Source Code
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These source-code files are part of a reconstructed copy of Luminary 69/2,
the flown, final release of the Apollo 10 Lunar Module (LM) Apollo Guidance Computer (AGC) software.
The reconstruction is based on the source code of Luminary 69 — i.e., the
initial, unflown version, "revision 0" — of which
a contemporary listing was available. The code was then updated by incorporating the
differences between Luminary 69 and Luminary 69/2, known from other contemporary
documentation. The only such difference is the implementation in
Luminary 69/2 of the "R-2 Lunar Potential Model", the source code for which was taken
from program Luminary 99/1 (Apollo 11 LM), of which a contemporary listing was also available.
Finally, the now-reconstructed Luminary 69/2 was then validated by assembling it to
executable form and verifying that its memory banks had the correct checksums,
known from still other contemporary documentation.
Note that page numbers in the reconstructed code match those in the original Luminary 69
program listing, or in the ORBITAL INTEGRATION log section, in Luminary 99/1. Page numbers
would certainly differ somewhat in a contemporary Luminary 69/2 listing.
Moreover, annotations that were not present in the contemporary source code have been added
to the reconstructed code to justify each change in Luminary 69/2 relative to
Luminary 69. Here's a guide to the Apollo documentation referenced in those annotations:
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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046927,000002: ## Copyright: Public domain.
046928,000003: ## Filename: FIXED-FIXED_CONSTANT_POOL.agc
046929,000004: ## Purpose: A section of LUM69 revision 2.
046930,000005: ## It is part of the reconstructed source code for the flown
046931,000006: ## version of the flight software for the Lunar Module's (LM)
046932,000007: ## Apollo Guidance Computer (AGC) for Apollo 10. The code has
046933,000008: ## been recreated from a copy of Luminary revsion 069, using
046934,000009: ## changes present in Luminary 099 which were described in
046935,000010: ## Luminary memos 75 and 78. The code has been adapted such
046936,000011: ## that the resulting bugger words exactly match those specified
046937,000012: ## for LUM69 revision 2 in NASA drawing 2021152B, which gives
046938,000013: ## relatively high confidence that the reconstruction is correct.
046939,000014: ## Reference: pp. 1090-1094
046940,000015: ## Assembler: yaYUL
046941,000016: ## Contact: Ron Burkey <info@sandroid.org>.
046942,000017: ## Website: www.ibiblio.org/apollo/index.html
046943,000018: ## Mod history: 2019-07-27 MAS Created from Luminary 69.
046944,000019:
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Page 1090
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046946,000021: 4732 BLOCK 02
046947,000022: 4732 COUNT* $$/FCONS
046948,000023:
046949,000024: # THE FOLLOWING TABLE OF 18 VALUES IS INDEXED. DO NOT INSERT OR REMOVE ANY QUANTITIES.
046950,000025:
046951,000026: 4732 37777 DPOSMAX OCT 37777 # MUST PRECEDE POSMAX
046952,000027: 4733 37777 POSMAX OCT 37777
046953,000028:
046954,000029: 4734 4734 LIMITS = NEG1/2
046955,000030:
046956,000031: 4734 57777 NEG1/2 OCT -20000 # USED BY SIN ROUTINE (MUST BE TWO
046957,000032: # LOCATIONS IN FRONT OF BIT14)
046958,000033:
046959,000034: # BIT TABLE
046960,000035:
046961,000036: 4735 40000 BIT15 OCT 40000
046962,000037: 4736 20000 BIT14 OCT 20000
046963,000038: 4737 10000 BIT13 OCT 10000
046964,000039: 4740 04000 BIT12 OCT 04000
046965,000040: 4741 02000 BIT11 OCT 02000
046966,000041: 4742 01000 BIT10 OCT 01000
046967,000042: 4743 00400 BIT9 OCT 00400
046968,000043: 4744 00200 BIT8 OCT 00200
046969,000044: 4745 00100 BIT7 OCT 00100
046970,000045: 4746 00040 BIT6 OCT 00040
046971,000046: 4747 00020 BIT5 OCT 00020
046972,000047: 4750 00010 BIT4 OCT 00010
046973,000048: 4751 00004 BIT3 OCT 00004
046974,000049: 4752 00002 BIT2 OCT 00002
046975,000050: 4753 00001 BIT1 OCT 00001
046976,000051:
046977,000052: # DO NOT DESTROY THIS COMBINATION, SINCE IT IS USED IN DOUBLE PRECISION INSTRUCTIONS.
046978,000053: 4754 77777 NEG0 OCT -0 # MUST PRECEDE ZERO
046979,000054: 4755 00000 ZERO OCT 0 # MUST FOLLOW NEG0
046980,000055: # BIT1 OCT 00001
046981,000056: # NO.WDS OCT 2 INTERPRETER
046982,000057: # OCTAL3 OCT 3 INTERPRETER
046983,000058: # R3D1 OCT 4 PINBALL
046984,000059: 4756 00005 FIVE OCT 5
046985,000060: # REVCNT OCT 6 INTERPRETER
046986,000061: 4757 00007 SEVEN OCT 7
046987,000062: # BIT4 OCT 00010
046988,000063: # R2D1 OCT 11 PINBALL
046989,000064: 4760 4320 OCT11 = R2D1 # P20S
046990,000065: # BINCON DEC 10 PINBALL (OCTAL 12)
046991,000066: 4760 00013 ELEVEN DEC 11 B-14
046992,000067: # OCT14 OCT 14 ALARM AND ABORT (FILLER)
046993,000068: 4761 00015 OCT15 OCT 15
046994,000069: # R1D1 OCT 16 PINBALL
046995,000070: 4762 00017 LOW4 OCT 17
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Page 1091
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046997,000072: # BIT5 OCT 00020
046998,000073: # ND1 OCT 21 PINBALL
046999,000074: # VD1 OCT 23 PINBALL
047000,000075: # OCT24 OCT 24 SERVICE ROUTINES
047001,000076: # MD1 OCT 25 PINBALL
047002,000077: 4763 00030 BITS4&5 OCT 30
047003,000078: # OCT31 OCT 31 SERVICE ROUTINES
047004,000079: 4764 00033 OCT33 OCT 33
047005,000080: 4765 4764 DEC27 = OCT33
047006,000081: 4765 00035 OCT35 OCT 35
047007,000082: 4766 4765 DEC29 = OCT35
047008,000083: 4766 00032 CALLCODE OCT 00032
047009,000084: # LOW5 OCT 37 PINBALL
047010,000085: # 33DEC DEC 33 PINBALL (OCTAL 41)
047011,000086: # 34DEC DEC 34 PINBALL (OCTAL 42)
047012,000087: 4767 00045 TBUILDFX DEC 37 B-14 # BUILDUP FOR CONVIENCE IN DAPTESTING
047013,000088: 4770 00046 TDECAYFX DEC 38 B-14 # CONVENIENCE FOR DAPTESTING
047014,000089: # BIT6 OCT 00040
047015,000090: 4771 00050 OCT50 OCT 50
047016,000091: 4772 00055 DEC45 DEC 45 B-14
047017,000092: 4773 00060 SUPER011 OCT 60 # BITS FOR SUPERBNK SETTING 011.
047018,000093: 4774 00062 .5SEC DEC 50 B-14
047019,000094: # BIT7 OCT 00100
047020,000095:
047021,000096: 4775 4745 SUPER100 = BIT7 # BITS FOR SUPERBNK SETTING 100
047022,000097: # (LAST 4K OF ROPE)
047023,000098: 4775 00120 SUPER101 OCT 120 # BITS FOR SUPERBNK SETTING 101
047024,000099: # OCT121 OCT 121 SERVICE ROUTINES
047025,000100: # (FIRST 8K OF ACM)
047026,000101: 4776 00140 SUPER110 OCT 140 # BITS FOR SUPERBNK SETTING 110.
047027,000102: # (LAST 8K OF ACM)
047028,000103: 4777 00144 1SEC DEC 100 B-14
047029,000104: # LOW7 OCT 177 INTERPRETER
047030,000105: # BIT8 OCT 00200
047031,000106: # OT215 OCT 215 ALARM AND ABORT
047032,000107: # 8,5 OCT 00220 P20-P25 SUNDANCE
047033,000108: 5000 00310 2SECS DEC 200 B-14
047034,000109: # LOW8 OCT 377 PINBALL
047035,000110: # BIT9 OCT 00400
047036,000111: 5001 00401 GN/CCODE OCT 00401 # SET S/C CONTROL SWITCH TO G/N
047037,000112: 5002 00454 3SECS DEC 300 B-14
047038,000113: 5003 00620 4SECS DEC 400 B-14
047039,000114: 5004 00777 LOW9 OCT 777
047040,000115: # BIT10 OCT 01000
047041,000116: # 5.5DEGS DEC .03056 P20-P25 SUNDANCE (OCTAL 00765)
047042,000117: # OCT1103 OCT 1103 ALARM AND ABORT
047043,000118: 5005 01124 C5/2 DEC .0363551 # (OCTAL 01124)
047044,000119: 5006 01211 V05N09 VN 0509 # (SAME AS OCTAL 1211)
047045,000120: 5007 01400 OCT1400 OCT 01400
047046,000121: 5010 01426 V06N22 VN 0622
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Page 1092
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047048,000123: # MID5 OCT 1740 PINBALL
047049,000124: 5011 01776 BITS2-10 OCT 1776
047050,000125: 5012 01777 LOW10 OCT 1777
047051,000126: # BIT11 OCT 02000
047052,000127: # 2K+3 OCT 2003 PINBALL
047053,000128: 5013 02177 LOW7+2K OCT 2177 # OP CODE MASK + BANK 1 FBANK SETTING.
047054,000129: 5014 02400 EBANK5 OCT 02400
047055,000130: 5015 03000 PRIO3 OCT 03000
047056,000131: 5016 03400 EBANK7 OCT 03400
047057,000132: # LOW11 OCT 3777 PINBALL
047058,000133: # BIT12 OCT 04000
047059,000134: # RELTAB OCT 04025 T4RUPT
047060,000135: 5017 05000 PRIO5 OCT 05000
047061,000136: 5020 06000 PRIO6 OCT 06000
047062,000137: 5021 07000 PRIO7 OCT 07000
047063,000138:
047064,000139: # BIT13 OCT 10000
047065,000140: # OCT 10003 T4RUPT RELTAB +1D
047066,000141: # 13,7,2 OCT 10102 P20-P25 SUNDANCE
047067,000142: 5022 11000 PRIO11 OCT 11000
047068,000143: # PRIO12 OCT 12000 BANKCALL
047069,000144: 5023 13000 PRIO13 OCT 13000
047070,000145: 5024 14000 PRIO14 OCT 14000
047071,000146: # OCT 14031 T4RUPT RELTAB +2D
047072,000147: 5025 15000 PRIO15 OCT 15000
047073,000148: 5026 16000 PRIO16 OCT 16000
047074,000149: # 85DEGS DEC .45556 P20-P25 SUNDANCE (OCTAL 16450)
047075,000150: 5027 17000 PRIO17 OCT 17000
047076,000151: 5030 17770 OCT17770 OCT 17770
047077,000152: # BIT14 OCT 20000
047078,000153: # OCT 20033 T4RUPT RELTAB +3D
047079,000154: 5031 21000 PRIO21 OCT 21000
047080,000155: 7707 BLOCK 03
047081,000156: 7707 COUNT* $$/FCONS
047082,000157: 7707 22000 PRIO22 OCT 22000 # SERVICE ROUTINES
047083,000158: 7710 23000 PRIO23 OCT 23000
047084,000159: 7711 24000 PRIO24 OCT 24000
047085,000160: # 5/8+1 OCT 24001 SINGLE PRECISION SUBROUTINES
047086,000161: # OCT 24017 T4RUPT RELTAB +4D
047087,000162: 7712 25000 PRIO25 OCT 25000
047088,000163: 7713 26000 PRIO26 OCT 26000
047089,000164: 7714 27000 PRIO27 OCT 27000
047090,000165: # CHRPRIO OCT 30000 PINBALL
047091,000166: # OCT 30036 T4RUPT RELTAB +5D
047092,000167: 7715 31000 PRIO31 OCT 31000
047093,000168: 7716 31103 C1/2 DEC .7853134 # (OCTAL 31103)
047094,000169: 7717 32000 PRIO32 OCT 32000
047095,000170: 7720 33000 PRIO33 OCT 33000
047096,000171: 7721 34000 PRIO34 OCT 34000
047097,000172: # OCT 34034 T4RUPT RELTAB +6D
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Page 1093
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047099,000174: 7722 35000 PRIO35 OCT 35000
047100,000175: 7723 36000 PRIO36 OCT 36000
047101,000176: 7724 37000 PRIO37 OCT 37000
047102,000177: 7725 37401 63/64+1 OCT 37401
047103,000178: # MID7 OCT 37600 PINBALL
047104,000179: 7726 37766 OCT37766 OCT 37766
047105,000180: 7727 37774 OCT37774 OCT 37774
047106,000181: 7730 37776 OCT37776 OCT 37776
047107,000182: # DPOSMAX OCT 37777
047108,000183: # BIT15 OCT 40000
047109,000184: # OCT40001 OCT 40001 INTERPRETER (CS 1 INSTRUCTION)
047110,000185: 7731 40014 DLOADCOD OCT 40014
047111,000186: 7732 40015 DLOAD* OCT 40015
047112,000187: # OCT 40023 T4RUPT RELTAB +7D
047113,000188: 7733 40040 BIT15+6 OCT 40040
047114,000189: 7734 40200 OCT40200 OCT 40200
047115,000190: # OCT 44035 T4RUPT RELTAB +8D
047116,000191: # OCT 50037 T4RUPT RELTAB +9D
047117,000192: # OCT 54000 T4RUPT RELTAB +10D
047118,000193: 7735 57777 -BIT14 OCT 57777
047119,000194: # RELTAB11 OCT 60000 T4RUPT
047120,000195: 7736 65552 C3/2 DEC -.3216147 # (OCTAL 65552)
047121,000196: 7737 70000 13,14,15 OCT 70000
047122,000197: 7740 73777 -1/8 OCT 73777
047123,000198: 7741 74000 HIGH4 OCT 74000
047124,000199: 7742 74056 -ENDERAS DEC -2001 B-14 # (OCTAL 74056)
047125,000200: # HI5 OCT 76000 PINBALL
047126,000201: 7743 77700 HIGH9 OCT 77700
047127,000202: # -ENDVAC DEC -45 INTERPRETER (OCTAL 77722)
047128,000203: # -OCT10 OCT -10 (OCT 77767)
047129,000204: # NEG4 DEC -4 (OCTAL 77773)
047130,000205: 7744 77774 NEG3 DEC -3 B-14
047131,000206: 7745 77775 NEG2 OCT 77775
047132,000207: 7746 77776 NEGONE DEC -1 B-14
047133,000208:
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Page 1094
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047135,000210:
047136,000211: # DEFINED BY EQUALS
047137,000212:
047138,000213: # IT WOULD BE TO THE USERS ADVANTAGE TO OCCASIONALLY CHECK ANY OF THESE SYMBOLS IN ORDER TO PREVENT ANY
047139,000214: # ACCIDENTAL DEFINITION CHANGES.
047140,000215:
047141,000216: 7747 7746 MINUS1 = NEG1
047142,000217: 7747 7746 NEG1 = NEGONE
047143,000218: 7747 4753 ONE = BIT1
047144,000219: 7747 4752 TWO = BIT2
047145,000220: 7747 6244 THREE = OCTAL3
047146,000221: 7747 6244 LOW2 = THREE
047147,000222: 7747 4751 FOUR = BIT3
047148,000223: 7747 6241 SIX = REVCNT
047149,000224: 7747 4757 LOW3 = SEVEN
047150,000225: 7747 4750 EIGHT = BIT4
047151,000226: 7747 4320 NINE = R2D1
047152,000227: 7747 4363 TEN = BINCON
047153,000228: 7747 4760 NOUTCON = ELEVEN
047154,000229: 7747 4360 OCT23 = VD1
047155,000230: 7747 4362 OCT25 = MD1
047156,000231: 7747 4742 PRIO1 = BIT10
047157,000232: 7747 5007 EBANK3 = OCT1400
047158,000233: 7747 4741 PRIO2 = BIT11
047159,000234: 7747 4775 OCT120 = SUPER101
047160,000235: 7747 4776 OCT140 = SUPER110
047161,000236: 7747 4741 2K = BIT11
047162,000237: 7747 4741 EBANK4 = BIT11
047163,000238: 7747 4740 PRIO4 = BIT12
047164,000239: 7747 5015 EBANK6 = PRIO3
047165,000240: 7747 4737 QUARTER = BIT13
047166,000241: 7747 4737 PRIO10 = BIT13
047167,000242: 7747 7662 OCT10001 = CCSL
047168,000243: 7747 4736 POS1/2 = HALF
047169,000244: 7747 4736 PRIO20 = BIT14
047170,000245: 7747 4736 HALF = BIT14
047171,000246: 7747 4355 PRIO30 = CHRPRIO
047172,000247: 7747 4355 BIT13-14 = PRIO30 # INTERPRETER USES IN PROCESSING STORECODE
047173,000248: 7747 6470 OCT30002 = TLOAD +1
047174,000249: 7747 7721 B12T14 = PRIO34
047175,000250: 7747 4735 NEGMAX = BIT15
047176,000251: 7747 4735 VLOADCOD = BIT15
047177,000252: 7747 6106 VLOAD* = OCT40001
047178,000253: 7747 4101 OCT60000 = RELTAB11
047179,000254: 7747 4350 BANKMASK = HI5
047180,000255:
End of include-file FIXED-FIXED_CONSTANT_POOL.agc. Parent file is MAIN.agc