104 lines
2.5 KiB
Plaintext
104 lines
2.5 KiB
Plaintext
# Copyright: Public domain.
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# Filename: RADAR_LEADIN_ROUTINES.agc
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# Purpose: Part of the source code for Luminary 1A build 099.
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# It is part of the source code for the Lunar Module's (LM)
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# Apollo Guidance Computer (AGC), for Apollo 11.
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# Assembler: yaYUL
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# Contact: Ron Burkey <info@sandroid.org>.
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# Website: www.ibiblio.org/apollo.
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# Pages: 490-491
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# Mod history: 2009-05-17 RSB Adapted from the corresponding
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# Luminary131 file, using page
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# images from Luminary 1A.
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#
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# This source code has been transcribed or otherwise adapted from
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# digitized images of a hardcopy from the MIT Museum. The digitization
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# was performed by Paul Fjeld, and arranged for by Deborah Douglas of
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# the Museum. Many thanks to both. The images (with suitable reduction
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# in storage size and consequent reduction in image quality as well) are
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# available online at www.ibiblio.org/apollo. If for some reason you
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# find that the images are illegible, contact me at info@sandroid.org
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# about getting access to the (much) higher-quality images which Paul
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# actually created.
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#
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# Notations on the hardcopy document read, in part:
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#
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# Assemble revision 001 of AGC program LMY99 by NASA 2021112-61
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# 16:27 JULY 14, 1969
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# Page 490
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BANK 25
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SETLOC RRLEADIN
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BANK
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EBANK= RSTACK
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# RADAR SAMPLING LOOP.
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COUNT* $$/RLEAD
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RADSAMP CCS RSAMPDT # TIMES NORMAL ONCE-PER-SECOND SAMPLING.
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TCF +2
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TCF TASKOVER # +0 INSERTED MANUALLY TERMINATES TEST.
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TC WAITLIST
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EBANK= RSTACK
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2CADR RADSAMP
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CAF PRIO25
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TC NOVAC
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EBANK= RSTACK
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2CADR DORSAMP
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CAF BIT14 # FOR CYCLIC SAMPLING, RTSTDEX =
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EXTEND # RTSTLOC/2 + RTSTBASE
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MP RTSTLOC
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AD RTSTBASE # 0 FOR RR, 2 FOR LR.
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TS RTSTDEX
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TCF TASKOVER
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# DO THE ACTUAL RADAR SAMPLE.
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DORSAMP TC VARADAR # SELECTS VARIABLE RADAR CHANNEL.
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TC BANKCALL
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CADR RADSTALL
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INCR RFAILCNT # ADVANCE FAIL COUNTER BUT ACCEPT BAD DATA
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DORSAMP2 INHINT
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CA FLAGWRD5 # DON'T UPDATE RSTACK IF IN R77.
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MASK R77FLBIT
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CCS A
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TCF +4
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DXCH SAMPLSUM
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INDEX RTSTLOC
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DXCH RSTACK
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CS RTSTLOC # CYCLE RTSTLOC.
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AD RTSTMAX
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EXTEND
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# Page 491
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BZF +3
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CA RTSTLOC
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AD TWO # STORAGE IS DP
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TS RTSTLOC
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TCF ENDOFJOB # CONTINUOUS SAMPLING AND 2N TRIES -- GONE.
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# VARIABLE RADAR DATA CALLER FOR ONE MEASUREMENT ONLY.
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VARADAR CAF ONE # WILL BE SENT TO RADAR ROUTINE IN A BY
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TS BUF2 # SWCALL
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INDEX RTSTDEX
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CAF RDRLOCS
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TCF SWCALL # NOT TOUCHING Q.
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RDRLOCS CADR RRRANGE # =0
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CADR RRRDOT # =1
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CADR LRVELX # =2
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CADR LRVELY # =3
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CADR LRVELZ # =4
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CADR LRALT # =5
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