GAP: ASSEMBLE REVISION 001 OF AGC PROGRAM LMY99 BY NASA 2021112-061 16:27 JULY 14,1969Note 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 were from the printout at the MIT Museum, with many thanks
to Deborah Douglas, the Museum's Curator of Science and Technology, for releasing
it to us. The printout was digitally photographed by Paul Fjeld. A team of
volunteers transcribed the source code manually from these images or, where
appropriate, modified already-transcribed but similar source Luminary 131 (Apollo 13)
source code to agree with the images from the printout. Note that the page images
presented online are of reduced quality, and that higher-quality images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 001 OF AGC PROGRAM LMY99 BY NASA 2021112-061 16:27 JULY 14,1969Note that the date is the date of the printout, not the date of the program revision. |
030448,000002: ## Copyright: Public domain.
030449,000003: ## Filename: P76.agc
030450,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
030451,000005: ## It is part of the source code for the Lunar Module's (LM)
030452,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
030453,000007: ## Assembler: yaYUL
030454,000008: ## Contact: Ron Burkey <info@sandroid.org>.
030455,000009: ## Website: www.ibiblio.org/apollo.
030456,000010: ## Pages: 709-711
030457,000011: ## Mod history: 2009-05-19 RSB Adapted from the corresponding
030458,000012: ## Luminary131 file, using page
030459,000013: ## images from Luminary 1A.
030460,000014: ## 2016-12-13 RSB GOTOP00H -> GOTOPOOH
030461,000015: ## 2016-12-14 RSB Proofed text comments with octopus/ProoferComments
030462,000016: ## and corrected the errors found.
030463,000017: ##
030464,000018: ## This source code has been transcribed or otherwise adapted from
030465,000019: ## digitized images of a hardcopy from the MIT Museum. The digitization
030466,000020: ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
030467,000021: ## the Museum. Many thanks to both. The images (with suitable reduction
030468,000022: ## in storage size and consequent reduction in image quality as well) are
030469,000023: ## available online at www.ibiblio.org/apollo. If for some reason you
030470,000024: ## find that the images are illegible, contact me at info@sandroid.org
030471,000025: ## about getting access to the (much) higher-quality images which Paul
030472,000026: ## actually created.
030473,000027: ##
030474,000028: ## Notations on the hardcopy document read, in part:
030475,000029: ##
030476,000030: ## Assemble revision 001 of AGC program LMY99 by NASA 2021112-61
030477,000031: ## 16:27 JULY 14, 1969
030478,000032:
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Page 709 |
030480,000034: # 1) PROGRAM NAME - TARGET DELTA V PROGRAM (P76).
030481,000035: # 2) FUNCTIONAL DESCRIPTION - UPON ENTRY BY ASTRONAUT ACTION, P76 FLASHES DSKY REQUESTS TO THE ASTRONAUT
030482,000036: # TO PROVIDE VIA DSKY (1) THE DELTA V TO BE APPLIED TO THE OTHER VEHICLE STATE VECTOR AND (2) THE
030483,000037: # TIME (TIG) AT WHICH THE OTHER VEHICLE VELOCITY WAS CHANGED BY EXECUTION OF A THRUSTING MANEUVER. THE
030484,000038: # OTHER VEHICLE STATE VECTOR IS INTEGRATED TO TIG AND UPDATED BY THE ADDITION OF DELTA V (DELTA V HAVING
030485,000039: # BEEN TRANSFORMED FROM LV TO REF COSYS). USING INTEGRVS, THE PROGRAM THEN INTEGRATES THE OTHER
030486,000040: # VEHICLE STATE VECTOR TO THE STATE VECTOR OF THIS VEHICLE, THUS INSURING THAT THE W-MATRIX AND BOTH VEHICLE
030487,000041: # STATES CORRESPOND TO THE SAME TIME.
030488,000042: # 3) ERASABLE INITIALIZATION REQUIRED - NONE.
030489,000043: # 4) CALLING SEQUENCES AND EXIT MODES - CALLED BY ASTRONAUT REQUEST THRU DSKY V 37 E 76E.
030490,000044: # EXITS BY TCF ENDOFJOB.
030491,000045: # 5) OUTPUT - OTHER VEHICLE STATE VECTOR INTEGRATED TO TIG AND INCREMENTED BY DELTA V IN REF COSYS.
030492,000046: # THE PUSHLIST CONTAINS THE MATRIX BY WHICH THE INPUT DELTA V MUST BE POST-MULTIPLIED TO CONVERT FROM LV
030493,000047: # TO REF COSYS.
030494,000048: # 6) DEBRIS - OTHER VEHICLE STATE VECTOR.
030495,000049: # 7) SUBROUTINES CALLED - BANKCALL, GOXDSPF, CSMPREC (OR LEMPREC), ATOPCSM (OR ATOPLEM), INTSTALL, INTWAKE, PHASCHNG
030496,000050: # INTPRET, INTEGRVS, AND MINIRECT.
030497,000051: # 8) FLAG USE - MOONFLAG, CMOONFLAG, INTYPFLG, RASFLAG, AND MARKCTR.
030498,000052:
030499,000053: 30,2061 BANK 30
030500,000054: 13,2000 SETLOC P76LOC
030501,000055: 13,2000 BANK
030502,000056:
030503,000057: 13,2207 COUNT* $$/P76
030504,000058:
030505,000059: 13,2207 E7,1441 EBANK= TIG
030506,000060:
030507,000061: 13,2207 05504 P76 TC UPFLAG
030508,000062: 13,2210 00031 ADRES TRACKFLG
030509,000063:
030510,000064: 13,2211 06037 TC INTPRET
030511,000065: 13,2212 77775 VLOAD
030512,000066: 13,2213 03434 DELVLVC
030513,000067: 13,2214 02223 STORE DELVOV
030514,000068: 13,2215 77776 EXIT
030515,000069:
030516,000070: 13,2216 32336 CAF V06N84 # FLASH LAST DELTA V,
030517,000071: 13,2217 04616 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
030518,000072: 13,2220 20476 CADR GOFLASH
030519,000073: 13,2221 12333 TCF ENDP76
030520,000074: 13,2222 02224 TC +2 # PROCEED
030521,000075: 13,2223 02216 TC -5 # STORE DATA AND REPEAT FLASHING
030522,000076: 13,2224 32337 CAF V06N84 +1 # FLASH VERB 06 NOUN 33, DISPLAY LAST TIG,
030523,000077: 13,2225 04616 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
030524,000078: 13,2226 20476 CADR GOFLASH
030525,000079: 13,2227 12333 TCF ENDP76
030526,000080: 13,2230 02232 TC +2
030527,000081: 13,2231 02224 TC -5
030528,000082: 13,2232 06037 TC INTPRET # RETURN TO INTERPRETIVE CODE
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Page 710 |
030530,000084: 13,2233 77745 DLOAD # SET D(MPAC)=TIG IN CSEC B28
030531,000085: 13,2234 03442 TIG
030532,000086: 13,2235 34041 STCALL TDEC1 # SET TDEC1=TIG FOR ORBITAL INTEGRATION
030533,000087: 13,2236 27043 OTHPREC
030534,000088: 13,2237 53575 COMPMAT VLOAD UNIT
030535,000089: 13,2240 00001 RATT
030536,000090: 13,2241 77676 VCOMP # U(-R)
030537,000091: 13,2242 00031 STORE 24D # U(-R) TO 24D
030538,000092: 13,2243 53435 VXV UNIT # U(-R) X V = U(V X R)
030539,000093: 13,2244 00007 VATT
030540,000094: 13,2245 00023 STORE 18D
030541,000095: 13,2246 53435 VXV UNIT # U(V X R) X U(-R) = U((R X V) X R)
030542,000096: 13,2247 00031 24D
030543,000097: 13,2250 24015 STOVL 12D
030544,000098: 13,2251 02223 DELVOV
030545,000099: 13,2252 76505 VXM VSL1 # V(MPAC)=DELTA V IN REFCOSYS
030546,000100: 13,2253 00015 12D
030547,000101: 13,2254 77655 VAD
030548,000102: 13,2255 00007 VATT
030549,000103: 13,2256 00007 STORE 6 # V(PD6)=VATT + DELTA V
030550,000104: 13,2257 77624 CALL # PREVENT WOULD-BE USER OF ORBITAL
030551,000105: 13,2260 27414 INTSTALL # INTEG FROM INTERFERING WITH UPDATING
030552,000106: 13,2261 77624 CALL
030553,000107: 13,2262 26340 P76SUB1
030554,000108: 13,2263 53775 VLOAD VSR*
030555,000109: 13,2264 00007 6
030556,000110: 13,2265 57176 0,2
030557,000111: 13,2266 25543 STOVL VCV
030558,000112: 13,2267 00001 RATT
030559,000113: 13,2270 77657 VSR*
030560,000114: 13,2271 57176 0,2
030561,000115: 13,2272 15535 STODL RCV
030562,000116: 13,2273 03442 TIG
030563,000117: 13,2274 01517 STORE TET
030564,000118: 13,2275 71214 CLEAR DLOAD
030565,000119: 13,2276 01673 INTYPFLG
030566,000120: 13,2277 01643 TETTHIS
030567,000121: 13,2300 34041 INTOTHIS STCALL TDEC1
030568,000122: 13,2301 27107 INTEGRVS
030569,000123: 13,2302 77624 CALL
030570,000124: 13,2303 27414 INTSTALL
030571,000125: 13,2304 77775 VLOAD
030572,000126: 13,2305 00017 RATT1
030573,000127: 13,2306 01503 STORE RRECT
030574,000128: 13,2307 15535 STODL RCV
030575,000129: 13,2310 00015 TAT
030576,000130: 13,2311 25517 STOVL TET
030577,000131: 13,2312 00025 VATT1
030578,000132: 13,2313 77624 CALL
030579,000133: 13,2314 23455 MINIRECT
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Page 711 |
030581,000135: 13,2315 77776 EXIT
030582,000136: 13,2316 05353 TC PHASCHNG
030583,000137: 13,2317 04024 OCT 04024
030584,000138:
030585,000139: 13,2320 05504 TC UPFLAG
030586,000140: 13,2321 00236 ADRES REINTFLG
030587,000141:
030588,000142: 13,2322 06037 TC INTPRET
030589,000143: 13,2323 77624 CALL
030590,000144: 13,2324 26661 ATOPOTH
030591,000145: 13,2325 77531 SSP EXIT
030592,000146: 13,2326 00053 QPRET
030593,000147: 13,2327 26332 OUT
030594,000148: 13,2330 04616 TC BANKCALL # PERMIT USE OF ORBITAL INTEGRATION
030595,000149: 13,2331 27445 CADR INTWAKE1
030596,000150: 13,2332 77776 OUT EXIT
030597,000151: 13,2333 34755 ENDP76 CAF ZERO
030598,000152: 13,2334 55462 TS MARKCTR # CLEAR RR TRACKING MARK COUNTER
030599,000153: 13,2335 16001 TCF GOTOPOOH
030600,000154:
030601,000155: 13,2336 01524 V06N84 NV 0684
030602,000156: 13,2337 01441 NV 0633
030603,000157: 13,2340 43174 P76SUB1 AXT,2 SET
030604,000158: 13,2341 00002 2
030605,000159: 13,2342 00063 MOONFLAG # SET MEANS MOON IS SPHERE OF INFLUENCE.
030606,000160: 13,2343 77014 BON AXT,2
030607,000161: 13,2344 04303 CMOONFLG # SET MEANS PERM CM STATE IN LUNAR SPHERE.
030608,000162: 13,2345 00052 QPRET
030609,000163: 13,2346 00000 0
030610,000164: 13,2347 43414 CLEAR RVQ
030611,000165: 13,2350 00263 MOONFLAG
030612,000166:
030613,000167:
030614,000168:
End of include-file P76.agc. Parent file is MAIN.agc