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.

012153,000002:                                                                                                  ## Copyright:   Public domain.
012154,000003:                                                                                                  ## Filename:    CSM_GEOMETRY.agc
012155,000004:                                                                                                  ## Purpose:     Part of the source code for Colossus build 237.  
012156,000005:                                                                                                  ##              This is for the Command Module's (CM) Apollo Guidance
012157,000006:                                                                                                  ##              Computer (AGC), for Apollo 8.
012158,000007:                                                                                                  ## Assembler:   yaYUL
012159,000008:                                                                                                  ## Contact:     Onno Hommes <ohommes@alumni.cmu.edu>
012160,000009:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
012161,000010:                                                                                                  ## Page Scans:  www.ibiblio.org/apollo/ScansForConversion/Colossus237/
012162,000011:                                                                                                  ## Mod history: 2010-05-30 OH   Adapted from corresponding Colossus 249 file.
012163,000012:                                                                                                  ##              2010-12-04 JL   Remove Colossus 249 header comments. Change to double-hash page numbers.
012164,000013:                                                                                                  ##              2010-01-16 JL   Minor fixes.
012165,000014:                                                                                                  ##              2016-12-30 RSB  Proofed comment text using octopus/ProoferComments,
012166,000015:                                                                                                  ##                              and corrected errors found.
012167,000016:                                                                                                  ##              2017-01-28 RSB  WTIH -> WITH.
012168,000017: 

Page 278

012170,000019: 22,2000                                           BANK     22                                    
012171,000020: 23,2000                                           SETLOC   COMGEOM1                              
012172,000021: 23,2000                                           BANK                                           
012173,000022: 
012174,000023:                                                                                                  #  THIS ROUTINE TAKES THE SHAFT AND TRUNNION ANGLES AS READ BY THE CM OPTICAL SYSTEM AND CONVERTS THEM INTO A  UNIT
012175,000024:                                                                                                  #  VECTOR REFERENCED TO THE NAVIGATION BASE COORDINATE SYSTEM AND COINCIDENT WITH THE SEXTANT LINE OF SIGHT.
012176,000025: 
012177,000026:                                                                                                  #  THE INPUTS ARE  1) THE SEXTANT SHAFT AND TRUNNION ANGLES ARE STORED SP IN LOCATIONS 3 AND 5 RESPECTIVELY OF THE
012178,000027:                                                                                                  #  MARK VAC AREA.  2) THE COMPLEMENT OF THE BASE ADDRESS OF THE MARK VAC AREA IS STORED SP AT LOCATION X1 OF YOUR
012179,000028:                                                                                                  #  JOB VAC AREA.
012180,000029: 
012181,000030:                                                                                                  #  THE OUTPUT IS A HALF-UNIT VECTOR IN NAVIGATION BASE COORDINATES AND STORED AT LOCATION 32D OF THE VAC AREA. THE
012182,000031:                                                                                                  #  OUTPUT IS ALSO AVAILABLE AT MPAC.
012183,000032: 
012184,000033: 
012185,000034: 23,2000                                           COUNT    23/GEOM                               
012186,000035: 
012187,000036: 23,2000           47133        SXTNB              SLOAD*   RTB                                   #  PUSHDOWN  00,02,04,(17D-19D),32D-36D
012188,000037: 23,2001           00006                                    5,1                                   #  TRUNNION = TA
012189,000038: 23,2002           45510                                    CDULOGIC                              
012190,000039: 23,2003           41434                           RTB      PUSH                                  
012191,000040: 23,2004           46027                                    SXTLOGIC                              
012192,000041: 23,2005           72556                           SIN      SL1                                   
012193,000042: 23,2006           66606                           PUSH     SLOAD*                                #  PD2 = SIN(TA)
012194,000043: 23,2007           00004                                    3,1                                   #  SHAFT = SA
012195,000044: 23,2010           41434                           RTB      PUSH                                  #  PD4 = SA
012196,000045: 23,2011           45510                                    CDULOGIC                              
012197,000046: 
012198,000047: 23,2012           41346                           COS      DMP                                   
012199,000048: 23,2013           00003                                    2                                     
012200,000049: 23,2014           14041                           STODL    STARM                                 #  COS(SA)SIN(TA)
012201,000050: 
012202,000051: 23,2015           41356                           SIN      DMP                                   
012203,000052: 23,2016           77626                           STADR                                          
012204,000053: 23,2017           63734                           STODL    STARM      +2                         #  SIN(SA)SIN(TA)
012205,000054: 
012206,000055: 23,2020           77746                           COS                                            
012207,000056: 23,2021           24045                           STOVL    STARM      +4                         
012208,000057: 23,2022           00041                                    STARM                                 #  STARM = 32D
012209,000058: 23,2023           76521                           MXV      VSL1                                  
012210,000059: 23,2024           06302                                    NB1NB2                                
012211,000060: 23,2025           00041                           STORE    32D                                   
012212,000061: 23,2026           77616                           RVQ                                            
012213,000062: 
012214,000063: 
012215,000064: 23,2027           32323        SXTLOGIC           CAF      10DEGS-                               #  CORRECT FOR 19.775 DEGREE OFFSET
012216,000065: 23,2030           26154                           ADS      MPAC                                  
012217,000066: 23,2031           34676                           CAF      QUARTER                               
012218,000067: 23,2032           07256                           TC       SHORTMP                               
012219,000068: 23,2033           06030                           TC       DANZIG                                
012220,000069: 

Page 279

012222,000071: 
012223,000072:                                                                                                  #  CALCSXA COMPUTES THE SEXTANT SHAFT AND TRUNNION ANGLES REQUIRED TO POSITION THE OPTICS SUCH THAT A STAR LINE-
012224,000073:                                                                                                  #  OF-SIGHT LIES ALONG THE STAR VECTOR. THE ROUTINE TAKES THE GIVEN STAR VECTOR AND EXPRESSES IT AS A VECTOR REF-
012225,000074:                                                                                                  #  ERENCED TO THE OPTICS COORDINATE SYSTEM. IN ADDITION IT SETS UP THREE UNIT VECTORS DEFINING THE X, Y, AND Z AXES
012226,000075:                                                                                                  #  REFERENCED TO THE OPTICS COORDINATE SYSTEM.
012227,000076: 
012228,000077:                                                                                                  #  THE INPUTS ARE  1) THE STAR VECTOR REFERRED TO PRESENT STABLE MEMBER COORDINATES STORED AT STAR.   2) SAME ANGLE
012229,000078:                                                                                                  #  INPUT AS *SMNB*, I.E. SINES AND COSINES OF THE CDU ANGLES, IN THE ORDER Y Z X, AT SINCDU AND COSCDU.   A CALL
012230,000079:                                                                                                  #  TO CDUTRIG WILL PROVIDE THIS INPUT.
012231,000080: 
012232,000081:                                                                                                  #  THE OUTPUTS ARE THE SEXTANT SHAFT AND TRUNNION ANGLES STORED DP AT SAC AND PAC RESPECTIVELY.  (LOW ORDER PART
012233,000082:                                                                                                  #  EQUAL TO ZERO).
012234,000083: 
012235,000084: 
012236,000085: 23,2034           77220        CALCSXA            ITA      VLOAD                                 #  PUSHDOWN  00-26D,28D,30D,32D-36D
012237,000086: 23,2035           00034                                    28D                                   
012238,000087: 23,2036           02766                                    STAR                                  
012239,000088: 23,2037           77624                           CALL                                           
012240,000089: 23,2040           47577                                    *SMNB*                                
012241,000090: 23,2041           76521                           MXV      VSL1                                  
012242,000091: 23,2042           06260                                    NB2NB1                                
012243,000092: 23,2043           26766                           STOVL    STAR                                  
012244,000093: 23,2044           15330                                    HIUNITX                               
012245,000094: 23,2045           26555                           STOVL    XNB1                                  
012246,000095: 23,2046           15326                                    HIUNITY                               
012247,000096: 23,2047           26563                           STOVL    YNB1                                  
012248,000097: 23,2050           15324                                    HIUNITZ                               
012249,000098: 23,2051           36571                           STCALL   ZNB1                                  
012250,000099: 23,2052           46076                                    SXTANG1                               
012251,000100: 

Page 280

012253,000102: 
012254,000103:                                                                                                  #  SXTANG COMPUTES THE SEXTANT SHAFT AND TRUNNION ANGLES REQUIRED TO POSITION THE OPTICS SUCH THAT A STAR LINE-OF-
012255,000104:                                                                                                  #  SIGHT LIES ALONG THE STAR VECTOR.
012256,000105: 
012257,000106:                                                                                                  #  THE INPUTS ARE  1) THE STAR VECTOR REFERRED TO ANY COORDINATE SYSTEM STORED AT STAR.  2) THE NAVIGATION BASE
012258,000107:                                                                                                  #  COORDINATES REFERRED TO THE SAME COORDINATE SYSTEM. THESE THREE HALF-UNIT VECTORS ARE STORED AT XNB, YNB, AND
012259,000108:                                                                                                  #  ZNB.
012260,000109: 
012261,000110:                                                                                                  #  THE OUTPUTS ARE THE SEXTANT SHAFT AND TRUNNION ANGLES STORED DP AT SAC AND PAC RESPECTIVELY.  (LOW ORDER PART
012262,000111:                                                                                                  #  EQUAL TO ZERO).
012263,000112: 
012264,000113: 
012265,000114: 23,2053           47020        SXTANG             ITA      RTB                                   #  PUSHDOWN 16D,18D,22D-26D,28D
012266,000115: 23,2054           00034                                    28D                                   
012267,000116: 23,2055           45657                                    TRANSP1                               #  EREF WRT NB2
012268,000117: 23,2056           64375                           VLOAD    MXV                                   
012269,000118: 23,2057           02714                                    XNB                                   
012270,000119: 23,2060           06260                                    NB2NB1                                
012271,000120: 23,2061           77772                           VSL1                                           
012272,000121: 23,2062           26555                           STOVL    XNB1                                  
012273,000122: 23,2063           02722                                    YNB                                   
012274,000123: 23,2064           76521                           MXV      VSL1                                  
012275,000124: 23,2065           06260                                    NB2NB1                                
012276,000125: 23,2066           26563                           STOVL    YNB1                                  
012277,000126: 23,2067           02730                                    ZNB                                   
012278,000127: 23,2070           76521                           MXV      VSL1                                  
012279,000128: 23,2071           06260                                    NB2NB1                                
012280,000129: 23,2072           02571                           STORE    ZNB1                                  
012281,000130: 
012282,000131: 23,2073           47034                           RTB      RTB                                   
012283,000132: 23,2074           45657                                    TRANSP1                               
012284,000133: 23,2075           45673                                    TRANSP2                               
012285,000134: 
012286,000135: 23,2076           47375        SXTANG1            VLOAD    VXV                                   
012287,000136: 23,2077           02571                                    ZNB1                                  
012288,000137: 23,2100           02766                                    STAR                                  
012289,000138: 23,2101           77600                           BOV                                            
012290,000139: 23,2102           46103                                    +1                                    
012291,000140: 23,2103           40056                           UNIT     BOV                                   
012292,000141: 23,2104           46145                                    ZNB=S1                                
012293,000142: 23,2105           00027                           STORE    PDA                                   #  PDA = UNIT(ZNB X S)
012294,000143: 
012295,000144: 23,2106           57441                           DOT      DCOMP                                 
012296,000145: 23,2107           02555                                    XNB1                                  
012297,000146: 23,2110           24023                           STOVL    SINTH                                 #  SIN(SA) = PDA . -XNB
012298,000147: 23,2111           00027                                    PDA                                   
012299,000148: 
012300,000149: 23,2112           77641                           DOT                                            
012301,000150: 23,2113           02563                                    YNB1                                  
012302,000151: 23,2114           34021                           STCALL   COSTH                                 #  COS(SA) = PDA . YNB
012303,000152: 23,2115           47211                                    ARCTRIG                               

Page 281

012305,000154: 23,2116           77634                           RTB                                            
012306,000155: 23,2117           45543                                    1STO2S                                
012307,000156: 23,2120           26774                           STOVL    SAC                                   
012308,000157: 23,2121           02766                                    STAR                                  
012309,000158: 23,2122           77600                           BOV                                            
012310,000159: 23,2123           46124                                    +1                                    
012311,000160: 23,2124           72441                           DOT      SL1                                   
012312,000161: 23,2125           02571                                    ZNB1                                  
012313,000162: 23,2126           77726                           ACOS                                           
012314,000163: 23,2127           62440                           BMN      SL2                                   
012315,000164: 23,2130           46142                                    SXTALARM                              #  TRUNNION ANGLE NEGATIVE
012316,000165: 23,2131           45200                           BOV      DSU                                   
012317,000166: 23,2132           46142                                    SXTALARM                              #  TRUNNION ANGLE GREATER THAN 90 DEGREES
012318,000167: 23,2133           06331                                    20DEG-                                
012319,000168: 23,2134           77634                           RTB                                            
012320,000169: 23,2135           45543                                    1STO2S                                
012321,000170: 23,2136           02776                           STORE    PAC                                   #  FOR FLIGHT USE, CULTFLAG IS ON IF
012322,000171: 23,2137           77614                           CLRGO                                          #  TRUNION IS GREATER THAN 90 DEG
012323,000172: 23,2140           01630                                    CULTFLAG                              
012324,000173: 23,2141           00034                                    28D                                   
012325,000174: 23,2142           77614        SXTALARM           SETGO                                          #  ALARM HAS BEEN REMOVED FROM THIS
012326,000175: 23,2143           01430                                    CULTFLAG                              
012327,000176: 23,2144           00034                                    28D                                   #  SUBROUTINE,ALARM WILL BE SET BY MPI
012328,000177: 23,2145           77745        ZNB=S1             DLOAD                                          
012329,000178: 23,2146           06325                                    270DEG                                
012330,000179: 23,2147           16774                           STODL    SAC                                   
012331,000180: 23,2150           06327                                    20DEGS-                               
012332,000181: 23,2151           02776                           STORE    PAC                                   
012333,000182: 23,2152           77614                           CLRGO                                          
012334,000183: 23,2153           01630                                    CULTFLAG                              
012335,000184: 23,2154           00034                                    28D                                   
012336,000185: 

Page 282

012338,000187: 
012339,000188:                                                                                                  #  THESE TWO ROUTINES COMPUTE THE ACTUAL STATE VECTOR FOR LM, CSM BY ADDING
012340,000189:                                                                                                  #  THE CONIC R,V AND THE DEVIATIONSR,V. THE STATE VECTORS ARE CONVERTED TO
012341,000190:                                                                                                  #  METERS B-29 AND METERS/CSEC B-7 AND STORED APPROPRIATELY IN RN,VN OR
012342,000191:                                                                                                  #  R-OTHER , V-OTHER FOR DOWNLINK. THE ROUTINES NAMES ARE SWITCHED IN THE
012343,000192:                                                                                                  #  OTHER VEHICLES COMPUTER.
012344,000193: 
012345,000194:                                                                                                  #  INPUT
012346,000195:                                                                                                  #    STATE VECTOR IN TEMPORARY STORAGE AREA
012347,000196:                                                                                                  #    IF STATE VECTOR IS SCALED POS B27 AND VEL B5
012348,000197:                                                                                                  #       SET X2 TO +2
012349,000198:                                                                                                  #    IF STATE VECTOR IS SCALED POS B29 AND VEL B7
012350,000199:                                                                                                  #       SET X2 TO 0
012351,000200: 
012352,000201:                                                                                                  #  OUTPUT
012353,000202:                                                                                                  #    R(T) IN RN, V(T) IN VN, T IN PIPTIME
012354,000203:                                                                                                  #  OR
012355,000204:                                                                                                  #    R(T) IN R-OTHER, V(T) IN V-OTHER   (T IS DEFINED BY T-OTHER)
012356,000205: 
012357,000206: 
012358,000207: 23,2155                                           BANK     23                                    
012359,000208: 10,2000                                           SETLOC   COMGEOM2                              
012360,000209: 10,2000                                           BANK                                           
012361,000210: 10,2237                                           COUNT    10/GEOM                               
012362,000211: 10,2237           43414        SVDWN1             BOF      RVQ                                   #  SW=1=AVETOMID DOING W-MATRIX INTEG
012363,000212: 10,2240           04756                                    AVEMIDSW                              
012364,000213: 10,2241           20242                                    +1                                    
012365,000214: 10,2242           53775                           VLOAD    VSL*                                  
012366,000215: 10,2243           01521                                    TDELTAV                               
012367,000216: 10,2244           57605                                    0          -7,2                       
012368,000217: 10,2245           53655                           VAD      VSL*                                  
012369,000218: 10,2246           01535                                    RCV                                   
012370,000219: 10,2247           57576                                    0,2                                   
012371,000220: 10,2250           25171                           STOVL    RN                                    
012372,000221: 10,2251           01527                                    TNUV                                  
012373,000222: 10,2252           53257                           VSL*     VAD                                   
012374,000223: 10,2253           57602                                    0          -4,2                       
012375,000224: 10,2254           01543                                    VCV                                   
012376,000225: 10,2255           77657                           VSL*                                           
012377,000226: 10,2256           57576                                    0,2                                   
012378,000227: 10,2257           15177                           STODL    VN                                    
012379,000228: 10,2260           01517                                    TET                                   
012380,000229: 10,2261           01205                           STORE    PIPTIME                               
012381,000230: 10,2262           77616                           RVQ                                            
012382,000231: 
012383,000232: 
012384,000233: 10,2263           53775        SVDWN2             VLOAD    VSL*                                  
012385,000234: 10,2264           01521                                    TDELTAV                               
012386,000235: 10,2265           57605                                    0          -7,2                       
012387,000236: 10,2266           53655                           VAD      VSL*                                  
012388,000237: 10,2267           01535                                    RCV                                   

Page 283

012390,000239: 10,2270           57576                                    0,2                                   
012391,000240: 10,2271           25722                           STOVL    R-OTHER                               
012392,000241: 10,2272           01527                                    TNUV                                  
012393,000242: 10,2273           53257                           VSL*     VAD                                   
012394,000243: 10,2274           57602                                    0          -4,2                       
012395,000244: 10,2275           01543                                    VCV                                   
012396,000245: 10,2276           77657                           VSL*                                           
012397,000246: 10,2277           57576                                    0,2                                   
012398,000247: 10,2300           01730                           STORE    V-OTHER                               
012399,000248: 10,2301           77616                           RVQ                                            
012400,000249: 

Page 284

012402,000251: 
012403,000252:                                                                                                  #  SUBROUTINE TO COMPUTE THE NATURAL LOG OF C(MPAC, MPAC +1).
012404,000253: 
012405,000254:                                                                                                  #           ENTRY:      CALL
012406,000255:                                                                                                  #                              LOG
012407,000256: 
012408,000257:                                                                                                  #  SUBROUTINE RETURNS WITH  -LOG  IN DP MPAC.
012409,000258: 
012410,000259:                                                                                                  #  EBANK IS ARBITRARY..
012411,000260: 
012412,000261: 
012413,000262: 14,2000                                           BANK     14                                    
012414,000263: 23,2000                                           SETLOC   POWFLIT2                              
012415,000264: 23,2000                                           BANK                                           
012416,000265: 23,2155                                           COUNT    23/GEOM                               
012417,000266: 
012418,000267: 23,2155           44301        LOG                NORM     BDSU                                  #  GENERATES LOG BY SHIFTING ARG
012419,000268: 23,2156           00160                                    MPAC       +3                         #  UNTIL IT LIES BETWEEN .5 AND 1.
012420,000269: 23,2157           06212                                    NEARLY1                               #  THE LOG OF THIS PART IS FOUND AND THE
012421,000270: 23,2160           77776                           EXIT                                           #  LOG OF THE SHIFTED PART IS COMPUTED
012422,000271: 23,2161           07171                           TC       POLY                                  #  AND ADDED IN. SHIFT COUNT STORED
012423,000272: 
012424,000273: 23,2162           00002                           DEC      2          B-14                       #  (N-1, SUPPLIED BY SMERZH)
012425,000274: 23,2163           00000 00000                     2DEC     0          B-28                       #  IN MPAC +3.
012426,000275: 23,2165           01001 14636                     2DEC     .031335467                            
012427,000276: 23,2167           00325 07310                     2DEC     .0130145859                            
012428,000277: 23,2171           00541 16735                     2DEC     .0215738898                            
012429,000278: 
012430,000279: 23,2173           34714                           CAF      ZERO                                  
012431,000280: 23,2174           54156                           TS       MPAC       +2                         
012432,000281: 23,2175           00006                           EXTEND                                         
012433,000282: 23,2176           32214                           DCA      CLOG2/32                              
012434,000283: 23,2177           52155                           DXCH     MPAC                                  
012435,000284: 23,2200           52160                           DXCH     MPAC       +3                         
012436,000285: 23,2201           40000                           COM                                            #  LOAD POSITIVE SHIFT COUNT IN A.
012437,000286: 23,2202           07256                           TC       SHORTMP                               #  MULTIPLY BY SHIFT COUNT.
012438,000287: 
012439,000288: 23,2203           52156                           DXCH     MPAC       +1                         
012440,000289: 23,2204           52155                           DXCH     MPAC                                  
012441,000290: 23,2205           52160                           DXCH     MPAC       +3                         
012442,000291: 23,2206           20155                           DAS      MPAC                                  
012443,000292: 23,2207           06006                           TC       INTPRET                               #  RESULT IN MPAC, MPAC +1
012444,000293: 
012445,000294: 23,2210           77616                           RVQ                                            
012446,000295: 
012447,000296: 23,2211           37777 37777  NEARLY1            2DEC     .999999999                            
012448,000297: 

Page 285

012450,000299: 23,2213           00542 34414  CLOG2/32           2DEC     .0216608494                            
012451,000300: 

Page 286

012453,000302: 
012454,000303:                                                                                                  #  SUBROUTINE NAME:       EARTH ROTATOR     (EARROT1 OR EARROT2)           DATE:           15 FEB 67
012455,000304:                                                                                                  #  MOD NO:  N +1                                                           LOG SECTION:    POWERED FLIGHT SUBROS
012456,000305:                                                                                                  #  MOD BY:  ENTRY GROUP  (BAIRNSFATHER)
012457,000306:                                                                                                  #  FUNCTIONAL DESCRIPTION:      THIS ROUTINE PROJECTS THE INITIAL EARTH TARGET VECTOR   RTINIT   AHEAD THROUGH
012458,000307:                                                                                                  #           THE ESTIMATED TIME OF FLIGHT. INITIAL CALL RESOLVES THE INITIAL TARGET VECTOR   RTINIT   INTO EASTERLY
012459,000308:                                                                                                  #           AND NORMAL COMPONENTS   RTEAST   AND   RTNORM   . INITIAL AND  SUBSEQUENT CALLS ROTATE THIS VECTOR
012460,000309:                                                                                                  #           ABOUT THE (FULL) UNIT POLAR AXIS   UNITW   THROUGH THE ANGLE    WIE DTEAROT   TO OBTAIN THE ROTATED
012461,000310:                                                                                                  #           TARGET VECTOR   RT   . ALL VECTORS EXCEPT   UNITW   ARE HALF UNIT.
012462,000311:                                                                                                  #           THE EQUATIONS ARE
012463,000312:                                                                                                  #                  -    -        -                     -
012464,000313:                                                                                                  #                  RT = RTINIT + RTNORM (COS(WT) -1) + RTEAST SIN(WT)
012465,000314:                                                                                                  #           WHERE  WT = WIE DTEAROT
012466,000315:                                                                                                  #                  RTINIT = INITIAL TARGET VECTOR
012467,000316:                                                                                                  #                  -        -     -
012468,000317:                                                                                                  #                  RTEAST = UNITW*RTINIT
012469,000318:                                                                                                  #                  -        -      -
012470,000319:                                                                                                  #                  RTNORM = RTEAST*UNITW
012471,000320: 
012472,000321:                                                                                                  #           FOR CONTINUOUS UPDATING, ONLY ONE ENTRY TO EARROT1 IS REQUIRED, WITH SUBSEQUENT ENTRIES AT EARROT2.
012473,000322:                                                                                                  #  CALLING SEQUENCE:  FIRST CALL                    SUBSEQUENT CALL
012474,000323:                                                                                                  #                     STCALL DTEAROT                STCALL DTEAROT
012475,000324:                                                                                                  #                            EARROT1                       EARROT2
012476,000325:                                                                                                  #                     C(MPAC) UNSPECIFIED           C(MPAC) = DTEAROT
012477,000326:                                                                                                  #           PUSHLOC = PDL+0, ARBITRARY. 6 LOCATIONS USED.
012478,000327: 
012479,000328:                                                                                                  #  SUBROUTINES USED:  NONE
012480,000329:                                                                                                  #  NORMAL EXIT MODES:   RVQ
012481,000330:                                                                                                  #  ALARMS:  NONE
012482,000331:                                                                                                  #  OUTPUT:  RTEAST (-1)            .5 UNIT VECTOR EAST, COMPNT OF RTINIT   LEFT BY FIRST CALL
012483,000332:                                                                                                  #           RTNORM (-1)            .5 UNIT VECTOR NORML, COMPNT OF RTINIT  LEFT BY FIRST CALL
012484,000333:                                                                                                  #           RT     (-1)            .5 UNIT TARGET VECTOR, ROTATED          LEFT BY ALL CALLS
012485,000334:                                                                                                  #           DTEAROT  (-28) CS      MAY BE CHANGED BY EARROT2, IF OVER 1 DAY
012486,000335:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED:
012487,000336:                                                                                                  #           UNITW  (0)             UNIT POLAR VECTOR                       PAD LOADED
012488,000337:                                                                                                  #           RTINIT (-1)            .5 UNIT INITIAL TARGET VECTOR           LEFT BY ENTRY
012489,000338:                                                                                                  #           DTEAROT  (-28) CS      TIME OF FLIGHT                          LEFT BY CALLER
012490,000339:                                                                                                  #  DEBRIS:  QPRET,     PDL+0 ... PDL+5
012491,000340: 

Page 287

012493,000342: 
012494,000343: 23,2215  E7,1451                                  EBANK=   RTINIT                                
012495,000344: 
012496,000345: 23,2215           47375        EARROT1            VLOAD    VXV                                   
012497,000346: 23,2216           01714                                    UNITW                                 #  FULL UNIT VECTOR
012498,000347: 23,2217           03452                                    RTINIT                                #  .5 UNIT
012499,000348: 23,2220           03460                           STORE    RTEAST                                #  .5 UNIT
012500,000349: 
012501,000350: 23,2221           77635                           VXV                                            
012502,000351: 23,2222           01714                                    UNITW                                 #  FULL UNIT
012503,000352: 23,2223           17466                           STODL    RTNORM                                #  .5 UNIT
012504,000353: 23,2224           03606                                    DTEAROT                               #  (-28) CS
012505,000354: 
012506,000355: 23,2225           56204        EARROT2            BOVB     DDV                                   
012507,000356: 23,2226           57314                                    TCDANZIG                              #  RESET OVFIND, IF ON
012508,000357: 23,2227           06256                                    1/WIE                                 
012509,000358: 23,2230           41400                           BOV      PUSH                                  
012510,000359: 23,2231           46245                                    OVERADAY                              
012511,000360: 23,2232           45346                           COS      DSU                                   
012512,000361: 23,2233           15330                                    HIDPHALF                              
012513,000362: 23,2234           65361                           VXSC     PDDL                                  #  XCH W PUSH LIST
012514,000363: 23,2235           03466                                    RTNORM                                #  .5 UNIT
012515,000364: 23,2236           74356                           SIN      VXSC                                  
012516,000365: 23,2237           03460                                    RTEAST                                #  .5 UNIT
012517,000366: 23,2240           76455                           VAD      VSL1                                  
012518,000367: 23,2241           53455                           VAD      UNIT                                  #  INSURE THAT RT IS 'UNIT'.
012519,000368: 23,2242           03452                                    RTINIT                                #  .5 UNIT
012520,000369: 23,2243           03474                           STORE    RT                                    #  .5 UNIT TARGET VECTOR
012521,000370: 
012522,000371: 23,2244           77616                           RVQ                                            
012523,000372: 
012524,000373: 23,2245           75345        OVERADAY           DLOAD    SIGN                                  
012525,000374: 23,2246           06256                                    1/WIE                                 
012526,000375: 23,2247           03606                                    DTEAROT                               
012527,000376: 23,2250           77621                           BDSU                                           
012528,000377: 23,2251           03606                                    DTEAROT                               
012529,000378: 23,2252           03606                           STORE    DTEAROT                               
012530,000379: 
012531,000380: 23,2253           77650                           GOTO                                           
012532,000381: 23,2254           46225                                    EARROT2                               
012533,000382: 
012534,000383:                                                                                                  #  WIE           2DEC    .1901487997
012535,000384: 23,2255           01015 34732  1/WIE              2DEC     8616410    B-28                       
012536,000385: 23,2257           15373 11346  NB2NB1             2DEC     +.8431756920 B-1                        
012537,000386: 23,2261           00000 00000                     2DEC     0          B-28                       
012538,000387: 23,2263           67313 65307                     2DEC     -.5376381241 B-1                        

Page 288

012540,000389: 23,2265           00000 00000  ZERINFLT           2DEC     0          B-28                       
012541,000390: 23,2267           20000 00000  HALFNFLT           2DEC     .5                                    
012542,000391: 23,2271           00000 00000                     2DEC     0          B-28                       
012543,000392: 23,2273           10464 12470                     2DEC     +.5376381241 B-1                        
012544,000393: 23,2275           00000 00000                     2DEC     0          B-28                       
012545,000394: 23,2277           15373 11346                     2DEC     +.8431756920 B-1                        
012546,000395: 
012547,000396: 
012548,000397: 23,2301           15373 11346  NB1NB2             2DEC     +.8431756920 B-1                        
012549,000398: 23,2303           00000 00000                     2DEC     0          B-28                       
012550,000399: 23,2305           10464 12470                     2DEC     +.5376381241 B-1                        
012551,000400: 23,2307           00000 00000                     2DEC     0          B-28                       
012552,000401: 23,2311           20000 00000                     2DEC     .5                                    
012553,000402: 23,2313           00000 00000                     2DEC     0          B-28                       
012554,000403: 
012555,000404: 23,2315           67313 65307                     2DEC     -.5376381241 B-1                        
012556,000405: 23,2317           00000 00000                     2DEC     0          B-28                       
012557,000406: 23,2321           15373 11346                     2DEC     +.8431756920 B-1                        
012558,000407: 

Page 289

012560,000409: 
012561,000410: 23,2323           07020        10DEGS-            DEC      3600       B-14                       
012562,000411: 
012563,000412: 23,2324           60000        270DEG             OCT      60000                                 #  SHAFT   270 DEGREES    2S COMP.
012564,000413: 23,2325           00000                           OCT      00000                                 
012565,000414: 
012566,000415: 23,2326           61740        20DEGS-            DEC      -07199     B-14                       
012567,000416: 23,2327           77777                           DEC      -00000     B-14                       
012568,000417: 
012569,000418: 23,2330           07020        20DEG-             DEC      03600      B-14                       
012570,000419: 23,2331           00000                           DEC      00000      B-14                       

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