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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035806,000002: ## Copyright: Public domain.
035807,000003: ## Filename: P12.agc
035808,000004: ## Purpose: A section of Luminary revision 96.
035809,000005: ## It is part of the reconstructed source code for the
035810,000006: ## original release of the flight software for the Lunar
035811,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
035812,000008: ## The code has been recreated from a previously reconstructed
035813,000009: ## copy of Luminary 97 by undoing changes described in anomaly
035814,000010: ## report LNY-59. The code has been adapted such that the
035815,000011: ## resulting bugger words exactly match those specified for
035816,000012: ## Luminary 96 in NASA drawing 2021152D, which gives relatively
035817,000013: ## high confidence that the reconstruction is correct.
035818,000014: ## Reference: pp. 838-842
035819,000015: ## Assembler: yaYUL
035820,000016: ## Contact: Ron Burkey <info@sandroid.org>.
035821,000017: ## Website: www.ibiblio.org/apollo/index.html
035822,000018: ## Mod history: 2019-08-04 MAS Created from Luminary 97.
035823,000019:
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Page 838
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035825,000021: 24,3670 BANK 24
035826,000022: 30,2000 SETLOC P12
035827,000023: 30,2000 BANK
035828,000024:
035829,000025: 30,2061 E7,1515 EBANK= DVCNTR
035830,000026: 30,2061 COUNT* $$/P12
035831,000027:
035832,000028: 30,2061 05353 P12LM TC PHASCHNG
035833,000029: 30,2062 04024 OCT 04024
035834,000030:
035835,000031: 30,2063 04616 TC BANKCALL
035836,000032: 30,2064 11254 CADR R02BOTH # CHECK THE STATUS OF THE IMU.
035837,000033:
035838,000034: 30,2065 05504 TC UPFLAG
035839,000035: 30,2066 00141 ADRES MUNFLAG
035840,000036:
035841,000037: 30,2067 05504 TC UPFLAG # INSURE 4-JET TRANSLATION CAPABILITY.
035842,000038: 30,2070 00307 ADRES ACC4-2FL
035843,000039:
035844,000040: 30,2071 05504 TC UPFLAG # PREVENT R10 FROM ISSUING CROSS-POINTER
035845,000041: 30,2072 00015 ADRES R10FLAG # OUTPUTS.
035846,000042:
035847,000043: 30,2073 06011 TC CLRADMOD # INITIALIZE RADMODES FOR R29.
035848,000044:
035849,000045: 30,2074 05516 TC DOWNFLAG # CLEAR RENDEZVOUS FLAG FOR P22
035850,000046: 30,2075 00010 ADRES RNDVZFLG
035851,000047:
035852,000048: 30,2076 36000 CAF THRESH2 # INITIALIZE DVMON
035853,000049: 30,2077 55251 TS DVTHRUSH
035854,000050: 30,2100 34751 CAF FOUR
035855,000051: 30,2101 55515 TS DVCNTR
035856,000052:
035857,000053: 30,2102 34755 CA ZERO
035858,000054: 30,2103 55462 TS TRKMKCNT # SHOW THAT R29 DOWNLINK DATA ISN'T READY.
035859,000055: 30,2104 33035 CAF V06N33A
035860,000056: 30,2105 04616 TC BANKCALL # FLASH TIG
035861,000057: 30,2106 20476 CADR GOFLASH
035862,000058: 30,2107 16001 TCF GOTOPOOH
035863,000059: 30,2110 12112 TCF +2 # PROCEED
035864,000060: 30,2111 12104 TCF -5 # ENTER
035865,000061:
035866,000062: 30,2112 05353 TC PHASCHNG
035867,000063: 30,2113 04024 OCT 04024
035868,000064:
035869,000065: 30,2114 06037 TC INTPRET
035870,000066: 30,2115 77624 CALL # INITIALIZE WM AND /LAND/
035871,000067: 30,2116 46432 GUIDINIT
035872,000068: 30,2117 45014 SET CALL
035873,000069: 30,2120 04464 FLPI
035874,000070: 30,2121 60254 P12INIT
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Page 839
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035876,000072: 30,2122 77745 P12LMB DLOAD
035877,000073: 30,2123 25761 (TGO)A # SET TGO TO AN INITIAL NOMINAL VALUE.
035878,000074: 30,2124 17517 STODL TGO
035879,000075: 30,2125 03442 TIG
035880,000076: 30,2126 34041 STCALL TDEC1
035881,000077: 30,2127 27057 LEMPREC # ROTATE THE STATE VECTORS TO THE
035882,000078: 30,2130 64375 VLOAD MXV # IGNITION TIME.
035883,000079: 30,2131 00007 VATT
035884,000080: 30,2132 01734 REFSMMAT
035885,000081: 30,2133 77772 VSL1
035886,000082: 30,2134 27601 STOVL V1S # COMPUTE V1S = VEL(TIG)*2(-7) M/CS.
035887,000083: 30,2135 00001 RATT
035888,000084: 30,2136 52521 MXV VSL6
035889,000085: 30,2137 01734 REFSMMAT
035890,000086: 30,2140 37521 STCALL R # COMPUTE R = POS(TIG)*2(-24) M.
035891,000087: 30,2141 67130 MUNGRAV # COMPUTE GDT1/2(TIG)*2(-7)M/CS.
035892,000088: 30,2142 53575 VLOAD UNIT
035893,000089: 30,2143 03521 R
035894,000090: 30,2144 37537 STCALL UNIT/R/ # COMPUTE UNIT/R/ FOR YCOMP.
035895,000091: 30,2145 57312 YCOMP
035896,000092: 30,2146 57461 SR DCOMP
035897,000093: 30,2147 20606 5D
035898,000094: 30,2150 17643 STODL XRANGE # INITIALIZE XRANGE FOR NOUN 76.
035899,000095: 30,2151 06456 VINJNOM
035900,000096: 30,2152 16277 STODL ZDOTD
035901,000097: 30,2153 06460 RDOTDNOM
035902,000098: 30,2154 02273 STORE RDOTD
035903,000099: 30,2155 77776 EXIT
035904,000100:
035905,000101: 30,2156 05353 TC PHASCHNG
035906,000102: 30,2157 04024 OCT 04024
035907,000103:
035908,000104: 30,2160 33034 NEWLOAD CAF V06N76 # FLASH CROSS-RANGE AND APOLUNE VALUES.
035909,000105: 30,2161 04616 TC BANKCALL
035910,000106: 30,2162 20476 CADR GOFLASH
035911,000107: 30,2163 16001 TCF GOTOPOOH
035912,000108: 30,2164 12166 TCF +2 # PROCEED
035913,000109: 30,2165 12160 TCF NEWLOAD # ENTER NEW DATA.
035914,000110:
035915,000111: 30,2166 32320 CAF P12ADRES
035916,000112: 30,2167 55455 TS WHICH
035917,000113:
035918,000114: 30,2170 05353 TC PHASCHNG
035919,000115: 30,2171 04024 OCT 04024
035920,000116:
035921,000117: 30,2172 06037 TC INTPRET
035922,000118: 30,2173 54345 DLOAD SL
035923,000119: 30,2174 03643 XRANGE
035924,000120: 30,2175 20206 5D
035925,000121: 30,2176 77615 DAD
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Page 840
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035927,000123: 30,2177 02335 Y
035928,000124: 30,2200 27633 STOVL YCO
035929,000125: 30,2201 03537 UNIT/R/
035930,000126: 30,2202 53361 VXSC VAD
035931,000127: 30,2203 06454 49FPS
035932,000128: 30,2204 03601 V1S
035933,000129: 30,2205 03527 STORE V # V(TIPOVER) = V(IGN) + 57FPS (UNIT/R/)
035934,000130: 30,2206 72441 DOT SL1
035935,000131: 30,2207 03537 UNIT/R/
035936,000132: 30,2210 27474 STOVL RDOT # RDOT * 2(-7)
035937,000133: 30,2211 03537 UNIT/R/
035938,000134: 30,2212 53435 VXV UNIT
035939,000135: 30,2213 03720 QAXIS
035940,000136: 30,2214 03726 STORE ZAXIS1
035941,000137: 30,2215 77614 SETGO
035942,000138: 30,2216 04421 FLVR
035943,000139: 30,2217 60321 ASCENT
035944,000140: 30,2220 77745 P12RET DLOAD
035945,000141: 30,2221 02361 ATP # ATP(2)*2(18)
035946,000142: 30,2222 65316 DSQ PDDL
035947,000143: 30,2223 02355 ATY # ATY(2)*2(18)
035948,000144: 30,2224 43316 DSQ DAD
035949,000145: 30,2225 75454 BZE SQRT
035950,000146: 30,2226 60232 YAWDUN
035951,000147: 30,2227 55352 SL1 BDDV
035952,000148: 30,2230 02355 ATY
035953,000149: 30,2231 77736 ARCSIN
035954,000150: 30,2232 26363 YAWDUN STOVL YAW
035955,000151: 30,2233 03254 UNFC/2
035956,000152: 30,2234 50256 UNIT DOT
035957,000153: 30,2235 03537 UNIT/R/
035958,000154: 30,2236 65552 SL1 ARCCOS
035959,000155: 30,2237 77676 DCOMP
035960,000156: 30,2240 02365 STORE PITCH
035961,000157: 30,2241 77776 EXIT
035962,000158: 30,2242 05353 TC PHASCHNG
035963,000159: 30,2243 04024 OCT 04024
035964,000160:
035965,000161: 30,2244 05516 TC DOWNFLAG
035966,000162: 30,2245 00213 ADRES FLPI
035967,000163:
035968,000164: 30,2246 00004 INHINT
035969,000165: 30,2247 04674 TC IBNKCALL
035970,000166: 30,2250 40142 CADR PFLITEDB
035971,000167: 30,2251 00003 RELINT
035972,000168:
035973,000169: 30,2252 04635 TC POSTJUMP
035974,000170: 30,2253 74126 CADR BURNBABY
035975,000171:
035976,000172: 30,2254 77745 P12INIT DLOAD # INITIALIZE ENGINE DATA. USED FOR P12 AND
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Page 841
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035978,000174: 30,2255 16013 (1/DV)A # P71.
035979,000175: 30,2256 03641 STORE 1/DV3
035980,000176: 30,2257 03637 STORE 1/DV2
035981,000177: 30,2260 17635 STODL 1/DV1
035982,000178: 30,2261 16017 (AT)A
035983,000179: 30,2262 16263 STODL AT
035984,000180: 30,2263 16021 (TBUP)A
035985,000181: 30,2264 16271 STODL TBUP
035986,000182: 30,2265 34013 ATDECAY
035987,000183: 30,2266 54276 DCOMP SL
035988,000184: 30,2267 20214 11D
035989,000185: 30,2270 02267 STORE TTO
035990,000186: 30,2271 57535 SLOAD DCOMP
035991,000187: 30,2272 26001 APSVEX
035992,000188: 30,2273 77702 SR2
035993,000189: 30,2274 02265 STORE VE
035994,000190: 30,2275 43414 BOFF RVQ
035995,000191: 30,2276 04747 FLAP
035996,000192: 30,2277 60300 COMMINIT
035997,000193: 30,2300 43345 COMMINIT DLOAD DAD # INITIALIZE TARGET DATA. USED BY P12, P70
035998,000194: 30,2301 25757 HINJECT # AND P71 IF IT DOES NOT FOLLOW P70.
035999,000195: 30,2302 02333 /LAND/
036000,000196: 30,2303 17631 STODL RCO
036001,000197: 30,2304 06522 HI6ZEROS
036002,000198: 30,2305 03654 STORE TXO
036003,000199: 30,2306 03633 STORE YCO
036004,000200: 30,2307 02273 STORE RDOTD
036005,000201: 30,2310 26275 STOVL YDOTD
036006,000202: 30,2311 01563 VRECTCSM
036007,000203: 30,2312 64235 VXV MXV
036008,000204: 30,2313 01555 RRECTCSM
036009,000205: 30,2314 01734 REFSMMAT
036010,000206: 30,2315 77656 UNIT
036011,000207: 30,2316 03720 STORE QAXIS
036012,000208: 30,2317 77616 RVQ
036013,000209: 30,2320 02022 P12ADRES REMADR P12TABLE
036014,000210:
036015,000211: 23,2000 SETLOC P12A
036016,000212: 23,2000 BANK
036017,000213: 23,2432 COUNT* $$/P12
036018,000214:
036019,000215: 23,2432 40220 GUIDINIT STQ SETPD
036020,000216: 23,2433 01164 TEMPR60
036021,000217: 23,2434 00001 0D
036022,000218: 23,2435 41575 VLOAD PUSH
036023,000219: 23,2436 06514 UNITZ
036024,000220: 23,2437 41434 RTB PUSH
036025,000221: 23,2440 21573 LOADTIME
036026,000222: 23,2441 77624 CALL
036027,000223: 23,2442 55716 RP-TO-R
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Page 842
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036029,000225: 23,2443 74321 MXV VXSC
036030,000226: 23,2444 01734 REFSMMAT
036031,000227: 23,2445 16027 MOONRATE
036032,000228: 23,2446 26325 STOVL WM
036033,000229: 23,2447 02023 RLS
036034,000230: 23,2450 52446 ABVAL SL3
036035,000231: 23,2451 36333 STCALL /LAND/
036036,000232: 23,2452 01164 TEMPR60
036037,000233:
036038,000234: 23,2453 00046 07374 49FPS 2DEC .149352 B-6 # EXPECTED RDOT AT TIPOVER
036039,000235: 23,2455 04145 15527 VINJNOM 2DEC 16.7924 B-7 # 5509.5 FPS(APO=30NM WITH RDOT=19.5FPS)
036040,000236: 23,2457 00007 23346 RDOTDNOM 2DEC .059436 B-7 # 19.5 FPS
036041,000237:
036042,000238:
End of include-file P12.agc. Parent file is MAIN.agc