Notations on the program listing read, in part:
GAP: ASSEMBLE REVISION 56 OF AGC PROGRAM ZERLINA BY ZOROASTER 9:12 OCT. 21,1970Note 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 a printout in Don Eyles's personal
collection, scanned by archive.org, and financially sponsored by Linden Sims.
A team of volunteers performed the transcription and proof-reading. The scanned
page images are available at
the Virtual AGC Project website, as well as higher-quality (but much larger)
images at
the Virtual AGC Project's collection in the Internet Archive. Report any problems by creating
"issues" at
the Virtual AGC Project's GitHub Repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 56 OF AGC PROGRAM ZERLINA BY ZOROASTER 9:12 OCT. 21,1970Note that the date is the date of the printout, not the date of the program revision. |
016362,000002: ## Copyright: Public domain.
016363,000003: ## Filename: GIMBAL_LOCK_AVOIDANCE.agc
016364,000004: ## Purpose: A log section of Zerlina 56, the final revision of
016365,000005: ## Don Eyles's offline development program for the variable
016366,000006: ## guidance period servicer. It also includes a new P66 with LPD
016367,000007: ## (Landing Point Designator) capability, based on an idea of John
016368,000008: ## Young's. Neither of these advanced features were actually flown,
016369,000009: ## but Zerlina was also the birthplace of other big improvements to
016370,000010: ## Luminary including the terrain model and new (Luminary 1E)
016371,000011: ## analog display programs. Zerlina was branched off of Luminary 145,
016372,000012: ## and revision 56 includes all changes up to and including Luminary
016373,000013: ## 183. It is therefore quite close to the Apollo 14 program,
016374,000014: ## Luminary 178, where not modified with new features.
016375,000015: ## Reference: p. 369
016376,000016: ## Assembler: yaYUL
016377,000017: ## Contact: Ron Burkey <info@sandroid.org>.
016378,000018: ## Website: www.ibiblio.org/apollo/index.html
016379,000019: ## Mod history: 2017-07-28 MAS Created from Luminary 210.
016380,000020: ## 2017-08-22 RSB Transcribed.
016381,000021:
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Page 369 |
016383,000023: 15,2050 BANK 15
016384,000024:
016385,000025: 22,2000 SETLOC KALCMON1
016386,000026: 22,2000 BANK
016387,000027:
016388,000028:
016389,000029: # DETECTING GIMBAL LOCK
016390,000030: 22,2744 22,2744 LOCSKIRT EQUALS NOGIMLOC
016391,000031:
016392,000032: 22,2744 77614 NOGIMLOC SET
016393,000033: 22,2745 01074 CALCMAN3
016394,000034: 22,2746 70740 WCALC LXC,1 DLOAD*
016395,000035: 22,2747 01322 RATEINDX # CHOOSE THE DESIRED MANEUVER RATE
016396,000036: 22,2750 04772 ARATE,1 # FROM A LIST OF FOUR
016397,000037: 22,2751 45002 SR4 CALL # COMPUTE THE INCREMENTAL ROTATION MATRIX
016398,000038: 22,2752 44527 DELCOMP # DEL CORRESPONDING TO A 1 SEC ROTATION
016399,000039: # ABOUT COF
016400,000040: 22,2753 74343 DLOAD* VXSC
016401,000041: 22,2754 04772 ARATE,1
016402,000042: 22,2755 03270 COF
016403,000043: 22,2756 17325 STODL BRATE # COMPONENT MANEUVER RATES 45 DEG/SEC
016404,000044: 22,2757 03335 AM
016405,000045: 22,2760 55605 DMP DDV*
016406,000046: 22,2761 05002 ANGLTIME
016407,000047: 22,2762 04772 ARATE,1
016408,000048: 22,2763 77661 SR
016409,000049: 22,2764 20606 5
016410,000050: 22,2765 03333 STORE TM # MANEUVER EXECUTION TIME SCALED AS T2
016411,000051: 22,2766 77614 SETGO
016412,000052: 22,2767 01035 CALCMAN2 # 0(OFF) = CONTINUE MANEUVER
016413,000053: 22,2770 45010 NEWANGL +1 # 1(ON) = START MANEUVER
016414,000054: # THE FOUR SELECTABLE FREE FALL MANEUVER RATES SELECTED BY
016415,000055: # LOADING RATEINDX WITH 0,2,4,6, RESPECTIVELY
016416,000056:
016417,000057:
016418,000058: 22,2771 00221 24255 ARATE 2DEC .0088888888 # = 0.2 DEG/SEC $ 22.5 DEG/SEC
016419,000059: 22,2773 00554 02660 2DEC .0222222222 # = 0.5 DEG/SEC $ 22.5 DEG/SEC
016420,000060: 22,2775 02660 13301 2DEC .0888888888 # = 2.0 DEG/SEC $ 22.5 DEG/SEC
016421,000061: 22,2777 16161 30707 2DEC .4444444444 # = 10.0 DEG/SEC $ 22.5 DEG/SEC
016422,000062:
016423,000063: 22,3001 00003 04000 ANGLTIME 2DEC .0001907349 # = 100B-19 FUDGE FACTOR TO CONVERT
016424,000064: # MANEUVER ANGLE TO MANEUVER TIME
End of include-file GIMBAL_LOCK_AVOIDANCE.agc. Parent file is MAIN.agc