https://github.com/virtualagc/virtualagc
Tip revision: 4e5d304eb7cd5589b924ffb8b423b6f15511b35d authored by Ron Burkey on 20 October 2018, 17:47:00 UTC
The sample Block I AGC program TRIVIUM, found at the very end of one of
The sample Block I AGC program TRIVIUM, found at the very end of one of
Tip revision: 4e5d304
SYSTEM_TEST_STANDARD_LEAD_INS.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: SYSTEM_TEST_STANDARD_LEAD_INS.agc
## Purpose: A section of Luminary 1C, revision 131.
## It is part of the source code for the Lunar Module's (LM)
## Apollo Guidance Computer (AGC) for Apollo 13.
## This file is intended to be a faithful transcription, except
## that the code format has been changed to conform to the
## requirements of the yaYUL assembler rather than the
## original YUL assembler.
## Reference: pp. 372-374
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 05/11/03 RSB. Began transcribing.
## 05/14/05 RSB Corrected website reference above.
## 2017-01-06 RSB Page numbers now agree with those on the
## original harcopy, as opposed to the PDF page
## numbers in 1701.pdf.
## 2017-02-23 RSB Proofed comment text using octopus/ProoferComments.
## Page 372
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 373
# 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 374
# 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