Source Code
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This is an attempt to recreate Luminary 99 Rev 2, otherwise known as LUM99R2, from Luminary 99 Rev 1 and ephemeris data from Luminary 116. The differences are confined to the last 10-12 lines of the CONTROLLED CONSTANTS. Luminary 99 Rev 1 source-code was transcribed from a printout in the MIT Museum, while Luminary 116 source code was transcribed from a printout belonging to Don Eyles. AGC developer James Kernan, the "rope mother" for the Apollo 11 Lunar Module's AGC, explains as follows: "At the last minute, Dan Lickly, our chief engineer, appeared with ephemerides updates and it took two tries to get it right. The result was that we created Lum99 Revision 1 and Lum99 Revision 2." It is suspected that the former is what's in the MIT Museum, and the latter is what we are trying to recreate here. As for which revision actually flew in Apollo 11, all of the other available surviving evidence points to Rev 1 rather than to Rev 2, so we're just not sure! |
025934,000002: ## Copyright: Public domain.
025935,000003: ## Filename: P30_P37.agc
025936,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
025937,000005: ## It is part of the source code for the Lunar Module's (LM)
025938,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
025939,000007: ## Assembler: yaYUL
025940,000008: ## Contact: Ron Burkey <info@sandroid.org>.
025941,000009: ## Website: www.ibiblio.org/apollo.
025942,000010: ## Pages: 614-617
025943,000011: ## Mod history: 2009-05-17 RSB Adapted from the corresponding
025944,000012: ## Luminary131 file, using page
025945,000013: ## images from Luminary 1A.
025946,000014: ## 2009-06-05 RSB Removed 4 lines of code that shouldn't
025947,000015: ## have survived from Luminary 131.
025948,000016: ## 2016-12-13 RSB GOTOP00H -> GOTOPOOH
025949,000017: ## 2016-12-14 RSB VNP00H -> VNPOOH.
025950,000018: ## 2016-12-14 RSB Proofed text comments with octopus/ProoferComments
025951,000019: ## and corrected the errors found.
025952,000020: ## 2017-03-03 RSB Snapshot of Luminary 99 Rev 1.
025953,000021:
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Page 614 |
025955,000023: # PROGRAM DESCRIPTION P30 DATE 3-6-67
025956,000024:
025957,000025: # MOD.1 BY RAMA AIYAWAR
025958,000026:
025959,000027: # FUNCTIONAL DESCRIPTION
025960,000028: # ACCEPT ASTRONAUT INPUTS OF TIG,DELV(LV)
025961,000029: # CALL IMU STATUS CHECK ROUTINE (R02)
025962,000030: # DISPLAY TIME TO GO, APOGEE, PERIGEE, DELV(MAG), MGA AT IGN
025963,000031: # REQUEST BURN PROGRAM
025964,000032:
025965,000033: # CALLING SEQUENCE VIA JOB FROM V37
025966,000034:
025967,000035: # EXIT VIA V37 CALL OR TO GOTOPOOH (V34E)
025968,000036:
025969,000037: # SUBROUTINE CALLS - FLAGUP, PHASCHNG, BANKCALL, ENDOFJOB, GOFLASH, GOFLASHR
025970,000038: # GOPERF3R, INTPRET, BLANKET, GOTOPOOH, R02BOTH, S30.1,
025971,000039: # TTG/N35, MIDGIM, DISPMGA
025972,000040:
025973,000041: # ERASABLE INITIALIZATION - STATE VECTOR
025974,000042:
025975,000043: # OUTPUT - RINIT, VINIT, +MGA, VTIG, RTIG, DELVSIN, DELVSAB, DELVSLV, HAPO,
025976,000044: # HPER, TTOGO
025977,000045:
025978,000046: # DEBRIS - A, L, MPAC, PUSHLIST
025979,000047:
025980,000048: 32,2776 BANK 32
025981,000049: 35,2000 SETLOC P30S
025982,000050: 35,2000 BANK
025983,000051: 35,2000 E4,1652 EBANK= +MGA
025984,000052: 35,2000 COUNT* $$/P30
025985,000053: 35,2000 05504 P30 TC UPFLAG # SET UPDATE FLAG
025986,000054: 35,2001 00027 ADRES UPDATFLG
025987,000055: 35,2002 05504 TC UPFLAG # SET TRACK FLAG
025988,000056: 35,2003 00031 ADRES TRACKFLG
025989,000057:
025990,000058: 35,2004 32025 P30N33 CAF V06N33 # T OF IGN
025991,000059: 35,2005 03712 TC VNPOOH # RETURNS ON PROCEED, POOH ON TERMINATE
025992,000060:
025993,000061: 35,2006 33727 CAF V06N81 # DISPLAY DELTA V (LV)
025994,000062: 35,2007 03712 TC VNPOOH # REDISPLAY ON RECYCLE
025995,000063:
025996,000064: 35,2010 05516 TC DOWNFLAG # RESET UPDATE FLAG
025997,000065: 35,2011 00027 ADRES UPDATFLG
025998,000066: 35,2012 06037 TC INTPRET
025999,000067: 35,2013 77624 CALL
026000,000068: 35,2014 70000 S30.1
026001,000069: 35,2015 77414 SET EXIT
026002,000070: 35,2016 00470 UPDATFLG
026003,000071: 35,2017 32026 PARAM30 CAF V06N42 # DISPLAY APOGEE,PERIGEE,DELTA V
026004,000072: 35,2020 03712 TC VNPOOH
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Page 615 |
026006,000074:
026007,000075: 35,2021 06037 TC INTPRET
026008,000076: 35,2022 77614 SETGO
026009,000077: 35,2023 01027 XDELVFLG # FOR P40'S: EXTERNAL DELTA-V GUIDANCE.
026010,000078: 35,2024 72540 REVN1645 # TRKMKCNT, TGO, +MGA DISPLAY
026011,000079:
026012,000080: 35,2025 01441 V06N33 VN 0633
026013,000081: 35,2026 01452 V06N42 VN 0642
026014,000082:
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026016,000084: # PROGRAM DESCRIPTION S30.1 DATE 9NOV66
026017,000085: # MOD NO 1 LOG SECTION P30,P37
026018,000086: # MOD BY RAMA AIYAWAR **
026019,000087:
026020,000088: # FUNCTIONAL DESCRIPTION
026021,000089: # BASED ON STORED TARGET PARAMETERS (R OF IGNITION (RTIG), V OF
026022,000090: # IGNITION (VTIG), TIME OF IGNITION (TIG)), COMPUTE PERIGEE ALTITUDE
026023,000091: # APOGEE ALTITUDE AND DELTAV REQUIRED (DELVSIN).
026024,000092:
026025,000093: # CALLING SEQUENCE
026026,000094: # L CALL
026027,000095: # L+1 S30.1
026028,000096:
026029,000097: # NORMAL EXIT MODE
026030,000098: # AT L+2 OR CALLING SEQUENCE (GOTO L+2)
026031,000099:
026032,000100: # SUBROUTINES CALLED
026033,000101: # LEMPREC
026034,000102: # PERIAPO
026035,000103:
026036,000104: # ALARM OR ABORT EXIT MODES
026037,000105: # NONE
026038,000106:
026039,000107: # ERASABLE INITIALIZATION REQUIRED
026040,000108: # TIG TIME OF IGNITION DP B28CS
026041,000109: # DELVSLV SPECIFIED DELTA-V IN LOCAL VERT.
026042,000110: # COORDS. OF ACTIVE VEHICLE AT
026043,000111: # TIME OF IGNITION VECTOR B+7 METERS/CS
026044,000112:
026045,000113: # OUTPUT
026046,000114: # RTIG POSITION AT TIG VECTOR B+29 METERS
026047,000115: # VTIG VELOCITY AT TIG VECTOR B+29 METERS/CS
026048,000116: # PDL 4D APOGEE ALTITUDE DP B+29 M, B+27 METERS.
026049,000117: # HAPO APOGEE ALTITUDE DP B+29 METERS
026050,000118: # PDL 8D PERIGEE ALTITUDE DP B+29 M, B+27 METERS.
026051,000119: # HPER PERIGEE ALTITUDE DP B+29 METERS
026052,000120: # DELVSIN SPECIFIED DELTA-V IN INERTIAL
026053,000121: # COORD. OF ACTIVE VEHICLE AT
026054,000122: # TIME OF IGNITION VECTOR B+7 METERS/CS
026055,000123: # DELVSAB MAG. OF DELVSIN VECTOR B+7 METERS/CS
026056,000124:
026057,000125: # DEBRIS QTEMP TEMP.ERASABLE
026058,000126: # QPRET, MPAC
026059,000127: # PUSHLIST
026060,000128:
026061,000129: 34,2000 SETLOC P30S1
026062,000130: 34,2000 BANK
026063,000131:
026064,000132: 34,2000 COUNT* $$/S30S
026065,000133:
026066,000134: 34,2000 71220 S30.1 STQ DLOAD
026067,000135: 34,2001 03632 QTEMP
026068,000136: 34,2002 03442 TIG # TIME IGNITION SCALED AT 2(+28)CS
026069,000137: 34,2003 34041 STCALL TDEC1
026070,000138: 34,2004 27057 LEMPREC # ENCKE ROUTINE FOR LEM
026071,000139:
026072,000140: 34,2005 67175 VLOAD SXA,2
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026074,000142: 34,2006 00001 RATT
026075,000143: 34,2007 02777 RTX2
026076,000144: 34,2010 03642 STORE RTIG # RADIUS VECTOR AT IGNITION TIME
026077,000145: 34,2011 57456 UNIT VCOMP
026078,000146: 34,2012 27656 STOVL DELVSIN # ZRF/LV IN DELVSIN SCALED AT 2
026079,000147: 34,2013 00007 VATT # VELOCITY VECTOR AT TIG, SCALED 2(7) M/CS
026080,000148: 34,2014 03650 STORE VTIG
026081,000149: 34,2015 53435 VXV UNIT
026082,000150: 34,2016 03642 RTIG
026083,000151: 34,2017 66001 SETPD SXA,1
026084,000152: 34,2020 00001 0
026085,000153: 34,2021 02776 RTX1
026086,000154: 34,2022 47206 PUSH VXV # YRF/LV PDL 0 SCALED AT 2
026087,000155: 34,2023 03656 DELVSIN
026088,000156: 34,2024 63372 VSL1 PDVL
026089,000157: 34,2025 63315 PDVL PDVL # YRF/LV PDL 6 SCALED AT 2
026090,000158: 34,2026 03656 DELVSIN # ZRF/LV PDL 12D SCALED AT 2
026091,000159: 34,2027 03434 DELVSLV
026092,000160: 34,2030 76505 VXM VSL1
026093,000161: 34,2031 00001 0
026094,000162: 34,2032 03656 STORE DELVSIN # DELTAV IN INERT. COOR. SCALED TO B+7M/CS
026095,000163: 34,2033 77646 ABVAL
026096,000164: 34,2034 27664 STOVL DELVSAB # DELTA V MAG.
026097,000165: 34,2035 03642 RTIG # (FOR PERIAPO)
026098,000166: 34,2036 53315 PDVL VAD # VREQUIRED = VTIG + DELVSIN (FOR PERIAPO)
026099,000167: 34,2037 03650 VTIG
026100,000168: 34,2040 03656 DELVSIN
026101,000169: 34,2041 77624 CALL
026102,000170: 34,2042 46316 PERIAPO1
026103,000171: 34,2043 77624 CALL
026104,000172: 34,2044 46426 SHIFTR1 # RESCALE IF NEEDED
026105,000173: 34,2045 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026106,000174: 34,2046 45636 MAXCHK
026107,000175: 34,2047 16321 STODL HPER # PERIGEE ALT 2(29) METERS, FOR DISPLAY
026108,000176: 34,2050 00005 4D
026109,000177: 34,2051 77624 CALL
026110,000178: 34,2052 46426 SHIFTR1 # RESCALE IF NEEDED
026111,000179: 34,2053 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026112,000180: 34,2054 45636 MAXCHK
026113,000181: 34,2055 36317 STCALL HAPO # APOGEE ALT 2(29) METERS, FOR DISPLAY
026114,000182: 34,2056 03632 QTEMP
026115,000183:
026116,000184:
End of include-file P30,P37.agc. Parent file is MAIN.agc