Source Code

These source-code files were derived from scans of the Colossus 237 (Apollo 8 Command Module) program listing from the private collection of original AGC developer Fred Martin. Scanning was by Ron Burkey. Pre-existing Colossus 249 (Apollo 9 CM) source files were used as a template, and changes between Colossus 249 and Colossus 237 were manually transcribed by a team of volunteers. Note that the page images presented online are of reduced quality, and that additional images are available. Report any conversion errors or legibility problems in page images to info@sandroid.org. Notations on the program listing read, in part:

	GAP: ASSEMBLE REVISION 237 OF AGC PROGRAM COLOSSUS 
	BY NASA 2021111-031  1:17 AUG. 24, 1968
Note that the date is the date of the printout, not the date of the program revision.

021830,000002:                                                                                                  ## Copyright:   Public domain.
021831,000003:                                                                                                  ## Filename:    R30.agc
021832,000004:                                                                                                  ## Purpose:     Part of the source code for Colossus build 237.
021833,000005:                                                                                                  ##              This is for the Command Module's (CM) Apollo Guidance
021834,000006:                                                                                                  ##              Computer (AGC), for Apollo 8.
021835,000007:                                                                                                  ## Assembler:   yaYUL
021836,000008:                                                                                                  ## Contact:     Jim Lawton <jim DOT lawton AT gmail DOT com>
021837,000009:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
021838,000010:                                                                                                  ## Page Scans:  www.ibiblio.org/apollo/ScansForConversion/Colossus237/
021839,000011:                                                                                                  ## Mod history: 2011-02-05 JL   Adapted from corresponding Colossus 249 file.
021840,000012:                                                                                                  ##              2016-12-31 RSB  Proofed comment text using octopus/ProoferComments,
021841,000013:                                                                                                  ##                              and corrected errors found.
021842,000014:                                                                                                  ##              2017-01-01 RSB  Proofed comment text using octopus/ProoferComments,
021843,000015:                                                                                                  ##                              and fixed errors found.
021844,000016:                                                                                                  ##              2017-02-08 RSB  Comment-text fixes discovered while proofing Artemis 72.
021845,000017: 

Page 503

021847,000019:                                                                                                  #  SUBROUTINE NAME:  V82CALL
021848,000020:                                                                                                  #  MOD NO:  0                                                              DATE:           16 FEB 67
021849,000021:                                                                                                  #  MOD BY:  RR BAIRNSFATHER                                                LOG SECTION:    R30
021850,000022:                                                                                                  #  MOD NO: 1            MOD BY: RR BAIRNSFATHER       DATE: 11 APR 67      SR30.1 CHANGED TO ALLOW MONITOR OPERN
021851,000023:                                                                                                  #  MOD  NO: 2           MOD  BY ALONSO                DATE : 11 DEC 67     VB82 PROGRAM REWRITTEN
021852,000024:                                                                                                  #  MOD NO: 3            MOD  BY ALONSO                DATE: 26 MAR 68      PROG MOD TO HANDLE DIF EARTH/MOON SCALE
021853,000025:                                                                                                  #   NEW FUNCTIONAL DESCRIPTION:    CALLED BY VERB 82 ENTER.  PRIORITY 10
021854,000026:                                                                                                  #    USED THROUGHOUT.              CALCULATE AND DISPLAY ORBITAL PARAMETERS
021855,000027: 
021856,000028:                                                                                                  #  1. IF AVERAGE G IS OFF:
021857,000029:                                                                                                  #           FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
021858,000030:                                                                                                  #            TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
021859,000031:                                                                                                  #            CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
021860,000032:                                                                                                  #           SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
021861,000033:                                                                                                  #           CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
021862,000034:                                                                                                  #            RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
021863,000035:                                                                                                  #            HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
021864,000036:                                                                                                  #            HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
021865,000037:                                                                                                  #            INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
021866,000038:                                                                                                  #           FLASH MONITOR V16N44 (HAPO, HPER, TFF).TFF IS -59M59S IF IT WAS
021867,000039:                                                                                                  #            NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
021868,000040:                                                                                                  #            ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
021869,000041:                                                                                                  #            DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
021870,000042:                                                                                                  #            ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
021871,000043: 
021872,000044:                                                                                                  #  2. IF AVERAGE G IS ON:
021873,000045:                                                                                                  #           CALLS SR30.1 APPROX EVERY TWO SECS.  STATE VECTOR IS ALWAYS
021874,000046:                                                                                                  #            FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR.  RESULTS
021875,000047:                                                                                                  #            OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
021876,000048:                                                                                                  #           FLASH MONITOR V16N44 (HAPO, HPER, TFF).
021877,000049:                                                                                                  #           IF MODE IS P11, THEN CALL DELRSPL SO ASTRONAUT CAN MONITOR
021878,000050:                                                                                                  #            RESULTS BY N50E. SPLASH COMPUTATION DONE ONCE PER TWO SECS.
021879,000051: 
021880,000052: 
021881,000053:                                                                                                  #  ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
021882,000054:                                                                                                  #            ABOVE REMARKS.
021883,000055: 
021884,000056:                                                                                                  #  CALLING SEQUENCE:  VERB 82 ENTER.
021885,000057: 
021886,000058: 
021887,000059:                                                                                                  #  SUBROUTINES CALLED:  SR30.1, GOXDSPF
021888,000060:                                                                                                  #                       MAYBE - THISPREC , OTHPREC, LOADTIME, DELRSPL
021889,000061:                                                                                                  #  NORMAL EXIT MODES:  TC ENDEXT
021890,000062: 
021891,000063:                                                                                                  #  ALARMS:  NONE
021892,000064: 
021893,000065:                                                                                                  #  OUTPUT:  HAPOX    (-29) M
021894,000066:                                                                                                  #           HPERX    (-29) M
021895,000067:                                                                                                  #           RAPO     (-29) M EARTH
021896,000068:                                                                                                  #                    (-27) M MOON

Page 504

021898,000070:                                                                                                  #           RPER     (-29) M EARTH
021899,000071:                                                                                                  #                    (-27) M MOON
021900,000072:                                                                                                  #           TFF      (-28) CS      CONTAINS NEGATIVE QUANTITY
021901,000073:                                                                                                  #           -TPER    (-28) CS      CONTAINS NEGATIVE QUANTITY
021902,000074:                                                                                                  #           RSP-RREC (-29) M       IF DELRSPL CALLED
021903,000075: 
021904,000076:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
021905,000077: 
021906,000078:                                                                                                  #  DEBRIS:  QPRET, RONE, VONE,TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
021907,000079:                                                                                                  #           MAYBE: TSTART82, V82FLAGS, TDEC1.
021908,000080: 
021909,000081: 
021910,000082: 13,2176  E4,1751                                  EBANK=   HAPOX                                 
021911,000083: 31,2021                                           BANK     31                                    
021912,000084: 23,2000                                           SETLOC   R30LOC                                
021913,000085: 23,2000                                           BANK                                           
021914,000086: 23,2332                                           COUNT*   $$/R30                                
021915,000087: 
021916,000088: 23,2332           06006        V82CALL            TC       INTPRET                               
021917,000089: 23,2333           52014                           BON      GOTO                                  
021918,000090: 23,2334           00716                                    AVEGFLAG                              
021919,000091: 23,2335           46566                                    V82GON                                #  IF AVERAGE G ON
021920,000092: 23,2336           46337                                    V82GOFF                               #  IF AVERAGE G OFF
021921,000093: 
021922,000094: 
021923,000095: 23,2337           77776        V82GOFF            EXIT                                           #  ALLOW ASTRONAUT TO SELECT VEHICLE
021924,000096: 23,2340           34711                           CAF      TWO                                   #  DESIRED FOR ORBITAL PARAMETERS
021925,000097: 23,2341           55131                           TS       OPTION1                               #  CALCULATION AND DISPLAY.      
021926,000098: 23,2342           34712                           CAF      ONE                                   
021927,000099: 23,2343           55132                           TS       OPTION1    +1                         
021928,000100: 23,2344           32406                           CAF      OPTIONVN                              #  V 04 N 06
021929,000101: 23,2345           04555                           TC       BANKCALL                              
021930,000102: 23,2346           20465                           CADR     GOXDSPF                               
021931,000103: 23,2347           05423                           TC       ENDEXT                                #  TERMINATE
021932,000104: 23,2350           02352                           TC       +2                                    #  PROCEED
021933,000105: 23,2351           02344                           TC       -5                                    #  DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
021934,000106:                                                                                                  #                 UNEQ 1 FOR OTHER VEHICLE.
021935,000107: 23,2352           34707                           CAF      BIT4                                  #  80 MS
021936,000108: 23,2353           05140                           TC       WAITLIST                              
021937,000109: 23,2354  E4,1743                                  EBANK=   TFF                                   
021938,000110: 23,2354           02531 46064                     2CADR    TICKTEST                              
021939,000111: 23,2356           00003                           RELINT                                         
021940,000112: 23,2357           32410        V82GOFLP           CAF      TFFBANK                               #  MAJOR RECYCLE LOOP ENTRY
021941,000113: 23,2360           54003                           TS       EBANK                                 
021942,000114: 23,2361           34714                           CAF      ZERO                                  
021943,000115: 23,2362           55742                           TS       V82FLAGS                              #  ZERO FLAGS FOR TICKTEST. INHIBITS
021944,000116:                                                                                                  #                                          DECREMENTING OF TFF AND -TPER.
021945,000117: 23,2363           34756                           CAF      PRIO7                                 
021946,000118: 23,2364           05042                           TC       FINDVAC                               #  V82GOFF1 WILL EXECUTE STATE VECTOR

Page 505

021948,000120: 23,2365  E4,1743                                  EBANK=   TFF                                   #  UPDATE AND ORBIT CALCULATIONS FOR
021949,000121: 23,2365           02411 46064                     2CADR    V82GOFF1                              #  SELECTED VEHICLE ABOUT PROPER BODY.
021950,000122: 23,2367           00003                           RELINT                                         
021951,000123: 23,2370           36214        V82STALL           CAF      THREE                                 #  STALL IN THIS LOOP AND WITHOLD V 16 N 44
021952,000124: 23,2371           71742                           MASK     V82FLAGS                              #  UNTIL STATE VECTOR UPDATE SETS ONE OF
021953,000125: 23,2372           10000                           CCS      A                                     #  OUR FLAG BITS.
021954,000126: 23,2373           02400                           TC       FLAGGON                               #  EXIT FROM STALL LOOP.
021955,000127: 23,2374           34734                           CAF      1SEC                                  
021956,000128: 23,2375           04555                           TC       BANKCALL                              
021957,000129: 23,2376           01730                           CADR     DELAYJOB                              
021958,000130: 23,2377           02370                           TC       V82STALL                              
021959,000131: 
021960,000132: 23,2400           32407        FLAGGON            CAF      V16N44                                #  MONITOR HAPO,HPER,TFF.
021961,000133: 23,2401           04555                           TC       BANKCALL                              
021962,000134: 23,2402           20465                           CADR     GOXDSPF                               
021963,000135: 23,2403           05514                           TC       B5OFF                                 #  TERM  THIS TELLS TICKTEST TO KILL ITSELF
021964,000136: 23,2404           05514                           TC       B5OFF                                 #  PROCEED  DITTO
021965,000137: 23,2405           02357                           TC       V82GOFLP                              #  RECYCLE  RECOMPUTE STATE VECT + DISPLAY
021966,000138: 
021967,000139: 23,2406           01006        OPTIONVN           VN       0406                                  
021968,000140: 23,2407           04054        V16N44             VN       1644                                  
021969,000141: 23,2410           02343        TFFBANK            ECADR    TFF                                   
021970,000142: 
021971,000143: 
021972,000144: 23,2411           06006        V82GOFF1           TC       INTPRET                               
021973,000145: 23,2412           77634                           RTB                                            
021974,000146: 23,2413           45505                                    LOADTIME                              
021975,000147: 23,2414           00041                           STORE    TDEC1                                 #  TIME FOR STATE VECTOR UPDATE.
021976,000148: 23,2415           02325                           STORE    TSTART82                              #  TIME FOR INTERNAL USE.
021977,000149: 23,2416           77776                           EXIT                                           
021978,000150: 23,2417           41132                           CS       OPTION1    +1                         #  1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
021979,000151: 23,2420           64712                           AD       ONE                                   
021980,000152: 23,2421           00006                           EXTEND                                         
021981,000153: 23,2422           12446                           BZF      THISSHIP                              
021982,000154: 23,2423           06006        OTHSHIP            TC       INTPRET                               
021983,000155: 23,2424           77624                           CALL                                           #  CALL STATE VECTOR UPDATE FOR OTHER SHIP.
021984,000156: 23,2425           27036                                    OTHPREC                               
021985,000157: 23,2426           77775        BOTHSHIP           VLOAD                                          #  MOVE RESULTS INTO TFFCONIC STORAGE AREAS
021986,000158: 23,2427           00001                                    RATT                                  #   TO BE CALLED BY SR30.1.
021987,000159: 23,2430           26327                           STOVL    RONE                                  #  RATT AT (-29)M FOR EARTH OR MOON
021988,000160: 23,2431           00007                                    VATT                                  
021989,000161: 23,2432           02335                           STORE    VONE                                  #   VATT AT (-7)M/CS FOR EARTH OR MOON
021990,000162: 23,2433           77743                           DLOAD*                                         
021991,000163: 23,2434           71321                                    1/RTMUE,2                             #   X2 IS 0 FOR EARTH CENTERED STATE VEC
021992,000164: 23,2435           00037                           STORE    TFF/RTMU                              #   X2 IS 2 FOR MOON
021993,000165: 23,2436           77743                           DLOAD*                                         #  AS LEFT BY THISPREC OR OTHPREC.
021994,000166: 23,2437           71315                                    MINPERE,2                             
021995,000167: 23,2440           02321                           STORE    HPERMIN                               #    TFFRTMU, HPERMIN AND RPADTEM ARE ALL
021996,000168: 23,2441           46135                           SLOAD    BHIZ                                  #  EARTH/MOON PARAMETERS AS SET HERE.

Page 506

021998,000170: 23,2442           00050                                    X2                                    
021999,000171: 23,2443           46463                                    EARTHPAD                              
022000,000172: 23,2444           77650                           GOTO                                           
022001,000173: 23,2445           46467                                    MOONPAD                               
022002,000174: 
022003,000175: 23,2446           06006        THISSHIP           TC       INTPRET                               
022004,000176: 23,2447           77624                           CALL                                           #  CALL STATE VECTOR UPDATE FOR THIS SHIP.
022005,000177: 23,2450           27022                                    THISPREC                              
022006,000178: 23,2451           77650                           GOTO                                           
022007,000179: 23,2452           46426                                    BOTHSHIP                              
022008,000180: 
022009,000181:                                                                                                  #  THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
022010,000182: 
022011,000183: 23,2453           27533 07571  1/RTMUM            2DEC*    .45162595  E-4        B14*            
022012,000184: 23,2455           25004 06702  1/RTMUE            2DEC*    .50087529  E-5        B17*            
022013,000185: 23,2457           00001 11530  MINPERM            2DEC     10668      B-27                       #  35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
022014,000186: 23,2461           00002 31230  MINPERE            2DEC     91440      B-29                       #  300 KFT (-29)M FOR EARTH
022015,000187: 
022016,000188: 23,2463           43145        EARTHPAD           DLOAD    CLRGO                                 #   PAD 37-B RADIUS.  SCALED AT (-29)M.
022017,000189: 23,2464           05311                                    RPAD                                  
022018,000190: 23,2465           04622                                    V82EMFLG                              #   INDICATE EARTH SCALING FOR SR30.1
022019,000191: 23,2466           46473                                    BOTHPAD                               
022020,000192: 
022021,000193: 23,2467           51575        MOONPAD            VLOAD    ABVAL                                 #  COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
022022,000194: 23,2470           02026                                    RLS                                   #   SCALED AT (-27)M.
022023,000195: 23,2471           77614                           SET                                            
022024,000196: 23,2472           04462                                    V82EMFLG                              #   INDICATE MOON SCALING FOR SR30.1
022025,000197: 23,2473           36323        BOTHPAD            STCALL   RPADTEM                               
022026,000198: 23,2474           46667                                    SR30.1                                #  CALCULATE ORBITAL PARAMETERS
022027,000199: 23,2475           77776                           EXIT                                           
022028,000200: 23,2476           31011                           CA       MODREG                                #  ARE WE IN POO
022029,000201: 23,2477           00006                           EXTEND                                         
022030,000202: 23,2500           12645                           BZF      CANDEL                                #  YES, DO DELRSPL
022031,000203: 23,2501           06006        SPLRET1            TC       INTPRET                               
022032,000204: 23,2502           45234                           RTB      DSU                                   
022033,000205: 23,2503           45505                                    LOADTIME                              
022034,000206: 23,2504           02325                                    TSTART82                              #  PRESENT TIME - TIME V82GOFF1 BEGAN
022035,000207: 23,2505           02325                           STORE    TSTART82                              #                 SAVE IT
022036,000208: 23,2506           53145                           DLOAD    BZE                                   #  SR30.1 SETS -TPER=0 IF HPER L/
022037,000209: 23,2507           02346                                    -TPER                                 #   HPERMIN (300 OR 35) KFT.
022038,000210: 23,2510           46521                                    TICKTFF                               #  (-TPER = 0)
022039,000211: 23,2511           43345        TICKTPER           DLOAD    DAD                                   #  (-TPER NON ZERO)  TFF WAS NOT COMPUTED,
022040,000212: 23,2512           02346                                    -TPER                                 #  BUT WAS SET TO 59M59S.DONT TICK TFF, DO
022041,000213: 23,2513           02325                                    TSTART82                              #  TICK -TPER. DISPLAY BOTH.
022042,000214: 23,2514           02346                           STORE    -TPER                                 #  -TPER CORRECTED FOR TIME SINCE V82GOFF1
022043,000215: 23,2515           77776                           EXIT                                           #  BEGAN.
022044,000216: 

Page 507

022046,000218: 23,2516           34712                           CAF      BIT1                                  
022047,000219: 23,2517           55742                           TS       V82FLAGS                              #  INFORMS TICKTEST TO INCREMENT ONLY -TPER
022048,000220: 23,2520           05112                           TC       ENDOFJOB                              
022049,000221: 
022050,000222: 23,2521           43345        TICKTFF            DLOAD    DAD                                   #  (-TPER=0)  TFF WAS COMPUTED.TICK TFF.
022051,000223: 23,2522           02344                                    TFF                                   #  DO NOT TICK -TPER.DISPLAY TFF, BUT NOT
022052,000224: 23,2523           02325                                    TSTART82                              #  -TPER.
022053,000225: 23,2524           02344                           STORE    TFF                                   #  TFF CORRECTED FOR TIME SINCE V82GOFF1
022054,000226: 23,2525           77776                           EXIT                                           #  BEGAN.
022055,000227: 23,2526           34711                           CAF      BIT2                                  
022056,000228: 23,2527           55742                           TS       V82FLAGS                              #  INFORMS TICKTEST TO INCREMENT ONLY TFF.
022057,000229: 23,2530           05112                           TC       ENDOFJOB                              
022058,000230: 
022059,000231: 
022060,000232: 23,2531           34706        TICKTEST           CAF      BIT5                                  #  THIS WAITLIST PROGRAM PERPETUATES ITSELF
022061,000233: 23,2532           71044                           MASK     EXTVBACT                              #  ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022062,000234: 23,2533           10000                           CCS      A                                     
022063,000235: 23,2534           02542                           TC       DOTICK                                
022064,000236: 23,2535           37662                           CAF      PRIO25                                
022065,000237: 23,2536           05027                           TC       NOVAC                                 #  TERMINATE V 82.CANT CALL ENDEXT IN RUPT.
022066,000238: 23,2537     1044                                  EBANK=   EXTVBACT                              
022067,000239: 23,2537           05423 04062                     2CADR    ENDEXT                                
022068,000240: 23,2541           05213                           TC       TASKOVER                              
022069,000241: 23,2542           34734        DOTICK             CAF      1SEC                                  #  RE-REQUEST TICKTEST.
022070,000242: 23,2543           05140                           TC       WAITLIST                              
022071,000243: 23,2544  E4,1743                                  EBANK=   TFF                                   
022072,000244: 23,2544           02531 46064                     2CADR    TICKTEST                              
022073,000245: 23,2546           36214                           CAF      THREE                                 
022074,000246: 23,2547           71742                           MASK     V82FLAGS                              
022075,000247: 23,2550           50000                           INDEX    A                                     
022076,000248: 23,2551           02552                           TC       +1                                    
022077,000249: 23,2552           05213                           TC       TASKOVER                              #  IF NO FLAGBITS SET DONT CHANGE TFF OR
022078,000250:                                                                                                  #                                          -TPER, BUT CONTINUE LOOP.
022079,000251: 23,2553           02561                           TC       TPERTICK                              #  ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
022080,000252: 23,2554           34734        TFFTICK            CAF      1SEC                                  #  ONLY BIT 2 SET. INCR TFF BY 1 SEC.
022081,000253: 23,2555           54001                           TS       L                                     
022082,000254: 23,2556           34714                           CAF      ZERO                                  
022083,000255: 23,2557           21744                           DAS      TFF                                   
022084,000256: 23,2560           05213                           TC       TASKOVER                              
022085,000257: 23,2561           34734        TPERTICK           CAF      1SEC                                  
022086,000258: 23,2562           54001                           TS       L                                     
022087,000259: 23,2563           34714                           CAF      ZERO                                  
022088,000260: 23,2564           21746                           DAS      -TPER                                 
022089,000261: 23,2565           05213                           TC       TASKOVER                              
022090,000262: 

Page 508

022092,000264: 23,2566           77776        V82GON             EXIT                                           #   AVERAGE G ON. USE CURRENT STATE VECTOR
022093,000265:                                                                                                  #                                          FOR ORBITAL PARAMETER CALCULATIONS.
022094,000266: 23,2567           34756                           CAF      PRIO7                                 #  LESS THAN LAMBERT
022095,000267: 23,2570           05042                           TC       FINDVAC                               #  V82GON1 WILL PERFORM ORBIT CALCULATIONS
022096,000268: 23,2571  E4,1743                                  EBANK=   TFF                                   #  ABOUT PROPER BODY APPROX ONCE PER SEC.
022097,000269: 23,2571           02604 46064                     2CADR    V82GON1                               
022098,000270: 23,2573           00003                           RELINT                                         
022099,000271: 23,2574           10067                           CCS      NEWJOB                                #  WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
022100,000272: 23,2575           05057                           TC       CHANG1                                #  IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
022101,000273:                                                                                                  #                                          JOB) IS COMPLETED BEFORE V82GON (PRIO7,
022102,000274:                                                                                                  #                                          NOVAC JOB).
022103,000275: 23,2576           32407        V82REDSP           CAF      V16N44                                #  MONITOR HAPO, HPER, TFF
022104,000276: 23,2577           04555                           TC       BANKCALL                              
022105,000277: 23,2600           20465                           CADR     GOXDSPF                               
022106,000278: 23,2601           05514                           TC       B5OFF                                 #  TERM THIS TELLS V82GON1 TO KILL ITSELF.
022107,000279: 23,2602           05514                           TC       B5OFF                                 #  PROC DITTO.
022108,000280: 23,2603           02576                           TC       V82REDSP                              #  RECYCLE
022109,000281: 
022110,000282: 23,2604           06006        V82GON1            TC       INTPRET                               #  THIS EXEC PROGRAM PERPETUATES ITSELF
022111,000283:                                                                                                  #                                          ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022112,000284: 23,2605           52175                           VLOAD    GOTO                                  #  HOLDS OFF CCS NEWJOB BETWEEN RN AND
022113,000285: 23,2606           01171                                    RN                                    #    VN FETCH SO RN , VN ARE FROM SAME
022114,000286: 23,2607           46610                                    NEXTLINE                              #    STATE VECTOR UPDATE.
022115,000287: 23,2610           26327        NEXTLINE           STOVL    RONE                                  #   RN AT (-29)M FOR EARTH OR MOON
022116,000288: 23,2611           01177                                    VN                                    
022117,000289: 23,2612           02335                           STORE    VONE                                  #  VN AT (-7)M/CS FOR EARTH OR MOON
022118,000290: 23,2613           52014                           BON      GOTO                                  
022119,000291: 23,2614           04303                                    MOONTHIS                              #  FLAG INDICATES BODY ABOUT WHICH ORBITAL
022120,000292: 23,2615           46617                                    MOONGON                               #     CALCULATIONS ARE TO BE PERFORMED.
022121,000293: 23,2616           46630                                    EARTHGON                              #    IF SET - MOON , IF RESET - EARTH.
022122,000294: 
022123,000295: 23,2617           71214        MOONGON            SET      DLOAD                                 
022124,000296: 23,2620           04462                                    V82EMFLG                              #  INDICATE MOON SCALING FOR SR30.1
022125,000297: 23,2621           06454                                    1/RTMUM                               #  LUNAR PARAMETERS LOADED HERE FOR SR30.1
022126,000298: 23,2622           14037                           STODL    TFF/RTMU                              
022127,000299: 23,2623           06460                                    MINPERM                               
022128,000300: 23,2624           26321                           STOVL    HPERMIN                               
022129,000301: 23,2625           02026                                    RLS                                   #   SCALED AT (-27)M.
022130,000302: 23,2626           52046                           ABVAL    GOTO                                  
022131,000303: 23,2627           46637                                    V82GON2                               
022132,000304: 23,2630           71214        EARTHGON           CLEAR    DLOAD                                 
022133,000305: 23,2631           04662                                    V82EMFLG                              #  INDICATE EARTH SCALING FOR SR30.1
022134,000306: 23,2632           06456                                    1/RTMUE                               #  EARTH PARAMETERS LOADED HERE FOR SR30.1
022135,000307: 23,2633           14037                           STODL    TFF/RTMU                              
022136,000308: 23,2634           06462                                    MINPERE                               
022137,000309: 23,2635           16321                           STODL    HPERMIN                               
022138,000310: 23,2636           05311                                    RPAD                                  
022139,000311: 23,2637           36323        V82GON2            STCALL   RPADTEM                               #  COMMON CODE FOR EARTH & MOON.
022140,000312: 23,2640           46667                                    SR30.1                                

Page 509

022142,000314: 23,2641           77776                           EXIT                                           
022143,000315: 23,2642           05253                           TC       CHECKMM                               
022144,000316: 23,2643           00013                           DEC      11         B-14                       
022145,000317: 23,2644           02657                           TC       V82GON3                               #  NOT IN MODE 11.
022146,000318: 23,2645           06006        CANDEL             TC       INTPRET                               #  IN MODE 11 OR 00
022147,000319: 23,2646           77624                           CALL                                           
022148,000320: 23,2647           27371                                    INTSTALL                              #  DELRSPL DOES INTWAKE
022149,000321: 23,2650           45145                           DLOAD    CALL                                  
022150,000322: 23,2651           02344                                    TFF                                   
022151,000323: 23,2652           64017                                    DELRSPL                               #  RETURN IS TO NEXT LINE ( SPLRET ).
022152,000324: 23,2653           77776        SPLRET             EXIT                                           
022153,000325: 
022154,000326: 23,2654           31011                           CA       MODREG                                
022155,000327: 23,2655           00006                           EXTEND                                         
022156,000328: 23,2656           12501                           BZF      SPLRET1                               
022157,000329: 23,2657           34706        V82GON3            CAF      BIT5                                  
022158,000330: 23,2660           71044                           MASK     EXTVBACT                              #  SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
022159,000331: 23,2661           00006                           EXTEND                                         
022160,000332: 23,2662           15423                           BZF      ENDEXT                                #  YES, TERMINATE VB 82 LOOP
022161,000333: 23,2663           34734                           CAF      1SEC                                  
022162,000334: 23,2664           04555                           TC       BANKCALL                              #  WAIT ONE SECOND BEFORE REPEATING
022163,000335: 23,2665           01730                           CADR     DELAYJOB                              #    ORBITAL PARAMETER COMPUTATION.
022164,000336: 23,2666           02604                           TC       V82GON1                               
022165,000337: 

Page 510

022167,000339:                                                                                                  #  SUBROUTINE NAME:     SR30.1
022168,000340:                                                                                                  #  MOD NO:  0                                                              DATE:           16 FEB 67
022169,000341:                                                                                                  #  MOD BY:  RR BAIRNSFATHER                                                LOG SECTION:    R32
022170,000342:                                                                                                  #  MOD NO:  1           MOD BY:  RR BAIRNSFATHER      DATE: 11 APR 67      SR30.1 CHANGED TO ALLOW MONITOR OPERN
022171,000343:                                                                                                  #  MOD NO:  2           MOD BY:  RR BAIRNSFATHER      DATE:  14 APR 67     ADD OVFL CK FOR RAPO
022172,000344:                                                                                                  #  MOD NO:  3           MOD BY ALONSO                 DATE: 11 DEC 67      SUBROUTINE REWRITTEN
022173,000345:                                                                                                  #  MOD NO: 4            MOD BY ALONSO                 DATE: 26 MAR 68      PROG MOD TO HANDLE DIF EARTH/MOON SCALE
022174,000346:                                                                                                  #  MOD NO:  5           MOD BY:  RR BAIRNSFATHER      DATE:  6 AUG 68      OVFL CK FOR HAPO & HPER.VOIDS MOD #2.
022175,000347: 
022176,000348: 
022177,000349:                                                                                                  #  NEW FUNCTIONAL DESCRIPTION:     ORBITAL PARAMETERS DISPLAY FOR NOUNS 32  AND 44.
022178,000350:                                                                                                  #  SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
022179,000351:                                                                                                  #  RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
022180,000352:                                                                                                  #  LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
022181,000353:                                                                                                  #  TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
022182,000354:                                                                                                  #  IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
022183,000355:                                                                                                  #  NEGATIVE    IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
022184,000356:                                                                                                  #  CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
022185,000357:                                                                                                  #  WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
022186,000358: 
022187,000359:                                                                                                  #  ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
022188,000360:                                                                                                  #            ABOVE REMARKS.
022189,000361: 
022190,000362:                                                                                                  #  CALLING SEQUENCE:         CALL
022191,000363:                                                                                                  #                                  SR30.1
022192,000364:                                                                                                  #  SUBROUTINES CALLED:       TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
022193,000365:                                                                                                  #  NORMAL EXIT MODE:         CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
022194,000366:                                                                                                  #  ALARMS:                   NONE
022195,000367:                                                                                                  #  OUTPUT:  RAPO   (-29) M EARTH   APOGEE RADIUS   EARTH CENTERED COORD.
022196,000368:                                                                                                  #                  (-27) M MOON                    MOON CENTERED COORD.
022197,000369:                                                                                                  #           RPER   (-29) M EARTH   PERIGEE RADIUS  EARTH CENTERED COORD.
022198,000370:                                                                                                  #                  (-27) M MOON                    MOON CENTERED COORD.
022199,000371:                                                                                                  #           HAPOX  (-29) M         APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022200,000372:                                                                                                  #           HPERX  (-29) M         PERIGEE ALT. ABOVE PAD OR LAND. SITE    MAX VALUE LIMITED TO 9999.9 NM.
022201,000373:                                                                                                  #           TFF    (-28) CS        TIME TO 300KFT OR 35KFT ALTITUDE
022202,000374:                                                                                                  #           -TPER  (-28) CS        TIME TO PERIGEE
022203,000375:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED-
022204,000376:                                                                                                  #           TFF/RTMU (+17) EARTH   RECIPROCAL OF PROPER GRAV CONSTANT FOR
022205,000377:                                                                                                  #                    (+14) MOON    EARTH OR MOON = 1/SQRT(MU).
022206,000378:                                                                                                  #           RONE    (-29) M        STATE VECTOR
022207,000379:                                                                                                  #           VONE    (-7)  M/CS     STATE VECTOR
022208,000380:                                                                                                  #           RPADTEM (-29) M EARTH  RADIUS OF LAUNCH PAD OR LUNAR LANDING
022209,000381:                                                                                                  #                   (-27) M MOON   SITE.
022210,000382:                                                                                                  #           HPERMIN (-29) M EARTH  (300 OR 35)KFT MINIMUM PERIGEE ALTITUDE
022211,000383:                                                                                                  #                   (-27) M MOON   ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
022212,000384:                                                                                                  #           V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
022213,000385: 
022214,000386:                                                                                                  #  DEBRIS:  QPRET, PDL, S2
022215,000387: 

Page 511

022217,000389: 23,2667                                           COUNT*   $$/SR30S                              
022218,000390: 
022219,000391: 23,2667           44001        SR30.1             SETPD    STQ                                   #  INITIALIZE PUSHDOWN LIST.
022220,000392: 23,2670           00001                                    0                                     
022221,000393: 23,2671           00051                                    S2                                    
022222,000394:                                                                                                  #                                          SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
022223,000395:                                                                                                  #                                                        VONE AT (-7)M/CS
022224,000396:                                                                                                  #                                           TFFCONMU,TFFRP/RA,CALCTPER AND CALCTFF
022225,000397:                                                                                                  #                                           CALLS REQUIRE :
022226,000398:                                                                                                  #                                           EARTH CENTERED (NO RESCALING REQUIRED)
022227,000399:                                                                                                  #                                                         RONE SCALED TO B-29 M
022228,000400:                                                                                                  #                                                         VONE SCALED TO B-7 M/CS
022229,000401:                                                                                                  #                                           MOON CENTERED  (RESCALING REQUIRED)
022230,000402:                                                                                                  #                                                         RONE SCALED TO B-27 M
022231,000403:                                                                                                  #                                                         VONE SCALED TO B-5  M/CS
022232,000404: 23,2672           77214                           BOFF     VLOAD                                 
022233,000405: 23,2673           04742                                    V82EMFLG                              #    OFF FOR EARTH ,  ON FOR MOON.
022234,000406: 23,2674           46703                                    TFFCALLS                              
022235,000407: 23,2675           02327                                    RONE                                  
022236,000408: 23,2676           77752                           VSL2                                           
022237,000409: 23,2677           26327                           STOVL    RONE                                  
022238,000410: 23,2700           02335                                    VONE                                  
022239,000411: 23,2701           77752                           VSL2                                           
022240,000412: 23,2702           02335                           STORE    VONE                                  
022241,000413: 23,2703           77624        TFFCALLS           CALL                                           
022242,000414: 23,2704           56722                                    TFFCONMU                              
022243,000415: 23,2705           77624                           CALL                                           #  TFFRP/RA COMPUTES RAPO,RPER.
022244,000416: 23,2706           56770                                    TFFRP/RA                              
022245,000417:                                                                                                  #                                          RETURNS WITH RAPO IN D(MPAC).
022246,000418: 23,2707           77625                           DSU                                            
022247,000419: 23,2710           02323                                    RPADTEM                               
022248,000420: 23,2711           64414                           BOFF     SR2R                                  #  NEED HAPO AT (-29)M FOR DISPLAY.
022249,000421:                                                                                                  #                                          IF MOON CENTERED, RESCALE FROM (-27)M.
022250,000422:                                                                                                  #                                           IF EARTH CENTERED ALREADY AT (-29)M.
022251,000423: 23,2712           04742                                    V82EMFLG                              #   OFF FOR EARTH , ON FOR MOON.
022252,000424: 23,2713           46714                                    +1                                    
022253,000425: 23,2714           77624                           CALL                                           #  IF HAPO > MAXNM, SET HAPO =9999.9 NM.
022254,000426: 23,2715           46754                                    MAXCHK                                #  OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
022255,000427: 23,2716           16352        STORHAPO           STODL    HAPOX                                 
022256,000428: 23,2717           00017                                    RPER                                  
022257,000429: 23,2720           77625                           DSU                                            
022258,000430: 23,2721           02323                                    RPADTEM                               #  GIVES HPER AT (-29)M EARTH, (-27)M MOON.
022259,000431: 23,2722           00161                           STORE    MPAC       +4                         #  SAVE THIS FOR COMPARISON TO HPERMIN.
022260,000432: 23,2723           64414                           BOFF     SR2R                                  #  NEED HPER AT (-29)M FOR DISPLAY.
022261,000433:                                                                                                  #                                          IF MOON CENTERED, RESCALE FROM (-27)M.
022262,000434:                                                                                                  #                                          IF EARTH CENTERED ALREADY AT (-29)M.
022263,000435: 23,2724           04742                                    V82EMFLG                              #  OFF FOR EARTH,  ON FOR MOON.
022264,000436: 23,2725           46726                                    +1                                    
022265,000437: 23,2726           77624                           CALL                                           #  IF HPER > MAXNM, SET HPER = 9999.9 NM.
022266,000438: 23,2727           46754                                    MAXCHK                                

Page 512

022268,000440: 23,2730           16354        STORHPER           STODL    HPERX                                 #  STORE (RPER - RPADTEM) INTO HPERX.
022269,000441: 23,2731           00161                                    MPAC       +4                         
022270,000442: 23,2732           51025                           DSU      BPL                                   #  HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022271,000443: 23,2733           02321                                    HPERMIN                               #  IF HPER L/   HPERMIN (300 OR 35)KFT,
022272,000444: 23,2734           46740                                    DOTPER                                #   THEN ZERO INTO -TPER.
022273,000445: 23,2735           52145                           DLOAD    GOTO                                  #    OTHERWISE CALCULATE TPER.
022274,000446: 23,2736           15332                                    HI6ZEROS                              
022275,000447: 23,2737           46744                                    SKIPTPER                              
022276,000448: 23,2740           45145        DOTPER             DLOAD    CALL                                  
022277,000449: 23,2741           00017                                    RPER                                  
022278,000450: 23,2742           57026                                    CALCTPER                              
022279,000451: 23,2743           77676                           DCOMP                                          #  TPER IS PUT NEG INTO -TPER.
022280,000452: 23,2744           16346        SKIPTPER           STODL    -TPER                                 
022281,000453: 23,2745           02321                                    HPERMIN                               #  HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022282,000454: 23,2746           45015                           DAD      CALL                                  
022283,000455: 23,2747           02323                                    RPADTEM                               #  RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
022284,000456: 23,2750           57031                                    CALCTFF                               #  GIVES 59M59S FOR TFF IF RPER G/
022285,000457: 23,2751           77676                           DCOMP                                          #    HPERMIN + RPADTEM. (TPER WAS NON ZERO)
022286,000458: 23,2752           36344                           STCALL   TFF                                   #  OTHERWISE COMPUTES TFF.       (GOTO)
022287,000459: 23,2753           00051                                    S2                                    
022288,000460: 
022289,000461: 23,2754           51025        MAXCHK             DSU      BPL                                   #  IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
022290,000462: 23,2755           06764                                    MAXNM                                 
022291,000463: 23,2756           46761                                    +3                                    #  OTHERWISE C(MPAC) = B(MPAC).
022292,000464: 23,2757           43415                           DAD      RVQ                                   
022293,000465: 23,2760           06764                                    MAXNM                                 
022294,000466: 23,2761           43545                 +3        DLOAD    RVQ                                   #  (USED BY P30 - P37 ALSO)
022295,000467: 23,2762           06764                                    MAXNM                                 
022296,000468: 
022297,000469: 23,2763           01065 05603  MAXNM              2OCT     01065      05603                      
022298,000470: 

Page 513 This page is empty.


End of include-file R30.agc.  Parent file is MAIN.agc