Source Code
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This is a reconstructed version of Luminary 130, the initial AGC program released
in November 1969 for the Apollo 13 LM. Three more releases
followed before the flown revision was finally manufactured in February 1970.
This reconstruction was created from a previous transcription of the original listing of
Luminary 131, combined with Luminary memo #129 which describes the small difference
between the Luminary 130 and 131. The reconstructed source code was verified by
matching memory-bank checksums to those listed for Luminary 130 in drawing 2021152G.
In this source code, program comments from the original (Luminary 131) code are
prefixed with '#', while those added later by the Virtual AGC project are prefixed
with '##'.
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059367,000002: ## Copyright: Public domain.
059368,000003: ## Filename: DAP_INTERFACE_SUBROUTINES.agc
059369,000004: ## Purpose: A section of the reconstructed source code for Luminary 130.
059370,000005: ## This was the original program released for the Apollo 13 LM,
059371,000006: ## although several more revisions would follow. It has been
059372,000007: ## reconstructed from a listing of Luminary 131, from which it
059373,000008: ## differs on only two lines in P70-P71. The difference is
059374,000009: ## described in detail in Luminary memo #129, which was used
059375,000010: ## to perform the reconstruction. This file is intended to be a
059376,000011: ## faithful reconstruction, except that the code format has been
059377,000012: ## changed to conform to the requirements of the yaYUL assembler
059378,000013: ## rather than the original YUL assembler.
059379,000014: ## Reference: pp. 1398-1401
059380,000015: ## Contact: Ron Burkey <info@sandroid.org>.
059381,000016: ## Website: www.ibiblio.org/apollo/index.html
059382,000017: ## Mod history: 06/07/03 RSB. Began transcribing.
059383,000018: ## 05/14/05 RSB Corrected website reference above.
059384,000019: ## 2010-10-25 JL Indentation fixes.
059385,000020: ## 2017-01-06 RSB Page numbers now agree with those on the
059386,000021: ## original hardcopy, as opposed to the PDF page
059387,000022: ## numbers in 1701.pdf.
059388,000023: ## 2017-02-28 RSB Proofed comment text using octopus/ProoferComments.
059389,000024: ## 2017-03-01 RSB Fixed lingering comment-text typos.
059390,000025: ## 2017-03-10 RSB Comment-text fixes noted in proofing Luminary 116.
059391,000026: ## 2018-09-04 MAS Copied from Luminary 131 for Luminary 130.
059392,000027:
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Page 1398
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059394,000029: 20,2115 BANK 20
059395,000030: 20,2000 SETLOC DAPS3
059396,000031: 20,2000 BANK
059397,000032:
059398,000033: 20,2115 E6,1634 EBANK= CDUXD
059399,000034: 20,2115 COUNT* $$/DAPIF
059400,000035:
059401,000036: # MOD 0 DATE 11/15/66 BY GEORGE W. CHERRY
059402,000037: # MOD 1 1/23/67 MODIFICATION BY PETER ADLER
059403,000038:
059404,000039: # FUNCTIONAL DESCRIPTION
059405,000040: # HEREIN ARE A COLLECTION OF SUBROUTINES WHICH ALLOW MISSION CONTROL PROGRAMS TO CONTROL THE MODE
059406,000041: # AND INTERFACE WITH THE DAP.
059407,000042:
059408,000043: # CALLING SEQUENCES
059409,000044: # IN INTERRUPT OR WITH INTERRUPT INHIBITED
059410,000045: # TC IBNKCALL
059411,000046: # FCADR ROUTINE
059412,000047: # IN A JOB WITHOUT INTERRUPT INHIBITED
059413,000048: # INHINT
059414,000049: # TC IBNKCALL
059415,000050: # FCADR ROUTINE
059416,000051: # RELINT
059417,000052:
059418,000053: # OUTPUT
059419,000054: # SEE INDIVIDUAL ROUTINES BELOW
059420,000055:
059421,000056: # DEBRIS
059422,000057: # A, L, AND SOMETIMES MDUETEMP ODE NOT IN PULSES MODE
059423,000058:
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Page 1399
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059425,000060: # SUBROUTINE NAMES:
059426,000061: # SETMAXDB, SETMINDB, RESTORDB, PFLITEDB
059427,000062: # MODIFIED: 30 JANUARY 1968 BY P S WEISSMAN TO CREATE RESTORDB.
059428,000063: # MODIFIED: 1 MARCH 1968 BY P S WEISSMAN TO SAVE EBANK AND CREATE PFLITEDB
059429,000064:
059430,000065: # FUNCTIONAL DESCRIPTION:
059431,000066: # SETMAXDB - SET DEADBAND TO 5.0 DEGREES
059432,000067: # SETMINDB - SET DEADBAND TO 0.3 DEGREE
059433,000068: # RESTORDB - SET DEADBAND TO .3, 1, OR 5 ACCORDING TO BITS 4 AND 5 OF DAPBOOLS
059434,000069: # PFLITEDB - SET DEADBAND TO 1.0 DEGREE AND ZERO THE COMMANDED ATTITUDE CHANGE AND COMMANDED RATE
059435,000070:
059436,000071: # ALL ENTRIES SET UP A NOVAC JOB TO DO 1/ACCS SO THAT THE TJETLAW SWITCH CURVES ARE POSITIONED TO
059437,000072: # REFLECT THE NEW DEADBAND. IT SHOULD BE NOTED THAT THE DEADBAND REFERS TO THE ATTITUDE IN THE P-, U-, AND V-AXES.
059438,000073:
059439,000074: # SUBROUTINE CALLED: NOVAC
059440,000075:
059441,000076: # CALLING SEQUENCE: SAME AS ABOVE
059442,000077: # OR TC RESTORDB +1 FROM ALLCOAST
059443,000078:
059444,000079: # DEBRIS: A, L, Q, RUPTREG1, (ITEMPS IN NOVAC)
059445,000080:
059446,000081: 20,2115 30111 RESTORDB CAE DAPBOOLS # DETERMINE CREW-SELECTED DEADBAND.
059447,000082: 20,2116 74747 MASK DBSLECT2 # CHECK FOR MAX DB (5 DEG)
059448,000083: 20,2117 00006 EXTEND
059449,000084: 20,2120 12122 BZF +2
059450,000085: 20,2121 12130 TCF SETMAXDB # BIT5 DAPBOOLS IS SET - CREW WANTS 5 DEG
059451,000086: 20,2122 30111 CAE DAPBOOLS
059452,000087: 20,2123 74750 MASK DBSELECT # CHECK FOR 1 DEG DEADBAND SELECTION
059453,000088: 20,2124 00006 EXTEND
059454,000089: 20,2125 12141 BZF SETMINDB
059455,000090:
059456,000091: 20,2126 32153 CAF POWERDB # BIT4 DAPBOOLS IS SET - CREW WANTS 1 DEG
059457,000092: 20,2127 12131 TCF SETMAXDB +1
059458,000093: 20,2130 32152 SETMAXDB CAF WIDEDB # SET 5 DEGREE DEADBAND.
059459,000094: 20,2131 55343 +1 TS DB
059460,000095:
059461,000096: 20,2132 00006 EXTEND # SET UP JOB TO RE-POSITION SWITCH CURVES.
059462,000097: 20,2133 22070 QXCH RUPTREG1
059463,000098: 20,2134 37720 CALLACCS CAF PRIO27
059464,000099: 20,2135 05072 TC NOVAC
059465,000100: 20,2136 E6,1536 EBANK= AOSQ
059466,000101: 20,2136 03652 42106 2CADR 1/ACCJOB
059467,000102:
059468,000103: 20,2140 00070 TC RUPTREG1 # RETURN TO CALLER.
059469,000104:
059470,000105: 20,2141 32151 SETMINDB CAF NARROWDB # SET 0.3 DEGREE DEADBAND.
059471,000106: 20,2142 12131 TCF SETMAXDB +1
059472,000107:
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Page 1400
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059474,000109: 20,2143 00006 PFLITEDB EXTEND # THE RETURN FROM CALLACCS IS TO RUPTREG1.
059475,000110: 20,2144 22070 QXCH RUPTREG1
059476,000111: 20,2145 02154 TC ZATTEROR # ZERO THE ERRORS AND COMMANDED RATES.
059477,000112: 20,2146 32153 CAF POWERDB # SET DB TO 1.0 DEG.
059478,000113: 20,2147 55343 TS DB
059479,000114: 20,2150 12134 TCF CALLACCS # SET UP 1/ACCS AND RETURN TO CALLER.
059480,000115: 20,2151 00155 NARROWDB OCTAL 00155 # 0.3 DEGREE SCALED AT 45.
059481,000116: 20,2152 03434 WIDEDB OCTAL 03434 # 5.0 DEGREES SCALED AT 45.
059482,000117: 20,2153 00554 POWERDB DEC .02222 # 1.0 DEGREE SCALED AT 45.
059483,000118:
059484,000119: 20,2154 35015 ZATTEROR CAF EBANK6
059485,000120: 20,2155 56003 XCH EBANK
059486,000121: 20,2156 54001 TS L # SAVE CALLERS EBANK IN L.
059487,000122: 20,2157 30032 CAE CDUX
059488,000123: 20,2160 55634 TS CDUXD
059489,000124: 20,2161 30033 CAE CDUY
059490,000125: 20,2162 55635 TS CDUYD
059491,000126: 20,2163 30034 CAE CDUZ
059492,000127: 20,2164 55636 TS CDUZD
059493,000128: 20,2165 12171 TCF STOPRATE +3
059494,000129:
059495,000130: 20,2166 35015 STOPRATE CAF EBANK6
059496,000131: 20,2167 56003 XCH EBANK
059497,000132: 20,2170 54001 TS L # SAVE CALLERS EBANK IN L.
059498,000133: 20,2171 34755 +3 CAF ZERO
059499,000134: 20,2172 55642 TS OMEGAPD
059500,000135: 20,2173 55643 TS OMEGAQD
059501,000136: 20,2174 55644 TS OMEGARD
059502,000137: 20,2175 55637 TS DELCDUX
059503,000138: 20,2176 55640 TS DELCDUY
059504,000139: 20,2177 55641 TS DELCDUZ
059505,000140: 20,2200 55274 TS DELPEROR
059506,000141: 20,2201 55275 TS DELQEROR
059507,000142: 20,2202 55276 TS DELREROR
059508,000143: 20,2203 22003 LXCH EBANK # RESTORE CALLERS EBANK.
059509,000144: 20,2204 00002 TC Q
059510,000145:
059511,000146: # SUBROUTINE NAME: ALLCOAST
059512,000147: # WILL BE CALLED BY FRESH STARTS AND ENGINE OFF ROUTINES. .
059513,000148:
059514,000149: # CALLING SEQUENCE: (SAME AS ABOVE)
059515,000150:
059516,000151: # EXIT: RETURN TO Q.
059517,000152:
059518,000153: # SUBROUTINES CALLED: STOPRATE, RESTORDB, NOVAC
059519,000154:
059520,000155: # ZERO: (FOR ALL AXES) AOS, ALPHA, AOSTERM, OMEGAD, DELCDU, DELEROR
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Page 1401
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059522,000157:
059523,000158: # OUTPUT: DRIFTBIT/DAPBOOLS, DB, JOB TO DO 1/ACCS
059524,000159:
059525,000160: # DEBRIS: A, L, Q, RUPTREG1, RUPTREG2, (ITEMPS IN NOVAC)
059526,000161:
059527,000162: 20,2205 00006 ALLCOAST EXTEND # SAVE Q FOR RETURN
059528,000163: 20,2206 22071 QXCH RUPTREG2
059529,000164: 20,2207 02166 TC STOPRATE # CLEAR RATE INTERFACE. RETURN WITH A=0
059530,000165: 20,2210 22003 LXCH EBANK # AND L=EBANK6. SAVE CALLERS EBANK.
059531,000166: 20,2211 55536 TS AOSQ
059532,000167: 20,2212 55537 TS AOSQ +1
059533,000168: 20,2213 55540 TS AOSR
059534,000169: 20,2214 55541 TS AOSR +1
059535,000170: 20,2215 55424 TS ALPHAQ # FOR DOWNLIST.
059536,000171: 20,2216 55425 TS ALPHAR
059537,000172: 20,2217 55544 TS AOSQTERM
059538,000173: 20,2220 55545 TS AOSRTERM
059539,000174: 20,2221 22003 LXCH EBANK # RESTORE EBANK (EBANK6 NO LONGER NEEDED)
059540,000175:
059541,000176: 20,2222 40111 CS DAPBOOLS # SET UP DRIFTBIT
059542,000177: 20,2223 74744 MASK DRIFTBIT
059543,000178: 20,2224 26111 ADS DAPBOOLS
059544,000179: 20,2225 02116 TC RESTORDB +1 # RESTORE DEADBANK TO CREW-SELECTED VALUE.
059545,000180:
059546,000181: 20,2226 00071 TC RUPTREG2 # RETURN.
059547,000182:
059548,000183:
059549,000184:
End of include-file DAP_INTERFACE_SUBROUTINES.agc. Parent file is MAIN.agc