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! |
059214,000002: ## Copyright: Public domain.
059215,000003: ## Filename: DAP_INTERFACE_SUBROUTINES.agc
059216,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
059217,000005: ## It is part of the source code for the Lunar Module's (LM)
059218,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
059219,000007: ## Assembler: yaYUL
059220,000008: ## Contact: Ron Burkey <info@sandroid.org>.
059221,000009: ## Website: www.ibiblio.org/apollo.
059222,000010: ## Pages: 1406-1409
059223,000011: ## Mod history: 2009-05-10 SN (Sergio Navarro). Started adapting
059224,000012: ## from the Luminary131/ file of the same
059225,000013: ## name, using Luminary099 page images.
059226,000014: ## 2011-01-06 JL Fixed pseudo-label indentation.
059227,000015: ## 2016-12-18 RSB Proofed text comments with octopus/ProoferComments
059228,000016: ## and corrected the errors found.
059229,000017: ## 2017-03-03 RSB Snapshot of Luminary 99 Rev 1.
059230,000018: ## 2017-03-10 RSB Comment-text fixes noted in proofing Luminary 116.
059231,000019:
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Page 1406 |
059233,000021: 20,2123 BANK 20
059234,000022: 20,2000 SETLOC DAPS3
059235,000023: 20,2000 BANK
059236,000024:
059237,000025: 20,2123 E6,1635 EBANK= CDUXD
059238,000026: 20,2123 COUNT* $$/DAPIF
059239,000027:
059240,000028: # MOD 0 DATE 11/15/66 BY GEORGE W. CHERRY
059241,000029: # MOD 1 1/23/67 MODIFICATION BY PETER ADLER
059242,000030:
059243,000031: # FUNCTIONAL DESCRIPTION
059244,000032: # HEREIN ARE A COLLECTION OF SUBROUTINES WHICH ALLOW MISSION CONTROL PROGRAMS TO CONTROL THE MODE
059245,000033: # AND INTERFACE WITH THE DAP.
059246,000034:
059247,000035: # CALLING SEQUENCES
059248,000036: # IN INTERRUPT OR WITH INTERRUPT INHIBITED
059249,000037: # TC IBNKCALL
059250,000038: # FCADR ROUTINE
059251,000039: # IN A JOB WITHOUT INTERRUPT INHIBITED
059252,000040: # INHINT
059253,000041: # TC IBNKCALL
059254,000042: # FCADR ROUTINE
059255,000043: # RELINT
059256,000044:
059257,000045: # OUTPUT
059258,000046: # SEE INDIVIDUAL ROUTINES BELOW
059259,000047:
059260,000048: # DEBRIS
059261,000049: # A, L, AND SOMETIMES MDUETEMP ODE NOT IN PULSES MODE
059262,000050:
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Page 1407 |
059264,000052: # SUBROUTINE NAMES:
059265,000053: # SETMAXDB, SETMINDB, RESTORDB, PFLITEDB
059266,000054: # MODIFIED: 30 JANUARY 1968 BY P S WEISSMAN TO CREATE RESTORDB.
059267,000055: # MODIFIED: 1 MARCH 1968 BY P S WEISSMAN TO SAVE EBANK AND CREATE PFLITEDB
059268,000056:
059269,000057: # FUNCTIONAL DESCRIPTION:
059270,000058: # SETMAXDB - SET DEADBAND TO 5.0 DEGREES
059271,000059: # SETMINDB - SET DEADBAND TO 0.3 DEGREE
059272,000060: # RESTORDB - SET DEADBAND TO MAX OR MIN ACCORDING TO SETTING OF DBSELECT BIT OF DAPBOOLS
059273,000061: # PFLITEDB - SET DEADBAND TO 1.0 DEGREE AND ZERO THE COMMANDED ATTITUDE CHANGE AND COMMANDED RATE
059274,000062:
059275,000063: # ALL ENTRIES SET UP A NOVAC JOB TO DO 1/ACCS SO THAT THE TJETLAW SWITCH CURVES ARE POSITIONED TO
059276,000064: # REFLECT THE NEW DEADBAND. IT SHOULD BE NOTED THAT THE DEADBAND REFERS TO THE ATTITUDE IN THE P-, U-, AND V-AXES.
059277,000065:
059278,000066: # SUBROUTINE CALLED: NOVAC
059279,000067:
059280,000068: # CALLING SEQUENCE: SAME AS ABOVE
059281,000069: # OR TC RESTORDB +1 FROM ALLCOAST
059282,000070:
059283,000071: # DEBRIS: A, L, Q, RUPTREG1, (ITEMPS IN NOVAC)
059284,000072:
059285,000073: 20,2123 30111 RESTORDB CAE DAPBOOLS # DETERMINE CREW-SELECTED DEADBAND.
059286,000074: 20,2124 74750 MASK DBSELECT
059287,000075: 20,2125 00006 EXTEND
059288,000076: 20,2126 12140 BZF SETMINDB
059289,000077:
059290,000078: 20,2127 32151 SETMAXDB CAF WIDEDB # SET 5 DEGREE DEADBAND.
059291,000079: 20,2130 55346 +1 TS DB
059292,000080:
059293,000081: 20,2131 00006 EXTEND # SET UP JOB TO RE-POSITION SWITCH CURVES.
059294,000082: 20,2132 22070 QXCH RUPTREG1
059295,000083: 20,2133 37715 CALLACCS CAF PRIO27
059296,000084: 20,2134 05072 TC NOVAC
059297,000085: 20,2135 E6,1537 EBANK= AOSQ
059298,000086: 20,2135 02454 40106 2CADR 1/ACCJOB
059299,000087:
059300,000088: 20,2137 00070 TC RUPTREG1 # RETURN TO CALLER.
059301,000089:
059302,000090: 20,2140 32150 SETMINDB CAF NARROWDB # SET 0.3 DEGREE DEADBAND.
059303,000091: 20,2141 12130 TCF SETMAXDB +1
059304,000092:
059305,000093: 20,2142 00006 PFLITEDB EXTEND # THE RETURN FROM CALLACCS IS TO RUPTREG1.
059306,000094: 20,2143 22070 QXCH RUPTREG1
059307,000095: 20,2144 02153 TC ZATTEROR # ZERO THE ERRORS AND COMMANDED RATES.
059308,000096: 20,2145 32152 CAF POWERDB # SET DB TO 1.0 DEG.
059309,000097: 20,2146 55346 TS DB
059310,000098: 20,2147 12133 TCF CALLACCS # SET UP 1/ACCS AND RETURN TO CALLER.
059311,000099: 20,2150 00155 NARROWDB OCTAL 00155 # 0.3 DEGREE SCALED AT 45.
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Page 1408 |
059313,000101: 20,2151 03434 WIDEDB OCTAL 03434 # 5.0 DEGREES SCALED AT 45.
059314,000102: 20,2152 00554 POWERDB DEC .02222 # 1.0 DEGREE SCALED AT 45.
059315,000103:
059316,000104: 20,2153 35015 ZATTEROR CAF EBANK6
059317,000105: 20,2154 56003 XCH EBANK
059318,000106: 20,2155 54001 TS L # SAVE CALLERS EBANK IN L.
059319,000107: 20,2156 30032 CAE CDUX
059320,000108: 20,2157 55635 TS CDUXD
059321,000109: 20,2160 30033 CAE CDUY
059322,000110: 20,2161 55636 TS CDUYD
059323,000111: 20,2162 30034 CAE CDUZ
059324,000112: 20,2163 55637 TS CDUZD
059325,000113: 20,2164 12170 TCF STOPRATE +3
059326,000114:
059327,000115: 20,2165 35015 STOPRATE CAF EBANK6
059328,000116: 20,2166 56003 XCH EBANK
059329,000117: 20,2167 54001 TS L # SAVE CALLERS EBANK IN L.
059330,000118: 20,2170 34755 +3 CAF ZERO
059331,000119: 20,2171 55643 TS OMEGAPD
059332,000120: 20,2172 55644 TS OMEGAQD
059333,000121: 20,2173 55645 TS OMEGARD
059334,000122: 20,2174 55640 TS DELCDUX
059335,000123: 20,2175 55641 TS DELCDUY
059336,000124: 20,2176 55642 TS DELCDUZ
059337,000125: 20,2177 55277 TS DELPEROR
059338,000126: 20,2200 55300 TS DELQEROR
059339,000127: 20,2201 55301 TS DELREROR
059340,000128: 20,2202 22003 LXCH EBANK # RESTORE CALLERS EBANK.
059341,000129: 20,2203 00002 TC Q
059342,000130:
059343,000131: # SUBROUTINE NAME: ALLCOAST
059344,000132: # WILL BE CALLED BY FRESH STARTS AND ENGINE OFF ROUTINES. .
059345,000133:
059346,000134: # CALLING SEQUENCE: (SAME AS ABOVE)
059347,000135:
059348,000136: # EXIT: RETURN TO Q.
059349,000137:
059350,000138: # SUBROUTINES CALLED: STOPRATE, RESTORDB, NOVAC
059351,000139:
059352,000140: # ZERO: (FOR ALL AXES) AOS, ALPHA, AOSTERM, OMEGAD, DELCDU, DELEROR
059353,000141:
059354,000142: # OUTPUT: DRIFTBIT/DAPBOOLS, DB, JOB TO DO 1/ACCS
059355,000143:
059356,000144: # DEBRIS: A, L, Q, RUPTREG1, RUPTREG2, (ITEMPS IN NOVAC)
059357,000145:
059358,000146: 20,2204 00006 ALLCOAST EXTEND # SAVE Q FOR RETURN
059359,000147: 20,2205 22071 QXCH RUPTREG2
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Page 1409 |
059361,000149: 20,2206 02165 TC STOPRATE # CLEAR RATE INTERFACE. RETURN WITH A=0
059362,000150: 20,2207 22003 LXCH EBANK # AND L=EBANK6. SAVE CALLERS EBANK.
059363,000151: 20,2210 55537 TS AOSQ
059364,000152: 20,2211 55540 TS AOSQ +1
059365,000153: 20,2212 55541 TS AOSR
059366,000154: 20,2213 55542 TS AOSR +1
059367,000155: 20,2214 55424 TS ALPHAQ # FOR DOWNLIST.
059368,000156: 20,2215 55425 TS ALPHAR
059369,000157: 20,2216 55545 TS AOSQTERM
059370,000158: 20,2217 55546 TS AOSRTERM
059371,000159: 20,2220 22003 LXCH EBANK # RESTORE EBANK (EBANK6 NO LONGER NEEDED)
059372,000160:
059373,000161: 20,2221 40111 CS DAPBOOLS # SET UP DRIFTBIT
059374,000162: 20,2222 74744 MASK DRIFTBIT
059375,000163: 20,2223 26111 ADS DAPBOOLS
059376,000164: 20,2224 02124 TC RESTORDB +1 # RESTORE DEADBANK TO CREW-SELECTED VALUE.
059377,000165:
059378,000166: 20,2225 00071 TC RUPTREG2 # RETURN.
059379,000167:
End of include-file DAP_INTERFACE_SUBROUTINES.agc. Parent file is MAIN.agc