Source Code

This is a reconstruction of the AGC program Luminary 99 Rev 0. It was the second release of the Lunar Module flight software targeted for use in Apollo 11, after Luminary 97. A bug (which had been around since at least Apollo 10, Luminary 69) was discovered in Rev 0 shortly before the Apollo 11 flight, resulting in a last minute revision into Rev 1, which is what actually flew rather than the Rev 0 presented here. A hardcopy of Rev 0 is known to exist — it belonged to AGC developer Allan Klumpp for many years — but unfortunately the Virtual AGC Project has not had access to that hardcopy. Thus the code you see here had been reconstructed (we believe accurately) rather than transcribed. The first step of the reconstruction of the Rev 0 source code was the transcription of the Rev 1 source code from a hardcopy in the MIT Museum collection. The process of reverting the active portion of the source code (i.e., other than program comments) from Rev 1 to Rev 0 was very minor, consisting only of moving the position of the STARTSB1 label in FRESH START AND RESTART. Allan had previously given us the checksums of the memory banks of Rev 0, and we have verified the program presented here has checksums identical to all banks of Allan's listing of Rev 0. The notations on Allan's Rev 0 program listing read, in part:

	GAP:  ASSEMBLE REVISION 099 OF AGC PROGRAM LUMINARY BY NASA 2021112-051

A single program comment is known to differ between Rev 0 and Rev 1, but these are harder to reconstruct and verify than changes to the active portion of the code. Thus it is possible that there are additional differences between the program comments in Rev 0 and Rev 1 that are unknown to us, and therefore are not reflected in the code presented here.

047621,000002:                                                                                                  ## Copyright:   Public domain.
047622,000003:                                                                                                  ## Filename:    FIXED-FIXED_CONSTANT_POOL.agc
047623,000004:                                                                                                  ## Purpose:     Part of the reconstructed source code for LMY99 Rev 0,
047624,000005:                                                                                                  ##              otherwise known as Luminary Rev 99, the second release
047625,000006:                                                                                                  ##              of the Apollo Guidance Computer (AGC) software for Apollo 11.
047626,000007:                                                                                                  ##              It differs from LMY99 Rev 1 (the flown version) only in the
047627,000008:                                                                                                  ##              placement of a single label. The corrections shown here have
047628,000009:                                                                                                  ##              been verified to have the same bank checksums as AGC developer
047629,000010:                                                                                                  ##              Allan Klumpp's copy of Luminary Rev 99, and so are believed
047630,000011:                                                                                                  ##              to be accurate. This file is intended to be a faithful 
047631,000012:                                                                                                  ##              recreation, except that the code format has been changed to 
047632,000013:                                                                                                  ##              conform to the requirements of the yaYUL assembler rather than 
047633,000014:                                                                                                  ##              the original YUL assembler.
047634,000015:                                                                                                  ##
047635,000016:                                                                                                  ## Assembler:   yaYUL
047636,000017:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
047637,000018:                                                                                                  ## Website:     www.ibiblio.org/apollo.
047638,000019:                                                                                                  ## Pages:       1095-1099
047639,000020:                                                                                                  ## Mod history: 2009-05-25 RSB  Adapted from the corresponding 
047640,000021:                                                                                                  ##                              Luminary131 file, using page 
047641,000022:                                                                                                  ##                              images from Luminary 1A.
047642,000023:                                                                                                  ##              2016-12-17 RSB  Proofed text comments with octopus/ProoferComments
047643,000024:                                                                                                  ##                              and corrected the errors found.
047644,000025:                                                                                                  ##              2017-03-13 RSB  Comment-text fixes noted in proofing Luminary 116.
047645,000026:                                                                                                  ##              2017-08-01 MAS  Created from LMY99 Rev 1.
047646,000027: 
047647,000028:                                                                                                  ## This source code has been transcribed or otherwise adapted from
047648,000029:                                                                                                  ## digitized images of a hardcopy from the MIT Museum.  The digitization
047649,000030:                                                                                                  ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
047650,000031:                                                                                                  ## the Museum.  Many thanks to both.  The images (with suitable reduction
047651,000032:                                                                                                  ## in storage size and consequent reduction in image quality as well) are
047652,000033:                                                                                                  ## available online at www.ibiblio.org/apollo.  If for some reason you
047653,000034:                                                                                                  ## find that the images are illegible, contact me at info@sandroid.org
047654,000035:                                                                                                  ## about getting access to the (much) higher-quality images which Paul
047655,000036:                                                                                                  ## actually created.
047656,000037:                                                                                                  ##
047657,000038:                                                                                                  ## The code has been modified to match LMY99 Revision 0, otherwise
047658,000039:                                                                                                  ## known as Luminary Revision 99, the Apollo 11 software release preceeding
047659,000040:                                                                                                  ## the listing from which it was transcribed. It has been verified to
047660,000041:                                                                                                  ## contain the same bank checksums as AGC developer Allan Klumpp's listing
047661,000042:                                                                                                  ## of Luminary Revision 99 (for which we do not have scans).
047662,000043:                                                                                                  ##
047663,000044:                                                                                                  ## Notations on Allan Klumpp's listing read, in part:
047664,000045:                                                                                                  ##
047665,000046:                                                                                                  ##      ASSEMBLE REVISION 099 OF AGC PROGRAM LUMINARY BY NASA 2021112-51
047666,000047: 

Page 1095

047668,000049:    4732                                           BLOCK    02                                    
047669,000050:    4732                                           COUNT*   $$/FCONS                              
047670,000051: 
047671,000052:                                                                                                  #  THE FOLLOWING TABLE OF 18 VALUES IS INDEXED.  DO NOT INSERT OR REMOVE ANY QUANTITIES.
047672,000053: 
047673,000054:    4732           37777        DPOSMAX            OCT      37777                                 #  MUST PRECEDE POSMAX
047674,000055:    4733           37777        POSMAX             OCT      37777                                 
047675,000056: 
047676,000057:    4734     4734               LIMITS             =        NEG1/2                                
047677,000058: 
047678,000059:    4734           57777        NEG1/2             OCT      -20000                                #  USED BY SIN ROUTINE (MUST BE TWO 
047679,000060:                                                                                                  #  LOCATIONS IN FRONT OF BIT14)
047680,000061: 
047681,000062:                                                                                                  #  BIT TABLE                                     
047682,000063: 
047683,000064:    4735           40000        BIT15              OCT      40000                                 
047684,000065:    4736           20000        BIT14              OCT      20000                                 
047685,000066:    4737           10000        BIT13              OCT      10000                                 
047686,000067:    4740           04000        BIT12              OCT      04000                                 
047687,000068:    4741           02000        BIT11              OCT      02000                                 
047688,000069:    4742           01000        BIT10              OCT      01000                                 
047689,000070:    4743           00400        BIT9               OCT      00400                                 
047690,000071:    4744           00200        BIT8               OCT      00200                                 
047691,000072:    4745           00100        BIT7               OCT      00100                                 
047692,000073:    4746           00040        BIT6               OCT      00040                                 
047693,000074:    4747           00020        BIT5               OCT      00020                                 
047694,000075:    4750           00010        BIT4               OCT      00010                                 
047695,000076:    4751           00004        BIT3               OCT      00004                                 
047696,000077:    4752           00002        BIT2               OCT      00002                                 
047697,000078:    4753           00001        BIT1               OCT      00001                                 
047698,000079: 
047699,000080:                                                                                                  #  DO NOT DESTROY THIS COMBINATION, SINCE IT IS USED IN DOUBLE PRECISION INSTRUCTIONS.
047700,000081:    4754           77777        NEG0               OCT      -0                                    #  MUST PRECEDE ZERO
047701,000082:    4755           00000        ZERO               OCT      0                                     #  MUST FOLLOW NEG0
047702,000083:                                                                                                  #  BIT1          OCT     00001
047703,000084:                                                                                                  #  NO.WDS        OCT     2               INTERPRETER
047704,000085:                                                                                                  #  OCTAL3        OCT     3               INTERPRETER
047705,000086:                                                                                                  #  R3D1          OCT     4               PINBALL
047706,000087:    4756           00005        FIVE               OCT      5                                     
047707,000088:                                                                                                  #  REVCNT        OCT     6               INTERPRETER
047708,000089:    4757           00007        SEVEN              OCT      7                                     
047709,000090:                                                                                                  #  BIT4          OCT     00010
047710,000091:                                                                                                  #  R2D1          OCT     11              PINBALL
047711,000092:    4760     4320               OCT11              =        R2D1                                  #  P20S
047712,000093:                                                                                                  #  BINCON        DEC     10              PINBALL         (OCTAL 12)
047713,000094:    4760           00013        ELEVEN             DEC      11         B-14                       
047714,000095:                                                                                                  #  OCT14         OCT     14              ALARM AND ABORT (FILLER)
047715,000096:    4761           00015        OCT15              OCT      15                                    
047716,000097:                                                                                                  #  R1D1          OCT     16              PINBALL
047717,000098:    4762           00017        LOW4               OCT      17                                    

Page 1096

047719,000100:                                                                                                  #  BIT5          OCT     00020
047720,000101:                                                                                                  #  ND1           OCT     21              PINBALL
047721,000102:                                                                                                  #  VD1           OCT     23              PINBALL
047722,000103:                                                                                                  #  OCT24         OCT     24              SERVICE ROUTINES
047723,000104:                                                                                                  #  MD1           OCT     25              PINBALL
047724,000105:    4763           00030        BITS4&5            OCT      30                                    
047725,000106:                                                                                                  #  OCT31         OCT     31              SERVICE ROUTINES
047726,000107:    4764           00033        OCT33              OCT      33                                    
047727,000108:    4765     4764               DEC27              =        OCT33                                 
047728,000109:    4765           00035        OCT35              OCT      35                                    
047729,000110:    4766     4765               DEC29              =        OCT35                                 
047730,000111:    4766           00032        CALLCODE           OCT      00032                                 
047731,000112:                                                                                                  #  LOW5          OCT     37              PINBALL
047732,000113:                                                                                                  #  33DEC         DEC     33              PINBALL         (OCTAL 41)
047733,000114:                                                                                                  #  34DEC         DEC     34              PINBALL         (OCTAL 42)
047734,000115:    4767           00045        TBUILDFX           DEC      37         B-14                       #  BUILDUP FOR CONVIENCE IN DAPTESTING
047735,000116:    4770           00046        TDECAYFX           DEC      38         B-14                       #  CONVENIENCE FOR DAPTESTING
047736,000117:                                                                                                  #  BIT6          OCT     00040
047737,000118:    4771           00050        OCT50              OCT      50                                    
047738,000119:    4772           00055        DEC45              DEC      45         B-14                       
047739,000120:    4773           00060        SUPER011           OCT      60                                    #  BITS FOR SUPERBNK SETTING 011.
047740,000121:    4774           00062        .5SEC              DEC      50         B-14                       
047741,000122:                                                                                                  #  BIT7          OCT     00100
047742,000123: 
047743,000124:    4775     4745               SUPER100           =        BIT7                                  #  BITS FOR SUPERBNK SETTING 100
047744,000125:                                                                                                  #  (LAST 4K OF ROPE)
047745,000126:    4775           00120        SUPER101           OCT      120                                   #  BITS FOR SUPERBNK SETTING 101
047746,000127:                                                                                                  #  OCT121        OCT     121             SERVICE ROUTINES
047747,000128:                                                                                                  #  (FIRST 8K OF ACM)
047748,000129:    4776           00140        SUPER110           OCT      140                                   #  BITS FOR SUPERBNK SETTING 110.
047749,000130:                                                                                                  #  (LAST 8K OF ACM)
047750,000131:    4777           00144        1SEC               DEC      100        B-14                       
047751,000132:                                                                                                  #  LOW7          OCT     177             INTERPRETER
047752,000133:                                                                                                  #  BIT8          OCT     00200
047753,000134:                                                                                                  #  OT215         OCT     215             ALARM AND ABORT
047754,000135:                                                                                                  #  8,5           OCT     00220           P20-P25 SUNDANCE
047755,000136:    5000           00310        2SECS              DEC      200        B-14                       
047756,000137:                                                                                                  #  LOW8          OCT     377             PINBALL
047757,000138:                                                                                                  #  BIT9          OCT     00400
047758,000139:    5001           00401        GN/CCODE           OCT      00401                                 #  SET S/C CONTROL SWITCH TO G/N
047759,000140:    5002           00454        3SECS              DEC      300        B-14                       
047760,000141:    5003           00620        4SECS              DEC      400        B-14                       
047761,000142:    5004           00777        LOW9               OCT      777                                   
047762,000143:                                                                                                  #  BIT10         OCT     01000
047763,000144:                                                                                                  #  5.5DEGS       DEC     .03056          P20-P25 SUNDANCE        (OCTAL 00765)
047764,000145:                                                                                                  #  OCT1103       OCT     1103            ALARM AND ABORT
047765,000146:    5005           01124        C5/2               DEC      .0363551                              #                        (OCTAL 01124)
047766,000147:    5006           01211        V05N09             VN       0509                                  #  (SAME AS OCTAL 1211)
047767,000148:    5007           01400        OCT1400            OCT      01400                                 
047768,000149:    5010           01426        V06N22             VN       0622                                  

Page 1097

047770,000151:                                                                                                  #  MID5          OCT     1740            PINBALL
047771,000152:    5011           01776        BITS2-10           OCT      1776                                  
047772,000153:    5012           01777        LOW10              OCT      1777                                  
047773,000154:                                                                                                  #  BIT11         OCT     02000
047774,000155:                                                                                                  #  2K+3          OCT     2003            PINBALL
047775,000156:    5013           02177        LOW7+2K            OCT      2177                                  #  OP CODE MASK + BANK 1 FBANK SETTING.
047776,000157:    5014           02400        EBANK5             OCT      02400                                 
047777,000158:    5015           03000        PRIO3              OCT      03000                                 
047778,000159:    5016           03400        EBANK7             OCT      03400                                 
047779,000160:                                                                                                  #  LOW11         OCT     3777            PINBALL
047780,000161:                                                                                                  #  BIT12         OCT     04000
047781,000162:                                                                                                  #  RELTAB        OCT     04025           T4RUPT
047782,000163:    5017           05000        PRIO5              OCT      05000                                 
047783,000164:    5020           06000        PRIO6              OCT      06000                                 
047784,000165:    5021           07000        PRIO7              OCT      07000                                 
047785,000166: 
047786,000167:                                                                                                  #  BIT13         OCT     10000
047787,000168:                                                                                                  #                OCT     10003           T4RUPT  RELTAB +1D
047788,000169:                                                                                                  #  13,7,2        OCT     10102           P20-P25 SUNDANCE
047789,000170:    5022           11000        PRIO11             OCT      11000                                 
047790,000171:                                                                                                  #  PRIO12        OCT     12000           BANKCALL
047791,000172:    5023           13000        PRIO13             OCT      13000                                 
047792,000173:    5024           14000        PRIO14             OCT      14000                                 
047793,000174:                                                                                                  #                OCT     14031           T4RUPT  RELTAB +2D
047794,000175:    5025           15000        PRIO15             OCT      15000                                 
047795,000176:    5026           16000        PRIO16             OCT      16000                                 
047796,000177:                                                                                                  #  85DEGS        DEC     .45556          P20-P25 SUNDANCE        (OCTAL 16450)
047797,000178:    5027           17000        PRIO17             OCT      17000                                 
047798,000179:    5030           17770        OCT17770           OCT      17770                                 
047799,000180:                                                                                                  #  BIT14         OCT     20000
047800,000181:                                                                                                  #                OCT     20033           T4RUPT  RELTAB +3D
047801,000182:    5031           21000        PRIO21             OCT      21000                                 
047802,000183:    7710                                           BLOCK    03                                    
047803,000184:    7710                                           COUNT*   $$/FCONS                              
047804,000185:    7710           22000        PRIO22             OCT      22000                                 #  SERVICE ROUTINES
047805,000186:    7711           23000        PRIO23             OCT      23000                                 
047806,000187:    7712           24000        PRIO24             OCT      24000                                 
047807,000188:                                                                                                  #  5/8+1         OCT     24001           SINGLE PRECISION SUBROUTINES
047808,000189:                                                                                                  #                OCT     24017           T4RUPT  RELTAB +4D
047809,000190:    7713           25000        PRIO25             OCT      25000                                 
047810,000191:    7714           26000        PRIO26             OCT      26000                                 
047811,000192:    7715           27000        PRIO27             OCT      27000                                 
047812,000193:                                                                                                  #  CHRPRIO       OCT     30000           PINBALL
047813,000194:                                                                                                  #                OCT     30036           T4RUPT  RELTAB +5D
047814,000195:    7716           31000        PRIO31             OCT      31000                                 
047815,000196:    7717           31103        C1/2               DEC      .7853134                              #                        (OCTAL 31103)
047816,000197:    7720           32000        PRIO32             OCT      32000                                 
047817,000198:    7721           33000        PRIO33             OCT      33000                                 
047818,000199:    7722           34000        PRIO34             OCT      34000                                 
047819,000200:                                                                                                  #                OCT     34034           T4RUPT  RELTAB +6D              

Page 1098

047821,000202:    7723           35000        PRIO35             OCT      35000                                 
047822,000203:    7724           36000        PRIO36             OCT      36000                                 
047823,000204:    7725           37000        PRIO37             OCT      37000                                 
047824,000205:    7726           37401        63/64+1            OCT      37401                                 
047825,000206:                                                                                                  #  MID7          OCT     37600           PINBALL
047826,000207:    7727           37766        OCT37766           OCT      37766                                 
047827,000208:    7730           37774        OCT37774           OCT      37774                                 
047828,000209:    7731           37776        OCT37776           OCT      37776                                 
047829,000210:                                                                                                  #  DPOSMAX       OCT     37777
047830,000211:                                                                                                  #  BIT15         OCT     40000
047831,000212:                                                                                                  #  OCT40001      OCT     40001           INTERPRETER (CS 1 INSTRUCTION)
047832,000213:    7732           40014        DLOADCOD           OCT      40014                                 
047833,000214:    7733           40015        DLOAD*             OCT      40015                                 
047834,000215:                                                                                                  #                OCT     40023           T4RUPT  RELTAB +7D
047835,000216:    7734           40040        BIT15+6            OCT      40040                                 
047836,000217:    7735           40200        OCT40200           OCT      40200                                 
047837,000218:                                                                                                  #                OCT     44035           T4RUPT  RELTAB +8D
047838,000219:                                                                                                  #                OCT     50037           T4RUPT  RELTAB +9D
047839,000220:                                                                                                  #                OCT     54000           T4RUPT  RELTAB +10D
047840,000221:    7736           57777        -BIT14             OCT      57777                                 
047841,000222:                                                                                                  #  RELTAB11      OCT     60000           T4RUPT
047842,000223:    7737           65552        C3/2               DEC      -.3216147                             #                        (OCTAL 65552)
047843,000224:    7740           70000        13,14,15           OCT      70000                                 
047844,000225:    7741           73777        -1/8               OCT      73777                                 
047845,000226:    7742           74000        HIGH4              OCT      74000                                 
047846,000227:    7743           74056        -ENDERAS           DEC      -2001      B-14                       #                        (OCTAL 74056)
047847,000228:                                                                                                  #  HI5           OCT     76000           PINBALL
047848,000229:    7744           77700        HIGH9              OCT      77700                                 
047849,000230:                                                                                                  #  -ENDVAC       DEC     -45             INTERPRETER             (OCTAL 77722)
047850,000231:                                                                                                  #  -OCT10        OCT     -10                                      (OCT 77767)
047851,000232:                                                                                                  #  NEG4          DEC     -4                                      (OCTAL 77773)
047852,000233:    7745           77774        NEG3               DEC      -3         B-14                       
047853,000234:    7746           77775        NEG2               OCT      77775                                 
047854,000235:    7747           77776        NEGONE             DEC      -1         B-14                       
047855,000236: 

Page 1099

047857,000238: 
047858,000239:                                                                                                  #  DEFINED BY EQUALS
047859,000240: 
047860,000241:                                                                                                  #  IT WOULD BE TO THE USERS ADVANTAGE TO OCCASIONALLY CHECK ANY OF THESE SYMBOLS IN ORDER TO PREVENT ANY
047861,000242:                                                                                                  #  ACCIDENTAL DEFINITION CHANGES.
047862,000243: 
047863,000244:    7750     7747               MINUS1             =        NEG1                                  
047864,000245:    7750     7747               NEG1               =        NEGONE                                
047865,000246:    7750     4753               ONE                =        BIT1                                  
047866,000247:    7750     4752               TWO                =        BIT2                                  
047867,000248:    7750     6245               THREE              =        OCTAL3                                
047868,000249:    7750     6245               LOW2               =        THREE                                 
047869,000250:    7750     4751               FOUR               =        BIT3                                  
047870,000251:    7750     6242               SIX                =        REVCNT                                
047871,000252:    7750     4757               LOW3               =        SEVEN                                 
047872,000253:    7750     4750               EIGHT              =        BIT4                                  
047873,000254:    7750     4320               NINE               =        R2D1                                  
047874,000255:    7750     4363               TEN                =        BINCON                                
047875,000256:    7750     4760               NOUTCON            =        ELEVEN                                
047876,000257:    7750     4360               OCT23              =        VD1                                   
047877,000258:    7750     4362               OCT25              =        MD1                                   
047878,000259:    7750     4742               PRIO1              =        BIT10                                 
047879,000260:    7750     5007               EBANK3             =        OCT1400                               
047880,000261:    7750     4741               PRIO2              =        BIT11                                 
047881,000262:    7750     4775               OCT120             =        SUPER101                              
047882,000263:    7750     4776               OCT140             =        SUPER110                              
047883,000264:    7750     4741               2K                 =        BIT11                                 
047884,000265:    7750     4741               EBANK4             =        BIT11                                 
047885,000266:    7750     4740               PRIO4              =        BIT12                                 
047886,000267:    7750     5015               EBANK6             =        PRIO3                                 
047887,000268:    7750     4737               QUARTER            =        BIT13                                 
047888,000269:    7750     4737               PRIO10             =        BIT13                                 
047889,000270:    7750     7663               OCT10001           =        CCSL                                  
047890,000271:    7750     4736               POS1/2             =        HALF                                  
047891,000272:    7750     4736               PRIO20             =        BIT14                                 
047892,000273:    7750     4736               HALF               =        BIT14                                 
047893,000274:    7750     4355               PRIO30             =        CHRPRIO                               
047894,000275:    7750     4355               BIT13-14           =        PRIO30                                #  INTERPRETER USES IN PROCESSING STORECODE
047895,000276:    7750     6471               OCT30002           =        TLOAD      +1                         
047896,000277:    7750     7722               B12T14             =        PRIO34                                
047897,000278:    7750     4735               NEGMAX             =        BIT15                                 
047898,000279:    7750     4735               VLOADCOD           =        BIT15                                 
047899,000280:    7750     6107               VLOAD*             =        OCT40001                              
047900,000281:    7750     4101               OCT60000           =        RELTAB11                              
047901,000282:    7750     4350               BANKMASK           =        HI5                                   
047902,000283: 

End of include-file FIXED-FIXED_CONSTANT_POOL.agc.  Parent file is MAIN.agc