https://github.com/virtualagc/virtualagc
Tip revision: a3413b73bcd332703a9619912e0a1a51bebf581b authored by Ron Burkey on 02 June 2023, 21:52:00 UTC
Lots of fixes to LVDC assembler; AS-512 errors down from ~10K to <5K.
Lots of fixes to LVDC assembler; AS-512 errors down from ~10K to <5K.
Tip revision: a3413b7
SYSTEM_TEST_STANDARD_LEAD_INS.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: SYSTEM_TEST_STANDARD_LEAD_INS.agc
## Purpose: A section of LUM69 revision 2.
## It is part of the reconstructed source code for the flown
## version of the flight software for the Lunar Module's (LM)
## Apollo Guidance Computer (AGC) for Apollo 10. The code has
## been recreated from a copy of Luminary revsion 069, using
## changes present in Luminary 099 which were described in
## Luminary memos 75 and 78. The code has been adapted such
## that the resulting bugger words exactly match those specified
## for LUM69 revision 2 in NASA drawing 2021152B, which gives
## relatively high confidence that the reconstruction is correct.
## Reference: pp. 383-385
## Assembler: yaYUL
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 2019-07-27 MAS Created from Luminary 69.
## Page 383
EBANK= XSM
BANK 33
SETLOC E/PROG
BANK
COUNT* $$/P07
# SPECIAL PROGRAMS TO EASE THE PANGS OF ERASABLE MEMORY PROGRAMS.
#
# E/BKCALL FOR DOING BANKCALLS FROM AND RETURNING TO ERASABLE.
#
# THIS ROUTINE IS CALLABLE FROM ERASABLE OR FIXED. LIKE BANKCALL, HOWEVER, SWITCHING BETWEEN S3 AND S4
# IS NOT POSSIBLE.
#
# THE CALLING SEQUENCE IS:
#
# TC BANKCALL
# CADR E/BKCALL
# CADR ROUTINE WHERE YOU WANT TO GO IN FIXED.
# RETURN HERE FROM DISPLAY TERMINATE, BAD STALL OR TC Q.
# RETURN HERE FROM DISPLAY PROCEED OR GOOD RETURN FROM STALL.
# RETURN HERE FROM DISPLAY ENTER OR RECYCLE.
#
# THIS ROUTINE REQUIRES TWO ERASABLES (EBUF2, +1) IN UNSWITCHED WHICH ARE UNSHARED BY INTERRUPTS AND
# OTHER EMEMORY PROGRAMS.
#
# A + L ARE PRESERVED THROUGH BANKCALL AND E/BKCALL.
E/BKCALL DXCH BUF2 # SAVE A,L AND GET DP RETURN.
DXCH EBUF2 # SAVE DP RETURN.
INCR EBUF2 # RETURN +1 BECAUSE DOUBLE CADR.
CA BBANK
MASK LOW10 # GET CURRENT EBANK. (SBANK SOMEDAY)
ADS EBUF2 +1 # FORM BBCON. (WAS FBANK)
NDX EBUF2
CA 0 -1 # GET CADR OF ROUTINE.
TC SWCALL # GO TO ROUTINE, SETTING Q TO SWRETURN
# AND RESTORING A + L.
TC +4 # TX Q, V34, OR BAD STALL RETURN.
TC +2 # PROCEED OR GOOD STALL RETURN.
INCR EBUF2 # ENTER OR RECYCLE RETURN.
INCR EBUF2
E/SWITCH DXCH EBUF2
DTCB
## Page 384
# E/CALL FOR CALLING A FIXED MEMORY INTERPRETIVE SUBROUTINE FROM ERASABLE AND RETURNING TO ERASABLE.
#
# THE CALLING SEQUENCE IS...
#
# RTB
# E/CALL
# CADR ROUTINE THE INTERPRETIVE SUBROUTINE YOU WANT.
# RETURNS HERE IN INTERPRETIVE.
E/CALL LXCH LOC # ADRES -1 OF CADR.
INDEX L
CA L # CADR IN A.
INCR L
INCR L # RETURN ADRES IN L.
DXCH EBUF2 # STORE CADR AND RETURN.
TC INTPRET
CALL
EBUF2 # INDIRECTLY EXECUTE ROUTINE. IT MUST
EXIT # LEAVE VIA RVQ OR EQUIVALENT.
LXCH EBUF2 +1 # PICK UP RETURN.
TCF INTPRET +2 # SET LOC AND RETURN TO CALLER.
## Page 385
# E/JOBWAK FOR WAKING UP ERASABLE MEMORY JOBS.
#
# THIS ROUTINE MUST BE CALLED IN INTERRUPT OR WITH INTERRUPTS INHIBITED.
#
# THE CALLING SEQUENCE IS:
#
# INHINT
# .
# .
# CA WAKEADR ADDRESS OF SLEEPING JOB
# TC IBNKCALL
# CADR E/JOBWAK
# . RETURNS HERE
# .
# .
# RELINT IF YOU DID AN INHINT.
BANK 33
SETLOC E/PROG
BANK
COUNT* $$/P07
E/JOBWAK TC JOBWAKE # ARRIVE IWTH ADRES IN A.
CS BIT11
NDX LOCCTR
ADS LOC # KNOCK FIXED MEMORY BIT OUT OF ADRES.
TC RUPTREG3 # RETURN