Source Code

These source-code files are part of a reconstructed copy of Comanche 72/3 (AKA Manche72 revision 3), the final, flown mission release of the Apollo Guidance Computer (AGC) Command Module (CM) software for Apollo 13.

The starting point was the source code of Comanche 72 (itself previously reconstructed). Comanche 72 source code was then modified by incorporating changes known from contemporary documentation to have been made between revisions 72 and 72/3. The resulting code assembles to have identical memory-bank checksums as those specified in NASA drawing 2021153G; this gives reasonably high confidence that the changes that have been made are correct. In places where ambiguity exists, this ambiguity is discussed in "## Reconstruction:" comments.

Since no contemporary listings of Comanche 72/3 are available as source material, all comments and labels are approximate. They have been taken from other AGC programs where possible, or, in some places, written from scratch to match what we believe would have been in the original listing.

058976,000002:                                                                                                  ## Copyright:   Public domain.
058977,000003:                                                                                                  ## Filename:    RESTARTS_ROUTINE.agc
058978,000004:                                                                                                  ## Purpose:     A section of Manche72 revision 3.
058979,000005:                                                                                                  ##              It is part of the reconstructed source code for the final, flown
058980,000006:                                                                                                  ##              release of the software for the Command Module's (CM) Apollo
058981,000007:                                                                                                  ##              Guidance Computer (AGC) for Apollo 13. No original listings
058982,000008:                                                                                                  ##              of this program are available; instead, this file was recreated
058983,000009:                                                                                                  ##              from a reconstructed copy of Comanche 072. It has been adapted
058984,000010:                                                                                                  ##              such that the resulting bugger words exactly match those
058985,000011:                                                                                                  ##              specified for Manche72 revision 3 in NASA drawing 2021153G,
058986,000012:                                                                                                  ##              which gives relatively high confidence that the reconstruction
058987,000013:                                                                                                  ##              is correct.
058988,000014:                                                                                                  ## Assembler:   yaYUL
058989,000015:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
058990,000016:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
058991,000017:                                                                                                  ## Mod history: 2024-05-19 MAS  Created from Comanche 072.
058992,000018: 
058993,000019: 01,3520                                           BANK     01                                    
058994,000020: 01,2000                                           SETLOC   RESTART                               
058995,000021: 01,2000                                           BANK                                           
058996,000022: 
058997,000023: 01,3520  E3,1436                                  EBANK=   PHSNAME1                              #  GOPROG MUST SWITCH TO THIS EBANK
058998,000024: 
058999,000025: 01,3520                                           COUNT    01/RSROU                              
059000,000026: 
059001,000027: 01,3520           30161        RESTARTS           CA       MPAC       +5                         #  GET GROUP NUMBER -1
059002,000028: 01,3521           60000                           DOUBLE                                         #  SAVE FOR INDEXING
059003,000029: 01,3522           54155                           TS       TEMP2G                                
059004,000030: 
059005,000031: 01,3523           33762                           CA       PHS2CADR                              #  SET UP EXIT IN CASE IT IS AN EVEN
059006,000032: 01,3524           54157                           TS       TEMPSWCH                              #  TABLE PHASE
059007,000033: 
059008,000034: 01,3525           33557                           CA       RTRNCADR                              #  TO SAVE TIME ASSUME IT WILL GET NEXT
059009,000035: 01,3526           54707                           TS       GOLOC      +2                         #  GROUP AFTER THIS
059010,000036: 
059011,000037: 01,3527           30154                           CA       TEMPPHS                               
059012,000038: 01,3530           75065                           MASK     OCT1400                               
059013,000039: 01,3531           10000                           CCS      A                                     #  IS IT A VARIABLE OR TABLE RESTART
059014,000040: 01,3532           13543                           TCF      ITSAVAR                               #  IT:S A VARIABLE RESTART
059015,000041: 
059016,000042: 01,3533           10154        GETPART2           CCS      TEMPPHS                               #  IS IT AN X.1 RESTART
059017,000043: 01,3534           10000                           CCS      A                                     
059018,000044: 01,3535           13643                           TCF      ITSATBL                               #  NO, ITS A TABLE RESTART
059019,000045: 
059020,000046: 01,3536           35102                           CA       PRIO14                                #  IT IS AN X.1 RESTART, THEREFORE START
059021,000047: 01,3537           05163                           TC       FINDVAC                               #  THE DISPLAY RESTART JOB
059022,000048: 01,3540  E3,1400                                  EBANK=   LST1                                  
059023,000049: 01,3540           03261 20063                     2CADR    INITDSP                               
059024,000050: 
059025,000051: 01,3542           03557                           TC       RTRNCADR                              #  FINISHED WITH THIS GROUP, GET NEXT ONE
059026,000052: 
059027,000053: 01,3543           75065        ITSAVAR            MASK     OCT1400                               #  IS IT TYPE B ?
059028,000054: 01,3544           10000                           CCS      A                                     
059029,000055: 01,3545           13614                           TCF      ITSLIKEB                              #  YES, IT IS TYPE B
059030,000056: 
059031,000057: 01,3546           00006                           EXTEND                                         #  STORE THE JOB (OR TASK) 2CADR FOR EXIT
059032,000058: 01,3547           50155                           NDX      TEMP2G                                
059033,000059: 01,3550           31437                           DCA      PHSNAME1                              
059034,000060: 01,3551           52706                           DXCH     GOLOC                                 
059035,000061: 
059036,000062: 01,3552           30154                           CA       TEMPPHS                               #  SEE IF THIS IS A JOB, TASK, OR A LONGCAL
059037,000063: 01,3553           75037                           MASK     OCT7                                  
059038,000064: 01,3554           67715                           AD       MINUS2                                
059039,000065: 01,3555           10000                           CCS      A                                     
059040,000066: 01,3556           13726                           TCF      ITSLNGCL                              #  ITS A LONGCALL
059041,000067: 
059042,000068: 01,3557           04711        RTRNCADR           TC       SWRETURN                              #  CANT GET HERE
059043,000069: 01,3560           13562                           TCF      ITSAWAIT                              
059044,000070: 
059045,000071: 01,3561           13627                           TCF      ITSAJOB                               #  ITS A JOB
059046,000072: 
059047,000073: 01,3562           33766        ITSAWAIT           CA       WTLTCADR                              #  SET UP WAITLIST CALL
059048,000074: 01,3563           54704                           TS       GOLOC      -1                         
059049,000075: 
059050,000076: 01,3564           50155                           NDX      TEMP2G                                #  DIRECTLY STORED
059051,000077: 01,3565           31054                           CA       PHSPRDT1                              
059052,000078: 01,3566           10000        TIMETEST           CCS      A                                     #  IS IT AN IMMEDIATE RESTART
059053,000079: 01,3567           24000                           INCR     A                                     #  NO,
059054,000080: 01,3570           13573                           TCF      FINDTIME                              #  FIND OUT WHEN IT SHOULD BEGIN
059055,000081: 
059056,000082: 01,3571           15514                           TCF      ITSINDIR                              #  STORED INDIRECTLY
059057,000083: 
059058,000084: 01,3572           13612                           TCF      IMEDIATE                              #  IT WANTS AN IMMEDIATE RESTART
059059,000085: 
059060,000086:                                                                                                  #  ***** THIS MUST BE IN FIXED FIXED *****
059061,000087: 
059062,000088:    5514                                           BLOCK    02                                    
059063,000089:    4000                                           SETLOC   FFTAG2                                
059064,000090:    4000                                           BANK                                           
059065,000091: 
059066,000092:    5514                                           COUNT    02/RSROU                              
059067,000093: 
059068,000094:    5514           22706        ITSINDIR           LXCH     GOLOC      +1                         #  GET THE CORRECT E BANK IN CASE THIS IS
059069,000095:    5515           22006                           LXCH     BB                                    #  SWITCHED ERRASIBLE
059070,000096: 
059071,000097:    5516           50000                           NDX      A                                     #  GET THE TIME INDIRECTLY
059072,000098:    5517           30001                           CA       1                                     
059073,000099: 
059074,000100:    5520           22006                           LXCH     BB                                    #  RESTORE THE BB AND GOLOC
059075,000101:    5521           22706                           LXCH     GOLOC      +1                         
059076,000102: 
059077,000103:    5522           13573                           TCF      FINDTIME                              #  FIND OUT WHEN IT SHOULD BEGIN
059078,000104: 
059079,000105:                                                                                                  #  ***** YOU MAY RETURN TO SWITCHED FIXED *****
059080,000106: 
059081,000107: 01,3573                                           BANK     01                                    
059082,000108: 01,2000                                           SETLOC   RESTART                               
059083,000109: 01,2000                                           BANK                                           
059084,000110: 
059085,000111: 01,3573                                           COUNT    01/RSROU                              
059086,000112: 
059087,000113: 01,3573           40000        FINDTIME           COM                                            #  MAKE NEGITIVE SINCE IT WILL BE SUBTRACTD
059088,000114: 01,3574           54001                           TS       L                                     #  AND SAVE
059089,000115: 01,3575           50155                           NDX      TEMP2G                                
059090,000116: 01,3576           41053                           CS       TBASE1                                
059091,000117: 01,3577           00006                           EXTEND                                         
059092,000118: 01,3600           60025                           SU       TIME1                                 
059093,000119: 01,3601           10000                           CCS      A                                     
059094,000120: 01,3602           40000                           COM                                            
059095,000121: 01,3603           67700                           AD       OCT37776                              
059096,000122: 01,3604           65033                           AD       ONE                                   
059097,000123: 01,3605           60001                           AD       L                                     
059098,000124: 01,3606           10000                           CCS      A                                     
059099,000125: 01,3607           35035                           CA       ZERO                                  
059100,000126: 01,3610           13612                           TCF      +2                                    
059101,000127: 01,3611           13612                           TCF      +1                                    
059102,000128: 01,3612           65033        IMEDIATE           AD       ONE                                   
059103,000129: 01,3613           00704                           TC       GOLOC      -1                         
059104,000130: 01,3614           33557        ITSLIKEB           CA       RTRNCADR                              #  TYPE B, SO STORE RETURN IN
059105,000131: 01,3615           54157                           TS       TEMPSWCH                              #  TEMPSWCH IN CASE OF AN EVEN PHASE
059106,000132: 
059107,000133: 01,3616           33763                           CA       PRT2CADR                              #  SET UP EXIT TO GET TABLE PART OF THIS
059108,000134: 01,3617           54707                           TS       GOLOC      +2                         #  VARIABLE TYPE OF PHASE
059109,000135: 
059110,000136: 01,3620           30154                           CA       TEMPPHS                               #  MAKE THE PHASE LOOK RIGHT FOR THE TABLE
059111,000137: 01,3621           76043                           MASK     OCT177                                #  PART OF THIS VARIABLE PHASE
059112,000138: 01,3622           54154                           TS       TEMPPHS                               
059113,000139: 
059114,000140: 01,3623           00006                           EXTEND                                         
059115,000141: 01,3624           50155                           NDX      TEMP2G                                #  OBTAIN THE JOB:S 2CADR
059116,000142: 01,3625           31437                           DCA      PHSNAME1                              
059117,000143: 01,3626           52706                           DXCH     GOLOC                                 
059118,000144: 
059119,000145: 01,3627           50155        ITSAJOB            NDX      TEMP2G                                #  NOW ADD THE PRIORITY AND LET:S GO
059120,000146: 01,3630           31054                           CA       PHSPRDT1                              
059121,000147: 01,3631           54704        CHKNOVAC           TS       GOLOC      -1                         #  SAVE PRIO UNTIL WE SEE IF ITS
059122,000148: 01,3632           00006                           EXTEND                                         #  A FINDVAC OR A NOVAC
059123,000149: 01,3633           63637                           BZMF     ITSNOVAC                              
059124,000150: 
059125,000151: 01,3634           33765                           CAF      FVACCADR                              #  POSITIVE, SET UP FINDVAC CALL.
059126,000152: 01,3635           56704                           XCH      GOLOC      -1                         #  PICK UP PRIO,
059127,000153: 01,3636           00704                           TC       GOLOC      -1                         #  AND GO
059128,000154: 
059129,000155: 01,3637           33767        ITSNOVAC           CAF      NOVACADR                              #  NEGATIVE,
059130,000156: 01,3640           56704                           XCH      GOLOC      -1                         #  SET UP NOVAC CALL,
059131,000157: 01,3641           40000                           COM                                            #  CORRECT PRIO,
059132,000158: 01,3642           00704                           TC       GOLOC      -1                         #  AND GO
059133,000159: 
059134,000160: 01,3643           54020        ITSATBL            TS       CYR                                   #  FIND OUT IF THE PHASE IS ODD OR EVEN
059135,000161: 01,3644           10020                           CCS      CYR                                   
059136,000162: 01,3645           13646                           TCF      +1                                    #  IT:S EVEN
059137,000163: 01,3646           13744                           TCF      ITSEVEN                               
059138,000164: 
059139,000165: 01,3647           33557                           CA       RTRNCADR                              #  IN CASE THIS IS THE SECOND PART OF A
059140,000166: 01,3650           54707                           TS       GOLOC      +2                         #  TYPE B RESTART, WE NEED PROPER EXIT
059141,000167: 01,3651           30154                           CA       TEMPPHS                               #  SET UP POINTER FOR FINDING OUR PLACE IN
059142,000168: 01,3652           54021                           TS       SR                                    #  THE RESTART TABLES
059143,000169: 01,3653           60021                           AD       SR                                    
059144,000170: 01,3654           50155                           NDX      TEMP2G                                
059145,000171: 01,3655           62001                           AD       SIZETAB    +1                         
059146,000172: 01,3656           54156                           TS       POINTER                               
059147,000173: 
059148,000174: 01,3657           00006        CONTBL2            EXTEND                                         #  FIND OUT WHAT:S IN THE TABLE
059149,000175: 01,3660           50156                           NDX      POINTER                               
059150,000176: 01,3661           32002                           DCA      CADRTAB                               #  GET THE 2CADR
059151,000177: 
059152,000178: 01,3662           22706                           LXCH     GOLOC      +1                         #  STORE THE BB INFORMATION
059153,000179: 
059154,000180: 01,3663           10000                           CCS      A                                     #  IS IT A JOB OR IS IT TIMED
059155,000181: 01,3664           24000                           INCR     A                                     #  POSITIVE, MUST BE A JOB
059156,000182: 01,3665           13740                           TCF      ITSAJOB2                              
059157,000183: 
059158,000184: 01,3666           24000                           INCR     A                                     #  MUST BE EITHER A WAITLIST OR LONGCALL
059159,000185: 01,3667           54705                           TS       GOLOC                                 #  LET-S STORE THE CORRECT CADR
059160,000186: 
059161,000187: 01,3670           33766                           CA       WTLTCADR                              #  SET UP OUR EXIT TO WAITLIST
059162,000188: 01,3671           54704                           TS       GOLOC      -1                         
059163,000189: 
059164,000190: 01,3672           30706                           CA       GOLOC      +1                         #  NOW FIND OUT IF IT IS A WAITLIST CALL
059165,000191: 01,3673           75022                           MASK     BIT10                                 #  THIS SHOULD BE ONE IF WE HAVE -BB
059166,000192: 01,3674           10000                           CCS      A                                     #  FOR THAT MATTER SO SHOULD BE BITS 9,8,7,
059167,000193:                                                                                                  #  6,5, AND LAST BUT NOT LEAST (PERHAPS NOT
059168,000194:                                                                                                  #  IN IMPORTANCE ANYWAY.  BIT 4
059169,000195: 01,3675           13733                           TCF      ITSWTLST                              #  IT IS A WAITLIST CALL
059170,000196: 
059171,000197: 01,3676           50156                           NDX      POINTER                               #  OBTAIN THE ORIGINAL DELTA T
059172,000198: 01,3677           32000                           CA       PRDTTAB                               #  ADDRESS FOR THIS LONGCALL
059173,000199: 
059174,000200: 01,3700           15523                           TCF      ITSLGCL1                              #  NOW GO GET THE DELTA TIME
059175,000201: 
059176,000202:                                                                                                  #  ***** THIS MUST BE IN FIXED FIXED *****
059177,000203: 
059178,000204:    5523                                           BLOCK    02                                    
059179,000205:    4000                                           SETLOC   FFTAG2                                
059180,000206:    4000                                           BANK                                           
059181,000207: 
059182,000208:    5523                                           COUNT    02/RSROU                              
059183,000209: 
059184,000210:    5523           22706        ITSLGCL1           LXCH     GOLOC      +1                         #  OBTAIN THE CORRECT E BANK
059185,000211:    5524           22006                           LXCH     BB                                    
059186,000212:    5525           22706                           LXCH     GOLOC      +1                         #  AND PRESERVE OUR E AND F BANKS
059187,000213: 
059188,000214:    5526           00006                           EXTEND                                         #  GET THE DELTA TIME
059189,000215:    5527           50000                           NDX      A                                     
059190,000216:    5530           30001                           DCA      0                                     
059191,000217:    5531           22706                           LXCH     GOLOC      +1                         #  RESTORE OUR E AND F BANK
059192,000218:    5532           22006                           LXCH     BB                                    #  RESTORE THE TASKS E AND F BANKS
059193,000219:    5533           22706                           LXCH     GOLOC      +1                         #  AND PRESERVE OUR L
059194,000220:    5534           13701                           TCF      ITSLGCL2                              #  NOW LET:S PROCESS THIS LONGCALL
059195,000221: 
059196,000222:                                                                                                  #  ***** YOU MAY RETURN TO SWITCHED FIXED *****
059197,000223: 
059198,000224: 01,3701                                           BANK     01                                    
059199,000225: 01,2000                                           SETLOC   RESTART                               
059200,000226: 01,2000                                           BANK                                           
059201,000227: 
059202,000228: 01,3701                                           COUNT    01/RSROU                              
059203,000229: 01,3701           53140        ITSLGCL2           DXCH     LONGTIME                              
059204,000230: 
059205,000231: 01,3702           00006                           EXTEND                                         #  CALCULATE TIME LEFT
059206,000232: 01,3703           40025                           DCS      TIME2                                 
059207,000233: 01,3704           21140                           DAS      LONGTIME                              
059208,000234: 01,3705           00006                           EXTEND                                         
059209,000235: 01,3706           31136                           DCA      LONGBASE                              
059210,000236: 01,3707           21140                           DAS      LONGTIME                              
059211,000237: 
059212,000238: 01,3710           11137                           CCS      LONGTIME                              #  FIND OUT HOW THIS SHOULD BE RESTARTED
059213,000239: 01,3711           13721                           TCF      LONGCLCL                              
059214,000240: 01,3712           13714                           TCF      +2                                    
059215,000241: 01,3713           13607                           TCF      IMEDIATE   -3                         
059216,000242: 01,3714           11140                           CCS      LONGTIME   +1                         
059217,000243: 01,3715           13721                           TCF      LONGCLCL                              
059218,000244: 01,3716           13717                           NOOP                                           #  CAN:T GET HERE *********
059219,000245: 01,3717           13607                           TCF      IMEDIATE   -3                         
059220,000246: 01,3720           13612                           TCF      IMEDIATE                              
059221,000247: 
059222,000248: 01,3721           33764        LONGCLCL           CA       LGCLCADR                              #  WE WILL GO TO LONGCALL
059223,000249: 01,3722           54704                           TS       GOLOC      -1                         
059224,000250: 
059225,000251: 01,3723           00006                           EXTEND                                         #  PREPARE OUR ENTRY TO LONGCALL
059226,000252: 01,3724           31140                           DCA      LONGTIME                              
059227,000253: 01,3725           00704                           TC       GOLOC      -1                         
059228,000254: 
059229,000255: 01,3726           33766        ITSLNGCL           CA       WTLTCADR                              #  ASSUME IT WILL GO TO WAITLIST
059230,000256: 01,3727           54704                           TS       GOLOC      -1                         
059231,000257: 
059232,000258: 01,3730           50155                           NDX      TEMP2G                                
059233,000259: 01,3731           41054                           CS       PHSPRDT1                              #  GET THE DELTA T ADDRESS
059234,000260: 
059235,000261: 01,3732           15523                           TCF      ITSLGCL1                              #  NOW GET THE DELTA TIME
059236,000262: 
059237,000263: 01,3733           40706        ITSWTLST           CS       GOLOC      +1                         #  CORRECT THE BBCON INFORMATION
059238,000264: 01,3734           54706                           TS       GOLOC      +1                         
059239,000265: 01,3735           50156                           NDX      POINTER                               #  GET THE DT AND FIND OUT IF IT WAS STORED
059240,000266: 01,3736           32000                           CA       PRDTTAB                               #  DIRECTLY OR INDIRECTLY
059241,000267: 
059242,000268: 01,3737           13566                           TCF      TIMETEST                              #  FIND OUT HOW THE TIME IS STORED
059243,000269: 
059244,000270: 01,3740           56705        ITSAJOB2           XCH      GOLOC                                 #  STORE THE CADR
059245,000271: 
059246,000272: 01,3741           50156                           NDX      POINTER                               #  ADD THE PRIORITY AND LET:S GO
059247,000273: 01,3742           32000                           CA       PRDTTAB                               
059248,000274: 
059249,000275: 01,3743           13631                           TCF      CHKNOVAC                              
059250,000276: 
059251,000277: 01,3744           30157        ITSEVEN            CA       TEMPSWCH                              #  SET UP FOR EITHER THE SECOND PART OF THE
059252,000278: 01,3745           54707                           TS       GOLOC      +2                         #  TABLE, OR A RETURN FOR THE NEXT GROUP
059253,000279: 
059254,000280: 01,3746           50155                           NDX      TEMP2G                                #  SET UP POINTER FOR OUR LOCATION WITHIN
059255,000281: 01,3747           32000                           CA       SIZETAB                               #  THE TABLE
059256,000282: 01,3750           60154                           AD       TEMPPHS                               #  THIS MAY LOOK BAD BUT LET:S SEE YOU DO
059257,000283: 01,3751           60154                           AD       TEMPPHS                               #  BETTER IN TIME OR NUMBERR OF LOCATIONS
059258,000284: 01,3752           60154                           AD       TEMPPHS                               
059259,000285: 01,3753           54156                           TS       POINTER                               
059260,000286: 
059261,000287: 01,3754           13657                           TCF      CONTBL2                               #  NOW PROCESS WHAT IS IN THE TABLE
059262,000288: 
059263,000289: 01,3755           36214        PHSPART2           CA       THREE                                 #  SET THE POINTER FOR THE SECOND HALF OF
059264,000290: 01,3756           26156                           ADS      POINTER                               #  THE TABLE
059265,000291: 
059266,000292: 01,3757           33557                           CA       RTRNCADR                              #  THIS WILL BE OUR LAST TIME THROUGH THE
059267,000293: 01,3760           54707                           TS       GOLOC      +2                         #  EVEN TABLE, SO AFTER IT GET THE NEXT
059268,000294:                                                                                                  #  GROUP
059269,000295: 01,3761           13657                           TCF      CONTBL2                               #  SO LET:S GET THE SECOND ENTRY IN THE TBL
059270,000296: 
059271,000297: 01,3762     0154               TEMPPHS            EQUALS   MPAC                                  
059272,000298: 01,3762     0155               TEMP2G             EQUALS   MPAC       +1                         
059273,000299: 01,3762     0156               POINTER            EQUALS   MPAC       +2                         
059274,000300: 01,3762     0157               TEMPSWCH           EQUALS   MPAC       +3                         
059275,000301: 01,3762     0705               GOLOC              EQUALS   VAC5       +20D                       
059276,000302: 01,3762     7715               MINUS2             EQUALS   NEG2                                  
059277,000303: 01,3762     6043               OCT177             EQUALS   LOW7                                  
059278,000304: 
059279,000305: 01,3762           03755        PHS2CADR           GENADR   PHSPART2                              
059280,000306: 01,3763           03533        PRT2CADR           GENADR   GETPART2                              
059281,000307: 01,3764           05356        LGCLCADR           GENADR   LONGCALL                              
059282,000308: 01,3765           05163        FVACCADR           GENADR   FINDVAC                               
059283,000309: 01,3766           05261        WTLTCADR           GENADR   WAITLIST                              
059284,000310: 01,3767           05150        NOVACADR           GENADR   NOVAC                                 
059285,000311: 
059286,000312: 
059287,000313: 
059288,000314: 

End of include-file RESTARTS_ROUTINE.agc.  Parent file is MAIN.agc