# Copyright: Public domain. # Filename: RESTART_TABLES.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: 238-243 # Mod history: 2009-05-10 SN (Sergio Navarro). Started adapting # from the Luminary131/ file of the same # name, using Luminary099 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 238 # RESTART TABLES # ------------------ # # THERE ARE TWO FORMS OF RESTART TABLES FOR EACH GROUP. THEY ARE KNOWN AS THE EVEN RESTART TABLES AND THE ODD # RESTART TABLES. THE ODD TABLES HAVE ONLY ONE ENTRY OF THREE LOCATIONS WHILE THE EVEN TABLES HAVE TWO ENTRIES # EACH USING THREE LOCATIONS. THE INFORMATION AS TO WHETHER IT IS A JOB, WAITLIST, OR A LONGCALL IS GIVEN BY THE # WAY THINGS ARE PUT INTO THE TABLES. # A JOB HAS ITS PRIORITY STORED IN PRDTTAB OF THE CORRECT PHASE SPOT - A POSITIVE PRIORITY INDICATES A # FINDVAC JOB, A NEGATIVE PRIORITY A NOVAC. THE 2CADR OF THE JOB IS STORED IN THE CADRTAB. # FOR EXAMPLE, # # 5.7SPOT OCT 23000 # 2CADR SOMEJOB # # A RESTART OF GROUP 5 WITH PHASE SEVEN WOULD THEN CAUSE SOMEJOB TO BE RESTARTED AS A FINDVAC WITH PRIORITY 23. # # 5.5SPOT OCT -23000 # 2CADR ANYJOB # # HERE A RESTART OF GROUP 5 WITH PHASE 7 WOULD CAUSE ANYJOB TO BE RESTARTED AS A NOVAC WITH PRIORITY 23. # A LONGCALL HAS ITS GENADR OF ITS 2CADR STORED NEGATIVELY AND ITS BBCON STORED POSITIVELY. IN ITS PRDTTAB IS # PLACED THE LOCATION OF A DP REGISTER THAT CONTAINS THE DELTA TIME THAT LONGCALL HAD BEEN ORIGINALLY STARTED # WITH. EXAMPLE, # # 3.6SPOT GENADR DELTAT # -GENADR LONGTASK # BBCON LONGTASK # # OCT 31000 # 2CADR JOBAGAIN # # THIS WOULD START UP LONGTASK AT THE APPROPRIATE TIME, OR IMMEDIATELY IF THE TIME HAD ALREADY PASSED. IT SHOULD # BE NOTED THAT IF DELTAT IS IN A SWITCHED E BANK, THIS INFORMATOIN SHOULD BE IN THE BBCON OFTHE 2CADR OF THE # TASK. FROM ABOVE, WE SEE THAT THE SECOND PART OF THIS PHASE WOULD BE STARTED AS A JOB WITH A PRIORITY OF 31. # # WAITLIST CALLS ARE IDENTIFIED BY THE FACT THAT THEIR 2CADR IS STORED NEGATIVELY. IF PRDTTAB OF THE PHASE SPOT # IS POSITIVE, THEN IT CONTAINS THE DELTA TIME, IF PRDTTAB IS NEGATIVE THEN IT IS THE -GENADR OF AN ERASABLE # LOCATION CONTAINING THE DELTA TIME, THAT IS, THE TIME IS STORED INDIRECTLY. IT SHOULD BE NOTED AS ABOVE, THAT # IF THE TIME IS STORED INDIRECTLY, THE BBCON MUST CONTAIN THE NECESSARY E BANK INFORMATION IF APPLICABLE. WITH # WAITLIST WE HAVE ONE FURTHER OPTION, IF -0 IS STORED IN PRDTTAB, IT WILL CAUSE AN IMMEDIATE RESTART OF THE # TASK. EXAMPLES, # # OCT 77777 # THIS WILL CAUSE AN IMMEDIATE RESTART # -2CADR ATASK # OF THE TASK :ATASK: # # DEC 200 # IF THE TIME OF THE 2 SECONDS SINCE DUMMY # -2CADR DUMMY # WAS PUT ON THE WAITLIST IS UP, IT WILL BEGIN # # IN 10 MS, OTHERWISE IT WILL BEGIN WHEN # # IT NORMALLY WOULD HAVE BEGUN. # Page 239 # -GENADR DTIME # WHERE DTIME CONTAINS THE DELTA TIME # -2CADR TASKTASK # OTHERWISE THIS IS AS ABOVE # # ***** NOW THE TABLES THEMSELVES *****
BANK01 SETLOC RESTART BANK
PRDTTAB EQUALS12000# USED TO FIND THE PRIORITY OR DELTATIME
CADRTAB EQUALS12001# THIS AND THE NEXT RELATIVE LOC CONTAIN # RESTART 2CADR
COUNT* $$/RSTAB # TABLES IN BANK 1.
SIZETAB TC1.2SPOT -12006 TC1.3SPOT -12004 TC2.2SPOT -12006 TC2.3SPOT -12004 TC3.2SPOT -12006 TC3.3SPOT -12004 TC4.2SPOT -12006 TC4.3SPOT -12004 TC5.2SPOT -12006 TC5.3SPOT -12004 TC6.2SPOT -12006 TC6.3SPOT -12004 1.2SPOT OCT21000# A DUMMY EXAMPLE TO BE REPLACED AS SOON EBANK= STATE 2CADR ENDOFJOB # AS THERE IS A LEGITIMATE 1.2SPOT
DEC100 EBANK= STATE 2CADR TASKOVER
# ANY MORE GROUP 1.EVEN RESTART VALUES SHOULD GO HERE
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