Source Code

This is a reconstructed version of Luminary 130, the initial AGC program released in November 1969 for the Apollo 13 LM. Three more releases followed before the flown revision was finally manufactured in February 1970.

This reconstruction was created from a previous transcription of the original listing of Luminary 131, combined with Luminary memo #129 which describes the small difference between the Luminary 130 and 131. The reconstructed source code was verified by matching memory-bank checksums to those listed for Luminary 130 in drawing 2021152G.

In this source code, program comments from the original (Luminary 131) code are prefixed with '#', while those added later by the Virtual AGC project are prefixed with '##'.

035833,000002:                                                                                                  ## Copyright:   Public domain.
035834,000003:                                                                                                  ## Filename:    P12.agc
035835,000004:                                                                                                  ## Purpose:     A section of the reconstructed source code for Luminary 130.
035836,000005:                                                                                                  ##              This was the original program released for the Apollo 13 LM,
035837,000006:                                                                                                  ##              although several more revisions would follow. It has been
035838,000007:                                                                                                  ##              reconstructed from a listing of Luminary 131, from which it
035839,000008:                                                                                                  ##              differs on only two lines in P70-P71. The difference is
035840,000009:                                                                                                  ##              described in detail in Luminary memo #129, which was used
035841,000010:                                                                                                  ##              to perform the reconstruction. This file is intended to be a
035842,000011:                                                                                                  ##              faithful reconstruction, except that the code format has been
035843,000012:                                                                                                  ##              changed to conform to the requirements of the yaYUL assembler
035844,000013:                                                                                                  ##              rather than the original YUL assembler.
035845,000014:                                                                                                  ## Reference:   pp. 831-835
035846,000015:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
035847,000016:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
035848,000017:                                                                                                  ## Mod history: 05/26/03 RSB.   Began transcribing.
035849,000018:                                                                                                  ##              05/14/05 RSB    Corrected website reference above.
035850,000019:                                                                                                  ##              2017-01-06 RSB  Page numbers now agree with those on the
035851,000020:                                                                                                  ##                              original harcopy, as opposed to the PDF page
035852,000021:                                                                                                  ##                              numbers in 1701.pdf.
035853,000022:                                                                                                  ##              2017-01-28 RSB  Proofed comment text using octopus/prooferComments
035854,000023:                                                                                                  ##                              and fixed errors found.
035855,000024:                                                                                                  ##              2017-02-26 RSB  Proofed comment text using octopus/ProoferComments.
035856,000025:                                                                                                  ##              2017-03-13 RSB  Comment-text fixes noted in proofing Luminary 116.
035857,000026:                                                                                                  ##              2017-08-26 MAS  Fixed a comment-text error found while transcribing
035858,000027:                                                                                                  ##                              Zerlina 56.
035859,000028:                                                                                                  ##              2018-09-04 MAS  Copied from Luminary 131 for Luminary 130.
035860,000029: 

Page 831

035862,000031: 24,3700                                           BANK     24                                    
035863,000032: 30,2000                                           SETLOC   P12                                   
035864,000033: 30,2000                                           BANK                                           
035865,000034: 
035866,000035: 30,2061  E7,1515                                  EBANK=   DVCNTR                                
035867,000036: 30,2061                                           COUNT*   $$/P12                                
035868,000037: 
035869,000038: 30,2061           05353        P12LM              TC       PHASCHNG                              
035870,000039: 30,2062           04024                           OCT      04024                                 
035871,000040: 
035872,000041: 30,2063           04616                           TC       BANKCALL                              
035873,000042: 30,2064           11233                           CADR     R02BOTH                               #  CHECK THE STATUS OF THE IMU.
035874,000043: 30,2065           06011                           TC       CLRADMOD                              #  INITIALIZE RADMODES FOR R29.
035875,000044: 30,2066           36000                           CAF      THRESH2                               #  INITIALIZE DVMON
035876,000045: 30,2067           55250                           TS       DVTHRUSH                              
035877,000046: 30,2070           34751                           CAF      FOUR                                  
035878,000047: 30,2071           55515                           TS       DVCNTR                                
035879,000048: 
035880,000049: 30,2072           34755                           CA       ZERO                                  
035881,000050: 30,2073           55462                           TS       TRKMKCNT                              #  SHOW THAT R29 DOWNLINK DATA IS NOT READY
035882,000051: 
035883,000052: 30,2074           33022                           CAF      V06N33A                               
035884,000053: 30,2075           04616                           TC       BANKCALL                              #  FLASH TIG
035885,000054: 30,2076           20477                           CADR     GOFLASH                               
035886,000055: 30,2077           16001                           TCF      GOTOPOOH                              
035887,000056: 30,2100           12102                           TCF      +2                                    #  PROCEED
035888,000057: 30,2101           12074                           TCF      -5                                    #  ENTER
035889,000058: 
035890,000059: 30,2102           05353                           TC       PHASCHNG                              
035891,000060: 30,2103           04024                           OCT      04024                                 
035892,000061: 
035893,000062: 30,2104           06042                           TC       INTPRET                               
035894,000063: 30,2105           43014                           SET      SET                                   
035895,000064: 30,2106           03067                                    MUNFLAG                               
035896,000065: 30,2107           06464                                    ACC4-2FL                              
035897,000066: 30,2110           43014                           SET      CLEAR                                 
035898,000067: 30,2111           00075                                    R10FLAG                               
035899,000068: 30,2112           00270                                    RNDVZFLG                              
035900,000069: 30,2113           43014                           SET      SET                                   
035901,000070: 30,2114           04464                                    FLPI                                  
035902,000071: 30,2115           04461                                    FLVR                                  
035903,000072: 30,2116           77624                           CALL                                           #  INITIALIZE WM AND /LAND/
035904,000073: 30,2117           71343                                    GUIDINIT                              
035905,000074: 30,2120           77624                           CALL                                           
035906,000075: 30,2121           60251                                    P12INIT                               
035907,000076: 30,2122           77745        P12LMB             DLOAD                                          
035908,000077: 30,2123           25740                                    (TGO)A                                #  SET TGO TO AN INITIAL NOMINAL VALUE.
035909,000078: 30,2124           17517                           STODL    TGO                                   

Page 832

035911,000080: 30,2125           03442                                    TIG                                   
035912,000081: 30,2126           34041                           STCALL   TDEC1                                 
035913,000082: 30,2127           27056                                    LEMPREC                               #  ROTATE THE STATE VECTORS TO THE
035914,000083: 30,2130           64375                           VLOAD    MXV                                   #  IGNITION TIME.
035915,000084: 30,2131           00007                                    VATT                                  
035916,000085: 30,2132           01734                                    REFSMMAT                              
035917,000086: 30,2133           77772                           VSL1                                           
035918,000087: 30,2134           27601                           STOVL    V1S                                   #  COMPUTE V1S = VEL(TIG)*2(-7) M/CS.
035919,000088: 30,2135           00001                                    RATT                                  
035920,000089: 30,2136           52521                           MXV      VSL6                                  
035921,000090: 30,2137           01734                                    REFSMMAT                              
035922,000091: 30,2140           37521                           STCALL   R                                     #  COMPUTE R = POS(TIG)*2(-24) M.
035923,000092: 30,2141           67067                                    MUNGRAV                               #  COMPUTE GDT1/2(TIG)*2(-7)M/CS.
035924,000093: 30,2142           53575                           VLOAD    UNIT                                  
035925,000094: 30,2143           03521                                    R                                     
035926,000095: 30,2144           37537                           STCALL   UNIT/R/                               #  COMPUTE UNIT/R/ FOR YCOMP.
035927,000096: 30,2145           57313                                    YCOMP                                 
035928,000097: 30,2146           57461                           SR       DCOMP                                 
035929,000098: 30,2147           20606                                    5D                                    
035930,000099: 30,2150           17643                           STODL    XRANGE                                #  INITIALIZE XRANGE FOR NOUN 76.
035931,000100: 30,2151           31367                                    VINJNOM                               
035932,000101: 30,2152           16277                           STODL    ZDOTD                                 
035933,000102: 30,2153           31371                                    RDOTDNOM                              
035934,000103: 30,2154           02273                           STORE    RDOTD                                 
035935,000104: 30,2155           77776                           EXIT                                           
035936,000105: 
035937,000106: 30,2156           05353                           TC       PHASCHNG                              
035938,000107: 30,2157           04024                           OCT      04024                                 
035939,000108: 
035940,000109: 30,2160           33021        NEWLOAD            CAF      V06N76                                #  FLASH CROSS-RANGE AND APOLUNE VALUES.
035941,000110: 30,2161           04616                           TC       BANKCALL                              
035942,000111: 30,2162           20477                           CADR     GOFLASH                               
035943,000112: 30,2163           16001                           TCF      GOTOPOOH                              
035944,000113: 30,2164           12166                           TCF      +2                                    #  PROCEED
035945,000114: 30,2165           12160                           TCF      NEWLOAD                               #  ENTER NEW DATA.
035946,000115: 
035947,000116: 30,2166           32314                           CAF      P12ADRES                              
035948,000117: 30,2167           55455                           TS       WHICH                                 
035949,000118: 
035950,000119: 30,2170           05353                           TC       PHASCHNG                              
035951,000120: 30,2171           04024                           OCT      04024                                 
035952,000121: 
035953,000122: 30,2172           06042                           TC       INTPRET                               
035954,000123: 30,2173           54345                           DLOAD    SL                                    
035955,000124: 30,2174           03643                                    XRANGE                                
035956,000125: 30,2175           20206                                    5D                                    
035957,000126: 30,2176           77615                           DAD                                            
035958,000127: 30,2177           02335                                    Y                                     
035959,000128: 30,2200           27633                           STOVL    YCO                                   
035960,000129: 30,2201           03537                                    UNIT/R/                               

Page 833

035962,000131: 30,2202           53361                           VXSC     VAD                                   
035963,000132: 30,2203           31365                                    49FPS                                 
035964,000133: 30,2204           03601                                    V1S                                   
035965,000134: 30,2205           03527                           STORE    V                                     #  V(TIPOVER) = V(IGN) + 57FPS (UNIT/R/)
035966,000135: 30,2206           72441                           DOT      SL1                                   
035967,000136: 30,2207           03537                                    UNIT/R/                               
035968,000137: 30,2210           27474                           STOVL    RDOT                                  #  RDOT * 2(-7)
035969,000138: 30,2211           03537                                    UNIT/R/                               
035970,000139: 30,2212           53435                           VXV      UNIT                                  
035971,000140: 30,2213           03720                                    QAXIS                                 
035972,000141: 30,2214           37726                           STCALL   ZAXIS1                                
035973,000142: 30,2215           60315                                    ASCENT                                
035974,000143: 30,2216           77745        P12RET             DLOAD                                          
035975,000144: 30,2217           02361                                    ATP                                   #  ATP(2)*2(18)
035976,000145: 30,2220           65316                           DSQ      PDDL                                  
035977,000146: 30,2221           02355                                    ATY                                   #  ATY(2)*2(18)
035978,000147: 30,2222           43316                           DSQ      DAD                                   
035979,000148: 30,2223           75454                           BZE      SQRT                                  
035980,000149: 30,2224           60230                                    YAWDUN                                
035981,000150: 30,2225           55352                           SL1      BDDV                                  
035982,000151: 30,2226           02355                                    ATY                                   
035983,000152: 30,2227           77736                           ARCSIN                                         
035984,000153: 30,2230           26363        YAWDUN             STOVL    YAW                                   
035985,000154: 30,2231           03253                                    UNFC/2                                
035986,000155: 30,2232           50256                           UNIT     DOT                                   
035987,000156: 30,2233           03537                                    UNIT/R/                               
035988,000157: 30,2234           65552                           SL1      ARCCOS                                
035989,000158: 30,2235           77676                           DCOMP                                          
035990,000159: 30,2236           02365                           STORE    PITCH                                 
035991,000160: 30,2237           77776                           EXIT                                           
035992,000161: 30,2240           05353                           TC       PHASCHNG                              
035993,000162: 30,2241           04024                           OCT      04024                                 
035994,000163: 
035995,000164: 30,2242           00004                           INHINT                                         
035996,000165: 30,2243           04674                           TC       IBNKCALL                              
035997,000166: 30,2244           40143                           CADR     PFLITEDB                              
035998,000167: 30,2245           05516                           TC       DOWNFLAG                              
035999,000168: 30,2246           00213                           ADRES    FLPI                                  
036000,000169: 
036001,000170: 30,2247           04635                           TC       POSTJUMP                              
036002,000171: 30,2250           74130                           CADR     BURNBABY                              
036003,000172: 
036004,000173: 30,2251           77745        P12INIT            DLOAD                                          #  INITIALIZE ENGINE DATA.  USED FOR P12 AND
036005,000174: 30,2252           16013                                    (1/DV)A                               #  P71.
036006,000175: 30,2253           03641                           STORE    1/DV3                                 
036007,000176: 30,2254           03637                           STORE    1/DV2                                 
036008,000177: 30,2255           17635                           STODL    1/DV1                                 
036009,000178: 30,2256           16017                                    (AT)A                                 
036010,000179: 30,2257           16263                           STODL    AT                                    
036011,000180: 30,2260           16021                                    (TBUP)A                               

Page 834

036013,000182: 30,2261           16271                           STODL    TBUP                                  
036014,000183: 30,2262           34013                                    ATDECAY                               
036015,000184: 30,2263           54276                           DCOMP    SL                                    
036016,000185: 30,2264           20214                                    11D                                   
036017,000186: 30,2265           02267                           STORE    TTO                                   
036018,000187: 30,2266           57535                           SLOAD    DCOMP                                 
036019,000188: 30,2267           26001                                    APSVEX                                
036020,000189: 30,2270           77702                           SR2                                            
036021,000190: 30,2271           02265                           STORE    VE                                    
036022,000191: 30,2272           43414                           BOFF     RVQ                                   
036023,000192: 30,2273           04747                                    FLAP                                  
036024,000193: 30,2274           60275                                    COMMINIT                              
036025,000194: 30,2275           43345        COMMINIT           DLOAD    DAD                                   #  INITIALIZE TARGET DATA.  USED BY P12, P70
036026,000195: 30,2276           25736                                    HINJECT                               #  AND P71 IF IT DOES NOT FOLLOW P70.
036027,000196: 30,2277           02333                                    /LAND/                                
036028,000197: 30,2300           17631                           STODL    RCO                                   
036029,000198: 30,2301           06524                                    HI6ZEROS                              
036030,000199: 30,2302           03654                           STORE    TXO                                   
036031,000200: 30,2303           03633                           STORE    YCO                                   
036032,000201: 30,2304           26275                           STOVL    YDOTD                                 
036033,000202: 30,2305           01563                                    VRECTCSM                              
036034,000203: 30,2306           64235                           VXV      MXV                                   
036035,000204: 30,2307           01555                                    RRECTCSM                              
036036,000205: 30,2310           01734                                    REFSMMAT                              
036037,000206: 30,2311           77656                           UNIT                                           
036038,000207: 30,2312           03720                           STORE    QAXIS                                 
036039,000208: 30,2313           77616                           RVQ                                            
036040,000209: 
036041,000210: 30,2314           02024        P12ADRES           REMADR   P12TABLE                              
036042,000211: 
036043,000212: 34,2000                                           SETLOC   ASENT8                                
036044,000213: 34,2000                                           BANK                                           
036045,000214: 34,3343                                           COUNT*   $$/P12                                
036046,000215: 
036047,000216: 34,3343           40220        GUIDINIT           STQ      SETPD                                 
036048,000217: 34,3344           01163                                    TEMPR60                               
036049,000218: 34,3345           00001                                    0D                                    
036050,000219: 34,3346           41575                           VLOAD    PUSH                                  
036051,000220: 34,3347           06516                                    UNITZ                                 
036052,000221: 34,3350           41434                           RTB      PUSH                                  
036053,000222: 34,3351           21574                                    LOADTIME                              
036054,000223: 34,3352           77624                           CALL                                           
036055,000224: 34,3353           55716                                    RP-TO-R                               
036056,000225: 34,3354           74321                           MXV      VXSC                                  
036057,000226: 34,3355           01734                                    REFSMMAT                              
036058,000227: 34,3356           16027                                    MOONRATE                              
036059,000228: 34,3357           26325                           STOVL    WM                                    
036060,000229: 34,3360           02023                                    RLS                                   
036061,000230: 34,3361           52446                           ABVAL    SL3                                   
036062,000231: 34,3362           36333                           STCALL   /LAND/                                

Page 835

036064,000233: 34,3363           01163                                    TEMPR60                               
036065,000234: 
036066,000235: 34,3364           00046 07374  49FPS              2DEC     .149352    B-6                        #  EXPECTED RDOT AT TIPOVER
036067,000236: 34,3366           04145 15527  VINJNOM            2DEC     16.7924    B-7                        #  5509.5 FPS(APO=30NM WITH RDOT=19.5FPS)
036068,000237: 34,3370           00007 23346  RDOTDNOM           2DEC     .059436    B-7                        #  19.5 FPS
036069,000238: 
036070,000239: 

End of include-file P12.agc.  Parent file is MAIN.agc