Source Code

These source-code files are part of a reconstructed copy of Comanche 72, the first release of the Apollo Guidance Computer (AGC) Command Module (CM) software for Apollo 13.

They have been adapted from sources files created from a listing of Comanche 55. These source files were updated to match binary dumps of a set of Comanche 67 rope modules. They were then further modified by applying known changes between Comanche 67 and Comanche 72. A binary dump of module B2 of Comanche 72, part number 2010802-021, was also used to validate changes made to banks 05-13. The resulting code assembles to have identical memory-bank checksums as those specified in NASA drawing 2021153G; this gives reasonably high confidence that the changes that have been made are correct. In places where ambiguity exists, this ambiguity is discussed in "## Reconstruction:" comments.

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

011994,000002:                                                                                                  ## Copyright:   Public domain.
011995,000003:                                                                                                  ## Filename:    CSM_GEOMETRY.agc
011996,000004:                                                                                                  ## Purpose:     A section of Comanche revision 072.
011997,000005:                                                                                                  ##              It is part of the reconstructed source code for the first
011998,000006:                                                                                                  ##              release of the software for the Command Module's (CM) Apollo
011999,000007:                                                                                                  ##              Guidance Computer (AGC) for Apollo 13. No original listings
012000,000008:                                                                                                  ##              of this program are available; instead, this file was recreated
012001,000009:                                                                                                  ##              from a printout of Comanche 055, binary dumps of a set of
012002,000010:                                                                                                  ##              Comanche 067 rope modules, and changelogs between Comanche 067
012003,000011:                                                                                                  ##              and 072. It has been adapted such that the resulting bugger words
012004,000012:                                                                                                  ##              exactly match those specified for Comanche 072 in NASA drawing
012005,000013:                                                                                                  ##              2021153G, which gives relatively high confidence that the
012006,000014:                                                                                                  ##              reconstruction is correct.
012007,000015:                                                                                                  ## Assembler:   yaYUL
012008,000016:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
012009,000017:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
012010,000018:                                                                                                  ## Mod history: 2024-05-13 MAS  Created from Comanche 067.
012011,000019: 
012012,000020: 22,2000                                           BANK     22                                    
012013,000021: 23,2000                                           SETLOC   COMGEOM1                              
012014,000022: 23,2000                                           BANK                                           
012015,000023: 
012016,000024:                                                                                                  #  THIS ROUTINE TAKES THE SHAFT AND TRUNNION ANGLES AS READ BY THE CM OPTICAL SYSTEM AND CONVERTS THEM INTO A UNIT
012017,000025:                                                                                                  #  VECTOR REFERENCED TO THE NAVIGATION BASE COORDINATE SYSTEM AND COINCIDENT WITH THE SEXTANT LINE OF SIGHT.
012018,000026: 
012019,000027:                                                                                                  #  THE INPUTS ARE  1) THE SEXTANT SHAFT AND TRUNNION ANGLES ARE STORED SP IN LOCATIONS 3 AND 5 RESPECTIVELY OF THE
012020,000028:                                                                                                  #  MARK VAC AREA.  2) THE COMPLEMENT OF THE BASE ADDRESS OF THE MARK VAC AREA IS STORED SP AT LOCATION X1 OF YOUR
012021,000029:                                                                                                  #  JOB VAC AREA.
012022,000030: 
012023,000031:                                                                                                  #  THE OUTPUT IS A HALF-UNIT VECTOR IN NAVIGATION BASE COORDINATES AND STORED AT LOCATION 32D OF THE VAC AREA. THE
012024,000032:                                                                                                  #  OUTPUT IS ALSO AVAILABLE AT MPAC.
012025,000033: 
012026,000034: 23,2000                                           COUNT    23/GEOM                               
012027,000035: 
012028,000036: 23,2000           47133        SXTNB              SLOAD*   RTB                                   #  PUSHDOWN 00,02,04,(17D-19D),32D-36D
012029,000037: 23,2001           00006                                    5,1                                   #  TRUNNION = TA
012030,000038: 23,2002           45513                                    CDULOGIC                              
012031,000039: 23,2003           41434                           RTB      PUSH                                  
012032,000040: 23,2004           46027                                    SXTLOGIC                              
012033,000041: 23,2005           72556                           SIN      SL1                                   
012034,000042: 23,2006           66606                           PUSH     SLOAD*                                #  PD2 = SIN(TA)
012035,000043: 23,2007           00004                                    3,1                                   #  SHAFT = SA
012036,000044: 23,2010           41434                           RTB      PUSH                                  #  PD4 = SA
012037,000045: 23,2011           45513                                    CDULOGIC                              
012038,000046: 
012039,000047: 23,2012           41346                           COS      DMP                                   
012040,000048: 23,2013           00003                                    2                                     
012041,000049: 23,2014           14041                           STODL    STARM                                 #  COS(SA)SIN(TA)
012042,000050: 
012043,000051: 23,2015           41356                           SIN      DMP                                   
012044,000052: 23,2016           77626                           STADR                                          
012045,000053: 23,2017           63734                           STODL    STARM      +2                         #  SIN(SA)SIN(TA)
012046,000054: 
012047,000055: 23,2020           77746                           COS                                            
012048,000056: 23,2021           24045                           STOVL    STARM      +4                         
012049,000057: 23,2022           00041                                    STARM                                 #  STARM = 32D
012050,000058: 23,2023           76521                           MXV      VSL1                                  
012051,000059: 23,2024           06302                                    NB1NB2                                
012052,000060: 23,2025           00041                           STORE    32D                                   
012053,000061: 23,2026           77616                           RVQ                                            
012054,000062: 
012055,000063: 23,2027           32323        SXTLOGIC           CAF      10DEGS-                               #  CORRECT FOR 19.775 DEGREE OFFSET
012056,000064: 23,2030           26154                           ADS      MPAC                                  
012057,000065: 23,2031           35017                           CAF      QUARTER                               
012058,000066: 23,2032           07256                           TC       SHORTMP                               
012059,000067: 23,2033           06030                           TC       DANZIG                                
012060,000068: 
012061,000069:                                                                                                  #  CALCSXA COMPUTES THE SEXTANT SHAFT AND TRUNNION ANGLES REQUIRED TO POSITION THE OPTICS SUCH THAT A STAR LINE-
012062,000070:                                                                                                  #  OF-SIGHT LIES ALONG THE STAR VECTOR.  THE ROUTINE TAKES THE GIVEN STAR VECTOR AND EXPRESSES IT AS A VECTOR REF-
012063,000071:                                                                                                  #  ERENCED TO THE OPTICS COORDINATE SYSTEM.  IN ADDITION IT SETS UP THREE UNIT VECTORS DEFINING THE X, Y, AND Z AXES
012064,000072:                                                                                                  #  REFERENCED TO THE OPTICS COORDINATE SYSTEM.
012065,000073: 
012066,000074:                                                                                                  #  THE INPUTS ARE  1) THE STAR VECTOR REFERRED TO PRESENT STABLE MEMBER COORDINATES STORED AT STAR.  2) SAME ANGLE
012067,000075:                                                                                                  #  INPUT AS *SMNB*, I.E. SINES AND COSINES OF THE CDU ANGLES, IN THE ORDER Y Z X, AT SINCDU AND COSCDU.  A CALL
012068,000076:                                                                                                  #  TO CDUTRIG WILL PROVIDE THIS INPUT.
012069,000077: 
012070,000078:                                                                                                  #  THE OUTPUTS ARE THE SEXTANT SHAFT AND TRUNNION ANGLES STORED DP AT SAC AND PAC RESPECTIVELY.  (LOW ORDER PART
012071,000079:                                                                                                  #  EQUAL TO ZERO).
012072,000080: 
012073,000081: 23,2034           77220        CALCSXA            ITA      VLOAD                                 #  PUSHDOWN 00-26D, 28D, 30D, 32D-36D
012074,000082: 23,2035           00034                                    28D                                   
012075,000083: 23,2036           02766                                    STAR                                  
012076,000084: 23,2037           77624                           CALL                                           
012077,000085: 23,2040           47646                                    *SMNB*                                
012078,000086: 23,2041           76521                           MXV      VSL1                                  
012079,000087: 23,2042           06260                                    NB2NB1                                
012080,000088: 23,2043           26766                           STOVL    STAR                                  
012081,000089: 23,2044           15332                                    HIUNITX                               
012082,000090: 23,2045           26555                           STOVL    XNB1                                  
012083,000091: 23,2046           15330                                    HIUNITY                               
012084,000092: 23,2047           26563                           STOVL    YNB1                                  
012085,000093: 23,2050           15326                                    HIUNITZ                               
012086,000094: 23,2051           36571                           STCALL   ZNB1                                  
012087,000095: 23,2052           46076                                    SXTANG1                               
012088,000096: 
012089,000097:                                                                                                  #  SXTANG COMPUTES THE SEXTANT SHAFT AND TRUNNION ANGLES REQUIRED TO POSITION THE OPTICS SUCH THAT A STAR LINE-OF-
012090,000098:                                                                                                  #  SIGHT LIES ALONG THE STAR VECTOR.
012091,000099: 
012092,000100:                                                                                                  #  THE INPUTS ARE  1) THE STAR VECTOR REFERRED TO ANY COORDINATE SYSTEM STORED AT STAR.  2) THE NAVIGATION BASE
012093,000101:                                                                                                  #  COORDINATES REFERRED TO THE SAME COORDINATE SYSTEM.  THESE THREE HALF-UNIT VECTORS ARE STORED AT XNB, YNB,AND
012094,000102:                                                                                                  #  ZNB.
012095,000103: 
012096,000104:                                                                                                  #  THE OUTPUTS ARE THE SEXTANT SHAFT AND TRUNNION ANGLES STORED DP AT SAC AND PAC RESPECTIVELY.  (LOW ORDER PART
012097,000105:                                                                                                  #  EQUAL TO ZERO).
012098,000106: 
012099,000107: 23,2053           47020        SXTANG             ITA      RTB                                   #  PUSHDOWN 16D,18D,22D-26D,28D
012100,000108: 23,2054           00034                                    28D                                   
012101,000109: 23,2055           45662                                    TRANSP1                               #  EREF WRT NB2
012102,000110: 23,2056           64375                           VLOAD    MXV                                   
012103,000111: 23,2057           02714                                    XNB                                   
012104,000112: 23,2060           06260                                    NB2NB1                                
012105,000113: 23,2061           77772                           VSL1                                           
012106,000114: 23,2062           26555                           STOVL    XNB1                                  
012107,000115: 23,2063           02722                                    YNB                                   
012108,000116: 23,2064           76521                           MXV      VSL1                                  
012109,000117: 23,2065           06260                                    NB2NB1                                
012110,000118: 23,2066           26563                           STOVL    YNB1                                  
012111,000119: 23,2067           02730                                    ZNB                                   
012112,000120: 23,2070           76521                           MXV      VSL1                                  
012113,000121: 23,2071           06260                                    NB2NB1                                
012114,000122: 23,2072           02571                           STORE    ZNB1                                  
012115,000123: 
012116,000124: 23,2073           47034                           RTB      RTB                                   
012117,000125: 23,2074           45662                                    TRANSP1                               
012118,000126: 23,2075           45676                                    TRANSP2                               
012119,000127: 
012120,000128: 23,2076           47375        SXTANG1            VLOAD    VXV                                   
012121,000129: 23,2077           02571                                    ZNB1                                  
012122,000130: 23,2100           02766                                    STAR                                  
012123,000131: 23,2101           77600                           BOV                                            
012124,000132: 23,2102           46103                                    +1                                    
012125,000133: 23,2103           40056                           UNIT     BOV                                   
012126,000134: 23,2104           46145                                    ZNB=S1                                
012127,000135: 23,2105           00027                           STORE    PDA                                   #  PDA = UNIT(ZNB X S)
012128,000136: 
012129,000137: 23,2106           57441                           DOT      DCOMP                                 
012130,000138: 23,2107           02555                                    XNB1                                  
012131,000139: 23,2110           24023                           STOVL    SINTH                                 #  SIN(SA) = PDA . -XNB
012132,000140: 23,2111           00027                                    PDA                                   
012133,000141: 
012134,000142: 23,2112           77641                           DOT                                            
012135,000143: 23,2113           02563                                    YNB1                                  
012136,000144: 23,2114           34021                           STCALL   COSTH                                 #  COS(SA) = PDA . YNB
012137,000145: 23,2115           47260                                    ARCTRIG                               
012138,000146: 23,2116           77634                           RTB                                            
012139,000147: 23,2117           45546                                    1STO2S                                
012140,000148: 23,2120           26774                           STOVL    SAC                                   
012141,000149: 23,2121           02766                                    STAR                                  
012142,000150: 23,2122           77600                           BOV                                            
012143,000151: 23,2123           46124                                    +1                                    
012144,000152: 23,2124           72441                           DOT      SL1                                   
012145,000153: 23,2125           02571                                    ZNB1                                  
012146,000154: 23,2126           77726                           ACOS                                           
012147,000155: 23,2127           62440                           BMN      SL2                                   
012148,000156: 23,2130           46142                                    SXTALARM                              #  TRUNNION ANGLE NEGATIVE
012149,000157: 23,2131           45200                           BOV      DSU                                   
012150,000158: 23,2132           46142                                    SXTALARM                              #  TRUNNION ANGLE GREATER THAN 90 DEGREES
012151,000159: 23,2133           06331                                    20DEG-                                
012152,000160: 23,2134           77634                           RTB                                            
012153,000161: 23,2135           45546                                    1STO2S                                
012154,000162: 23,2136           02776                           STORE    PAC                                   #  FOR FLIGHT USE, CULTFLAG IS ON IF
012155,000163: 23,2137           77614                           CLRGO                                          #  TRUNION IS GREATER THAN 90 DEG
012156,000164: 23,2140           01630                                    CULTFLAG                              
012157,000165: 23,2141           00034                                    28D                                   
012158,000166: 23,2142           77614        SXTALARM           SETGO                                          #  ALARM HAS BEEN REMOVED FROM THIS
012159,000167: 23,2143           01430                                    CULTFLAG                              
012160,000168: 23,2144           00034                                    28D                                   #  SUBROUTINE, ALARM WILL BE SET BY MPI
012161,000169: 23,2145           77745        ZNB=S1             DLOAD                                          
012162,000170: 23,2146           06325                                    270DEG                                
012163,000171: 23,2147           16774                           STODL    SAC                                   
012164,000172: 23,2150           06327                                    20DEGS-                               
012165,000173: 23,2151           02776                           STORE    PAC                                   
012166,000174: 23,2152           77614                           CLRGO                                          
012167,000175: 23,2153           01630                                    CULTFLAG                              
012168,000176: 23,2154           00034                                    28D                                   
012169,000177: 
012170,000178:                                                                                                  #  THESE TWO ROUTINES COMPUTE THE ACTUAL STATE VECTOR FOR LM, CSM BY ADDING
012171,000179:                                                                                                  #  THE CONIC R,V AND THE DEVIATIONS R,V.  THE STATE VECTORS ARE CONVERTED TO
012172,000180:                                                                                                  #  METERS B-29 AND METERS/CSEC B-7 AND STORED APPROPRIATELY IN RN,VN OR
012173,000181:                                                                                                  #  R-OTHER, V-OTHER FOR DOWNLINK.  THE ROUTINES NAMES ARE SWITCHED IN THE
012174,000182:                                                                                                  #  OTHER VEHICLES COMPUTER.
012175,000183: 
012176,000184:                                                                                                  #  INPUT
012177,000185:                                                                                                  #        STATE VECTOR IN TEMPORARY STORAGE AREA
012178,000186:                                                                                                  #        IF STATE VECTOR IS SCALED POS B27 AND VEL B5
012179,000187:                                                                                                  #                SET X2 TO +2
012180,000188:                                                                                                  #        IF STATE VECTOR IS SCALED POS B29 AND VEL B7
012181,000189:                                                                                                  #                SET X2 TO 0
012182,000190: 
012183,000191:                                                                                                  #  OUTPUT
012184,000192:                                                                                                  #        R(T) IN RN, V(T) IN VN, T IN PIPTIME
012185,000193:                                                                                                  #                OR
012186,000194:                                                                                                  #        R(T) IN R-OTHER, V(T) IN V-OTHER        (T IS DEFINED BY T-OTHER)
012187,000195: 
012188,000196: 23,2155                                           BANK     23                                    
012189,000197: 10,2000                                           SETLOC   COMGEOM2                              
012190,000198: 10,2000                                           BANK                                           
012191,000199: 10,2237                                           COUNT    10/GEOM                               
012192,000200: 10,2237           43414        SVDWN1             BOF      RVQ                                   #  SW=1=AVETOMID DOING W-MATRIX INTEG
012193,000201: 10,2240           04756                                    AVEMIDSW                              
012194,000202: 10,2241           20242                                    +1                                    
012195,000203: 10,2242           53775                           VLOAD    VSL*                                  
012196,000204: 10,2243           01521                                    TDELTAV                               
012197,000205: 10,2244           57605                                    0          -7,2                       
012198,000206: 10,2245           53655                           VAD      VSL*                                  
012199,000207: 10,2246           01535                                    RCV                                   
012200,000208: 10,2247           57576                                    0,2                                   
012201,000209: 10,2250           25171                           STOVL    RN                                    
012202,000210: 10,2251           01527                                    TNUV                                  
012203,000211: 10,2252           53257                           VSL*     VAD                                   
012204,000212: 10,2253           57602                                    0          -4,2                       
012205,000213: 10,2254           01543                                    VCV                                   
012206,000214: 10,2255           77657                           VSL*                                           
012207,000215: 10,2256           57576                                    0,2                                   
012208,000216: 10,2257           15177                           STODL    VN                                    
012209,000217: 10,2260           01517                                    TET                                   
012210,000218: 10,2261           01205                           STORE    PIPTIME                               
012211,000219: 10,2262           77616                           RVQ                                            
012212,000220: 
012213,000221: 10,2263           53775        SVDWN2             VLOAD    VSL*                                  
012214,000222: 10,2264           01521                                    TDELTAV                               
012215,000223: 10,2265           57605                                    0          -7,2                       
012216,000224: 10,2266           53655                           VAD      VSL*                                  
012217,000225: 10,2267           01535                                    RCV                                   
012218,000226: 10,2270           57576                                    0,2                                   
012219,000227: 10,2271           25722                           STOVL    R-OTHER                               
012220,000228: 10,2272           01527                                    TNUV                                  
012221,000229: 10,2273           53257                           VSL*     VAD                                   
012222,000230: 10,2274           57602                                    0          -4,2                       
012223,000231: 10,2275           01543                                    VCV                                   
012224,000232: 10,2276           77657                           VSL*                                           
012225,000233: 10,2277           57576                                    0,2                                   
012226,000234: 10,2300           01730                           STORE    V-OTHER                               
012227,000235: 10,2301           77616                           RVQ                                            
012228,000236: 
012229,000237:                                                                                                  #  SUBROUTINE TO COMPUTE THE NATURAL LOG OF C(MPAC, MPAC +1).
012230,000238: 
012231,000239:                                                                                                  #        ENTRY:  CALL
012232,000240:                                                                                                  #                        LOG
012233,000241: 
012234,000242:                                                                                                  #  SUBROUTINE RETURNS WITH -LOG IN DP MPAC.
012235,000243: 
012236,000244:                                                                                                  #  EBANK IS ARBITRARY..
012237,000245: 
012238,000246: 14,2000                                           BANK     14                                    
012239,000247: 23,2000                                           SETLOC   POWFLIT2                              
012240,000248: 23,2000                                           BANK                                           
012241,000249: 23,2155                                           COUNT    23/GEOM                               
012242,000250: 
012243,000251: 23,2155           44301        LOG                NORM     BDSU                                  #  GENERATES LOG BY SHIFTING ARG
012244,000252: 23,2156           00160                                    MPAC       +3                         #  UNTIL IT LIES BETWEEN .5 AND 1.
012245,000253: 23,2157           06212                                    NEARLY1                               #  THE LOG OF THIS PART IS FOUND AND THE
012246,000254: 23,2160           77776                           EXIT                                           #  LOG OF THE SHIFTED PART IS COMPUTED
012247,000255: 23,2161           07171                           TC       POLY                                  #  AND ADDED IN.  SHIFT COUNT STORED
012248,000256: 23,2162           00002                           DEC      2          B-14                       #  (N-1, SUPPLIED BY SMERZH)
012249,000257: 23,2163           00000 00000                     2DEC     0          B-28                       #  IN MPAC +3.
012250,000258: 23,2165           01001 14636                     2DEC     .031335467                            
012251,000259: 23,2167           00325 07310                     2DEC     .0130145859                            
012252,000260: 23,2171           00541 16735                     2DEC     .0215738898                            
012253,000261: 
012254,000262: 23,2173           35035                           CAF      ZERO                                  
012255,000263: 23,2174           54156                           TS       MPAC       +2                         
012256,000264: 23,2175           00006                           EXTEND                                         
012257,000265: 23,2176           32214                           DCA      CLOG2/32                              
012258,000266: 23,2177           52155                           DXCH     MPAC                                  
012259,000267: 23,2200           52160                           DXCH     MPAC       +3                         
012260,000268: 23,2201           40000                           COM                                            #  LOAD POSITIVE SHIFT COUNT IN A.
012261,000269: 23,2202           07256                           TC       SHORTMP                               #  MULTIPLY BY SHIFT COUNT.
012262,000270: 
012263,000271: 23,2203           52156                           DXCH     MPAC       +1                         
012264,000272: 23,2204           52155                           DXCH     MPAC                                  
012265,000273: 23,2205           52160                           DXCH     MPAC       +3                         
012266,000274: 23,2206           20155                           DAS      MPAC                                  
012267,000275: 23,2207           06006                           TC       INTPRET                               #  RESULT IN MPAC, MPAC +1
012268,000276: 
012269,000277: 23,2210           77616                           RVQ                                            
012270,000278: 
012271,000279: 23,2211           37777 37777  NEARLY1            2DEC     .999999999                            
012272,000280: 
012273,000281: 23,2213           00542 34414  CLOG2/32           2DEC     .0216608494                            
012274,000282: 
012275,000283:                                                                                                  #  SUBROUTINE NAME:  EARTH ROTATOR       (EARROT1 OR EARROT2)            DATE:  15 FEB 67
012276,000284:                                                                                                  #  MOD NO:  N +1                                                         LOG SECTION:  POWERED FLIGHT SUBROS
012277,000285:                                                                                                  #  MOD BY:  ENTRY GROUP (BAIRNSFATHER)
012278,000286: 
012279,000287:                                                                                                  #  FUNCTIONAL DESCRIPTION:  THIS ROUTINE PROJECTS THE INITIAL EARTH TARGET VECTOR RTINIT AHEAD THROUGH
012280,000288:                                                                                                  #        THE ESTIMATED TIME OF FLIGHT.  INITIAL CALL RESOLVES THE INITIAL TARGET VECTOR RTINIT INTO EASTERLY
012281,000289:                                                                                                  #        AND NORMAL COMPONENTS RTEAST AND RTNORM.  INITIAL AND SUBSEQUENT CALLS ROTATE THIS VECTOR
012282,000290:                                                                                                  #        ABOUT THE (FULL) UNIT POLAR AXIS UNITW THROUGH THE ANGLE  WIE DTEAROT  TO OBTAIN THE ROTATED
012283,000291:                                                                                                  #        TARGET VECTOR RT.  ALL VECTORS EXCEPT UNITW ARE HALF UNIT.
012284,000292:                                                                                                  #        THE EQUATIONS ARE
012285,000293:                                                                                                  #                -    -        -                      -
012286,000294:                                                                                                  #                RT = RTINIT + RTNORM (COS(WT) - 1) + RTEAST SIN(WT)
012287,000295: 
012288,000296:                                                                                                  #        WHERE   WT = WIE DTEAROT
012289,000297: 
012290,000298:                                                                                                  #                RTINIT = INITIAL TARGET VECTOR
012291,000299:                                                                                                  #                -        -       -
012292,000300:                                                                                                  #                RTEAST = UNITW * RTINIT
012293,000301:                                                                                                  #                -        -        -
012294,000302:                                                                                                  #                RTNORM = RTEAST * UNITW
012295,000303: 
012296,000304:                                                                                                  #        FOR CONTINUOUS UPDATING, ONLY ONE ENTRY TO EARROT1 IS REQUIRED, WITH SUBSEQUENT ENTRIES AT EARROT2.
012297,000305:                                                                                                  #        
012298,000306:                                                                                                  #  CALLING SEQUENCE:     FIRST CALL                      SUBSEQUENT CALL
012299,000307:                                                                                                  #                        STCALL  DTEAROT                 STCALL  DTEAROT
012300,000308:                                                                                                  #                                EARROT1                         EARROT2
012301,000309:                                                                                                  #                        C(MPAC) UNSPECIFIED             C(MPAC) = DTEAROT
012302,000310:                                                                                                  #        PUSHLOC = PDL+0, ARBITRARY.  6 LOCATIONS USED.
012303,000311: 
012304,000312:                                                                                                  #  SUBROUTINES USED:  NONE
012305,000313: 
012306,000314:                                                                                                  #  NORMAL EXIT MODES:  RVQ
012307,000315: 
012308,000316:                                                                                                  #  ALARMS:  NONE
012309,000317: 
012310,000318:                                                                                                  #  OUTPUT:       RTEAST  (-1)            .5 UNIT VECTOR EAST, COMPNT OF RTINIT   LEFT BY FIRST CALL
012311,000319:                                                                                                  #                RTNORM  (-1)            .5 UNIT VECTOR NORML, COMPNT OF RTINIT  LEFT BY FIRST CALL
012312,000320:                                                                                                  #                RT      (-1)            .5 UNIT TARGET VECTOR, ROTATED          LEFT BY ALL CALLS
012313,000321:                                                                                                  #                DTEAROT (-28) CS        MAY BE CHANGED BY EARROT2, IF OVER 1 DAY
012314,000322: 
012315,000323:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED:
012316,000324:                                                                                                  #                UNITW   (0)             UNIT POLAR VECTOR                       PAD LOADED
012317,000325:                                                                                                  #                RTINIT  (-1)            .5 UNIT INITIAL TARGET VECTOR           LEFT BY ENTRY
012318,000326:                                                                                                  #                DTEAROT (-28) CS        TIME OF FLIGHT                          LEFT BY CALLER
012319,000327: 
012320,000328:                                                                                                  #  DEBRIS:  QPRET, PDL+0 ... PDL+5
012321,000329: 23,2215  E7,1451                                  EBANK=   RTINIT                                
012322,000330: 
012323,000331: 23,2215           47375        EARROT1            VLOAD    VXV                                   
012324,000332: 23,2216           01714                                    UNITW                                 #  FULL UNIT VECTOR
012325,000333: 23,2217           03452                                    RTINIT                                #  .5 UNIT
012326,000334: 23,2220           03460                           STORE    RTEAST                                #  .5 UNIT
012327,000335: 
012328,000336: 23,2221           77635                           VXV                                            
012329,000337: 23,2222           01714                                    UNITW                                 #  FULL UNIT
012330,000338: 23,2223           17466                           STODL    RTNORM                                #  .5 UNIT
012331,000339: 23,2224           03606                                    DTEAROT                               #  (-28) CS
012332,000340: 
012333,000341: 23,2225           56204        EARROT2            BOVB     DDV                                   
012334,000342: 23,2226           57353                                    TCDANZIG                              #  RESET OVFIND, IF ON
012335,000343: 23,2227           06256                                    1/WIE                                 
012336,000344: 23,2230           41400                           BOV      PUSH                                  
012337,000345: 23,2231           46245                                    OVERADAY                              
012338,000346: 23,2232           45346                           COS      DSU                                   
012339,000347: 23,2233           15332                                    HIDPHALF                              
012340,000348: 23,2234           65361                           VXSC     PDDL                                  #  XCH W PUSH LIST
012341,000349: 23,2235           03466                                    RTNORM                                #  .5 UNIT
012342,000350: 23,2236           74356                           SIN      VXSC                                  
012343,000351: 23,2237           03460                                    RTEAST                                #  .5 UNIT
012344,000352: 23,2240           76455                           VAD      VSL1                                  
012345,000353: 23,2241           53455                           VAD      UNIT                                  #  INSURE THAT RT IS 'UNIT'.
012346,000354: 23,2242           03452                                    RTINIT                                #  .5 UNIT
012347,000355: 23,2243           03474                           STORE    RT                                    #  .5 UNIT TARGET VECTOR
012348,000356: 
012349,000357: 23,2244           77616                           RVQ                                            
012350,000358: 
012351,000359: 23,2245           75345        OVERADAY           DLOAD    SIGN                                  
012352,000360: 23,2246           06256                                    1/WIE                                 
012353,000361: 23,2247           03606                                    DTEAROT                               
012354,000362: 23,2250           77621                           BDSU                                           
012355,000363: 23,2251           03606                                    DTEAROT                               
012356,000364: 23,2252           03606                           STORE    DTEAROT                               
012357,000365: 
012358,000366: 23,2253           77650                           GOTO                                           
012359,000367: 23,2254           46225                                    EARROT2                               
012360,000368: 
012361,000369:                                                                                                  # WIE            2DEC    .1901487997
012362,000370: 23,2255           01015 34732  1/WIE              2DEC     8616410    B-28                       
012363,000371: 23,2257           15373 11346  NB2NB1             2DEC     +.8431756920 B-1                        
012364,000372: 23,2261           00000 00000                     2DEC     0          B-28                       
012365,000373: 23,2263           67313 65307                     2DEC     -.5376381241 B-1                        
012366,000374: 23,2265           00000 00000  ZERINFLT           2DEC     0          B-28                       
012367,000375: 23,2267           20000 00000  HALFNFLT           2DEC     .5                                    
012368,000376: 23,2271           00000 00000                     2DEC     0          B-28                       
012369,000377: 23,2273           10464 12470                     2DEC     +.5376381241 B-1                        
012370,000378: 23,2275           00000 00000                     2DEC     0          B-28                       
012371,000379: 23,2277           15373 11346                     2DEC     +.8431756920 B-1                        
012372,000380: 23,2301           15373 11346  NB1NB2             2DEC     +.8431756920 B-1                        
012373,000381: 23,2303           00000 00000                     2DEC     0          B-28                       
012374,000382: 23,2305           10464 12470                     2DEC     +.5376381241 B-1                        
012375,000383: 23,2307           00000 00000                     2DEC     0          B-28                       
012376,000384: 23,2311           20000 00000                     2DEC     .5                                    
012377,000385: 23,2313           00000 00000                     2DEC     0          B-28                       
012378,000386: 23,2315           67313 65307                     2DEC     -.5376381241 B-1                        
012379,000387: 23,2317           00000 00000                     2DEC     0          B-28                       
012380,000388: 23,2321           15373 11346                     2DEC     +.8431756920 B-1                        
012381,000389: 23,2323           07020        10DEGS-            DEC      3600       B-14                       
012382,000390: 23,2324           60000        270DEG             OCT      60000                                 #  SHAFT 270 DEGREES     2S COMP.
012383,000391: 23,2325           00000                           OCT      00000                                 
012384,000392: 23,2326           61740        20DEGS-            DEC      -07199     B-14                       
012385,000393: 23,2327           77777                           DEC      -00000     B-14                       
012386,000394: 23,2330           07020        20DEG-             DEC      03600      B-14                       
012387,000395: 23,2331           00000                           DEC      00000      B-14                       
012388,000396: 

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