Source Code
|
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.
|
020617,000002: ## Copyright: Public domain.
020618,000003: ## Filename: RADAR_LEADIN_ROUTINES.agc
020619,000004: ## Purpose: A section of Luminary revision 96.
020620,000005: ## It is part of the reconstructed source code for the
020621,000006: ## original release of the flight software for the Lunar
020622,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
020623,000008: ## The code has been recreated from a previously reconstructed
020624,000009: ## copy of Luminary 97 by undoing changes described in anomaly
020625,000010: ## report LNY-59. The code has been adapted such that the
020626,000011: ## resulting bugger words exactly match those specified for
020627,000012: ## Luminary 96 in NASA drawing 2021152D, which gives relatively
020628,000013: ## high confidence that the reconstruction is correct.
020629,000014: ## Reference: pp. 490-491
020630,000015: ## Assembler: yaYUL
020631,000016: ## Contact: Ron Burkey <info@sandroid.org>.
020632,000017: ## Website: www.ibiblio.org/apollo/index.html
020633,000018: ## Mod history: 2019-08-04 MAS Created from Luminary 97.
020634,000019:
|
|
Page 490
|
020636,000021: 25,2003 BANK 25
020637,000022: 25,2000 SETLOC RRLEADIN
020638,000023: 25,2000 BANK
020639,000024:
020640,000025: 25,2003 E4,1600 EBANK= RSTACK
020641,000026:
020642,000027: # RADAR SAMPLING LOOP.
020643,000028:
020644,000029: 25,2003 COUNT* $$/RLEAD
020645,000030: 25,2003 11755 RADSAMP CCS RSAMPDT # TIMES NORMAL ONCE-PER-SECOND SAMPLING.
020646,000031: 25,2004 12006 TCF +2
020647,000032: 25,2005 15261 TCF TASKOVER # +0 INSERTED MANUALLY TERMINATES TEST.
020648,000033:
020649,000034: 25,2006 05203 TC WAITLIST
020650,000035: 25,2007 E4,1600 EBANK= RSTACK
020651,000036: 25,2007 02003 52064 2CADR RADSAMP
020652,000037:
020653,000038: 25,2011 37713 CAF PRIO25
020654,000039: 25,2012 05072 TC NOVAC
020655,000040: 25,2013 E4,1600 EBANK= RSTACK
020656,000041: 25,2013 02023 52064 2CADR DORSAMP
020657,000042:
020658,000043: 25,2015 34736 CAF BIT14 # FOR CYCLIC SAMPLING, RTSTDEX=
020659,000044: 25,2016 00006 EXTEND # RTSTLOC/2 + RTSTBASE
020660,000045: 25,2017 71754 MP RTSTLOC
020661,000046: 25,2020 61753 AD RTSTBASE # 0 FOR RR, 2 FOR LR.
020662,000047: 25,2021 55751 TS RTSTDEX
020663,000048: 25,2022 15261 TCF TASKOVER
020664,000049:
020665,000050: # DO THE ACTUAL RADAR SAMPLE.
020666,000051:
020667,000052: 25,2023 02047 DORSAMP TC VARADAR # SELECTS VARIABLE RADAR CHANNEL.
020668,000053: 25,2024 04616 TC BANKCALL
020669,000054: 25,2025 17714 CADR RADSTALL
020670,000055:
020671,000056: 25,2026 25756 INCR RFAILCNT # ADVANCE FAIL COUNTER BUT ACCEPT BAD DATA
020672,000057:
020673,000058: 25,2027 00004 DORSAMP2 INHINT
020674,000059: 25,2030 30101 CA FLAGWRD5 # DON'T UPDATE RSTACK IF IN R77.
020675,000060: 25,2031 74741 MASK R77FLBIT
020676,000061: 25,2032 10000 CCS A
020677,000062: 25,2033 12037 TCF +4
020678,000063:
020679,000064: 25,2034 53102 DXCH SAMPLSUM
020680,000065: 25,2035 51754 INDEX RTSTLOC
020681,000066: 25,2036 53601 DXCH RSTACK
020682,000067:
020683,000068: 25,2037 41754 CS RTSTLOC # CYCLE RTSTLOC.
020684,000069: 25,2040 61752 AD RTSTMAX
020685,000070: 25,2041 00006 EXTEND
020686,000071:
|
|
Page 491
|
020688,000073: 25,2042 12045 BZF +3
020689,000074: 25,2043 31754 CA RTSTLOC
020690,000075: 25,2044 64752 AD TWO # STORAGE IS DP
020691,000076: 25,2045 55754 TS RTSTLOC
020692,000077: 25,2046 15155 TCF ENDOFJOB # CONTINUOUS SAMPLING AND 2N TRIES - GONE.
020693,000078:
020694,000079: # VARIABLE RADAR DATA CALLER FOR ONE MEASUREMENT ONLY.
020695,000080:
020696,000081: 25,2047 34753 VARADAR CAF ONE # WILL BE SENT TO RADAR ROUTINE IN A BY
020697,000082: 25,2050 54133 TS BUF2 # SWCALL.
020698,000083: 25,2051 51751 INDEX RTSTDEX
020699,000084: 25,2052 32054 CAF RDRLOCS
020700,000085: 25,2053 14622 TCF SWCALL # NOT TOUCHING Q.
020701,000086:
020702,000087: 25,2054 53105 RDRLOCS CADR RRRANGE # = 0
020703,000088: 25,2055 53103 CADR RRRDOT # = 1
020704,000089: 25,2056 53101 CADR LRVELX # = 2
020705,000090: 25,2057 53077 CADR LRVELY # = 3
020706,000091: 25,2060 53075 CADR LRVELZ # = 4
020707,000092: 25,2061 53073 CADR LRALT # = 5
020708,000093:
020709,000094:
End of include-file RADAR_LEADIN_ROUTINES.agc. Parent file is MAIN.agc