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! |
059219,000002: ## Copyright: Public domain.
059220,000003: ## Filename: DAP_INTERFACE_SUBROUTINES.agc
059221,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
059222,000005: ## It is part of the source code for the Lunar Module's (LM)
059223,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
059224,000007: ## Assembler: yaYUL
059225,000008: ## Contact: Ron Burkey <info@sandroid.org>.
059226,000009: ## Website: www.ibiblio.org/apollo.
059227,000010: ## Pages: 1406-1409
059228,000011: ## Mod history: 2009-05-10 SN (Sergio Navarro). Started adapting
059229,000012: ## from the Luminary131/ file of the same
059230,000013: ## name, using Luminary099 page images.
059231,000014: ## 2011-01-06 JL Fixed pseudo-label indentation.
059232,000015: ## 2016-12-18 RSB Proofed text comments with octopus/ProoferComments
059233,000016: ## and corrected the errors found.
059234,000017: ## 2017-03-03 RSB Snapshot of Luminary 99 Rev 1.
059235,000018: ## 2017-03-10 RSB Comment-text fixes noted in proofing Luminary 116.
059236,000019:
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Page 1406 |
059238,000021: 20,2123 BANK 20
059239,000022: 20,2000 SETLOC DAPS3
059240,000023: 20,2000 BANK
059241,000024:
059242,000025: 20,2123 E6,1635 EBANK= CDUXD
059243,000026: 20,2123 COUNT* $$/DAPIF
059244,000027:
059245,000028: # MOD 0 DATE 11/15/66 BY GEORGE W. CHERRY
059246,000029: # MOD 1 1/23/67 MODIFICATION BY PETER ADLER
059247,000030:
059248,000031: # FUNCTIONAL DESCRIPTION
059249,000032: # HEREIN ARE A COLLECTION OF SUBROUTINES WHICH ALLOW MISSION CONTROL PROGRAMS TO CONTROL THE MODE
059250,000033: # AND INTERFACE WITH THE DAP.
059251,000034:
059252,000035: # CALLING SEQUENCES
059253,000036: # IN INTERRUPT OR WITH INTERRUPT INHIBITED
059254,000037: # TC IBNKCALL
059255,000038: # FCADR ROUTINE
059256,000039: # IN A JOB WITHOUT INTERRUPT INHIBITED
059257,000040: # INHINT
059258,000041: # TC IBNKCALL
059259,000042: # FCADR ROUTINE
059260,000043: # RELINT
059261,000044:
059262,000045: # OUTPUT
059263,000046: # SEE INDIVIDUAL ROUTINES BELOW
059264,000047:
059265,000048: # DEBRIS
059266,000049: # A, L, AND SOMETIMES MDUETEMP ODE NOT IN PULSES MODE
059267,000050:
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Page 1407 |
059269,000052: # SUBROUTINE NAMES:
059270,000053: # SETMAXDB, SETMINDB, RESTORDB, PFLITEDB
059271,000054: # MODIFIED: 30 JANUARY 1968 BY P S WEISSMAN TO CREATE RESTORDB.
059272,000055: # MODIFIED: 1 MARCH 1968 BY P S WEISSMAN TO SAVE EBANK AND CREATE PFLITEDB
059273,000056:
059274,000057: # FUNCTIONAL DESCRIPTION:
059275,000058: # SETMAXDB - SET DEADBAND TO 5.0 DEGREES
059276,000059: # SETMINDB - SET DEADBAND TO 0.3 DEGREE
059277,000060: # RESTORDB - SET DEADBAND TO MAX OR MIN ACCORDING TO SETTING OF DBSELECT BIT OF DAPBOOLS
059278,000061: # PFLITEDB - SET DEADBAND TO 1.0 DEGREE AND ZERO THE COMMANDED ATTITUDE CHANGE AND COMMANDED RATE
059279,000062:
059280,000063: # ALL ENTRIES SET UP A NOVAC JOB TO DO 1/ACCS SO THAT THE TJETLAW SWITCH CURVES ARE POSITIONED TO
059281,000064: # REFLECT THE NEW DEADBAND. IT SHOULD BE NOTED THAT THE DEADBAND REFERS TO THE ATTITUDE IN THE P-, U-, AND V-AXES.
059282,000065:
059283,000066: # SUBROUTINE CALLED: NOVAC
059284,000067:
059285,000068: # CALLING SEQUENCE: SAME AS ABOVE
059286,000069: # OR TC RESTORDB +1 FROM ALLCOAST
059287,000070:
059288,000071: # DEBRIS: A, L, Q, RUPTREG1, (ITEMPS IN NOVAC)
059289,000072:
059290,000073: 20,2123 30111 RESTORDB CAE DAPBOOLS # DETERMINE CREW-SELECTED DEADBAND.
059291,000074: 20,2124 74750 MASK DBSELECT
059292,000075: 20,2125 00006 EXTEND
059293,000076: 20,2126 12140 BZF SETMINDB
059294,000077:
059295,000078: 20,2127 32151 SETMAXDB CAF WIDEDB # SET 5 DEGREE DEADBAND.
059296,000079: 20,2130 55346 +1 TS DB
059297,000080:
059298,000081: 20,2131 00006 EXTEND # SET UP JOB TO RE-POSITION SWITCH CURVES.
059299,000082: 20,2132 22070 QXCH RUPTREG1
059300,000083: 20,2133 37715 CALLACCS CAF PRIO27
059301,000084: 20,2134 05072 TC NOVAC
059302,000085: 20,2135 E6,1537 EBANK= AOSQ
059303,000086: 20,2135 02454 40106 2CADR 1/ACCJOB
059304,000087:
059305,000088: 20,2137 00070 TC RUPTREG1 # RETURN TO CALLER.
059306,000089:
059307,000090: 20,2140 32150 SETMINDB CAF NARROWDB # SET 0.3 DEGREE DEADBAND.
059308,000091: 20,2141 12130 TCF SETMAXDB +1
059309,000092:
059310,000093: 20,2142 00006 PFLITEDB EXTEND # THE RETURN FROM CALLACCS IS TO RUPTREG1.
059311,000094: 20,2143 22070 QXCH RUPTREG1
059312,000095: 20,2144 02153 TC ZATTEROR # ZERO THE ERRORS AND COMMANDED RATES.
059313,000096: 20,2145 32152 CAF POWERDB # SET DB TO 1.0 DEG.
059314,000097: 20,2146 55346 TS DB
059315,000098: 20,2147 12133 TCF CALLACCS # SET UP 1/ACCS AND RETURN TO CALLER.
059316,000099: 20,2150 00155 NARROWDB OCTAL 00155 # 0.3 DEGREE SCALED AT 45.
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Page 1408 |
059318,000101: 20,2151 03434 WIDEDB OCTAL 03434 # 5.0 DEGREES SCALED AT 45.
059319,000102: 20,2152 00554 POWERDB DEC .02222 # 1.0 DEGREE SCALED AT 45.
059320,000103:
059321,000104: 20,2153 35015 ZATTEROR CAF EBANK6
059322,000105: 20,2154 56003 XCH EBANK
059323,000106: 20,2155 54001 TS L # SAVE CALLERS EBANK IN L.
059324,000107: 20,2156 30032 CAE CDUX
059325,000108: 20,2157 55635 TS CDUXD
059326,000109: 20,2160 30033 CAE CDUY
059327,000110: 20,2161 55636 TS CDUYD
059328,000111: 20,2162 30034 CAE CDUZ
059329,000112: 20,2163 55637 TS CDUZD
059330,000113: 20,2164 12170 TCF STOPRATE +3
059331,000114:
059332,000115: 20,2165 35015 STOPRATE CAF EBANK6
059333,000116: 20,2166 56003 XCH EBANK
059334,000117: 20,2167 54001 TS L # SAVE CALLERS EBANK IN L.
059335,000118: 20,2170 34755 +3 CAF ZERO
059336,000119: 20,2171 55643 TS OMEGAPD
059337,000120: 20,2172 55644 TS OMEGAQD
059338,000121: 20,2173 55645 TS OMEGARD
059339,000122: 20,2174 55640 TS DELCDUX
059340,000123: 20,2175 55641 TS DELCDUY
059341,000124: 20,2176 55642 TS DELCDUZ
059342,000125: 20,2177 55277 TS DELPEROR
059343,000126: 20,2200 55300 TS DELQEROR
059344,000127: 20,2201 55301 TS DELREROR
059345,000128: 20,2202 22003 LXCH EBANK # RESTORE CALLERS EBANK.
059346,000129: 20,2203 00002 TC Q
059347,000130:
059348,000131: # SUBROUTINE NAME: ALLCOAST
059349,000132: # WILL BE CALLED BY FRESH STARTS AND ENGINE OFF ROUTINES. .
059350,000133:
059351,000134: # CALLING SEQUENCE: (SAME AS ABOVE)
059352,000135:
059353,000136: # EXIT: RETURN TO Q.
059354,000137:
059355,000138: # SUBROUTINES CALLED: STOPRATE, RESTORDB, NOVAC
059356,000139:
059357,000140: # ZERO: (FOR ALL AXES) AOS, ALPHA, AOSTERM, OMEGAD, DELCDU, DELEROR
059358,000141:
059359,000142: # OUTPUT: DRIFTBIT/DAPBOOLS, DB, JOB TO DO 1/ACCS
059360,000143:
059361,000144: # DEBRIS: A, L, Q, RUPTREG1, RUPTREG2, (ITEMPS IN NOVAC)
059362,000145:
059363,000146: 20,2204 00006 ALLCOAST EXTEND # SAVE Q FOR RETURN
059364,000147: 20,2205 22071 QXCH RUPTREG2
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Page 1409 |
059366,000149: 20,2206 02165 TC STOPRATE # CLEAR RATE INTERFACE. RETURN WITH A=0
059367,000150: 20,2207 22003 LXCH EBANK # AND L=EBANK6. SAVE CALLERS EBANK.
059368,000151: 20,2210 55537 TS AOSQ
059369,000152: 20,2211 55540 TS AOSQ +1
059370,000153: 20,2212 55541 TS AOSR
059371,000154: 20,2213 55542 TS AOSR +1
059372,000155: 20,2214 55424 TS ALPHAQ # FOR DOWNLIST.
059373,000156: 20,2215 55425 TS ALPHAR
059374,000157: 20,2216 55545 TS AOSQTERM
059375,000158: 20,2217 55546 TS AOSRTERM
059376,000159: 20,2220 22003 LXCH EBANK # RESTORE EBANK (EBANK6 NO LONGER NEEDED)
059377,000160:
059378,000161: 20,2221 40111 CS DAPBOOLS # SET UP DRIFTBIT
059379,000162: 20,2222 74744 MASK DRIFTBIT
059380,000163: 20,2223 26111 ADS DAPBOOLS
059381,000164: 20,2224 02124 TC RESTORDB +1 # RESTORE DEADBANK TO CREW-SELECTED VALUE.
059382,000165:
059383,000166: 20,2225 00071 TC RUPTREG2 # RETURN.
059384,000167:
End of include-file DAP_INTERFACE_SUBROUTINES.agc. Parent file is MAIN.agc