Notations on the program listing read, in part:
GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision.
Source Code
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These source-code files derive from a printout of Luminary 116 (the Apollo 12
Lunar Module guidance computer program), from the personal library of
original AGC developer Don Eyles, digitally photographed at archive.org,
financially sponsored by Ron Burkey, and transcribed to source code by a
team of volunteers. This colorized, syntax-highlighted form was created
by assembling that transcribed source code. Note that the full page images
are available on the
Virtual AGC project page at archive.org, while reduced-size images
are presented at the VirtualAGC project website. Report or fix any
transcription errors at
the Virtual AGC project code repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision. |
035813,000002: ## Copyright: Public domain.
035814,000003: ## Filename: P12.agc
035815,000004: ## Purpose: A section of Luminary revision 116.
035816,000005: ## It is part of the source code for the Lunar Module's (LM)
035817,000006: ## Apollo Guidance Computer (AGC) for Apollo 12.
035818,000007: ## This file is intended to be a faithful transcription, except
035819,000008: ## that the code format has been changed to conform to the
035820,000009: ## requirements of the yaYUL assembler rather than the
035821,000010: ## original YUL assembler.
035822,000011: ## Reference: pp. 831-835
035823,000012: ## Assembler: yaYUL
035824,000013: ## Contact: Ron Burkey <info@sandroid.org>.
035825,000014: ## Website: www.ibiblio.org/apollo/index.html
035826,000015: ## Mod history: 2017-01-22 MAS Created from Luminary 99.
035827,000016: ## 2017-01-28 RSB Proofed comment text using octopus/prooferComments
035828,000017: ## and fixed errors found.
035829,000018: ## 2017-03-09 HG Transcribed
035830,000019: ## 2017-03-13 RSB Proofed comment text via 3-way diff vs
035831,000020: ## Luminary 99 and 131.
035832,000021: ## 2017-08-26 MAS Fixed a comment-text error found while transcribing
035833,000022: ## Zerlina 56.
035834,000023:
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Page 831 |
035836,000025: 24,3677 BANK 24
035837,000026: 30,2000 SETLOC P12
035838,000027: 30,2000 BANK
035839,000028:
035840,000029: 30,2061 E7,1515 EBANK= DVCNTR
035841,000030: 30,2061 COUNT* $$/P12
035842,000031:
035843,000032: 30,2061 05353 P12LM TC PHASCHNG
035844,000033: 30,2062 04024 OCT 04024
035845,000034:
035846,000035: 30,2063 04616 TC BANKCALL
035847,000036: 30,2064 11236 CADR R02BOTH # CHECK THE STATUS OF THE IMU.
035848,000037:
035849,000038: 30,2065 06011 TC CLRADMOD # INITIALIZE RADMODES FOR R29.
035850,000039:
035851,000040: 30,2066 36000 CAF THRESH2 # INITIALIZE DVMON
035852,000041: 30,2067 55250 TS DVTHRUSH
035853,000042: 30,2070 34751 CAF FOUR
035854,000043: 30,2071 55515 TS DVCNTR
035855,000044:
035856,000045: 30,2072 34755 CA ZERO
035857,000046: 30,2073 55462 TS TRKMKCNT # SHOW THAT R29 DOWNLINK DATA IS NOT READY
035858,000047:
035859,000048: 30,2074 33022 CAF V06N33A
035860,000049: 30,2075 04616 TC BANKCALL # FLASH TIG
035861,000050: 30,2076 20477 CADR GOFLASH
035862,000051: 30,2077 16001 TCF GOTOPOOH
035863,000052: 30,2100 12102 TCF +2 # PROCEED
035864,000053: 30,2101 12074 TCF -5 # ENTER
035865,000054:
035866,000055: 30,2102 05353 TC PHASCHNG
035867,000056: 30,2103 04024 OCT 04024
035868,000057:
035869,000058: 30,2104 06042 TC INTPRET
035870,000059: 30,2105 43014 SET SET
035871,000060: 30,2106 03067 MUNFLAG
035872,000061: 30,2107 06464 ACC4-2FL
035873,000062: 30,2110 43014 SET CLEAR
035874,000063: 30,2111 00075 R10FLAG
035875,000064: 30,2112 00270 RNDVZFLG
035876,000065: 30,2113 43014 SET SET
035877,000066: 30,2114 04464 FLPI
035878,000067: 30,2115 04461 FLVR
035879,000068: 30,2116 77624 CALL # INITIALIZE WM AND /LAND/
035880,000069: 30,2117 71343 GUIDINIT
035881,000070: 30,2120 77624 CALL
035882,000071: 30,2121 60251 P12INIT
035883,000072: 30,2122 77745 P12LMB DLOAD
035884,000073: 30,2123 25753 (TGO)A # SET TGO TO AN INITIAL NOMINAL VALUE.
035885,000074: 30,2124 17517 STODL TGO
035886,000075:
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Page 832 |
035888,000077: 30,2125 03442 TIG
035889,000078: 30,2126 34041 STCALL TDEC1
035890,000079: 30,2127 27060 LEMPREC # ROTATE THE STATE VECTORS TO THE
035891,000080: 30,2130 64375 VLOAD MXV # IGNITION TIME.
035892,000081: 30,2131 00007 VATT
035893,000082: 30,2132 01734 REFSMMAT
035894,000083: 30,2133 77772 VSL1
035895,000084: 30,2134 27601 STOVL V1S # COMPUTE V1S = VEL(TIG)*2(-7) M/CS.
035896,000085: 30,2135 00001 RATT
035897,000086: 30,2136 52521 MXV VSL6
035898,000087: 30,2137 01734 REFSMMAT
035899,000088: 30,2140 37521 STCALL R # COMPUTE R = POS(TIG)*2(-24)M.
035900,000089: 30,2141 67067 MUNGRAV # COMPUTE GDT1/2(TIG)*2(-7)M/CS.
035901,000090: 30,2142 53575 VLOAD UNIT
035902,000091: 30,2143 03521 R
035903,000092: 30,2144 37537 STCALL UNIT/R/ # COMPUTE UNIT/R/ FOR YCOMP.
035904,000093: 30,2145 57312 YCOMP
035905,000094: 30,2146 57461 SR DCOMP
035906,000095: 30,2147 20606 5D
035907,000096: 30,2150 17643 STODL XRANGE # INITIALIZE XRANGE FOR NOUN 76.
035908,000097: 30,2151 31367 VINJNOM
035909,000098: 30,2152 16277 STODL ZDOTD
035910,000099: 30,2153 31371 RDOTDNOM
035911,000100: 30,2154 02273 STORE RDOTD
035912,000101: 30,2155 77776 EXIT
035913,000102:
035914,000103: 30,2156 05353 TC PHASCHNG
035915,000104: 30,2157 04024 OCT 04024
035916,000105:
035917,000106: 30,2160 33021 NEWLOAD CAF V06N76 # FLASH CROSS-RANGE AND APOLUNE VALUES.
035918,000107: 30,2161 04616 TC BANKCALL
035919,000108: 30,2162 20477 CADR GOFLASH
035920,000109: 30,2163 16001 TCF GOTOPOOH
035921,000110: 30,2164 12166 TCF +2 # PROCEED
035922,000111: 30,2165 12160 TCF NEWLOAD # ENTER NEW DATA.
035923,000112:
035924,000113: 30,2166 32314 CAF P12ADRES
035925,000114: 30,2167 55455 TS WHICH
035926,000115:
035927,000116: 30,2170 05353 TC PHASCHNG
035928,000117: 30,2171 04024 OCT 04024
035929,000118:
035930,000119: 30,2172 06042 TC INTPRET
035931,000120: 30,2173 54345 DLOAD SL
035932,000121: 30,2174 03643 XRANGE
035933,000122: 30,2175 20206 5D
035934,000123: 30,2176 77615 DAD
035935,000124: 30,2177 02335 Y
035936,000125: 30,2200 27633 STOVL YCO
035937,000126: 30,2201 03537 UNIT/R/
035938,000127:
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Page 833 |
035940,000129: 30,2202 53361 VXSC VAD
035941,000130: 30,2203 31365 49FPS
035942,000131: 30,2204 03601 V1S
035943,000132: 30,2205 03527 STORE V # V(TIPOVER) = V(IGN) + 57FPS (UNIT/R/)
035944,000133: 30,2206 72441 DOT SL1
035945,000134: 30,2207 03537 UNIT/R/
035946,000135: 30,2210 27474 STOVL RDOT # RDOT * 2(-7)
035947,000136: 30,2211 03537 UNIT/R/
035948,000137: 30,2212 53435 VXV UNIT
035949,000138: 30,2213 03720 QAXIS
035950,000139: 30,2214 37726 STCALL ZAXIS1
035951,000140: 30,2215 60315 ASCENT
035952,000141: 30,2216 77745 P12RET DLOAD
035953,000142: 30,2217 02361 ATP # ATP(2)*2(18)
035954,000143: 30,2220 65316 DSQ PDDL
035955,000144: 30,2221 02355 ATY # ATY(2)*2(18)
035956,000145: 30,2222 43316 DSQ DAD
035957,000146: 30,2223 75454 BZE SQRT
035958,000147: 30,2224 60230 YAWDUN
035959,000148: 30,2225 55352 SL1 BDDV
035960,000149: 30,2226 02355 ATY
035961,000150: 30,2227 77736 ARCSIN
035962,000151: 30,2230 26363 YAWDUN STOVL YAW
035963,000152: 30,2231 03254 UNFC/2
035964,000153: 30,2232 50256 UNIT DOT
035965,000154: 30,2233 03537 UNIT/R/
035966,000155: 30,2234 65552 SL1 ARCCOS
035967,000156: 30,2235 77676 DCOMP
035968,000157: 30,2236 02365 STORE PITCH
035969,000158: 30,2237 77776 EXIT
035970,000159: 30,2240 05353 TC PHASCHNG
035971,000160: 30,2241 04024 OCT 04024
035972,000161:
035973,000162: 30,2242 00004 INHINT
035974,000163: 30,2243 04674 TC IBNKCALL
035975,000164: 30,2244 40143 CADR PFLITEDB
035976,000165: 30,2245 05516 TC DOWNFLAG
035977,000166: 30,2246 00213 ADRES FLPI
035978,000167:
035979,000168: 30,2247 04635 TC POSTJUMP
035980,000169: 30,2250 74130 CADR BURNBABY
035981,000170:
035982,000171: 30,2251 77745 P12INIT DLOAD # INITIALIZE ENGINE DATA. USED FOR P12 AND
035983,000172: 30,2252 16013 (1/DV)A # P71.
035984,000173: 30,2253 03641 STORE 1/DV3
035985,000174: 30,2254 03637 STORE 1/DV2
035986,000175: 30,2255 17635 STODL 1/DV1
035987,000176: 30,2256 16017 (AT)A
035988,000177: 30,2257 16263 STODL AT
035989,000178: 30,2260 16021 (TBUP)A
035990,000179:
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Page 834 |
035992,000181: 30,2261 16271 STODL TBUP
035993,000182: 30,2262 34013 ATDECAY
035994,000183: 30,2263 54276 DCOMP SL
035995,000184: 30,2264 20214 11D
035996,000185: 30,2265 02267 STORE TTO
035997,000186: 30,2266 57535 SLOAD DCOMP
035998,000187: 30,2267 26001 APSVEX
035999,000188: 30,2270 77702 SR2
036000,000189: 30,2271 02265 STORE VE
036001,000190: 30,2272 43414 BOFF RVQ
036002,000191: 30,2273 04747 FLAP
036003,000192: 30,2274 60275 COMMINIT
036004,000193: 30,2275 43345 COMMINIT DLOAD DAD # INITIALIZE TARGET DATA. USED BY P12, P70
036005,000194: 30,2276 25751 HINJECT # AND P71 IF IT DOES NOT FOLLOW P70.
036006,000195: 30,2277 02333 /LAND/
036007,000196: 30,2300 17631 STODL RCO
036008,000197: 30,2301 06524 HI6ZEROS
036009,000198: 30,2302 03654 STORE TXO
036010,000199: 30,2303 03633 STORE YCO
036011,000200: 30,2304 26275 STOVL YDOTD
036012,000201: 30,2305 01563 VRECTCSM
036013,000202: 30,2306 64235 VXV MXV
036014,000203: 30,2307 01555 RRECTCSM
036015,000204: 30,2310 01734 REFSMMAT
036016,000205: 30,2311 77656 UNIT
036017,000206: 30,2312 03720 STORE QAXIS
036018,000207: 30,2313 77616 RVQ
036019,000208:
036020,000209: 30,2314 02024 P12ADRES REMADR P12TABLE
036021,000210:
036022,000211: 34,2000 SETLOC ASENT8
036023,000212: 34,2000 BANK
036024,000213: 34,3343 COUNT* $$/P12
036025,000214:
036026,000215: 34,3343 40220 GUIDINIT STQ SETPD
036027,000216: 34,3344 01163 TEMPR60
036028,000217: 34,3345 00001 0D
036029,000218: 34,3346 41575 VLOAD PUSH
036030,000219: 34,3347 06516 UNITZ
036031,000220: 34,3350 41434 RTB PUSH
036032,000221: 34,3351 21574 LOADTIME
036033,000222: 34,3352 77624 CALL
036034,000223: 34,3353 55716 RP-TO-R
036035,000224: 34,3354 74321 MXV VXSC
036036,000225: 34,3355 01734 REFSMMAT
036037,000226: 34,3356 16027 MOONRATE
036038,000227: 34,3357 26325 STOVL WM
036039,000228: 34,3360 02023 RLS
036040,000229: 34,3361 52446 ABVAL SL3
036041,000230: 34,3362 36333 STCALL /LAND/
036042,000231:
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Page 835 |
036044,000233: 34,3363 01163 TEMPR60
036045,000234:
036046,000235: 34,3364 00046 07374 49FPS 2DEC .149352 B-6 # EXPECTED RDOT AT TIPOVER
036047,000236: 34,3366 04145 15527 VINJNOM 2DEC 16.7924 B-7 # 5509.5 FPS(APO=30NM WITH RDOT=19.5FPS)
036048,000237: 34,3370 00007 23346 RDOTDNOM 2DEC .059436 B-7 # 19.5 FPS
036049,000238:
036050,000239:
End of include-file P12.agc. Parent file is MAIN.agc