Source Code
|
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.
|
029822,000002: ## Copyright: Public domain.
029823,000003: ## Filename: P76.agc
029824,000004: ## Purpose: A section of Luminary revision 96.
029825,000005: ## It is part of the reconstructed source code for the
029826,000006: ## original release of the flight software for the Lunar
029827,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
029828,000008: ## The code has been recreated from a previously reconstructed
029829,000009: ## copy of Luminary 97 by undoing changes described in anomaly
029830,000010: ## report LNY-59. The code has been adapted such that the
029831,000011: ## resulting bugger words exactly match those specified for
029832,000012: ## Luminary 96 in NASA drawing 2021152D, which gives relatively
029833,000013: ## high confidence that the reconstruction is correct.
029834,000014: ## Reference: pp. 709-711
029835,000015: ## Assembler: yaYUL
029836,000016: ## Contact: Ron Burkey <info@sandroid.org>.
029837,000017: ## Website: www.ibiblio.org/apollo/index.html
029838,000018: ## Mod history: 2019-08-04 MAS Created from Luminary 97.
029839,000019:
|
|
Page 709
|
029841,000021: # 1) PROGRAM NAME - TARGET DELTA V PROGRAM (P76).
029842,000022: # 2) FUNCTIONAL DESCRIPTION - UPON ENTRY BY ASTRONAUT ACTION, P76 FLASHES DSKY REQUESTS TO THE ASTRONAUT
029843,000023: # TO PROVIDE VIA DSKY (1) THE DELTA V TO BE APPLIED TO THE OTHER VEHICLE STATE VECTOR AND (2) THE
029844,000024: # TIME (TIG) AT WHICH THE OTHER VEHICLE VELOCITY WAS CHANGED BY EXECUTION OF A THRUSTING MANEUVER. THE
029845,000025: # OTHER VEHICLE STATE VECTOR IS INTEGRATED TO TIG AND UPDATED BY THE ADDITION OF DELTA V (DELTA V HAVING
029846,000026: # BEEN TRANSFORMED FROM LV TO REF COSYS). USING INTEGRVS, THE PROGRAM THEN INTEGRATES THE OTHER
029847,000027: # VEHICLE STATE VECTOR TO THE STATE VECTOR OF THIS VEHICLE, THUS INSURING THAT THE W-MATRIX AND BOTH VEHICLE
029848,000028: # STATES CORRESPOND TO THE SAME TIME.
029849,000029: # 3) ERASABLE INITIALIZATION REQUIRED - NONE.
029850,000030: # 4) CALLING SEQUENCES AND EXIT MODES - CALLED BY ASTRONAUT REQUEST THRU DSKY V 37 E 76E.
029851,000031: # EXITS BY TCF ENDOFJOB.
029852,000032: # 5) OUTPUT - OTHER VEHICLE STATE VECTOR INTEGRATED TO TIG AND INCREMENTED BY DELTA V IN REF COSYS.
029853,000033: # THE PUSHLIST CONTAINS THE MATRIX BY WHICH THE INPUT DELTA V MUST BE POST-MULTIPLIED TO CONVERT FROM LV
029854,000034: # TO REF COSYS.
029855,000035: # 6) DEBRIS - OTHER VEHICLE STATE VECTOR.
029856,000036: # 7) SUBROUTINES CALLED - BANKCALL, GOXDSPF, CSMPREC (OR LEMPREC), ATOPCSM (OR ATOPLEM), INTSTALL, INTWAKE, PHASCHNG
029857,000037: # INTPRET, INTEGRVS, AND MINIRECT.
029858,000038: # 8) FLAG USE - MOONFLAG, CMOONFLAG, INTYPFLG, RASFLAG, AND MARKCTR.
029859,000039:
029860,000040: 30,2061 BANK 30
029861,000041: 13,2000 SETLOC P76LOC
029862,000042: 13,2000 BANK
029863,000043:
029864,000044: 13,2207 COUNT* $$/P76
029865,000045:
029866,000046: 13,2207 E7,1441 EBANK= TIG
029867,000047:
029868,000048: 13,2207 05504 P76 TC UPFLAG
029869,000049: 13,2210 00031 ADRES TRACKFLG
029870,000050:
029871,000051: 13,2211 06037 TC INTPRET
029872,000052: 13,2212 77775 VLOAD
029873,000053: 13,2213 03434 DELVLVC
029874,000054: 13,2214 02223 STORE DELVOV
029875,000055: 13,2215 77776 EXIT
029876,000056:
029877,000057: 13,2216 32336 CAF V06N84 # FLASH LAST DELTA V,
029878,000058: 13,2217 04616 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
029879,000059: 13,2220 20476 CADR GOFLASH
029880,000060: 13,2221 12333 TCF ENDP76
029881,000061: 13,2222 02224 TC +2 # PROCEED
029882,000062: 13,2223 02216 TC -5 # STORE DATA AND REPEAT FLASHING
029883,000063: 13,2224 32337 CAF V06N84 +1 # FLASH VERB 06 NOUN 33, DISPLAY LAST TIG,
029884,000064: 13,2225 04616 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
029885,000065: 13,2226 20476 CADR GOFLASH
029886,000066: 13,2227 12333 TCF ENDP76
029887,000067: 13,2230 02232 TC +2
029888,000068: 13,2231 02224 TC -5
029889,000069: 13,2232 06037 TC INTPRET # RETURN TO INTERPRETIVE CODE
|
|
Page 710
|
029891,000071: 13,2233 77745 DLOAD # SET D(MPAC)=TIG IN CSEC B28
029892,000072: 13,2234 03442 TIG
029893,000073: 13,2235 34041 STCALL TDEC1 # SET TDEC1=TIG FOR ORBITAL INTEGRATION
029894,000074: 13,2236 27043 OTHPREC
029895,000075: 13,2237 53575 COMPMAT VLOAD UNIT
029896,000076: 13,2240 00001 RATT
029897,000077: 13,2241 77676 VCOMP # U(-R)
029898,000078: 13,2242 00031 STORE 24D # U(-R) TO 24D
029899,000079: 13,2243 53435 VXV UNIT # U(-R) X V = U(V X R)
029900,000080: 13,2244 00007 VATT
029901,000081: 13,2245 00023 STORE 18D
029902,000082: 13,2246 53435 VXV UNIT # U(V X R) X U(-R) = U((R X V) X R)
029903,000083: 13,2247 00031 24D
029904,000084: 13,2250 24015 STOVL 12D
029905,000085: 13,2251 02223 DELVOV
029906,000086: 13,2252 76505 VXM VSL1 # V(MPAC)=DELTA V IN REFCOSYS
029907,000087: 13,2253 00015 12D
029908,000088: 13,2254 77655 VAD
029909,000089: 13,2255 00007 VATT
029910,000090: 13,2256 00007 STORE 6 # V(PD6)=VATT + DELTA V
029911,000091: 13,2257 77624 CALL # PREVENT WOULD-BE USER OF ORBITAL
029912,000092: 13,2260 27414 INTSTALL # INTEG FROM INTERFERING WITH UPDATING
029913,000093: 13,2261 77624 CALL
029914,000094: 13,2262 26340 P76SUB1
029915,000095: 13,2263 53775 VLOAD VSR*
029916,000096: 13,2264 00007 6
029917,000097: 13,2265 57176 0,2
029918,000098: 13,2266 25543 STOVL VCV
029919,000099: 13,2267 00001 RATT
029920,000100: 13,2270 77657 VSR*
029921,000101: 13,2271 57176 0,2
029922,000102: 13,2272 15535 STODL RCV
029923,000103: 13,2273 03442 TIG
029924,000104: 13,2274 01517 STORE TET
029925,000105: 13,2275 71214 CLEAR DLOAD
029926,000106: 13,2276 01673 INTYPFLG
029927,000107: 13,2277 01643 TETTHIS
029928,000108: 13,2300 34041 INTOTHIS STCALL TDEC1
029929,000109: 13,2301 27107 INTEGRVS
029930,000110: 13,2302 77624 CALL
029931,000111: 13,2303 27414 INTSTALL
029932,000112: 13,2304 77775 VLOAD
029933,000113: 13,2305 00017 RATT1
029934,000114: 13,2306 01503 STORE RRECT
029935,000115: 13,2307 15535 STODL RCV
029936,000116: 13,2310 00015 TAT
029937,000117: 13,2311 25517 STOVL TET
029938,000118: 13,2312 00025 VATT1
029939,000119: 13,2313 77624 CALL
029940,000120: 13,2314 23455 MINIRECT
|
|
Page 711
|
029942,000122: 13,2315 77776 EXIT
029943,000123: 13,2316 05353 TC PHASCHNG
029944,000124: 13,2317 04024 OCT 04024
029945,000125:
029946,000126: 13,2320 05504 TC UPFLAG
029947,000127: 13,2321 00236 ADRES REINTFLG
029948,000128:
029949,000129: 13,2322 06037 TC INTPRET
029950,000130: 13,2323 77624 CALL
029951,000131: 13,2324 26661 ATOPOTH
029952,000132: 13,2325 77531 SSP EXIT
029953,000133: 13,2326 00053 QPRET
029954,000134: 13,2327 26332 OUT
029955,000135: 13,2330 04616 TC BANKCALL # PERMIT USE OF ORBITAL INTEGRATION
029956,000136: 13,2331 27445 CADR INTWAKE1
029957,000137: 13,2332 77776 OUT EXIT
029958,000138: 13,2333 34755 ENDP76 CAF ZERO
029959,000139: 13,2334 55462 TS MARKCTR # CLEAR RR TRACKING MARK COUNTER
029960,000140: 13,2335 16001 TCF GOTOPOOH
029961,000141:
029962,000142: 13,2336 01524 V06N84 NV 0684
029963,000143: 13,2337 01441 NV 0633
029964,000144: 13,2340 43174 P76SUB1 AXT,2 SET
029965,000145: 13,2341 00002 2
029966,000146: 13,2342 00063 MOONFLAG # SET MEANS MOON IS SPHERE OF INFLUENCE.
029967,000147: 13,2343 77014 BON AXT,2
029968,000148: 13,2344 04303 CMOONFLG # SET MEANS PERM CM STATE IN LUNAR SPHERE.
029969,000149: 13,2345 00052 QPRET
029970,000150: 13,2346 00000 0
029971,000151: 13,2347 43414 CLEAR RVQ
029972,000152: 13,2350 00263 MOONFLAG
029973,000153:
029974,000154:
029975,000155:
End of include-file P76.agc. Parent file is MAIN.agc