Pre-launch Review
RESTARTS ROUTINE
Scanned pages: 1303-1309
# Copyright: Public domain.# Filename: RESTARTS_ROUTINE.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: Onno Hommes <ohommes@cmu.edu>.# Website: www.ibiblio.org/apollo.# Pages: 1303-1309# Mod history: 2009-05-27 OH Transcribed from page images.## 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 1303 BANK 01 SETLOC RESTART BANK
EBANK= PHSNAME1 # GOPROG MUST SWITCH TO THIS EBANK
COUNT* $$/RSROURESTARTS CA MPAC +5 # GET GROUP NUMBER -1 DOUBLE # SAVE FOR INDEXING TS TEMP2G
CA PHS2CADR # SET UP EXIT IN CASE IT IS AN EVEN TS TEMPSWCH # TABLE PHASE
CA RTRNCADR # TO SAVE TIME ASSUME IT WILL GET NEXT TS GOLOC +2 # GROUP AFTER THIS
CA TEMPPHS MASK OCT1400 CCS A # IS IT A VARIABLE OR TABLE RESTART TCF ITSAVAR # IT:S A VARIABLE RESTART
GETPART2 CCS TEMPPHS # IS IT AN X.1 RESTART CCS A TCF ITSATBL # NO, ITS A TABLE RESTART
CA PRIO14 # IT IS AN X.1 RESTART, THEREFORE START TC FINDVAC # THE DISPLAY RESTART JOB EBANK= LST1 2CADR INITDSP
TC RTRNCADR # FINISHED WITH THIS GROUP, GET NEXT ONE
ITSAVAR MASK OCT1400 # IS IT TYPE B ? CCS A TCF ITSLIKEB # YES,IT IS TYPE B
EXTEND # STORE THE JOB (OR TASK) 2CADR FOR EXIT NDX TEMP2G DCA PHSNAME1 DXCH GOLOC
CA TEMPPHS # SEE IF THIS IS A JOB, TASK, OR A LONGCAL MASK OCT7 AD MINUS2 CCS A TCF ITSLNGCL # ITS A LONGCALL
RTRNCADR TC SWRETURN # CANT GET HERE# Page 1304 TCF ITSAWAIT
TCF ITSAJOB # ITS A JOB
ITSAWAIT CA WTLTCADR # SET UP WAITLIST CALL TS GOLOC -1
NDX TEMP2G # DIRECTLY STORED CA PHSPRDT1TIMETEST CCS A # IS IT AN IMMEDIATE RESTART INCR A # NO. TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
TCF ITSINDIR # STORED INDIRECTLY
TCF IMEDIATE # IT WANTS AN IMMEDIATE RESTART
# ***** THIS MUST BE IN FIXED FIXED *****
BLOCK 02 SETLOC FFTAG2 BANK
COUNT* $$/RSROUITSINDIR LXCH GOLOC +1 # GET THE CORRECT E BANK IN CASE THIS IS LXCH BB # SWITCHED ERRASIBLE
NDX A # GET THE TIME INDIRECTLY CA 1
LXCH BB # RESTORE THE BB AND GOLOC LXCH GOLOC +1
TCF FINDTIME # FIND OUT WHEN IT SHOULD BEGIN
# ***** YOU MAY RETURN TO SWITCHED FIXED *****
BANK 01 SETLOC RESTART BANK
COUNT* $$/RSROUFINDTIME COM # MAKE NEGITIVE SINCE IT WILL BE SUBTRACTD TS L # AND SAVE NDX TEMP2G CS TBASE1 EXTEND SU TIME1 CCS A COM# Page 1305 AD OCT37776 AD ONE AD L CCS A CA ZERO TCF +2 TCF +1IMEDIATE AD ONE TC GOLOC -1ITSLIKEB CA RTRNCADR # TYPE B, SO STORE RETURN IN TS TEMPSWCH # TEMPSWCH IN CASE OF AN EVEN PHASE
CA PRT2CADR # SET UP EXIT TO GET TABLE PART OF THIS TS GOLOC +2 # VARIABLE TYPE OF PHASE
CA TEMPPHS # MAKE THE PHASE LOOK RIGHT FOR THE TABLE MASK OCT177 # PART OF THIS VARIABLE PHASE TS TEMPPHS
EXTEND NDX TEMP2G # OBTAIN THE JOB:S 2CADR DCA PHSNAME1 DXCH GOLOC
ITSAJOB NDX TEMP2G # NOW ADD THE PRIORITY AND LET:S GO CA PHSPRDT1CHKNOVAC TS GOLOC -1 # SAVE PRIO UNTIL WE SEE IF ITS EXTEND # A FINDVAC OR A NOVAC BZMF ITSNOVAC
CAF FVACCADR # POSITIVE, SET UP FINDVAC CALL. XCH GOLOC -1 # PICK UP PRIO, TC GOLOC -1 # AND GO
ITSNOVAC CAF NOVACADR # NEGATIVE, XCH GOLOC -1 # SET UP NOVAC CALL, COM # CORRECT PRIO, TC GOLOC -1 # AND GO
ITSATBL TS CYR # FIND OUT IF THE PHASE IS ODD OR EVEN CCS CYR TCF +1 # IT:S EVEN TCF ITSEVEN
CA RTRNCADR # IN CASE THIS IS THE SECOND PART OF A TS GOLOC +2 # TYPE B RESTART, WE NEED PROPER EXIT
CA TEMPPHS # SET UP POINTER FOR FINDING OUR PLACE IN TS SR # THE RESTART TABLES AD SR# Page 1306 NDX TEMP2G AD SIZETAB +1 TS POINTER
CONTBL2 EXTEND # FIND OUT WHAT:S IN THE TABLE NDX POINTER DCA CADRTAB # GET THE 2CADR
LXCH GOLOC +1 # STORE THE BB INFORMATION
CCS A # IS IT A JOB OR IS IT TIMED INCR A # POSITIVE. MUST BE A JOB TCF ITSAJOB2
INCR A # MUST BE EITHER A WAITLIST OR LONGCALL TS GOLOC # LET-S STORE THE CORRECT CADR
CA WTLTCADR # SET UP OUR EXIT TO WAITLIST TS GOLOC -1
CA GOLOC +1 # NOW FIND OUT IF IT IS A WAITLIST CALL MASK BIT10 # THIS SHOULD BE ONE IF WE HAVE -BB CCS A # FOR THAT MATTER SO SHOULD BE BITS 9,8,7, # 6,5, AND LAST BUT NOT LEAST (PERHAPS NOT # IN IMPORTANCE ANYWAY. BIT 4 TCF ITSWTLST # IT IS A WAITLIST CALL
NDX POINTER # OBTAIN THE ORIGINAL DELTA T CA PRDTTAB # ADDRESS FOR THIS LONGCALL
TCF ITSLGCL1 # NOW GO GET THE DELTA TIME
# ***** THIS MUST BE IN FIXED FIXED *****
BLOCK 02 SETLOC FFTAG2 BANK
COUNT* $$/RSROUITSLGCL1 LXCH GOLOC +1 # OBTAIN THE CORRECT E BANK LXCH BB LXCH GOLOC +1 # AND PRESERVE OUR E AND F BANKS
EXTEND # GET THE DELTA TIME NDX A DCA 0
LXCH GOLOC +1 # RESTORE OUR E AND F BANK LXCH BB # RESTORE THE TASKS E AND F BANKS LXCH GOLOC +1 # AND PRESERVE OUR L# Page 1307 TCF ITSLGCL2 # NOT LET:S PROCESS THIS LONGCALL
# ***** YOU MAY RETURN TO SWITCHED FIXED *****
BANK 01 SETLOC RESTART BANK
COUNT* $$/RSROUITSLGCL2 DXCH LONGTIME
EXTEND # CALCULATE TIME LEFT DCS TIME2 DAS LONGTIME EXTEND DCA LONGBASE DAS LONGTIME
CCS LONGTIME # FIND OUT HOW THIS SHOULD BE RESTARTED TCF LONGCLCL TCF +2 TCF IMEDIATE -3 CCS LONGTIME +1 TCF LONGCLCL NOOP # CAN:T GET HERE ********* TCF IMEDIATE -3 TCF IMEDIATE
LONGCLCL CA LGCLCADR # WE WILL GO TO LONGCALL TS GOLOC -1
EXTEND # PREPARE OUR ENTRY TO LONGCALL DCA LONGTIME TC GOLOC -1
ITSLNGCL CA WTLTCADR # ASSUME IT WILL GO TO WAITLIST TS GOLOC -1
NDX TEMP2G CS PHSPRDT1 # GET THE DELTA T ADDRESS
TCF ITSLGCL1 # NOW GET THE DELTA TIME
ITSWTLST CS GOLOC +1 # CORRECT THE BBCON INFORMATION TS GOLOC +1
NDX POINTER # GET THE DT AND FIND OUT IF IT WAS STORED CA PRDTTAB # DIRECTLY OR INDIRECTLY
TCF TIMETEST # FIND OUT HOW THE TIME IS STORED
# Page 1308ITSAJOB2 XCH GOLOC # STORE THE CADR
NDX POINTER # ADD THE PRIORITY AND LET:S GO CA PRDTTAB
TCF CHKNOVAC
ITSEVEN CA TEMPSWCH # SET UP FOR EITHER THE SECOND PART OF THE TS GOLOC +2 # TABLE, OR A RETURN FOR THE NEXT GROUP
NDX TEMP2G # SET UP POINTER FOR OUR LOCATION WITHIN CA SIZETAB # THE TABLE AD TEMPPHS # THIS MAY LOOK BAD BUT LET:S SEE YOU DO AD TEMPPHS # BETTER IN TIME OR NUMBERR OF LOCATIONS AD TEMPPHS TS POINTER
TCF CONTBL2 # NOW PROCESS WHAT IS IN THE TABLE
PHSPART2 CA THREE # SET THE POINTER FOR THE SECOND HALF OF ADS POINTER # THE TABLE
CA RTRNCADR # THIS WILL BE OUR LAST TIME THROUGH THE TS GOLOC +2 # EVEN TABLE , SO AFTER IT GET THE NEXT # GROUP TCF CONTBL2 # SO LET:S GET THE SECOND ENTRY IN THE TBL
TEMPPHS EQUALS MPACTEMP2G EQUALS MPAC +1POINTER EQUALS MPAC +2TEMPSWCH EQUALS MPAC +3GOLOC EQUALS VAC5 +20DMINUS2 EQUALS NEG2OCT177 EQUALS LOW7
PHS2CADR GENADR PHSPART2PRT2CADR GENADR GETPART2LGCLCADR GENADR LONGCALLFVACCADR GENADR FINDVACWTLTCADR GENADR WAITLISTNOVACADR GENADR NOVAC