126 lines
3.5 KiB
Plaintext
126 lines
3.5 KiB
Plaintext
# Copyright: Public domain.
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# Filename: SYSTEM_TEST_STANDARD_LEAD_INS.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: 370-372
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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 370
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EBANK= XSM
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BANK 33
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SETLOC E/PROG
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BANK
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COUNT* $$/P07
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# SPECIAL PROGRAMS TO EASE THE PANGS OF ERASABLE MEMORY PROGRAMS.
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#
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# E/BKCALL FOR DOING BANKCALLS FROM AND RETURNING TO ERASABLE.
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#
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# THIS ROUTINE IS CALLABLE FROM ERASABLE OR FIXED. LIKE BANKCALL, HOWEVER, SWITCHING BETWEEN S3 AND S4
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# IS NOT POSSIBLE.
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#
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# THE CALLING SEQUENCE IS
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#
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# TC BANKCALL
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# CADR E/BKCALL
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# CADR ROUTINE # WHERE TO WANT TO GO IN FIXED.
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# RETURN HERE FROM DISPLAY TERMINATE, BAD STALL OR TC Q.
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# RETURN HERE FROM DISPLAY PROCEED OR GOOD RETURN FROM STALL.
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# RETURN HERE FROM DISPLAY ENTER OR RECYCLE.
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#
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# THIS ROUTINE REQUIRES TWO ERASABLES (EBUF2, +1) IN UNSWITCHED WHICH ARE UNSHARED BY INTERRUPTS AND
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# OTHER EMEMORY PROGRAMS.
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#
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# A + L ARE PRESERVED THROUGH BANKCALL AND E/BKCALL.
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E/BKCALL DXCH BUF2 # SAVE A,L AND GET DP RETURN
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DXCH EBUF2 # SAVE DP RETURN.
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INCR EBUF2 # RETURN +1 BECAUSE DOUBLE CADR.
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CA BBANK
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MASK LOW10 # GET CURRENT EBANK. (SBANK SOMEDAY)
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ADS EBUF2 +1 # FORM BBCON. (WAS FBANK)
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NDX EBUF2
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CA 0 -1 # GET CADR OF ROUTINE.
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TC SWCALL # GO TO ROUTINE, SETTING Q TO SWRETURN
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# AND RESTORING A + L.
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TC +4 # TX Q, V34, OR BAD STALL RETURN.
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TC +2 # PROCEED OR GOOD STALL RETURN.
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INCR EBUF2 # ENTER OR RECYCLE RETURN
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INCR EBUF2
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E/SWITCH DXCH EBUF2
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DTCB
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# Page 371
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# E/CALL FOR CALLING A FIXED MEMORY INTERPRETIVE SUBROUTINE FROM ERASABLE AND RETURNING TO ERASABLE.
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#
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# THE CALLING SEQUENCE IS...
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#
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# RTB
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# E/CALL
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# CADR ROUTINE # THE INTERPRETIVE SUBROUTINE YOU WANT
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# # RETURNS HERE IN INTERPRETIVE.
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E/CALL LXCH LOC # ADRES -1 OF CADR.
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INDEX L
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CA L # CADR IN A.
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INCR L
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INCR L # RETURN ADRES IN L.
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DXCH EBUF2 # STORE CADR AND RETURN
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TC INTPRET
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CALL
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EBUF2 # INDIRECTLY EXECUTE ROUTING. IT MUST
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EXIT # LEAVE VIA RVQ OR EQUIVALENT.
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LXCH EBUF2 +1 # PICK UP RETURN.
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TCF INTPRET +2 # SET LOC AND RETURN TO CALLER.
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# Page 372
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# E/JOBWAK FOR WAKING UP ERASABLE MEMORY JOBS.
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#
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# THIS ROUTINE MUST BE CALLED IN INTERRUPT OR WITH INTERRUPTS INHIBITED.
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#
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# THE CALLING SEQUENCE IS
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#
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# INHINT
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# ...
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# CA WAKEADR # ADDRESS OF SLEEPING JOB
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# TC IBNKCALL
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# CADR E/JOBWAK
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# ... # RETURNS HERE
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# RELINT # IF YOU DID AND INHINT
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BANK 33
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SETLOC E/PROG
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BANK
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COUNT* $$/P07
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E/JOBWAK TC JOBWAKE # ARRIVE WITH ADRES IN A.
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CS BIT11
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NDX LOCCTR
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ADS LOC # KNOCK FIXED MEMORY BIT OUT OF ADRES.
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TC RUPTREG3 # RETURN
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