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. |
059376,000002: ## Copyright: Public domain.
059377,000003: ## Filename: DAP_INTERFACE_SUBROUTINES.agc
059378,000004: ## Purpose: A section of Luminary revision 116.
059379,000005: ## It is part of the source code for the Lunar Module's (LM)
059380,000006: ## Apollo Guidance Computer (AGC) for Apollo 12.
059381,000007: ## This file is intended to be a faithful transcription, except
059382,000008: ## that the code format has been changed to conform to the
059383,000009: ## requirements of the yaYUL assembler rather than the
059384,000010: ## original YUL assembler.
059385,000011: ## Reference: pp. 1396-1399
059386,000012: ## Assembler: yaYUL
059387,000013: ## Contact: Ron Burkey <info@sandroid.org>.
059388,000014: ## Website: www.ibiblio.org/apollo/index.html
059389,000015: ## Mod history: 2017-01-22 MAS Created from Luminary 99.
059390,000016: ## 2017-02-08 NV Updated for Luminary 116.
059391,000017: ## 2017-03-10 RSB Proofed comment text via 3-way diff vs
059392,000018: ## Luminary 99 and 132 ... no problems found.
059393,000019:
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Page 1396 |
059395,000021: 20,2115 BANK 20
059396,000022: 20,2000 SETLOC DAPS3
059397,000023: 20,2000 BANK
059398,000024:
059399,000025: 20,2115 E6,1635 EBANK= CDUXD
059400,000026: 20,2115 COUNT* $$/DAPIF
059401,000027:
059402,000028: # MOD 0 DATE 11/15/66 BY GEORGE W. CHERRY
059403,000029: # MOD 1 1/23/67 MODIFICATION BY PETER ADLER
059404,000030:
059405,000031: # FUNCTIONAL DESCRIPTION
059406,000032: # HEREIN ARE A COLLECTION OF SUBROUTINES WHICH ALLOW MISSION CONTROL PROGRAMS TO CONTROL THE MODE
059407,000033: # AND INTERFACE WITH THE DAP.
059408,000034:
059409,000035: # CALLING SEQUENCES
059410,000036: # IN INTERRUPT OR WITH INTERRUPT INHIBITED
059411,000037: # TC IBNKCALL
059412,000038: # FCADR ROUTINE
059413,000039: # IN A JOB WITHOUT INTERRUPT INHIBITED
059414,000040: # INHINT
059415,000041: # TC IBNKCALL
059416,000042: # FCADR ROUTINE
059417,000043: # RELINT
059418,000044:
059419,000045: # OUTPUT
059420,000046: # SEE INDIVIDUAL ROUTINES BELOW
059421,000047:
059422,000048: # DEBRIS
059423,000049: # A, L, AND SOMETIMES MDUETEMP ODE NOT IN PULSES MODE
059424,000050:
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Page 1397 |
059426,000052: # SUBROUTINE NAMES:
059427,000053: # SETMAXDB, SETMINDB, RESTORDB, PFLITEDB
059428,000054: # MODIFIED: 30 JANUARY 1968 BY P S WEISSMAN TO CREATE RESTORDB.
059429,000055: # MODIFIED: 1 MARCH 1968 BY P S WEISSMAN TO SAVE EBANK AND CREATE PFLITEDB
059430,000056:
059431,000057: # FUNCTIONAL DESCRIPTION:
059432,000058: # SETMAXDB - SET DEADBAND TO 5.0 DEGREES
059433,000059: # SETMINDB - SET DEADBAND TO 0.3 DEGREE
059434,000060: # RESTORDB - SET DEADBAND TO .3, 1, OR 5 ACCORDING TO BITS 4 AND 5 OF DAPBOOLS
059435,000061: # PFLITEDB - SET DEADBAND TO 1.0 DEGREE AND ZERO THE COMMANDED ATTITUDE CHANGE AND COMMANDED RATE
059436,000062:
059437,000063: # ALL ENTRIES SET UP A NOVAC JOB TO DO 1/ACCS SO THAT THE TJETLAW SWITCH CURVES ARE POSITIONED TO
059438,000064: # REFLECT THE NEW DEADBAND. IT SHOULD BE NOTED THAT THE DEADBAND REFERS TO THE ATTITUDE IN THE P-, U-, AND V-AXES.
059439,000065:
059440,000066: # SUBROUTINE CALLED: NOVAC
059441,000067:
059442,000068: # CALLING SEQUENCE: SAME AS ABOVE
059443,000069: # OR TC RESTORDB +1 FROM ALLCOAST
059444,000070:
059445,000071: # DEBRIS: A, L, Q, RUPTREG1, (ITEMPS IN NOVAC)
059446,000072:
059447,000073: 20,2115 30111 RESTORDB CAE DAPBOOLS # DETERMINE CREW-SELECTED DEADBAND.
059448,000074: 20,2116 74747 MASK DBSLECT2 # CHECK FOR MAX DB (5 DEG)
059449,000075: 20,2117 00006 EXTEND
059450,000076: 20,2120 12122 BZF +2
059451,000077: 20,2121 12130 TCF SETMAXDB # BIT5 DAPBOOLS IS SET - CREW WANTS 5 DEG
059452,000078: 20,2122 30111 CAE DAPBOOLS
059453,000079: 20,2123 74750 MASK DBSELECT # CHECK FOR 1 DEG DEADBAND SELECTION
059454,000080: 20,2124 00006 EXTEND
059455,000081: 20,2125 12141 BZF SETMINDB
059456,000082:
059457,000083: 20,2126 32153 CAF POWERDB # BIT4 DAPBOOLS IS SET - CREW WANTS 1 DEG
059458,000084: 20,2127 12131 TCF SETMAXDB +1
059459,000085: 20,2130 32152 SETMAXDB CAF WIDEDB # SET 5 DEGREE DEADBAND.
059460,000086: 20,2131 55343 +1 TS DB
059461,000087:
059462,000088: 20,2132 00006 EXTEND # SET UP JOB TO RE-POSITION SWITCH CURVES.
059463,000089: 20,2133 22070 QXCH RUPTREG1
059464,000090: 20,2134 37720 CALLACCS CAF PRIO27
059465,000091: 20,2135 05072 TC NOVAC
059466,000092: 20,2136 E6,1537 EBANK= AOSQ
059467,000093: 20,2136 03644 42106 2CADR 1/ACCJOB
059468,000094:
059469,000095: 20,2140 00070 TC RUPTREG1 # RETURN TO CALLER.
059470,000096:
059471,000097: 20,2141 32151 SETMINDB CAF NARROWDB # SET 0.3 DEGREE DEADBAND.
059472,000098: 20,2142 12131 TCF SETMAXDB +1
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Page 1398 |
059474,000100: 20,2143 00006 PFLITEDB EXTEND # THE RETURN FROM CALLACCS IS TO RUPTREG1.
059475,000101: 20,2144 22070 QXCH RUPTREG1
059476,000102: 20,2145 02154 TC ZATTEROR # ZERO THE ERRORS AND COMMANDED RATES.
059477,000103: 20,2146 32153 CAF POWERDB # SET DB TO 1.0 DEG.
059478,000104: 20,2147 55343 TS DB
059479,000105: 20,2150 12134 TCF CALLACCS # SET UP 1/ACCS AND RETURN TO CALLER.
059480,000106: 20,2151 00155 NARROWDB OCTAL 00155 # 0.3 DEGREE SCALED AT 45.
059481,000107: 20,2152 03434 WIDEDB OCTAL 03434 # 5.0 DEGREES SCALED AT 45.
059482,000108: 20,2153 00554 POWERDB DEC .02222 # 1.0 DEGREE SCALED AT 45.
059483,000109:
059484,000110: 20,2154 35015 ZATTEROR CAF EBANK6
059485,000111: 20,2155 56003 XCH EBANK
059486,000112: 20,2156 54001 TS L # SAVE CALLERS EBANK IN L.
059487,000113: 20,2157 30032 CAE CDUX
059488,000114: 20,2160 55635 TS CDUXD
059489,000115: 20,2161 30033 CAE CDUY
059490,000116: 20,2162 55636 TS CDUYD
059491,000117: 20,2163 30034 CAE CDUZ
059492,000118: 20,2164 55637 TS CDUZD
059493,000119: 20,2165 12171 TCF STOPRATE +3
059494,000120:
059495,000121: 20,2166 35015 STOPRATE CAF EBANK6
059496,000122: 20,2167 56003 XCH EBANK
059497,000123: 20,2170 54001 TS L # SAVE CALLERS EBANK IN L.
059498,000124: 20,2171 34755 +3 CAF ZERO
059499,000125: 20,2172 55643 TS OMEGAPD
059500,000126: 20,2173 55644 TS OMEGAQD
059501,000127: 20,2174 55645 TS OMEGARD
059502,000128: 20,2175 55640 TS DELCDUX
059503,000129: 20,2176 55641 TS DELCDUY
059504,000130: 20,2177 55642 TS DELCDUZ
059505,000131: 20,2200 55274 TS DELPEROR
059506,000132: 20,2201 55275 TS DELQEROR
059507,000133: 20,2202 55276 TS DELREROR
059508,000134: 20,2203 22003 LXCH EBANK # RESTORE CALLERS EBANK.
059509,000135: 20,2204 00002 TC Q
059510,000136:
059511,000137: # SUBROUTINE NAME: ALLCOAST
059512,000138: # WILL BE CALLED BY FRESH STARTS AND ENGINE OFF ROUTINES. .
059513,000139:
059514,000140: # CALLING SEQUENCE: (SAME AS ABOVE)
059515,000141:
059516,000142: # EXIT: RETURN TO Q.
059517,000143:
059518,000144: # SUBROUTINES CALLED: STOPRATE, RESTORDB, NOVAC
059519,000145:
059520,000146: # ZERO: (FOR ALL AXES) AOS, ALPHA, AOSTERM, OMEGAD, DELCDU, DELEROR
059521,000147:
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Page 1399 |
059523,000149: # OUTPUT: DRIFTBIT/DAPBOOLS, DB, JOB TO DO 1/ACCS
059524,000150:
059525,000151: # DEBRIS: A, L, Q, RUPTREG1, RUPTREG2, (ITEMPS IN NOVAC)
059526,000152:
059527,000153: 20,2205 00006 ALLCOAST EXTEND # SAVE Q FOR RETURN
059528,000154: 20,2206 22071 QXCH RUPTREG2
059529,000155: 20,2207 02166 TC STOPRATE # CLEAR RATE INTERFACE. RETURN WITH A=0
059530,000156: 20,2210 22003 LXCH EBANK # AND L=EBANK6. SAVE CALLERS EBANK.
059531,000157: 20,2211 55537 TS AOSQ
059532,000158: 20,2212 55540 TS AOSQ +1
059533,000159: 20,2213 55541 TS AOSR
059534,000160: 20,2214 55542 TS AOSR +1
059535,000161: 20,2215 55424 TS ALPHAQ # FOR DOWNLIST.
059536,000162: 20,2216 55425 TS ALPHAR
059537,000163: 20,2217 55545 TS AOSQTERM
059538,000164: 20,2220 55546 TS AOSRTERM
059539,000165: 20,2221 22003 LXCH EBANK # RESTORE EBANK (EBANK6 NO LONGER NEEDED)
059540,000166:
059541,000167: 20,2222 40111 CS DAPBOOLS # SET UP DRIFTBIT
059542,000168: 20,2223 74744 MASK DRIFTBIT
059543,000169: 20,2224 26111 ADS DAPBOOLS
059544,000170: 20,2225 02116 TC RESTORDB +1 # RESTORE DEADBANK TO CREW-SELECTED VALUE.
059545,000171:
059546,000172: 20,2226 00071 TC RUPTREG2 # RETURN.
059547,000173:
End of include-file DAP_INTERFACE_SUBROUTINES.agc. Parent file is MAIN.agc