SYSTEM TEST STANDARD LEAD INS

Scanned pages: 370-372
# Copyright:  Public domain.
# Filename:  SYSTEM_TEST_STANDARD_LEAD_INS.agc
# Purpose:   Part of the source code for Luminary 1A build 099.
#    It is part of the source code for the Lunar Module's (LM)
#    Apollo Guidance Computer (AGC), for Apollo 11.
# Assembler:  yaYUL
# Contact:  Ron Burkey <info@sandroid.org>.
# Website:  www.ibiblio.org/apollo.
# Pages:  370-372
# Mod history:  2009-05-17 RSB  Adapted from the corresponding
#        Luminary131 file, using page
#        images from Luminary 1A.
#
# This source code has been transcribed or otherwise adapted from
# digitized images of a hardcopy from the MIT Museum.  The digitization
# was performed by Paul Fjeld, and arranged for by Deborah Douglas of
# the Museum.  Many thanks to both.  The images (with suitable reduction
# in storage size and consequent reduction in image quality as well) are
# available online at www.ibiblio.org/apollo.  If for some reason you
# find that the images are illegible, contact me at info@sandroid.org
# about getting access to the (much) higher-quality images which Paul
# actually created.
#
# Notations on the hardcopy document read, in part:
#
#  Assemble revision 001 of AGC program LMY99 by NASA 2021112-061
#  16:27 JULY 14, 1969

# Page 370
    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 TO 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 371
# 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 372
# 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 AND 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