Source Code
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These source-code files are part of a reconstructed copy of Comanche 72/3 (AKA Manche72 revision 3),
the final, flown mission release of the Apollo Guidance Computer (AGC) Command Module (CM) software
for Apollo 13.
The starting point was the source code of Comanche 72 (itself previously reconstructed). Comanche 72
source code was then modified by incorporating changes known from contemporary documentation to have
been made between revisions 72 and 72/3. The resulting code assembles to have identical
memory-bank checksums as those specified in NASA drawing 2021153G; this gives reasonably
high confidence that the changes that have been made are correct. In places where
ambiguity exists, this ambiguity is discussed in "## Reconstruction:" comments.
Since no contemporary listings of Comanche 72/3 are available as source material,
all comments and labels are approximate.
They have been taken from other AGC programs where possible, or, in some places, written
from scratch to match what we believe would have been in the original listing.
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050136,000002: ## Copyright: Public domain.
050137,000003: ## Filename: FIXED-FIXED_CONSTANT_POOL.agc
050138,000004: ## Purpose: A section of Manche72 revision 3.
050139,000005: ## It is part of the reconstructed source code for the final, flown
050140,000006: ## release of the software for the Command Module's (CM) Apollo
050141,000007: ## Guidance Computer (AGC) for Apollo 13. No original listings
050142,000008: ## of this program are available; instead, this file was recreated
050143,000009: ## from a reconstructed copy of Comanche 072. It has been adapted
050144,000010: ## such that the resulting bugger words exactly match those
050145,000011: ## specified for Manche72 revision 3 in NASA drawing 2021153G,
050146,000012: ## which gives relatively high confidence that the reconstruction
050147,000013: ## is correct.
050148,000014: ## Assembler: yaYUL
050149,000015: ## Contact: Ron Burkey <info@sandroid.org>.
050150,000016: ## Website: www.ibiblio.org/apollo/index.html
050151,000017: ## Mod history: 2024-05-19 MAS Created from Comanche 072.
050152,000018:
050153,000019: 5012 BLOCK 02
050154,000020: 5012 COUNT 02/FCONS
050155,000021:
050156,000022: # THE FOLLOWING TABLE OF 18 VALUES IS INDEXED. DO NOT INSERT OR REMOVE ANY QUANTITIES.
050157,000023:
050158,000024: 5012 37777 DPOSMAX OCT 37777 # MUST PRECEDE POSMAX
050159,000025: 5013 37777 POSMAX OCT 37777
050160,000026:
050161,000027: 5014 5014 LIMITS = NEG1/2
050162,000028:
050163,000029: 5014 57777 NEG1/2 OCT -20000 # USED BY SIN ROUTINE (MUST BE TWO
050164,000030: # LOCATIONS IN FRONT OF BIT14)
050165,000031:
050166,000032: # BIT TABLE
050167,000033:
050168,000034: 5015 40000 BIT15 OCT 40000
050169,000035: 5016 20000 BIT14 OCT 20000
050170,000036: 5017 10000 BIT13 OCT 10000
050171,000037: 5020 04000 BIT12 OCT 04000
050172,000038: 5021 02000 BIT11 OCT 02000
050173,000039: 5022 01000 BIT10 OCT 01000
050174,000040: 5023 00400 BIT9 OCT 00400
050175,000041: 5024 00200 BIT8 OCT 00200
050176,000042: 5025 00100 BIT7 OCT 00100
050177,000043: 5026 00040 BIT6 OCT 00040
050178,000044: 5027 00020 BIT5 OCT 00020
050179,000045: 5030 00010 BIT4 OCT 00010
050180,000046: 5031 00004 BIT3 OCT 00004
050181,000047: 5032 00002 BIT2 OCT 00002
050182,000048: 5033 00001 BIT1 OCT 00001
050183,000049:
050184,000050: # DO NOT DESTROY THIS COMBINATION, SINCE IT IS USED IN DOUBLE PRECISION INSTRUCTIONS.
050185,000051: 5034 77777 NEG0 OCT -0 # MUST PRECEDE ZERO
050186,000052: 5035 00000 ZERO OCT 0 # MUST FOLLOW NEG0
050187,000053: # BIT1 OCT 00001
050188,000054: # NO.WDS OCT 2 INTERPRETER
050189,000055: # OCTAL3 OCT 3 INTERPRETER
050190,000056: # R3D1 OCT 4 PINBALL
050191,000057: 5036 00005 FIVE OCT 5
050192,000058: # REVCNT OCT 6 INTERPRETER
050193,000059: 5037 00007 SEVEN OCT 7
050194,000060: # BIT4 OCT 00010
050195,000061: # R2D1 OCT 11 PINBALL
050196,000062: 5040 4334 OCT11 = R2D1 # P20S
050197,000063: # BINCON DEC 10 PINBALL (OCTAL 12)
050198,000064: 5040 00013 ELEVEN DEC 11 B-14
050199,000065: # OCT14 OCT 14 ALARM AND ABORT (FILLER)
050200,000066: 5041 00015 OCT15 OCT 15
050201,000067: # R1D1 OCT 16 PINBALL
050202,000068: 5042 00017 LOW4 OCT 17
050203,000069: # BIT5 OCT 00020
050204,000070: # ND1 OCT 21 PINBALL
050205,000071: # VD1 OCT 23 PINBALL
050206,000072: # OCT24 OCT 24 SERVICE ROUTINES
050207,000073: # MD1 OCT 25 PINBALL
050208,000074: 5043 00030 BITS4&5 OCT 30
050209,000075: # OCT31 OCT 31 SERVICE ROUTINES
050210,000076: 5044 00032 CALLCODE OCT 00032
050211,000077: # LOW5 OCT 37 PINBALL
050212,000078: # 33DEC DEC 33 PINBALL (OCTAL 41)
050213,000079: # 34DEC DEC 34 PINBALL (OCTAL 42)
050214,000080: 5045 00045 TBUILDFX DEC 37 B-14 # BUILDUP FOR CONVIENCE IN DAPTESTING
050215,000081: 5046 00046 TDECAYFX DEC 38 B-14 # CONVENIENCE FOR DAPTESTING
050216,000082: # BIT6 OCT 00040
050217,000083: 5047 00050 OCT50 OCT 50
050218,000084: 5050 00055 DEC45 DEC 45 B-14
050219,000085: 5051 00060 SUPER011 OCT 60 # BITS FOR SUPERBNK SETTING 011.
050220,000086: 5052 00062 .5SEC DEC 50 B-14
050221,000087: # BIT7 OCT 00100
050222,000088:
050223,000089: 5053 5025 SUPER100 = BIT7 # BITS FOR SUPERBNK SETTING 100
050224,000090: # (LAST 4K OF ROPE)
050225,000091: 5053 00120 SUPER101 OCT 120 # BITS FOR SUPERBNK SETTING 101
050226,000092: # OCT121 OCT 121 SERVICE ROUTINES
050227,000093: # (FIRST 8K OF ACM)
050228,000094: 5054 00140 SUPER110 OCT 140 # BITS FOR SUPERBNK SETTING 110.
050229,000095: # (LAST 8K OF ACM)
050230,000096: 5055 00144 1SEC DEC 100 B-14
050231,000097: # LOW7 OCT 177 INTERPRETER
050232,000098: # BIT8 OCT 00200
050233,000099: # OT215 OCT 215 ALARM AND ABORT
050234,000100: # 8,5 OCT 00220 P20-P25 SUNDANCE
050235,000101: 5056 00310 2SECS DEC 200 B-14
050236,000102: # LOW8 OCT 377 PINBALL
050237,000103: # BIT9 OCT 00400
050238,000104: 5057 00401 GN/CCODE OCT 00401 # SET S/C CONTROL SWITCH TO G/N
050239,000105: 5060 00454 3SECS DEC 300 B-14
050240,000106: 5061 00620 4SECS DEC 400 B-14
050241,000107: 5062 00777 LOW9 OCT 777
050242,000108: # BIT10 OCT 01000
050243,000109: # 5.5DEGS DEC .03056 P20-P25 SUNDANCE (OCTAL 00765)
050244,000110: # OCT1103 OCT 1103 ALARM AND ABORT
050245,000111: 5063 01124 C5/2 DEC .0363551 # (OCTAL 01124)
050246,000112: 5064 01211 V05N09 VN 0509 # (SAME AS OCTAL 1211)
050247,000113: 5065 01400 OCT1400 OCT 01400
050248,000114: 5066 01426 V06N22 VN 0622
050249,000115: # MID5 OCT 1740 PINBALL
050250,000116: 5067 01776 BITS2-10 OCT 1776
050251,000117: 5070 01777 LOW10 OCT 1777
050252,000118: # BIT11 OCT 02000
050253,000119: # 2K+3 OCT 2003 PINBALL
050254,000120: 5071 02177 LOW7+2K OCT 2177 # OP CODE MASK + BANK 1 FBANK SETTING.
050255,000121: 5072 02400 EBANK5 OCT 02400
050256,000122: 5073 03000 PRIO3 OCT 03000
050257,000123: 5074 03400 EBANK7 OCT 03400
050258,000124: # LOW11 OCT 3777 PINBALL
050259,000125: # BIT12 OCT 04000
050260,000126: # RELTAB OCT 04025 T4RUPT
050261,000127: 5075 05000 PRIO5 OCT 05000
050262,000128: 5076 06000 PRIO6 OCT 06000
050263,000129: 5077 07000 PRIO7 OCT 07000
050264,000130:
050265,000131: # BIT13 OCT 10000
050266,000132: # OCT 10003 T4RUPT RELTAB +1D
050267,000133: # 13,7,2 OCT 10102 P20-P25 SUNDANCE
050268,000134: 5100 11000 PRIO11 OCT 11000
050269,000135: # PRIO12 OCT 12000 BANKCALL
050270,000136: 5101 13000 PRIO13 OCT 13000
050271,000137: 5102 14000 PRIO14 OCT 14000
050272,000138: # OCT 14031 T4RUPT RELTAB +2D
050273,000139: 5103 15000 PRIO15 OCT 15000
050274,000140: 5104 16000 PRIO16 OCT 16000
050275,000141: # 85DEGS DEC .45556 P20-P25 SUNDANCE (OCTAL 16450)
050276,000142: 5105 17000 PRIO17 OCT 17000
050277,000143: 5106 17770 OCT17770 OCT 17770
050278,000144: # BIT14 OCT 20000
050279,000145: # OCT 20033 T4RUPT RELTAB +3D
050280,000146: 5107 21000 PRIO21 OCT 21000
050281,000147: 7657 BLOCK 03
050282,000148: 7657 COUNT 03/FCONS
050283,000149:
050284,000150: 7657 22000 PRIO22 OCT 22000 # SERVICE ROUTINES
050285,000151: 7660 23000 PRIO23 OCT 23000
050286,000152: 7661 24000 PRIO24 OCT 24000
050287,000153: # 5/8+1 OCT 24001 SINGLE PRECISION SUBROUTINES
050288,000154: # OCT 24017 T4RUPT RELTAB +4D
050289,000155: 7662 25000 PRIO25 OCT 25000
050290,000156: 7663 26000 PRIO26 OCT 26000
050291,000157: 7664 27000 PRIO27 OCT 27000
050292,000158: # CHRPRIO OCT 30000 PINBALL
050293,000159: # OCT 30036 T4RUPT RELTAB +5D
050294,000160: 7665 31000 PRIO31 OCT 31000
050295,000161: 7666 31103 C1/2 DEC .7853134 # (OCTAL 31103)
050296,000162: 7667 32000 PRIO32 OCT 32000
050297,000163: 7670 33000 PRIO33 OCT 33000
050298,000164: 7671 34000 PRIO34 OCT 34000
050299,000165: # OCT 34034 T4RUPT RELTAB +6D
050300,000166: 7672 35000 PRIO35 OCT 35000
050301,000167: 7673 36000 PRIO36 OCT 36000
050302,000168: 7674 37000 PRIO37 OCT 37000
050303,000169: 7675 37401 63/64+1 OCT 37401
050304,000170: # MID7 OCT 37600 PINBALL
050305,000171: 7676 37766 OCT37766 OCT 37766
050306,000172: 7677 37774 OCT37774 OCT 37774
050307,000173: 7700 37776 OCT37776 OCT 37776
050308,000174: # DPOSMAX OCT 37777
050309,000175: # BIT15 OCT 40000
050310,000176: # OCT40001 OCT 40001 INTERPRETER (CS 1 INSTRUCTION)
050311,000177: 7701 40014 DLOADCOD OCT 40014
050312,000178: 7702 40015 DLOAD* OCT 40015
050313,000179: # OCT 40023 T4RUPT RELTAB +7D
050314,000180: 7703 40040 BIT15+6 OCT 40040
050315,000181: 7704 40200 OCT40200 OCT 40200
050316,000182: # OCT 44035 T4RUPT RELTAB +8D
050317,000183: # OCT 50037 T4RUPT RELTAB +9D
050318,000184: # OCT 54000 T4RUPT RELTAB +10D
050319,000185: 7705 57777 -BIT14 OCT 57777
050320,000186: # RELTAB11 OCT 60000 T4RUPT
050321,000187: 7706 65552 C3/2 DEC -.3216147 # (OCTAL 65552)
050322,000188: 7707 70000 13,14,15 OCT 70000
050323,000189: 7710 73777 -1/8 OCT 73777
050324,000190: 7711 74000 HIGH4 OCT 74000
050325,000191: 7712 74056 -ENDERAS DEC -2001 B-14 # (OCTAL 74056)
050326,000192: # HI5 OCT 76000 PINBALL
050327,000193: 7713 77700 HIGH9 OCT 77700
050328,000194: # -ENDVAC DEC -45 INTERPRETER (OCTAL 77722)
050329,000195: # -OCT10 OCT -10 (OCT 77767)
050330,000196: # NEG4 DEC -4 (OCTAL 77773)
050331,000197: 7714 77774 NEG3 DEC -3 B-14
050332,000198: 7715 77775 NEG2 OCT 77775
050333,000199: 7716 77776 NEGONE DEC -1 B-14
050334,000200:
050335,000201:
050336,000202: # DEFINED BY EQUALS
050337,000203:
050338,000204: # IT WOULD BE TO THE USERS ADVANTAGE TO OCCASIONALLY CHECK ANY OF THESE SYMBOLS IN ORDER TO PREVENT ANY
050339,000205: # ACCIDENTAL DEFINITION CHANGES.
050340,000206:
050341,000207: 7717 7716 MINUS1 = NEG1
050342,000208: 7717 7716 NEG1 = NEGONE
050343,000209: 7717 5033 ONE = BIT1
050344,000210: 7717 5032 TWO = BIT2
050345,000211: 7717 6214 THREE = OCTAL3
050346,000212: 7717 6214 LOW2 = THREE
050347,000213: 7717 5031 FOUR = BIT3
050348,000214: 7717 6211 SIX = REVCNT
050349,000215: 7717 5037 LOW3 = SEVEN
050350,000216: 7717 5030 EIGHT = BIT4
050351,000217: 7717 4334 NINE = R2D1
050352,000218: 7717 4377 TEN = BINCON
050353,000219: 7717 5040 NOUTCON = ELEVEN
050354,000220: 7717 4374 OCT23 = VD1
050355,000221: 7717 4376 OCT25 = MD1
050356,000222: 7717 5022 PRIO1 = BIT10
050357,000223: 7717 5065 EBANK3 = OCT1400
050358,000224: 7717 5021 PRIO2 = BIT11
050359,000225: 7717 5053 OCT120 = SUPER101
050360,000226: 7717 5054 OCT140 = SUPER110
050361,000227: 7717 5021 2K = BIT11
050362,000228: 7717 5021 EBANK4 = BIT11
050363,000229: 7717 5020 PRIO4 = BIT12
050364,000230: 7717 5073 EBANK6 = PRIO3
050365,000231: 7717 5017 QUARTER = BIT13
050366,000232: 7717 5017 PRIO10 = BIT13
050367,000233: 7717 7632 OCT10001 = CCSL
050368,000234: 7717 5016 POS1/2 = HALF
050369,000235: 7717 5016 PRIO20 = BIT14
050370,000236: 7717 5016 HALF = BIT14
050371,000237: 7717 4371 PRIO30 = CHRPRIO
050372,000238: 7717 4371 BIT13-14 = PRIO30 # INTERPRETER USES IN PROCESSING STORECODE
050373,000239: 7717 6440 OCT30002 = TLOAD +1
050374,000240: 7717 7671 B12T14 = PRIO34
050375,000241: 7717 5015 NEGMAX = BIT15
050376,000242: 7717 5015 VLOADCOD = BIT15
050377,000243: 7717 6056 VLOAD* = OCT40001
050378,000244: 7717 4105 OCT60000 = RELTAB11
050379,000245: 7717 4364 BANKMASK = HI5
050380,000246:
End of include-file FIXED-FIXED_CONSTANT_POOL.agc. Parent file is MAIN.agc