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. |
026408,000002: ## Copyright: Public domain.
026409,000003: ## Filename: P30_P37.agc
026410,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
026411,000005: ## It is part of the source code for the Lunar Module's (LM)
026412,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
026413,000007: ## Assembler: yaYUL
026414,000008: ## Contact: Ron Burkey <info@sandroid.org>.
026415,000009: ## Website: www.ibiblio.org/apollo.
026416,000010: ## Pages: 614-617
026417,000011: ## Mod history: 2009-05-17 RSB Adapted from the corresponding
026418,000012: ## Luminary131 file, using page
026419,000013: ## images from Luminary 1A.
026420,000014: ## 2009-06-05 RSB Removed 4 lines of code that shouldn't
026421,000015: ## have survived from Luminary 131.
026422,000016: ## 2016-12-13 RSB GOTOP00H -> GOTOPOOH
026423,000017: ## 2016-12-14 RSB VNP00H -> VNPOOH.
026424,000018: ## 2016-12-14 RSB Proofed text comments with octopus/ProoferComments
026425,000019: ## and corrected the errors found.
026426,000020: ##
026427,000021: ## This source code has been transcribed or otherwise adapted from
026428,000022: ## digitized images of a hardcopy from the MIT Museum. The digitization
026429,000023: ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
026430,000024: ## the Museum. Many thanks to both. The images (with suitable reduction
026431,000025: ## in storage size and consequent reduction in image quality as well) are
026432,000026: ## available online at www.ibiblio.org/apollo. If for some reason you
026433,000027: ## find that the images are illegible, contact me at info@sandroid.org
026434,000028: ## about getting access to the (much) higher-quality images which Paul
026435,000029: ## actually created.
026436,000030: ##
026437,000031: ## Notations on the hardcopy document read, in part:
026438,000032: ##
026439,000033: ## Assemble revision 001 of AGC program LMY99 by NASA 2021112-61
026440,000034: ## 16:27 JULY 14, 1969
026441,000035:
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Page 614 |
026443,000037: # PROGRAM DESCRIPTION P30 DATE 3-6-67
026444,000038:
026445,000039: # MOD.1 BY RAMA AIYAWAR
026446,000040:
026447,000041: # FUNCTIONAL DESCRIPTION
026448,000042: # ACCEPT ASTRONAUT INPUTS OF TIG,DELV(LV)
026449,000043: # CALL IMU STATUS CHECK ROUTINE (R02)
026450,000044: # DISPLAY TIME TO GO, APOGEE, PERIGEE, DELV(MAG), MGA AT IGN
026451,000045: # REQUEST BURN PROGRAM
026452,000046:
026453,000047: # CALLING SEQUENCE VIA JOB FROM V37
026454,000048:
026455,000049: # EXIT VIA V37 CALL OR TO GOTOPOOH (V34E)
026456,000050:
026457,000051: # SUBROUTINE CALLS - FLAGUP, PHASCHNG, BANKCALL, ENDOFJOB, GOFLASH, GOFLASHR
026458,000052: # GOPERF3R, INTPRET, BLANKET, GOTOPOOH, R02BOTH, S30.1,
026459,000053: # TTG/N35, MIDGIM, DISPMGA
026460,000054:
026461,000055: # ERASABLE INITIALIZATION - STATE VECTOR
026462,000056:
026463,000057: # OUTPUT - RINIT, VINIT, +MGA, VTIG, RTIG, DELVSIN, DELVSAB, DELVSLV, HAPO,
026464,000058: # HPER, TTOGO
026465,000059:
026466,000060: # DEBRIS - A, L, MPAC, PUSHLIST
026467,000061:
026468,000062: 32,2776 BANK 32
026469,000063: 35,2000 SETLOC P30S
026470,000064: 35,2000 BANK
026471,000065: 35,2000 E4,1652 EBANK= +MGA
026472,000066: 35,2000 COUNT* $$/P30
026473,000067: 35,2000 05504 P30 TC UPFLAG # SET UPDATE FLAG
026474,000068: 35,2001 00027 ADRES UPDATFLG
026475,000069: 35,2002 05504 TC UPFLAG # SET TRACK FLAG
026476,000070: 35,2003 00031 ADRES TRACKFLG
026477,000071:
026478,000072: 35,2004 32025 P30N33 CAF V06N33 # T OF IGN
026479,000073: 35,2005 03712 TC VNPOOH # RETURNS ON PROCEED, POOH ON TERMINATE
026480,000074:
026481,000075: 35,2006 33727 CAF V06N81 # DISPLAY DELTA V (LV)
026482,000076: 35,2007 03712 TC VNPOOH # REDISPLAY ON RECYCLE
026483,000077:
026484,000078: 35,2010 05516 TC DOWNFLAG # RESET UPDATE FLAG
026485,000079: 35,2011 00027 ADRES UPDATFLG
026486,000080: 35,2012 06037 TC INTPRET
026487,000081: 35,2013 77624 CALL
026488,000082: 35,2014 70000 S30.1
026489,000083: 35,2015 77414 SET EXIT
026490,000084: 35,2016 00470 UPDATFLG
026491,000085: 35,2017 32026 PARAM30 CAF V06N42 # DISPLAY APOGEE,PERIGEE,DELTA V
026492,000086: 35,2020 03712 TC VNPOOH
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Page 615 |
026494,000088:
026495,000089: 35,2021 06037 TC INTPRET
026496,000090: 35,2022 77614 SETGO
026497,000091: 35,2023 01027 XDELVFLG # FOR P40'S: EXTERNAL DELTA-V GUIDANCE.
026498,000092: 35,2024 72540 REVN1645 # TRKMKCNT, TGO, +MGA DISPLAY
026499,000093:
026500,000094: 35,2025 01441 V06N33 VN 0633
026501,000095: 35,2026 01452 V06N42 VN 0642
026502,000096:
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Page 616 |
026504,000098: # PROGRAM DESCRIPTION S30.1 DATE 9NOV66
026505,000099: # MOD NO 1 LOG SECTION P30,P37
026506,000100: # MOD BY RAMA AIYAWAR **
026507,000101:
026508,000102: # FUNCTIONAL DESCRIPTION
026509,000103: # BASED ON STORED TARGET PARAMETERS (R OF IGNITION (RTIG), V OF
026510,000104: # IGNITION (VTIG), TIME OF IGNITION (TIG)), COMPUTE PERIGEE ALTITUDE
026511,000105: # APOGEE ALTITUDE AND DELTAV REQUIRED (DELVSIN).
026512,000106:
026513,000107: # CALLING SEQUENCE
026514,000108: # L CALL
026515,000109: # L+1 S30.1
026516,000110:
026517,000111: # NORMAL EXIT MODE
026518,000112: # AT L+2 OR CALLING SEQUENCE (GOTO L+2)
026519,000113:
026520,000114: # SUBROUTINES CALLED
026521,000115: # LEMPREC
026522,000116: # PERIAPO
026523,000117:
026524,000118: # ALARM OR ABORT EXIT MODES
026525,000119: # NONE
026526,000120:
026527,000121: # ERASABLE INITIALIZATION REQUIRED
026528,000122: # TIG TIME OF IGNITION DP B28CS
026529,000123: # DELVSLV SPECIFIED DELTA-V IN LOCAL VERT.
026530,000124: # COORDS. OF ACTIVE VEHICLE AT
026531,000125: # TIME OF IGNITION VECTOR B+7 METERS/CS
026532,000126:
026533,000127: # OUTPUT
026534,000128: # RTIG POSITION AT TIG VECTOR B+29 METERS
026535,000129: # VTIG VELOCITY AT TIG VECTOR B+29 METERS/CS
026536,000130: # PDL 4D APOGEE ALTITUDE DP B+29 M, B+27 METERS.
026537,000131: # HAPO APOGEE ALTITUDE DP B+29 METERS
026538,000132: # PDL 8D PERIGEE ALTITUDE DP B+29 M, B+27 METERS.
026539,000133: # HPER PERIGEE ALTITUDE DP B+29 METERS
026540,000134: # DELVSIN SPECIFIED DELTA-V IN INERTIAL
026541,000135: # COORD. OF ACTIVE VEHICLE AT
026542,000136: # TIME OF IGNITION VECTOR B+7 METERS/CS
026543,000137: # DELVSAB MAG. OF DELVSIN VECTOR B+7 METERS/CS
026544,000138:
026545,000139: # DEBRIS QTEMP TEMP.ERASABLE
026546,000140: # QPRET, MPAC
026547,000141: # PUSHLIST
026548,000142:
026549,000143: 34,2000 SETLOC P30S1
026550,000144: 34,2000 BANK
026551,000145:
026552,000146: 34,2000 COUNT* $$/S30S
026553,000147:
026554,000148: 34,2000 71220 S30.1 STQ DLOAD
026555,000149: 34,2001 03632 QTEMP
026556,000150: 34,2002 03442 TIG # TIME IGNITION SCALED AT 2(+28)CS
026557,000151: 34,2003 34041 STCALL TDEC1
026558,000152: 34,2004 27057 LEMPREC # ENCKE ROUTINE FOR LEM
026559,000153:
026560,000154: 34,2005 67175 VLOAD SXA,2
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Page 617 |
026562,000156: 34,2006 00001 RATT
026563,000157: 34,2007 02777 RTX2
026564,000158: 34,2010 03642 STORE RTIG # RADIUS VECTOR AT IGNITION TIME
026565,000159: 34,2011 57456 UNIT VCOMP
026566,000160: 34,2012 27656 STOVL DELVSIN # ZRF/LV IN DELVSIN SCALED AT 2
026567,000161: 34,2013 00007 VATT # VELOCITY VECTOR AT TIG, SCALED 2(7) M/CS
026568,000162: 34,2014 03650 STORE VTIG
026569,000163: 34,2015 53435 VXV UNIT
026570,000164: 34,2016 03642 RTIG
026571,000165: 34,2017 66001 SETPD SXA,1
026572,000166: 34,2020 00001 0
026573,000167: 34,2021 02776 RTX1
026574,000168: 34,2022 47206 PUSH VXV # YRF/LV PDL 0 SCALED AT 2
026575,000169: 34,2023 03656 DELVSIN
026576,000170: 34,2024 63372 VSL1 PDVL
026577,000171: 34,2025 63315 PDVL PDVL # YRF/LV PDL 6 SCALED AT 2
026578,000172: 34,2026 03656 DELVSIN # ZRF/LV PDL 12D SCALED AT 2
026579,000173: 34,2027 03434 DELVSLV
026580,000174: 34,2030 76505 VXM VSL1
026581,000175: 34,2031 00001 0
026582,000176: 34,2032 03656 STORE DELVSIN # DELTAV IN INERT. COOR. SCALED TO B+7M/CS
026583,000177: 34,2033 77646 ABVAL
026584,000178: 34,2034 27664 STOVL DELVSAB # DELTA V MAG.
026585,000179: 34,2035 03642 RTIG # (FOR PERIAPO)
026586,000180: 34,2036 53315 PDVL VAD # VREQUIRED = VTIG + DELVSIN (FOR PERIAPO)
026587,000181: 34,2037 03650 VTIG
026588,000182: 34,2040 03656 DELVSIN
026589,000183: 34,2041 77624 CALL
026590,000184: 34,2042 46316 PERIAPO1
026591,000185: 34,2043 77624 CALL
026592,000186: 34,2044 46426 SHIFTR1 # RESCALE IF NEEDED
026593,000187: 34,2045 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026594,000188: 34,2046 45636 MAXCHK
026595,000189: 34,2047 16321 STODL HPER # PERIGEE ALT 2(29) METERS, FOR DISPLAY
026596,000190: 34,2050 00005 4D
026597,000191: 34,2051 77624 CALL
026598,000192: 34,2052 46426 SHIFTR1 # RESCALE IF NEEDED
026599,000193: 34,2053 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026600,000194: 34,2054 45636 MAXCHK
026601,000195: 34,2055 36317 STCALL HAPO # APOGEE ALT 2(29) METERS, FOR DISPLAY
026602,000196: 34,2056 03632 QTEMP
026603,000197:
026604,000198:
End of include-file P30,P37.agc. Parent file is MAIN.agc