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! |
059061,000002: ## Copyright: Public domain.
059062,000003: ## Filename: T6-RUPT_PROGRAMS.agc
059063,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
059064,000005: ## It is part of the source code for the Lunar Module's (LM)
059065,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
059066,000007: ## Assembler: yaYUL
059067,000008: ## Contact: Ron Burkey <info@sandroid.org>.
059068,000009: ## Website: www.ibiblio.org/apollo.
059069,000010: ## Pages: 1403-1405
059070,000011: ## Mod history: 2009-05-10 SN (Sergio Navarro). Started adapting
059071,000012: ## from the Luminary131/ file of the same
059072,000013: ## name, using Luminary099 page images.
059073,000014: ## 2016-12-18 RSB Proofed text comments with octopus/ProoferComments
059074,000015: ## and corrected the errors found.
059075,000016: ## 2017-03-03 RSB Snapshot of Luminary 99 Rev 1.
059076,000017:
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Page 1403 |
059078,000019: # PROGRAM NAMES: (1) T6JOBCHK MOD. NO. 5 OCTOBER 2, 1967
059079,000020: # (2) DOT6RUPT
059080,000021: # MODIFICATION BY: LOWELL G HULL (A.C.ELECTRONICS)
059081,000022:
059082,000023: # THESE PROGRAMS ENABLE THE LM DAP TO CONTROL THE THRUST TIMES OF THE REACTION CONTROL SYSTEM JETS BY USING TIME6.
059083,000024: # SINCE THE LM DAP MAINTAINS EXCLUSIVE CONTROL OVER TIME6 AND ITS INTERRUPTS, THE FOLLOWING CONVENTIONS HAVE BEEN
059084,000025: # ESTABLISHED AND MUST NOT BE TAMPERED WITH:
059085,000026: # 1. NO NUMBER IS EVER PLACED INTO TIME6 EXCEPT BY LM DAP.
059086,000027: # 2. NO PROGRAM OTHER THAN LM DAP ENABLES THE TIME6 COUNTER.
059087,000028: # 3. TO USE TIME6, THE FOLLOWING SEQUENCE IS ALWAYS EMPLOYED:
059088,000029: # A. A POSITIVE (NON-ZERO) NUMBER IS STORED IN TIME6.
059089,000030: # B. THE TIME6 CLOCK IS ENABLED.
059090,000031: # C. TIME6 IS INTERROGATED AND IS:
059091,000032: # I. NEVER FOUND NEGATIVE (NON-ZERO) OR +0.
059092,000033: # II. SOMETIMES FOUND POSITIVE (BETWEEN 1 AND 240D) INDICATING THAT IT IS ACTIVE.
059093,000034: # III. SOMETIMES FOUND POSMAX INDICATING THAT IT IS INACTIVE AND NOT ENABLED.
059094,000035: # IV. SOMETIMES FOUND NEGATIVE ZERO INDICATING THAT:
059095,000036: # A. A T6RUPT IS ABOUT TO OCCUR AT THE NEXT DINC, OR
059096,000037: # B. A T6RUPT IS WAITING IN THE PRIORITY CHAIN, OR
059097,000038: # C. A T6RUPT IS IN PROCESS NOW.
059098,000039: # 4. ALL PROGRAMS WHICH OPERATE IN EITHER INTERRUPT MODE OR WITH INTERRUPT INHIBITED MUST CALL T6JOBCHK
059099,000040: # EVERY 5 MILLISECONDS TO PROCESS A POSSIBLE WAITING T6RUPT BEFORE IT CAN BE HONORED BY THE HARDWARE.
059100,000041: # (5. PROGRAM JTLST, IN Q,R-AXES, HANDLES THE INPUT LIST.)
059101,000042:
059102,000043: # T6JOBCHK CALLING SEQUENCE:
059103,000044: # L TC T6JOBCHK
059104,000045: # L+1 (RETURN)
059105,000046:
059106,000047: # DOT6RUPT CALLING SEQUENCE:
059107,000048: # DXCH ARUPT T6RUPT LEAD IN AT LOCATION 4004.
059108,000049: # EXTEND
059109,000050: # DCA T6ADR
059110,000051: # DTCB
059111,000052:
059112,000053: # SUBROUTINES CALLED: DOT6RUPT CALLS T6JOBCHK.
059113,000054:
059114,000055: # NORMAL EXIT MODES: T6JOBCHK RETURNS TO L +1.
059115,000056: # DOT6RUPT TRANSFERS CONTROL TO RESUME.
059116,000057:
059117,000058: # ALARM/ABORT MODES: NONE.
059118,000059:
059119,000060: # INPUT: TIME6 NXT6ADR OUTPUT: TIME6 NXT6ADR CHANNEL 5
059120,000061: # T6NEXT T6NEXT +1 T6NEXT T6NEXT +1 CHANNEL 6
059121,000062: # T6FURTHA T6FURTHA +1 T6FURTHA T6FURTHA +1 BIT15/CH13
059122,000063:
059123,000064: # DEBRIS: T6JOBCHK CLOBBERS A. DOT6RUPT CLOBBERS NOTHING.
059124,000065:
059125,000066: 5753 BLOCK 02
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Page 1404 |
059127,000068: 17,2027 BANK 17
059128,000069: 17,2000 SETLOC DAPS2
059129,000070: 17,2000 BANK
059130,000071: 17,2027 E6,1466 EBANK= T6NEXT
059131,000072: 17,2027 COUNT* $$/DAPT6
059132,000073:
059133,000074: 17,2027 10031 T6JOBCHK CCS TIME6 # CHECK TIME6 FOR WAITING T6RUPT:
059134,000075: 17,2030 00002 TC Q # NONE: CLOCK COUTING DOWN.
059135,000076: 17,2031 05705 TC CCSHOLE
059136,000077: 17,2032 02032 TC T6JOBCHK +3
059137,000078:
059138,000079: # CONTROL PASSES TO T6JOB ONLY WHEN C(TIME6) = -0 (I.E. WHEN A T6RUPT MUST BE PROCESSED).
059139,000080:
059140,000081: 17,2033 34733 T6JOB CAF POSMAX # DISABLE CLOCK: NEEDED SINCE RUPT OCCURS
059141,000082: 17,2034 00006 EXTEND # 1 DINC AFTER T6 = 77777. FOR 625 MUSECS
059142,000083: 17,2035 03013 WAND CHAN13 # MUST NOT HAVE T6 = +0 WITH ENABLE SET
059143,000084:
059144,000085: 17,2036 34733 CA POSMAX
059145,000086: 17,2037 22007 ZL
059146,000087: 17,2040 53471 DXCH T6FURTHA
059147,000088: 17,2041 53467 DXCH T6NEXT
059148,000089: 17,2042 23465 LXCH NXT6ADR
059149,000090: 17,2043 54031 TS TIME6
059150,000091:
059151,000092: 17,2044 67725 AD PRIO37
059152,000093: 17,2045 54000 TS A
059153,000094: 17,2046 12052 TCF ENABLET6
059154,000095: 17,2047 34733 CA POSMAX
059155,000096: 17,2050 54031 TS TIME6
059156,000097: 17,2051 12063 TCF GOCH56
059157,000098: 17,2052 34735 ENABLET6 CA BIT15
059158,000099: 17,2053 00006 EXTEND
059159,000100: 17,2054 05013 WOR CHAN13
059160,000101: 17,2055 31466 CA T6NEXT
059161,000102: 17,2056 67725 AD PRIO37
059162,000103: 17,2057 54000 TS A
059163,000104: 17,2060 12063 TCF GOCH56
059164,000105: 17,2061 34733 CA POSMAX
059165,000106: 17,2062 55466 TS T6NEXT
059166,000107: 17,2063 50001 GOCH56 INDEX L
059167,000108: 17,2064 15753 TCF WRITEP -1
059168,000109:
059169,000110: 5753 BLOCK 02
059170,000111: 4000 SETLOC FFTAG9
059171,000112: 4000 BANK
059172,000113: 5753 E6,1635 EBANK= CDUXD
059173,000114: 5753 COUNT* $$/DAPT6
059174,000115:
059175,000116: 5753 31472 CA NEXTP
059176,000117: 5754 00006 WRITEP EXTEND
059177,000118: 5755 01006 WRITE CHAN6
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Page 1405 |
059179,000120: 5756 00002 TC Q
059180,000121:
059181,000122: 5757 31473 CA NEXTU
059182,000123: 5760 54001 WRITEU TS L
059183,000124: 5761 45774 CS 00314OCT
059184,000125: 5762 00006 EXTEND
059185,000126: 5763 02005 RAND CHAN5
059186,000127: 5764 60001 AD L
059187,000128: 5765 00006 EXTEND
059188,000129: 5766 01005 WRITE CHAN5
059189,000130: 5767 00002 TC Q
059190,000131:
059191,000132: 5770 31474 CA NEXTV
059192,000133: 5771 54001 WRITEV TS L
059193,000134: 5772 35774 CA 00314OCT
059194,000135: 5773 15762 TCF -9D
059195,000136: 5774 00314 00314OCT OCT 00314
059196,000137:
059197,000138: 17,2065 BANK 17
059198,000139: 17,2000 SETLOC DAPS2
059199,000140: 17,2000 BANK
059200,000141:
059201,000142: 17,2065 E6,1466 EBANK= T6NEXT
059202,000143: 17,2065 COUNT* $$/DAPT6
059203,000144:
059204,000145: 17,2065 22016 DOT6RUPT LXCH BANKRUPT # (INTERRUPT LEAD INS CONTINUED)
059205,000146: 17,2066 00006 EXTEND
059206,000147: 17,2067 22012 QXCH QRUPT
059207,000148:
059208,000149: 17,2070 02027 TC T6JOBCHK # CALL T6JOBCHK.
059209,000150:
059210,000151: 17,2071 15270 TCF RESUME # END TIME6 INTERRUPT PROCESSOR.
059211,000152:
End of include-file T6-RUPT_PROGRAMS.agc. Parent file is MAIN.agc