Source Code
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These source-code files are part of a reconstructed copy of Luminary 96, the
original release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with reconstructed source code for Luminary 97. Changes
between revisions 96 and 97 were backed out, as described by anomal report LNY-59.
transcribed from a digitized copy of that program. The reconstruction was
verified by matching memory-bank checksums to those listed in drawing 2021152D.
Note that page numbers in the reconstructed code match those on the Luminary 099
revision 001 printout, although the added code would likely have changed page
numbers for a real Luminary 96 listing.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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015170,000002: ## Copyright: Public domain.
015171,000003: ## Filename: SYSTEM_TEST_STANDARD_LEAD_INS.agc
015172,000004: ## Purpose: A section of Luminary revision 96.
015173,000005: ## It is part of the reconstructed source code for the
015174,000006: ## original release of the flight software for the Lunar
015175,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
015176,000008: ## The code has been recreated from a previously reconstructed
015177,000009: ## copy of Luminary 97 by undoing changes described in anomaly
015178,000010: ## report LNY-59. The code has been adapted such that the
015179,000011: ## resulting bugger words exactly match those specified for
015180,000012: ## Luminary 96 in NASA drawing 2021152D, which gives relatively
015181,000013: ## high confidence that the reconstruction is correct.
015182,000014: ## Reference: pp. 370-372
015183,000015: ## Assembler: yaYUL
015184,000016: ## Contact: Ron Burkey <info@sandroid.org>.
015185,000017: ## Website: www.ibiblio.org/apollo/index.html
015186,000018: ## Mod history: 2019-08-04 MAS Created from Luminary 97.
015187,000019:
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Page 370
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015189,000021: 22,3242 E5,1642 EBANK= XSM
015190,000022:
015191,000023: 33,2045 BANK 33
015192,000024: 04,2000 SETLOC E/PROG
015193,000025: 04,2000 BANK
015194,000026:
015195,000027: 04,2576 COUNT* $$/P07
015196,000028:
015197,000029: # SPECIAL PROGRAMS TO EASE THE PANGS OF ERASABLE MEMORY PROGRAMS.
015198,000030:
015199,000031: # E/BKCALL FOR DOING BANKCALLS FROM AND RETURNING TO ERASABLE.
015200,000032:
015201,000033: # THIS ROUTINE IS CALLABLE FROM ERASABLE OR FIXED. LIKE BANKCALL, HOWEVER, SWITCHING BETWEEN S3 AND S4
015202,000034: # IS NOT POSSIBLE.
015203,000035:
015204,000036: # THE CALLING SEQUENCE IS:
015205,000037:
015206,000038: # TC BANKCALL
015207,000039: # CADR E/BKCALL
015208,000040: # CADR ROUTINE WHERE YOU WANT TO GO IN FIXED.
015209,000041: # RETURN HERE FROM DISPLAY TERMINATE, BAD STALL OR TC Q.
015210,000042: # RETURN HERE FROM DISPLAY PROCEED OR GOOD RETURN FROM STALL.
015211,000043: # RETURN HERE FROM DISPLAY ENTER OR RECYCLE.
015212,000044:
015213,000045: # THIS ROUTINE REQUIRES TWO ERASABLES (EBUF2, +1) IN UNSWITCHED WHICH ARE UNSHARED BY INTERRUPTS AND
015214,000046: # OTHER EMEMORY PROGRAMS.
015215,000047:
015216,000048: # A + L ARE PRESERVED THROUGH BANKCALL AND E/BKCALL.
015217,000049:
015218,000050: 04,2576 52134 E/BKCALL DXCH BUF2 # SAVE A,L AND GET DP RETURN.
015219,000051: 04,2577 53170 DXCH EBUF2 # SAVE DP RETURN.
015220,000052: 04,2600 25167 INCR EBUF2 # RETURN +1 BECAUSE DOUBLE CADR.
015221,000053: 04,2601 30006 CA BBANK
015222,000054: 04,2602 75012 MASK LOW10 # GET CURRENT EBANK. (SBANK SOMEDAY)
015223,000055: 04,2603 27170 ADS EBUF2 +1 # FORM BBCON. (WAS FBANK)
015224,000056: 04,2604 51167 NDX EBUF2
015225,000057: 04,2605 27777 CA 0 -1 # GET CADR OF ROUTINE.
015226,000058: 04,2606 04622 TC SWCALL # GO TO ROUTINE, SETTING Q TO SWRETURN
015227,000059: # AND RESTORING A + L.
015228,000060: 04,2607 02613 TC +4 # TX Q, V34, OR BAD STALL RETURN.
015229,000061: 04,2610 02612 TC +2 # PROCEED OR GOOD STALL RETURN.
015230,000062: 04,2611 25167 INCR EBUF2 # ENTER OR RECYCLE RETURN.
015231,000063: 04,2612 25167 INCR EBUF2
015232,000064: 04,2613 53170 E/SWITCH DXCH EBUF2
015233,000065: 04,2614 52006 DTCB
015234,000066:
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Page 371
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015236,000068: # E/CALL FOR CALLING A FIXED MEMORY INTERPRETIVE SUBROUTINE FROM ERASABLE AND RETURNING TO ERASABLE.
015237,000069:
015238,000070: # THE CALLING SEQUENCE IS...
015239,000071:
015240,000072: # RTB
015241,000073: # E/CALL
015242,000074: # CADR ROUTINE THE INTERPRETIVE SUBROUTINE YOU WANT.
015243,000075: # RETURNS HERE IN INTERPRETIVE.
015244,000076:
015245,000077: 04,2615 22164 E/CALL LXCH LOC # ADRES -1 OF CADR.
015246,000078: 04,2616 50001 INDEX L
015247,000079: 04,2617 30001 CA L # CADR IN A.
015248,000080: 04,2620 24001 INCR L
015249,000081: 04,2621 24001 INCR L # RETURN ADRES IN L.
015250,000082: 04,2622 53170 DXCH EBUF2 # STORE CADR AND RETURN.
015251,000083: 04,2623 06037 TC INTPRET
015252,000084: 04,2624 77624 CALL
015253,000085: 04,2625 01167 EBUF2 # INDIRECTLY EXECUTE ROUTINE. IT MUST
015254,000086: 04,2626 77776 EXIT # LEAVE VIA RVQ OR EQUIVALENT.
015255,000087: 04,2627 23170 LXCH EBUF2 +1 # PICK UP RETURN.
015256,000088: 04,2630 16041 TCF INTPRET +2 # SET LOC AND RETURN TO CALLER.
015257,000089:
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Page 372
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015259,000091: # E/JOBWAK FOR WAKING UP ERASABLE MEMORY JOBS.
015260,000092:
015261,000093: # THIS ROUTINE MUST BE CALLED IN INTERRUPT OR WITH INTERRUPTS INHIBITED.
015262,000094:
015263,000095: # THE CALLING SEQUENCE IS:
015264,000096:
015265,000097: # INHINT
015266,000098: # .
015267,000099: # .
015268,000100: # CA WAKEADR ADDRESS OF SLEEPING JOB
015269,000101: # TC IBNKCALL
015270,000102: # CADR E/JOBWAK
015271,000103: # . RETURNS HERE
015272,000104: # .
015273,000105: # .
015274,000106: # RELINT IF YOU DID AN INHINT.
015275,000107:
015276,000108: 33,2045 BANK 33
015277,000109: 04,2000 SETLOC E/PROG
015278,000110: 04,2000 BANK
015279,000111:
015280,000112: 04,2631 COUNT* $$/P07
015281,000113:
015282,000114: 04,2631 05137 E/JOBWAK TC JOBWAKE # ARRIVE IWTH ADRES IN A.
015283,000115: 04,2632 44741 CS BIT11
015284,000116: 04,2633 50064 NDX LOCCTR
015285,000117: 04,2634 26164 ADS LOC # KNOCK FIXED MEMORY BIT OUT OF ADRES.
015286,000118: 04,2635 00072 TC RUPTREG3 # RETURN
015287,000119:
End of include-file SYSTEM_TEST_STANDARD_LEAD_INS.agc. Parent file is MAIN.agc