2016-07-07 08:47:26 +00:00
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# Copyright: Public domain.
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# Filename: P70-P71.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: Hartmuth Gutsche <hgutsche@xplornet.com>.
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# Website: www.ibiblio.org/apollo.
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# Pages: 829-837
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# Mod history: 2009-05-23 HG Transcribed from page images.
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# 2009-06-05 RSB Fixed a typo.
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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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2016-12-28 16:11:25 +00:00
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# 16:27 JULY 14, 1969
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2016-07-07 08:47:26 +00:00
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# Page 829
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BANK 21
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SETLOC R11
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BANK
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EBANK= DVCNTR
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COUNT* $$/R11
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R10,R11 CS FLAGWRD7 # IS SERVICER STILL RUNNING?
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MASK AVEGFBIT
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CCS A
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TCF TASKOVER # LET AVGEND TAKE CARE OF GROUP 2.
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CCS PIPCTR
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TCF +2
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TCF LRHTASK # LAST PASS. CALL LRHTASK.
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+2 TS PIPCTR1
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PIPCTR1 = LADQSAVE
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PIPCTR = PHSPRDT2
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CAF OCT31
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TC TWIDDLE
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ADRES R10,R11
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2016-07-31 19:33:19 +00:00
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R10,R11A CS IMODES33 # IF LAMP TEST, DO NOT CHANGE LR LITES.
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2016-07-07 08:47:26 +00:00
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MASK BIT1
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EXTEND
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BZF 10,11
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FLASHH? MASK FLGWRD11 # C(A) = 1 - HFLASH BIT
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EXTEND
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BZF FLASHV? # H FLASH OFF, SO LEAVE ALONE
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CA HLITE
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TS L
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TC FLIP # FLIP H LITE
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FLASHV? CA VFLSHBIT # VLASHBIT MUST BE BIT 2.
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MASK FLGWRD11
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EXTEND
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BZF 10,11 # V FLASH OFF
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CA VLITE
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TS L
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TC FLIP # FLIP V LITE
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10,11 CA FLAGWRD9 # IS THE LETABORT FLAG SET ?
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MASK LETABBIT
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EXTEND
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BZF LANDISP # NO. PROCEED TO R10.
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P71NOW? CS MODREG # YES. ARE WE IN P71 NOW?
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# Page 830
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AD 1DEC71
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EXTEND
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BZF LANDISP # YES. PROCEED TO R10.
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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EXTEND # NO. IS AN ABORT STAGE COMMANDED?
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READ CHAN30
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COM
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TS L
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MASK BIT4
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CCS A
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TCF P71A # YES.
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P70NOW? CS MODREG # NO. ARE WE IN P70 NOW?
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AD 1DEC70
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EXTEND
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BZF LANDISP # YES. PROCEED TO R10.
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CA L # NO. IS AN ABORT COMMANDED?
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MASK BIT1
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CCS A
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TCF P70A # YES.
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TCF LANDISP # NO. PROCEED TO R10.
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COUNT* $$/P70
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P70 TC LEGAL?
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P70A CS ZERO
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TCF +3
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P71 TC LEGAL?
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P71A CAF TWO
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+3 TS Q
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INHINT
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EXTEND
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DCA CNTABTAD
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DTCB
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EBANK= DVCNTR
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CNTABTAD 2CADR CONTABRT
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1DEC70 DEC 70
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1DEC71 DEC 71
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BANK 05
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SETLOC ABORTS1
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BANK
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COUNT* $$/P70
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CONTABRT CAF ABRTJADR
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TS BRUPT
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RESUME
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# Page 831
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ABRTJADR TCF ABRTJASK
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ABRTJASK CAF OCTAL27
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AD Q
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TS L
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COM
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DXCH -PHASE4
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INDEX Q
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CAF MODE70
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TS MODREG
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TS DISPDEX # INSURE DISPDEX IS POSITIVE.
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CCS Q # SET APSFLAG IF P71.
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CS FLGWRD10 # SET APSFLAG PRIOR TO THE ENEMA.
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MASK APSFLBIT
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ADS FLGWRD10
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CS DAPBITS # DAPBITS = OCT 640 = BITS 6, 8, 9
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MASK DAPBOOLS # (TURN OFF ULLAGE, DRIFT, AND XOVINHIB
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TS DAPBOOLS
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CS FLAGWRD5 # SET ENGONFLG.
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MASK ENGONBIT
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ADS FLAGWRD5
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CS PRIO30 # INSURE THAT THE ENGINE IS ON, IF ARMED.
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EXTEND
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RAND DSALMOUT
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AD BIT13
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EXTEND
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WRITE DSALMOUT
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CAF LRBYBIT # TERMINATE R12.
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TS FLGWRD11
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CS FLAGWRD0 # SET R10FLAG TO SUPPRESS OUTPUTS TO THE
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MASK R10FLBIT # CROSS-POINTER DISPLAY.
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ADS FLAGWRD0 # THE FOLLOWING ENEMA WILL REMOVE THE
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# DISPLAY INERTIAL DATA OUTBIT.
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TC CLRADMOD # INSURE RADMODES PROPERLY SET FOR R29.
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EXTEND # LOAD TEVENT FOR THE DOWNLINK.
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DCA TIME2
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DXCH TEVENT
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EXTEND
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DCA SVEXITAD
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DXCH AVGEXIT
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# Page 832
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EXTEND
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DCA NEG0
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DXCH -PHASE1
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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EXTEND
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DCA NEG0
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DXCH -PHASE3
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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EXTEND
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DCA NEG0
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DXCH -PHASE6
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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CAF THREE # SET UP 4.3SPOT FOR GOABORT
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TS L
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COM
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DXCH -PHASE4
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# the 3 in OCT37774 could be something else, garbled
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2016-12-28 16:11:25 +00:00
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CAF OCT37774 # SET T5RUPT TO CALL DAPIDLER IN
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2016-07-07 08:47:26 +00:00
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TS TIME5 # 40 MILLISECONDS.
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC POSTJUMP
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CADR ENEMA
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EBANK= DVCNTR
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SVEXITAD 2CADR SERVEXIT
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MODE70 DEC 70
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OCTAL27 OCT 27
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MODE71 DEC 71
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DAPBITS OCT 00640
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BANK 32
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SETLOC ABORTS
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BANK
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COUNT* $$/P70
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GOABORT TC INTPRET
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CALL
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INITCDUW
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EXIT
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CAF FOUR
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TS DVCNTR
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CAF WHICHADR
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TS WHICH
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TC DOWNFLAG
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ADRES FLRCS
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# Page 833
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TC DOWNFLAG
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ADRES FLUNDISP
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC DOWNFLAG
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ADRES IDLEFLAG
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2016-12-28 16:11:25 +00:00
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2016-07-08 10:45:31 +00:00
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TC UPFLAG # INSURE 4-JET TRANSLATION CAPABILITY.
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2016-07-07 08:47:26 +00:00
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ADRES ACC4-2FL
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC CHECKMM
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70DEC DEC 70
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TCF P71RET
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P70INIT TC INTPRET
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CALL
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TGOCOMP
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DLOAD SL
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MDOTDPS
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4D
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BDDV
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MASS
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STODL TBUP
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MASS
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DDV SR1
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K(1/DV)
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STORE 1/DV1
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STORE 1/DV2
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STORE 1/DV3
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BDDV
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K(AT)
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STODL AT
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DTDECAY
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DCOMP SL
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11D
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STORE TTO
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SLOAD DCOMP
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DPSVEX
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SR2
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STORE VE # INITIALIZE DPS EXHAUST VELOCITY
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SET CALL
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FLAP
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COMMINIT
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AXC,1 GOTO # RETURN HERE IN P70, SET X1 FOR DPS COEFF.
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0D
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BOTHPOLY
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INJTARG AXC,1 # RETURN HERE IN P71, SET X1 FOR APS COEFF.
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8D
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BOTHPOLY DLOAD* DMP # TGO D
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ABTCOF,1
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TGO
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# Page 834
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DAD* DMP
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ABTCOF +2,1 # TGO(C+TGO )
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TGO
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DAD* DMP
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ABTCOF +4,1 # TGO(B+TGO d))
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TGO
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DAD*
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2016-12-28 16:11:25 +00:00
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ABTCOF +6,1 # A+TGO(B+TGO(C+TGO D))
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2016-07-07 08:47:26 +00:00
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STORE ZDOTD # STORE TENTATIVELY IN ZDOTD
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DSU BPL # CHECK AGAINST MINIMUM
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VMIN
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UPRATE # IF BIG ENOUGH, LEAVE ZDOTD AS IS .
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DLOAD
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VMIN
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STORE ZDOTD # IF TOO SMALL, REPLCAE WITH MINIMUM.
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UPRATE DLOAD
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ABTRDOT
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STCALL RDOTD # INITIALZE RDOTD.
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YCOMP # COMPUTE Y
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ABS DSU
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YLIM # /Y/-DYMAX
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BMN SIGN # IF <0, XR<.5DEG, LEAVE YCO AT 0
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YOK # IF >0, FIX SIGN OF DEFICIT. THIS IS YCO.
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Y
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STORE YCO
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YOK DLOAD DSU
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YCO
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Y # COMPUTE XRANGE IN CASE ASTRONAUT WANTS
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SR
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5D
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STORE XRANGE # TO LOOK.
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UPTHROT SET EXIT
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FLVR
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC UPFLAG # SET ROTFLAG
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ADRES ROTFLAG
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC THROTUP
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TC PHASCHNG
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OCT 04024
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2016-12-28 16:11:25 +00:00
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-3 TC BANKCALL # VERIFY THAT THE PANEL SWITCHES
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2016-07-07 08:47:26 +00:00
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CADR P40AUTO # ARE PROPERLY SET.
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2016-12-28 16:11:25 +00:00
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2016-07-07 08:47:26 +00:00
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TC THROTUP
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UPTHROT1 EXTEND # SET SERVICER TO CALL ASCENT GUIDANCE.
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DCA ATMAGAD
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DXCH AVGEXIT
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# Page 835
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GRP4OFF TC PHASCHNG # TERMINATE USE OF GROUP 4.
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OCT 00004
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TCF ENDOFJOB
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P71RET TC DOWNFLAG
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ADRES LETABORT
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CAF THRESH2 # SET DVMON THRESHOLD TO THE ASCENT VALUE.
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TS DVTHRUSH
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TC INTPRET
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BON CALL
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FLAP
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OLDTIME
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TGOCOMP # IF FLAP=0, TGO=T-TIG
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SSP GOTO
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QPRET
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CADR INJTARG
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P12INIT # WILL EXIT P12INIT TO INJTARG
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OLDTIME DLOAD SL1 # IF FLAP=1,GTO=2 TGO
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TGO
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STCALL TGO1
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P12INIT
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EXIT
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TC PHASCHNG
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OCT 04024
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EXTEND
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DCA TGO1
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DXCH TGO
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TCF UPTHROT1 -3
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TGO1 = VGBODY
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# *************************************************************************
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BANK 21
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SETLOC R11
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BANK
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COUNT* $$/P70
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LEGAL? CS MMNUMBER # IS THE DESIRED PGM ALREADY IN PROGRESS?
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AD MODREG
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EXTEND
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BZF ABORTALM
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CS FLAGWRD9 # ARE THE ABORTS ENABLED?
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MASK LETABBIT
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CCS A
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# Page 836
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TCF ABORTALM
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CA FLAGWRD7 # IS SERVICER ON THE AIR?
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MASK AVEGFBIT
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CCS A
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TC Q # YES. ALL IS WELL.
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ABORTALM TC FALTON
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TC RELDSP
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TC POSTJUMP
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CADR PINBRNCH
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BANK 32
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SETLOC ABORTS
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BANK
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COUNT* $$/P70
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# **********************************************************************
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TGOCOMP RTB DSU
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LOADTIME
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TIG
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SL
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11D
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STORE TGO
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RVQ
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# ************************************************************************
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|
THROTUP CAF BIT13
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TS THRUST
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CAF BIT4
|
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EXTEND
|
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|
WOR CHAN14
|
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|
TC Q
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|
# ************************************************************************
|
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|
10SECS 2DEC 1000
|
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|
|
HINJECT 2DEC 18288 B-24 # 60,000 FEET EXPRESSED IN METERS.
|
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|
|
(TGO)A 2DEC 37000 B-17
|
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|
|
K(AT) 2DEC .02 # SCALING CONSTANT
|
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|
|
WHICHADR REMADR ABRTABLE
|
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|
# ************************************************************************
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|
# Page 837
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|
EBANK= DVCNTR
|
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|
|
ATMAGAD 2CADR ATMAG
|
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|
ORBMANAD ADRES ORBMANUV
|
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