GAP: ASSEMBLE REVISION 069 OF AGC PROGRAM LUMINARY BY NASA 2021112-011 19:02 NOV. 25,1968Note that the date is the date of the printout, not the date of the program revision.
Source Code
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These source-code files were transcribed from scans made from Don Eyles's personal
copy of Luminary 069. They were scanned at archive.org's Boston
facility, and the scanning was sponsored by Onno Hommes. The code was transcribed
from these scans by a team of volunteers who are referenced in the program
comments. Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". In some cases, where
similar code blocks exist in previously-transcribed AGC programs (primarily
Luminary 99, from Apollo 11) those code blocks were used as a starting point and
then corrected to agree with the Luminary 69 scans. The full scans are available
at the Virtual AGC
project's collection at archive.org, while more-convenient reduced-size (but reduced-quality)
images are available at
the main Virtual AGC website. Report any errors noted by creating an
issue report at the Virtual AGC
project's GitHub repository. Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 069 OF AGC PROGRAM LUMINARY BY NASA 2021112-011 19:02 NOV. 25,1968Note that the date is the date of the printout, not the date of the program revision. |
016308,000002: ## Copyright: Public domain.
016309,000003: ## Filename: GIMBAL_LOCK_AVOIDANCE.agc
016310,000004: ## Purpose: The main source file for Luminary revision 069.
016311,000005: ## It is part of the source code for the original release
016312,000006: ## of the flight software for the Lunar Module's (LM) Apollo
016313,000007: ## Guidance Computer (AGC) for Apollo 10. The actual flown
016314,000008: ## version was Luminary 69 revision 2, which included a
016315,000009: ## newer lunar gravity model and only affected module 2.
016316,000010: ## This file is intended to be a faithful transcription, except
016317,000011: ## that the code format has been changed to conform to the
016318,000012: ## requirements of the yaYUL assembler rather than the
016319,000013: ## original YUL assembler.
016320,000014: ## Reference: p. 377
016321,000015: ## Assembler: yaYUL
016322,000016: ## Contact: Ron Burkey <info@sandroid.org>.
016323,000017: ## Website: www.ibiblio.org/apollo/index.html
016324,000018: ## Mod history: 2016-12-13 MAS Created from Luminary 99.
016325,000019: ## 2016-12-14 MAS Updated from comment-proofed Luminary 99 version.
016326,000020: ## 2017-01-13 RRB Updated for Luminary 69.
016327,000021: ## 2017-01-27 RSB Proofed comment text using octopus/prooferComments
016328,000022: ## and fixed errors found.
016329,000023: ## 2017-08-22 RSB Fixed comment-text typo identified in ZERLINA 56.
016330,000024:
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Page 377 |
016332,000026: 15,2050 BANK 15
016333,000027:
016334,000028: 22,2000 SETLOC KALCMON1
016335,000029: 22,2000 BANK
016336,000030:
016337,000031: # DETECTING GIMBAL LOCK
016338,000032: 22,2744 22,2744 LOCSKIRT EQUALS NOGIMLOC
016339,000033:
016340,000034: 22,2744 77614 NOGIMLOC SET
016341,000035: 22,2745 01074 CALCMAN3
016342,000036: 22,2746 70740 WCALC LXC,1 DLOAD*
016343,000037: 22,2747 01325 RATEINDX # CHOOSE THE DESIRED MANEUVER RATE
016344,000038: 22,2750 04772 ARATE,1 # FROM A LIST OF FOUR
016345,000039: 22,2751 45002 SR4 CALL # COMPUTE THE INCREMENTAL ROTATION MATRIX
016346,000040: 22,2752 44527 DELCOMP # DEL CORRESPONDING TO A 1 SEC ROTATION
016347,000041: # ABOUT COF
016348,000042: 22,2753 74343 DLOAD* VXSC
016349,000043: 22,2754 04772 ARATE,1
016350,000044: 22,2755 03267 COF
016351,000045: 22,2756 17324 STODL BRATE # COMPONENT MANEUVER RATES 45 DEG/SEC
016352,000046: 22,2757 03334 AM
016353,000047: 22,2760 55605 DMP DDV*
016354,000048: 22,2761 05002 ANGLTIME
016355,000049: 22,2762 04772 ARATE,1
016356,000050: 22,2763 77661 SR
016357,000051: 22,2764 20606 5
016358,000052: 22,2765 03332 STORE TM # MANEUVER EXECUTION TIME SCALED AS T2
016359,000053: 22,2766 77614 SETGO
016360,000054: 22,2767 01035 CALCMAN2 # 0(OFF) = CONTINUE MANEUVER
016361,000055: 22,2770 45010 NEWANGL +1 # 1(ON) = START MANEUVER
016362,000056:
016363,000057: # THE FOUR SELECTABLE FREE FALL MANEUVER RATES SELECTED BY
016364,000058: # LOADING RATEINDX WITH 0, 2, 4, 6, RESPECTIVELY
016365,000059:
016366,000060: 22,2771 00221 24255 ARATE 2DEC .0088888888 # = 0.2 DEG/SEC $ 22.5 DEG/SEC
016367,000061:
016368,000062: 22,2773 00554 02660 2DEC .0222222222 # = 0.5 DEG/SEC $ 22.5 DEG/SEC
016369,000063:
016370,000064: 22,2775 02660 13301 2DEC .0888888888 # = 2.0 DEG/SEC $ 22.5 DEG/SEC
016371,000065:
016372,000066: 22,2777 16161 30707 2DEC .4444444444 # = 10.0 DEG/SEC $ 22.5 DEG/SEC
016373,000067:
016374,000068: 22,3001 00003 04000 ANGLTIME 2DEC .0001907349 # = 100B-19 FUDGE FACTOR TO CONVERT
016375,000069: # MANEUVER ANGLE TO MANEUVER TIME
016376,000070:
016377,000071:
End of include-file GIMBAL_LOCK_AVOIDANCE.agc. Parent file is MAIN.agc