ## Copyright: Public domain.
009777,000003: ## Filename: RESTART_TABLES.agc
009778,000004: ## Purpose: A section of Luminary 1C, revision 131.
009779,000005: ## It is part of the source code for the Lunar Module's (LM)
009780,000006: ## Apollo Guidance Computer (AGC) for Apollo 13.
009781,000007: ## This file is intended to be a faithful transcription, except
009782,000008: ## that the code format has been changed to conform to the
009783,000009: ## requirements of the yaYUL assembler rather than the
009784,000010: ## original YUL assembler.
009785,000011: ## Reference: pp. 239-244
009786,000012: ## Contact: Ron Burkey <info@sandroid.org>.
009787,000013: ## Website: www.ibiblio.org/apollo/index.html
009788,000014: ## Mod history: 05/06/03 RSB. Began transcribing.
009789,000015: ## 05/14/05 RSB Corrected website references above.
009790,000016: ## 2017-01-06 RSB Page numbers now agree with those on the
009791,000017: ## original harcopy, as opposed to the PDF page
009792,000018: ## numbers in 1701.pdf.
009793,000019: ## 2017-02-08 RSB Comment-text fixes identified while proofing Artemis 72.
009794,000020: ## 2017-02-20 RSB Proofed comment text using octopus/ProoferComments.
009795,000021: ## 2017-03-01 RSB Restored a period which was present in both Luminary 116
009796,000022: ## and 210, and was therefore presumably missing due to a
009797,000023: ## printer problem.
009798,000024: ## 2017-03-13 RSB GOP00FIX -> GOPOOFIX.
009799,000025:
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Page 239 |
009801,000027: # RESTART TABLES
009802,000028: # ------------------
009803,000029:
009804,000030: # THERE ARE TWO FORMS OF RESTART TABLES FOR EACH GROUP. THEY ARE KNOWN AS THE EVEN RESTART TABLES AND THE ODD
009805,000031: # RESTART TABLES. THE ODD TABLES HAVE ONLY ONE ENTRY OF THREE LOCATIONS WHILE THE EVEN TABLES HAVE TWO ENTRIES
009806,000032: # EACH USING THREE LOCATIONS. THE INFORMATION AS TO WHETHER IT IS A JOB, WAITLIST, OR A LONGCALL IS GIVEN BY THE
009807,000033: # WAY THINGS ARE PUT IN TO THE TABLES.
009808,000034:
009809,000035: # A JOB HAS ITS PRIORITY STORED IN PRDTTAB OF THE CORRECT PHASE SPOT - A POSITIVE PRIORITY INDICATES A
009810,000036: # FINDVAC JOB, A NEGATIVE PRIORITY A NOVAC. THE 2CADR OF THE JOB IS STORED IN THE CADRTAB.
009811,000037: # FOR EXAMPLE,
009812,000038:
009813,000039: # 5.7SPOT OCT 23000
009814,000040: # 2CADR SOMEJOB
009815,000041:
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In the line below, the printout certainly has no period at the end of the line. However, the corresponding lines in Luminary 116 and 210 have such a period and are otherwise identical. Therefore, this is presumably a printer error, and the period has been restored. |
009819,000045: # A RESTART OF GROUP 5 WITH PHASE SEVEN WOULD THEN CAUSE SOMEJOB TO BE RESTARTED AS A FINDVAC WITH PRIORITY 23.
009820,000046:
009821,000047: # 5.5SPOT OCT -23000
009822,000048: # 2CADR ANYJOB
009823,000049:
009824,000050: # HERE A RESTART OF GROUP 5 WITH PHASE 7 WOULD CAUSE ANYJOB TO BE RESTARTED AS A NOVAC WITH PRIORITY 23.
009825,000051: # A LONGCALL HAS ITS GENADR OF ITS 2CADR STORED NEGATIVELY AND ITS BBCON STORED POSITIVELY. IN ITS PRDTTAB IS
009826,000052: # PLACED THE LOCATION OF A DP REGISTER THAT CONTAINS THE DELTA TIME THAT LONGCALL HAD BEEN ORIGINALLY STARTED
009827,000053: # WITH. EXAMPLE,
009828,000054:
009829,000055: # 3.6SPOT GENADR DELTAT
009830,000056: # -GENADR LONGTASK
009831,000057: # BBCON LONGTASK
009832,000058: # OCT 31000
009833,000059: # 2CADR JOBAGAIN
009834,000060:
009835,000061: # THIS WOULD START UP LONGTASK AT THE APPROPRIATE TIME, OR IMMEDIATELY IF THE TIME HAD ALREADY PASSED. IT SHOULD
009836,000062: # BE NOTED THAT IF DELTAT IS IN A SWITCHED E BANK, THIS INFORMATOIN SHOULD BE IN THE BBCON OF THE 2CADR OF THE
009837,000063: # TASK. FROM ABOVE, WE SEE THAT THE SECOND PART O FTHIS PHASE WOULD BE STARTED AS A JOB WITH A PRIORITY OF 31.
009838,000064:
009839,000065: # WAITLIST CALLS ARE IDENTIFIED BY THE FACT THAT THEIR 2CADR IS STORED NEGATIVELY. IF PRDTTAB OF THE PHASE SPOT
009840,000066: # IS POSITIVE, THEN IT CONTAINS THE DELTA TIME, IF PRDTTAB IS NEGATIVE THEN IT IS THE -GENADR OF AN ERASABLE
009841,000067: # LOCATION CONTAINING THE DELTA TIME, THAT IS, THE TIME IS STORED INDIRECTLY. IT SHOULD BE NOTED AS ABOVE, THAT
009842,000068: # IF THE TIME IS STORED INDIRECTLY, THE BBCON MUST CONTAIN THE NECESSARY E BANK INFORMATION IF APPLICABLE. WITH
009843,000069: # WAITLIST WE HAVE ONE FURTHER OPTION, IF -0 IS STORED IN PRDTTAB, IT WILL CAUSE AN IMMEDIATE RESTART OF THE
009844,000070: # TASK. EXAMPLES,
009845,000071:
009846,000072: # OCT 77777 THIS WILL CAUSE AN IMMEDIATE RESTART
009847,000073: # -2CADR ATASK OF THE TASK :ATASK:
009848,000074: #
009849,000075: # DEC 200 IF THE TIME OF THE 2 SECONDS SINCE DUMMY
009850,000076: # -2CADR DUMMY WAS PUT ON WAITLIST IS UP, IT WILL BEGIN
009851,000077: # IN 10 MS, OTHERWISE IT WILL BEGIN WHEN
009852,000078: # IT NORMALLY WOULD HAVE BEGUN.
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009854,000080: # -GENADR DTIME WHERE DTIME CONTAINS THE DELTA TIME
009855,000081: # -2CADR TASKTASK OTHERWISE THIS IS AS ABOVE
009856,000082:
009857,000083: # ***** NOW THE TABLES THEMSELVES *****
009858,000084:
009859,000085: 01,2002 BANK 01
009860,000086: 01,2000 SETLOC RESTART
009861,000087: 01,2000 BANK
009862,000088:
009863,000089: 01,2002 PRDTTAB EQUALS 12000 # USED TO FIND THE PRIORITY OR DELTATIME
009864,000090: 01,2002 CADRTAB EQUALS 12001 # THIS AND THE NEXT RELATIVE LOC CONTAIN
009865,000091: # RESTART 2CADR
009866,000092:
009867,000093: 01,2002 COUNT* $$/RSTAB # TABLES IN BANK 1.
009868,000094: 01,2002 00010 SIZETAB TC 1.2SPOT -12006
009869,000095: 01,2003 00020 TC 1.3SPOT -12004
009870,000096: 01,2004 00010 TC 2.2SPOT -12006
009871,000097: 01,2005 00026 TC 2.3SPOT -12004
009872,000098: 01,2006 00010 TC 3.2SPOT -12006
009873,000099: 01,2007 00056 TC 3.3SPOT -12004
009874,000100: 01,2010 00062 TC 4.2SPOT -12006
009875,000101: 01,2011 00072 TC 4.3SPOT -12004
009876,000102: 01,2012 00145 TC 5.2SPOT -12006
009877,000103: 01,2013 00163 TC 5.3SPOT -12004
009878,000104: 01,2014 00010 TC 6.2SPOT -12006
009879,000105: 01,2015 00174 TC 6.3SPOT -12004
009880,000106: 01,2016 21000 1.2SPOT OCT 21000 # A DUMMY EXAMPLE TO BE REPLACED AS SOON
009881,000107: 01,2017 0074 EBANK= STATE
009882,000108: 01,2017 05155 04060 2CADR ENDOFJOB # AS THERE IS A LEGITIMATE 1.2SPOT
009883,000109:
009884,000110: 01,2021 00144 DEC 100 B-14
009885,000111: 01,2022 0074 EBANK= STATE
009886,000112: 01,2022 05261 04060 2CADR TASKOVER
009887,000113:
009888,000114: # ANY MORE GROUP 1.EVEN RESTART VALUES SHOULD GO HERE
009889,000115:
009890,000116: 01,2024 76300 1.3SPOT -GENADR SAVET-30
009891,000117: 01,2025 E7,1515 EBANK= DVCNTR
009892,000118: 01,2025 75427 03710 -2CADR ULLGTASK
009893,000119:
009894,000120: 01,2027 32000 1.5SPOT OCT 32000
009895,000121: 01,2030 E7,1654 EBANK= HMEAS
009896,000122: 01,2030 03630 66067 2CADR REREPOS
009897,000123:
009898,000124: # ANY MORE GROUP 1.ODD RESTART VALUES SHOULD GO HERE
009899,000125:
009900,000126: 01,2032 01,2016 2.2SPOT EQUALS 1.2SPOT
009901,000127:
009902,000128: # ANY MORE GROUP 2.EVEN RESTART VALUES SHOULD GO HERE
009903,000129:
009904,000130: 01,2032 02627 2.3SPOT GENADR 600SECS
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009906,000132: 01,2033 75175 -GENADR STATEINT
009907,000133: 01,2034 E3,1554 EBANK= RRECTCSM
009908,000134: 01,2034 26063 BBCON STATEINT
009909,000135:
009910,000136: 01,2035 05000 2.5SPOT OCT 05000
009911,000137: 01,2036 E3,1554 EBANK= RRECTCSM
009912,000138: 01,2036 02611 26063 2CADR STATINT1
009913,000139:
009914,000140: 01,2040 02734 2.7SPOT DEC 1500 B-14
009915,000141: 01,2041 E7,1456 EBANK= LOSCOUNT
009916,000142: 01,2041 75533 27710 -2CADR P20LEMC1
009917,000143:
009918,000144: 01,2043 14000 2.11SPOT OCT 14000
009919,000145: 01,2044 E7,1762 EBANK= P21TIME
009920,000146: 01,2044 02414 50067 2CADR P25LEM1
009921,000147:
009922,000148: 01,2046 10000 2.13SPOT OCT 10000
009923,000149: 01,2047 E7,1456 EBANK= LOSCOUNT
009924,000150: 01,2047 02223 54067 2CADR RELINUS
009925,000151:
009926,000152: 01,2051 26000 2.15SPOT OCT 26000
009927,000153: 01,2052 E7,1456 EBANK= LOSCOUNT
009928,000154: 01,2052 02654 50067 2CADR R22RSTRT
009929,000155:
009930,000156: 01,2054 77777 2.17SPOT OCT 77777
009931,000157: 01,2055 E7,1700 EBANK= VGPREV
009932,000158: 01,2055 75436 03710 -2CADR REDO2.17
009933,000159:
009934,000160: 01,2057 00031 2.21SPOT DEC 25 B-14
009935,000161: 01,2060 E7,1515 EBANK= DVCNTR
009936,000162: 01,2060 75771 35710 -2CADR R10,R11
009937,000163:
009938,000164: # ANY MORE GROUP 2.ODD RESTART VALUES SHOULD GO HERE.
009939,000165:
009940,000166: 01,2062 01,2016 3.2SPOT EQUALS 1.2SPOT
009941,000167:
009942,000168: # ANY MORE GROUP 3.EVEN RESTART VALUES SHOULD GO HERE
009943,000169:
009944,000170: 01,2062 76355 3.3SPOT -GENADR ZOOMTIME
009945,000171: 01,2063 E7,1515 EBANK= DVCNTR
009946,000172: 01,2063 74110 05710 -2CADR ZOOM
009947,000173:
009948,000174: 01,2065 20000 3.5SPOT OCT 20000
009949,000175: 01,2066 E7,1453 EBANK= TTOGO
009950,000176: 01,2066 02540 56067 2CADR S40.13
009951,000177:
009952,000178: # ANY MORE GROUP 3.ODD RESTART VALUES SHOULD GO HERE
009953,000179:
009954,000180: 01,2070 04704 4.2SPOT DEC 2500 B-14
009955,000181: 01,2071 E7,1453 EBANK= TTOGO
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009957,000183: 01,2071 75423 03710 -2CADR TIG-5
009958,000184:
009959,000185: 01,2073 77777 OCT 77777
009960,000186: 01,2074 E7,1453 EBANK= TTOGO
009961,000187: 01,2074 75433 03710 -2CADR REDO4.2
009962,000188:
009963,000189: # ANY MORE GROUP 4.EVEN RESTART VALUES SHOULD GO HERE
009964,000190:
009965,000191: 01,2076 25000 4.3SPOT OCT 25000
009966,000192: 01,2077 E7,1515 EBANK= DVCNTR
009967,000193: 01,2077 03533 64067 2CADR GOABORT
009968,000194:
009969,000195: 01,2101 00062 4.5SPOT DEC 50 B-14
009970,000196: 01,2102 E7,1453 EBANK= TTOGO
009971,000197: 01,2102 75211 03710 -2CADR ULLAGOFF
009972,000198:
009973,000199: 01,2104 00764 4.7SPOT DEC 500 B-14
009974,000200: 01,2105 E7,1515 EBANK= DVCNTR
009975,000201: 01,2105 75370 03710 -2CADR TIG-0
009976,000202:
009977,000203: 01,2107 76260 4.11SPOT -GENADR TGO +1
009978,000204: 01,2110 E7,1515 EBANK= DVCNTR
009979,000205: 01,2110 74231 03710 -2CADR ENGOFTSK
009980,000206:
009981,000207: 01,2112 12000 4.13SPOT OCT 12000
009982,000208: 01,2113 E7,1462 EBANK= TRKMKCNT
009983,000209: 01,2113 03227 74067 2CADR POSTBURN
009984,000210:
009985,000211: 01,2115 00764 4.15SPOT DEC 500 B-14
009986,000212: 01,2116 E7,1453 EBANK= TTOGO
009987,000213: 01,2116 75477 03710 -2CADR TIG-30
009988,000214:
009989,000215: 01,2120 77777 4.17SPOT OCT 77777
009990,000216: 01,2121 E7,1515 EBANK= DVCNTR
009991,000217: 01,2121 75423 03710 -2CADR TIG-5
009992,000218:
009993,000219: 01,2123 13000 4.21SPOT OCT 13000
009994,000220: 01,2124 E5,1730 EBANK= STAR
009995,000221: 01,2124 03012 30065 2CADR R51.1 +1
009996,000222:
009997,000223: 01,2126 77777 4.23SPOT OCT 77777
009998,000224: 01,2127 E7,1515 EBANK= DVCNTR
009999,000225: 01,2127 75345 03710 -2CADR IGNITION
010000,000226:
010001,000227: 01,2131 01477 4.25SPOT GENADR SAVET-30
010002,000228: 01,2132 75535 -GENADR TIG-35
010003,000229: 01,2133 E7,1477 EBANK= SAVET-30
010004,000230: 01,2133 74067 BBCON TIG-35
010005,000231:
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010007,000233: 01,2134 52777 4.27SPOT OCT 52777
010008,000234: 01,2135 E7,1515 EBANK= DVCNTR
010009,000235: 01,2135 02070 42067 2CADR P70A
010010,000236:
010011,000237: 01,2137 52777 4.31SPOT OCT 52777
010012,000238: 01,2140 E7,1515 EBANK= DVCNTR
010013,000239: 01,2140 02073 42067 2CADR P71A
010014,000240:
010015,000241: 01,2142 46777 4.33SPOT OCT 46777
010016,000242: 01,2143 E7,1515 EBANK= DVCNTR
010017,000243: 01,2143 02024 10067 2CADR GOPOOFIX
010018,000244:
010019,000245: 01,2145 46777 4.35SPOT OCT 46777
010020,000246: 01,2146 E7,1515 EBANK= DVCNTR
010021,000247: 01,2146 05655 04067 2CADR GOPOODOO
010022,000248:
010023,000249: 01,2150 52777 4.37SPOT OCT 52777
010024,000250: 01,2151 E7,1455 EBANK= WHICH
010025,000251: 01,2151 02575 74067 2CADR COMFAIL
010026,000252:
010027,000253: # ANY MORE 4.ODD RESTART VALUES SHOULD GO HERE.
010028,000254: 01,2153 22000 5.2SPOT OCT 22000
010029,000255: 01,2154 E7,1515 EBANK= DVCNTR
010030,000256: 01,2154 02463 46067 2CADR NORMLIZE
010031,000257:
010032,000258: 01,2156 00310 DEC 200 B-14
010033,000259: 01,2157 E7,1515 EBANK= DVCNTR
010034,000260: 01,2157 74166 01710 -2CADR REREADAC
010035,000261:
010036,000262: 01,2161 00310 5.4SPOT DEC 200 B-14
010037,000263: 01,2162 E7,1515 EBANK= DVCNTR
010038,000264: 01,2162 74166 01710 -2CADR REREADAC
010039,000265:
010040,000266: 01,2164 20000 OCT 20000
010041,000267: 01,2165 E7,1515 EBANK= DVCNTR
010042,000268: 01,2165 02206 66067 2CADR SERVICER
010043,000269:
010044,000270: # ANY MORE GROUP 5.EVEN RESTART VALUES SHOULD GO HERE
010045,000271:
010046,000272: 01,2167 00310 5.3SPOT DEC 200 B-14
010047,000273: 01,2170 E7,1515 EBANK= DVCNTR
010048,000274: 01,2170 74166 01710 -2CADR REREADAC
010049,000275:
010050,000276: 01,2172 77777 5.5SPOT OCT 77777
010051,000277: 01,2173 E7,1515 EBANK= DVCNTR
010052,000278: 01,2173 74326 01710 -2CADR REDO5.5
010053,000279:
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010055,000281: 01,2175 77777 5.7SPOT OCT 77777
010056,000282: 01,2176 E7,1515 EBANK= DVCNTR
010057,000283: 01,2176 74361 01710 -2CADR BIBIBIAS
010058,000284:
010059,000285: # ANY MORE GROUP 5.ODD RESTART VALUES SHOULD GO HERE
010060,000286:
010061,000287: 01,2200 01,2016 6.2SPOT EQUALS 1.2SPOT
010062,000288: 01,2200 00144 6.3SPOT DEC 100 B-14
010063,000289: 01,2201 E7,1441 EBANK= TIG
010064,000290: 01,2201 75054 03710 -2CADR CLOKTASK
010065,000291:
010066,000292: 01,2203 30000 6.5SPOT OCT 30000 # PROTECT INCREMENTING OF TIME2,TIME1 BY
010067,000293: 01,2204 E3,1706 EBANK= TEPHEM # P27(UPDATE PROGRAM) VIA V70 OR V73.
010068,000294: 01,2204 03557 10063 2CADR TIMEDIDR
010069,000295:
010070,000296: 01,2206 17000 6.7SPOT OCT 17000
010071,000297: 01,2207 E7,1700 EBANK= VGPREV
010072,000298: 01,2207 03354 74067 2CADR REDO6.7
010073,000299:
010074,000300:
End of include-file RESTART_TABLES.agc. Parent file is MAIN.agc