Source Code

These source-code files are part of a reconstructed copy of Luminary 98, a development version of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer (AGC) software.

The reconstruction began with source code of Luminary 99 revision 1 previously transcribed from a digitized copy of that program. The code was then updated by undoing changes described in original Luminary memo 85, using asterisks indicating changed lines in the listing as a guide. While no listing of this version is known to exist, nor are the memory-bank checksums available, the reconstruction is believed to be correct because it was an an intermediate step in reconstructing Luminary 97 whose reconstruction was verified by matching memory-bank checksums to those listed in drawing 2021152G. Note that page numbers in the reconstructed code match those on the Luminary 099 revision 001 printout, although the added code would likely have changed page numbers for a real Luminary 98 listing.

Comments from the original source code are prefixed with a single '#' symbol, whereas comments added later are prefixed by "##" or "###". Report any errors noted by creating an issue report at the Virtual AGC project's GitHub repository.

038283,000002:                                                                                                  ## Copyright:   Public domain.
038284,000003:                                                                                                  ## Filename:    LANDING_ANALOG_DISPLAYS.agc
038285,000004:                                                                                                  ## Purpose:     A section of Luminary revision 98.
038286,000005:                                                                                                  ##              It is part of the reconstructed source code for the a
038287,000006:                                                                                                  ##              development version of the flight software for the Lunar 
038288,000007:                                                                                                  ##              Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
038289,000008:                                                                                                  ##              The code has been recreated from a copy of Luminary 99
038290,000009:                                                                                                  ##              revision 001, using asterisks indicating changed lines in
038291,000010:                                                                                                  ##              the listing and Luminary Memo #85, which lists changes between
038292,000011:                                                                                                  ##              Luminary 98 and 99.
038293,000012:                                                                                                  ## Reference:   pp. 898-907
038294,000013:                                                                                                  ## Assembler:   yaYUL
038295,000014:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
038296,000015:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
038297,000016:                                                                                                  ## Mod history: 2019-07-28 MAS  Created from Luminary 99.
038298,000017: 

Page 898

038300,000019: 21,2154                                           BANK     21                                    
038301,000020: 21,2000                                           SETLOC   R10                                   
038302,000021: 21,2000                                           BANK                                           
038303,000022: 
038304,000023: 21,2154  E7,1536                                  EBANK=   UNIT/R/                               
038305,000024: 21,2154                                           COUNT*   $$/R10                                
038306,000025: 
038307,000026: 21,2154           23714        LANDISP            LXCH     PIPCTR1                               #  UPDATE TBASE2 AND PIPCTR SIMULTANEOUSLY.
038308,000027: 21,2155           40025                           CS       TIME1                                 
038309,000028: 21,2156           53056                           DXCH     TBASE2                                
038310,000029: 
038311,000030: 21,2157           40103                           CS       FLAGWRD7                              #  IS LANDING ANALOG DISPLAYS FLAG SET?
038312,000031: 21,2160           74741                           MASK     SWANDBIT                              
038313,000032: 21,2161           10000                           CCS      A                                     
038314,000033: 21,2162           13053                           TCF      DISPRSET                              #  NO.
038315,000034: 21,2163           31303                           CA       IMODES33                              #  BIT 7 = 0 (DO ALTRATE), =1 (DO ALT.)
038316,000035: 21,2164           74745                           MASK     BIT7                                  
038317,000036: 21,2165           10000                           CCS      A                                     
038318,000037: 21,2166           12240                           TCF      ALTOUT                                
038319,000038: 21,2167           02324        ALTROUT            TC       DISINDAT                              #  CHECK MODE SELECT SWITCH AND DIDFLG.
038320,000039: 21,2170           41303                           CS       IMODES33                              
038321,000040: 21,2171           74745                           MASK     BIT7                                  
038322,000041: 21,2172           27303                           ADS      IMODES33                              #  ALTERNATE ALTITUDE RATE WITH ALTITUDE.
038323,000042: 21,2173           34752                           CAF      BIT2                                  #  RATE COMMAND IS EXECUTED BEFORE RANGE.
038324,000043: 21,2174           00006                           EXTEND                                         
038325,000044: 21,2175           05014                           WOR      CHAN14                                #  ALTRATE (BIT2 = 1), ALTITUDE (BIT2 = 0).
038326,000045: 21,2176           31743        ARCOMP             CA       RUNIT                                 #  COMPUTE ALTRATE = RUNIT.VVECT M/CS *2(-6).
038327,000046: 21,2177           00006                           EXTEND                                         
038328,000047: 21,2200           71706                           MP       VVECT                                 #  MULTIPLY X-COMPONENTS.
038329,000048: 21,2201           56070                           XCH      RUPTREG1                              #  SAVE SINGLE PRECISION RESULT M/CS*2(-6).
038330,000049: 21,2202           31744                           CA       RUNIT      +1                         #  MULTIPLY Y-COMPONENTS.
038331,000050: 21,2203           00006                           EXTEND                                         
038332,000051: 21,2204           71707                           MP       VVECT      +1                         
038333,000052: 21,2205           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038334,000053: 21,2206           31745                           CA       RUNIT      +2                         #  MULTIPLY Z-COMPONENTS.
038335,000054: 21,2207           00006                           EXTEND                                         
038336,000055: 21,2210           71710                           MP       VVECT      +2                         
038337,000056: 21,2211           26070                           ADS      RUPTREG1                              #  ALTITUDE RATE IN M/CS *2(-6).
038338,000057: 21,2212           32000                           CA       ARCONV                                #  CONVERT ALTRATE TO BIT UNITS (.5FPS/BIT)
038339,000058: 21,2213           00006                           EXTEND                                         
038340,000059: 21,2214           70070                           MP       RUPTREG1                              
038341,000060: 21,2215           20001                           DDOUBL                                         
038342,000061: 21,2216           20001                           DDOUBL                                         
038343,000062: 21,2217           56070                           XCH      RUPTREG1                              #  ALTITUDE RATE IN BIT UNITS*2(-14).
038344,000063: 21,2220           31716                           CA       DALTRATE                              #  ALTITUDE RATE COMPENSATION FACTOR.
038345,000064: 21,2221           00006                           EXTEND                                         
038346,000065: 21,2222           71715                           MP       DT                                    
038347,000066: 21,2223           60070                           AD       RUPTREG1                              
038348,000067: 21,2224           55711                           TS       ALTRATE                               #  ALTITUDE RATE IN BIT UNITS*2(-14).
038349,000068: 21,2225           41711                           CS       ALTRATE                               

Page 899

038351,000070: 21,2226           00006                           EXTEND                                         #  CHECK POLARITY OF ALTITUDE RATE.
038352,000071: 21,2227           62231                           BZMF     +2                                    
038353,000072: 21,2230           12233                           TCF      DATAOUT                               #  NEGATIVE - SEND POS. PULSES TO ALTM REG.
038354,000073: 21,2231           31711                           CA       ALTRATE                               #  POSITIVE OR ZERO - SET SIGN BIT = 1 AND
038355,000074: 21,2232           64735                           AD       BIT15                                 #  SEND TO ALTM REGISTER.  *DO NOT SEND +0*
038356,000075: 21,2233           54060        DATAOUT            TS       ALTM                                  #  ACTIVATE THE LANDING ANALOG DISPLAYS - -
038357,000076: 21,2234           34751                           CAF      BIT3                                  
038358,000077: 21,2235           00006                           EXTEND                                         
038359,000078: 21,2236           05014                           WOR      CHAN14                                #  BIT3 DRIVES THE ALT/ALTRATE METER.
038360,000079: 21,2237           15261                           TCF      TASKOVER                              #  EXIT
038361,000080: 
038362,000081: 21,2240           02324        ALTOUT             TC       DISINDAT                              #  CHECK MODE SELECT SWITCH AND DIDFLG.
038363,000082: 21,2241           44745                           CS       BIT7                                  
038364,000083: 21,2242           71303                           MASK     IMODES33                              
038365,000084: 21,2243           55303                           TS       IMODES33                              #  ALTERNATE ALTITUDE RATE WITH ALTITUDE.
038366,000085: 21,2244           44752                           CS       BIT2                                  
038367,000086: 21,2245           00006                           EXTEND                                         
038368,000087: 21,2246           03014                           WAND     CHAN14                                
038369,000088: 21,2247           11741                           CCS      ALTBITS                               #  = -1 IF OLD ALT. DATA TO BE EXTRAPOLATED.
038370,000089: 21,2250           12254                           TCF      +4                                    
038371,000090: 21,2251           12254                           TCF      +3                                    
038372,000091: 21,2252           12272                           TCF      OLDDATA                               
038373,000092: 21,2253           55741                           TS       ALTBITS                               #  SET ALTBITS FROM -0 TO +0.
038374,000093: 21,2254           44753                           CS       ONE                                   
038375,000094: 21,2255           53742                           DXCH     ALTBITS                               #  SET ALTBITS = -1 FOR SWITCH USE NEXT PASS.
038376,000095: 21,2256           53713                           DXCH     ALTSAVE                               
038377,000096: 21,2257           34742                           CA       BIT10                                 #  NEW ALTITUDE EXTRAPOLATION WITH ALTRATE.
038378,000097: 21,2260           56002                           XCH      Q                                     
038379,000098: 21,2261           22007                           LXCH     7                                     #  ZL
038380,000099: 21,2262           31715                           CA       DT                                    
038381,000100: 21,2263           00006                           EXTEND                                         
038382,000101: 21,2264           10002                           DV       Q                                     #  RESCALE DT*2(-14) TO *2(-9) TIME IN CS.
038383,000102: 21,2265           00006                           EXTEND                                         
038384,000103: 21,2266           72002                           MP       ARTOA2                                #  .0021322 *2(+8)
038385,000104: 21,2267           12273                           TCF      OLDDATA    +1                         #  RATE APPLIES FOR DT CS.
038386,000105: 
038387,000106: 21,2270           53713        ZDATA2             DXCH     ALTSAVE                               
038388,000107: 21,2271           12313                           TCF      NEWDATA                               
038389,000108: 21,2272           32001        OLDDATA            CA       ARTOA                                 #  RATE APPLIES FOR .5 SEC. (4X/SEC. CYCLE)
038390,000109: 21,2273           00006                           EXTEND                                         
038391,000110: 21,2274           71711                           MP       ALTRATE                               #  EXTRAPOLATE WITH ALTITUDE RATE.
038392,000111: 21,2275           20001                           DDOUBL                                         
038393,000112: 21,2276           61713                           AD       ALTSAVE    +1                         
038394,000113: 21,2277           55713                           TS       ALTSAVE    +1                         
038395,000114: 21,2300           34755                           CAF      ZERO                                  
038396,000115: 21,2301           27712                           ADS      ALTSAVE                               
038397,000116: 21,2302           34733                           CAF      POSMAX                                #  FORCE SIGN AGREEMENT ASSUMING A
038398,000117: 21,2303           64753                           AD       ONE                                   #  NON-NEGATIVE ALTSAVE.
038399,000118: 21,2304           61713                           AD       ALTSAVE    +1                         #  IF ALTSAVE IS NEGATIVE, ZERO ALTSAVE
038400,000119: 21,2305           55713                           TS       ALTSAVE    +1                         #  AND ALTSAVE +1 AT ZERODATA.

Page 900

038402,000121: 21,2306           34755                           CAF      ZERO                                  
038403,000122: 21,2307           64733                           AD       POSMAX                                
038404,000123: 21,2310           61712                           AD       ALTSAVE                               
038405,000124: 21,2311           55712                           TS       ALTSAVE                               #  POSSIBLY SKIP TO NEWDATA.
038406,000125: 21,2312           13050                           TCF      ZERODATA                              
038407,000126: 21,2313           11713        NEWDATA            CCS      ALTSAVE    +1                         
038408,000127: 21,2314           12320                           TCF      +4                                    
038409,000128: 21,2315           12320                           TCF      +3                                    
038410,000129: 21,2316           34755                           CAF      ZERO                                  #  SET NEGATIVE ALTSAVE +1 TO +0.
038411,000130: 21,2317           55713                           TS       ALTSAVE    +1                         
038412,000131: 21,2320           11712                           CCS      ALTSAVE                               #  PROVIDE A 15 BIT UNSIGNED OUTPUT.
038413,000132: 21,2321           34735                           CAF      BIT15                                 #  THE HI-ORDER PART IS +1 OR +0.
038414,000133: 21,2322           61713                           AD       ALTSAVE    +1                         
038415,000134: 21,2323           12233                           TCF      DATAOUT                               #  DISPATCH UNSIGNED BITS TO ALTM REG.
038416,000135: 21,2324           00006        DISINDAT           EXTEND                                         
038417,000136: 21,2325           23714                           QXCH     LADQSAVE                              #  SAVE RETURN TO ALTROUT +1 OR ALTOUT +1
038418,000137: 21,2326           34746                           CAF      BIT6                                  
038419,000138: 21,2327           00006                           EXTEND                                         #  WISHETH THE ASTRONAUT THE ANALOG
038420,000139: 21,2330           02030                           RAND     CHAN30                                #  DISPLAYS?  I.E.,
038421,000140: 21,2331           10000                           CCS      A                                     #  IS THE MODE SELECT SWITCH IN PGNCS?
038422,000141: 21,2332           13053                           TCF      DISPRSET                              #  NO.  ASTRONAUT REQUESTS NO INERTIAL DATA
038423,000142: 21,2333           40075                           CS       FLAGWRD1                              #  YES.  CHECK STATUS OF DIDFLAG.
038424,000143: 21,2334           74736                           MASK     DIDFLBIT                              
038425,000144: 21,2335           00006                           EXTEND                                         
038426,000145: 21,2336           12374                           BZF      SPEEDRUN                              #  SET.  PERFORM DATA DISPLAY SEQUENCE.
038427,000146: 21,2337           40075                           CS       FLAGWRD1                              #  RESET.  PERFORM INITIALIZATION FUNCTIONS.
038428,000147: 21,2340           74736                           MASK     DIDFLBIT                              
038429,000148: 21,2341           26075                           ADS      FLAGWRD1                              #  SET DIDFLAG.
038430,000149: 21,2342           44745                           CS       BIT7                                  
038431,000150: 21,2343           71303                           MASK     IMODES33                              #  TO DISPLAY ALTRATE FIRST AND ALT. SECOND
038432,000151: 21,2344           55303                           TS       IMODES33                              
038433,000152: 21,2345           40074                           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038434,000153: 21,2346           74752                           MASK     R10FLBIT                              
038435,000154: 21,2347           00006                           EXTEND                                         
038436,000155: 21,2350           15261                           BZF      TASKOVER                              #  NO
038437,000156: 21,2351           34744                           CAF      BIT8                                  #  YES.
038438,000157: 21,2352           00006                           EXTEND                                         
038439,000158: 21,2353           05012                           WOR      CHAN12                                #  SET DISPLAY INERTIAL DATA OUTBIT.
038440,000159: 21,2354           34755                           CAF      ZERO                                  
038441,000160: 21,2355           55702                           TS       TRAKLATV                              #  LATERAL VELOCITY MONITOR FLAG
038442,000161: 21,2356           55703                           TS       TRAKFWDV                              #  FORWARD VELOCITY MONITOR FLAG
038443,000162: 21,2357           55676                           TS       LATVMETR                              #  LATVEL MONITOR METER
038444,000163: 21,2360           55677                           TS       FORVMETR                              #  FORVEL MONITOR METER
038445,000164: 21,2361           34750                           CAF      BIT4                                  
038446,000165: 21,2362           05173                           TC       TWIDDLE                               
038447,000166: 21,2363           02365                           ADRES    INTLZE                                
038448,000167: 21,2364           15261                           TCF      TASKOVER                              
038449,000168: 21,2365           34752        INTLZE             CAF      BIT2                                  
038450,000169: 21,2366           00006                           EXTEND                                         
038451,000170: 21,2367           05012                           WOR      CHAN12                                #  ENABLE RR ERROR COUNTER.

Page 901

038453,000172: 21,2370           41303                           CS       IMODES33                              
038454,000173: 21,2371           74744                           MASK     BIT8                                  
038455,000174: 21,2372           27303                           ADS      IMODES33                              #  SET INERTIAL DATA FLAG.
038456,000175: 21,2373           15261                           TCF      TASKOVER                              
038457,000176: 
038458,000177: 21,2374           41235        SPEEDRUN           CS       PIPTIME    +1                         #  UPDATE THE VELOCITY VECTOR
038459,000178: 21,2375           60025                           AD       TIME1                                 #  COMPUTE T - TN
038460,000179: 21,2376           64736                           AD       HALF                                  #  CORRECT FOR POSSIBLE OVERFLOW OF TIME1.
038461,000180: 21,2377           64736                           AD       HALF                                  
038462,000181: 21,2400           57715                           XCH      DT                                    #  SAVE FOR LATER USE
038463,000182: 21,2401           34777                           CA       1SEC                                  
038464,000183: 21,2402           54065                           TS       ITEMP5                                #  INITIALIZE FOR DIVISION LATER
038465,000184: 21,2403           00006                           EXTEND                                         
038466,000185: 21,2404           31237                           DCA      GDT/2                                 #  COMPUTE THE X-COMPONENT OF VELOCITY.
038467,000186: 21,2405           20001                           DDOUBL                                         
038468,000187: 21,2406           20001                           DDOUBL                                         
038469,000188: 21,2407           00006                           EXTEND                                         
038470,000189: 21,2410           71715                           MP       DT                                    
038471,000190: 21,2411           00006                           EXTEND                                         
038472,000191: 21,2412           10065                           DV       ITEMP5                                
038473,000192: 21,2413           57706                           XCH      VVECT                                 #  VVECT = G(T-TN) M/CS *2(-5)
038474,000193: 21,2414           00006                           EXTEND                                         
038475,000194: 21,2415           31527                           DCA      V                                     #  M/CS *2(-7)
038476,000195: 21,2416           20001                           DDOUBL                                         #  RESCALE TO 2(-5)
038477,000196: 21,2417           20001                           DDOUBL                                         
038478,000197: 21,2420           27706                           ADS      VVECT                                 #  VVECT = VN + G(T-TN) M/CS *2(-5)
038479,000198: 21,2421           30037                           CA       PIPAX                                 #  DELV CM/SEC *2(-14)
038480,000199: 21,2422           61160                           AD       PIPATMPX                              #  IN CASE PIPAX HAS BEEN ZEROED
038481,000200: 21,2423           00006                           EXTEND                                         
038482,000201: 21,2424           72004                           MP       KPIP1(5)                              #  DELV M/CS *2(-5)
038483,000202: 21,2425           27706                           ADS      VVECT                                 #  VVECT = VN + DELV + GN(T-TN) M/CS *2(-5)
038484,000203: 21,2426           00006                           EXTEND                                         
038485,000204: 21,2427           31241                           DCA      GDT/2      +2                         #  COMPUTE THE Y-COMPONENT OF VELOCITY.
038486,000205: 21,2430           20001                           DDOUBL                                         
038487,000206: 21,2431           20001                           DDOUBL                                         
038488,000207: 21,2432           00006                           EXTEND                                         
038489,000208: 21,2433           71715                           MP       DT                                    
038490,000209: 21,2434           00006                           EXTEND                                         
038491,000210: 21,2435           10065                           DV       ITEMP5                                
038492,000211: 21,2436           57707                           XCH      VVECT      +1                         
038493,000212: 21,2437           00006                           EXTEND                                         
038494,000213: 21,2440           31531                           DCA      V          +2                         
038495,000214: 21,2441           20001                           DDOUBL                                         
038496,000215: 21,2442           20001                           DDOUBL                                         
038497,000216: 21,2443           27707                           ADS      VVECT      +1                         
038498,000217: 21,2444           30040                           CA       PIPAY                                 
038499,000218: 21,2445           61161                           AD       PIPATMPY                              
038500,000219: 21,2446           00006                           EXTEND                                         
038501,000220: 21,2447           72004                           MP       KPIP1(5)                              
038502,000221: 21,2450           27707                           ADS      VVECT      +1                         

Page 902

038504,000223: 21,2451           00006                           EXTEND                                         
038505,000224: 21,2452           31243                           DCA      GDT/2      +4                         #  COMPUTE THE Z-COMPONENT OF VELOCITY.
038506,000225: 21,2453           20001                           DDOUBL                                         
038507,000226: 21,2454           20001                           DDOUBL                                         
038508,000227: 21,2455           00006                           EXTEND                                         
038509,000228: 21,2456           71715                           MP       DT                                    
038510,000229: 21,2457           00006                           EXTEND                                         
038511,000230: 21,2460           10065                           DV       ITEMP5                                
038512,000231: 21,2461           57710                           XCH      VVECT      +2                         
038513,000232: 21,2462           00006                           EXTEND                                         
038514,000233: 21,2463           31533                           DCA      V          +4                         
038515,000234: 21,2464           20001                           DDOUBL                                         
038516,000235: 21,2465           20001                           DDOUBL                                         
038517,000236: 21,2466           27710                           ADS      VVECT      +2                         
038518,000237: 21,2467           30041                           CA       PIPAZ                                 
038519,000238: 21,2470           61162                           AD       PIPATMPZ                              
038520,000239: 21,2471           00006                           EXTEND                                         
038521,000240: 21,2472           72004                           MP       KPIP1(5)                              
038522,000241: 21,2473           27710                           ADS      VVECT      +2                         
038523,000242: 
038524,000243: 21,2474           34751                           CAF      BIT3                                  #  PAUSE 40 MS TO LET OTHER RUPTS IN.
038525,000244: 21,2475           05224                           TC       VARDELAY                              
038526,000245: 
038527,000246: 21,2476           40074                           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038528,000247: 21,2477           74752                           MASK     R10FLBIT                              
038529,000248: 21,2500           10000                           CCS      A                                     
038530,000249: 21,2501           12503                           TCF      +2                                    #  YES.
038531,000250: 21,2502           01714                           TC       LADQSAVE                              #  NO.
038532,000251: 
038533,000252: 21,2503           31733                           CA       DELVS                                 #  HI X OF VELOCITY CORRECTION TERM.
038534,000253: 21,2504           61706                           AD       VVECT                                 #  HI X OF UPDATED VELOCITY VECTOR.
038535,000254: 21,2505           54061                           TS       ITEMP1                                #  = VX - DVX M/CS *2(-5).
038536,000255: 21,2506           31735                           CA       DELVS      +2                         #     Y
038537,000256: 21,2507           61707                           AD       VVECT      +1                         #     Y
038538,000257: 21,2510           54062                           TS       ITEMP2                                #  = VY - DVY M/CS *2(-5).
038539,000258: 21,2511           31737                           CA       DELVS      +4                         #     Z
038540,000259: 21,2512           61710                           AD       VVECT      +2                         #     Z
038541,000260: 21,2513           54063                           TS       ITEMP3                                #  = VZ - DVZ M/CS *2(-5).
038542,000261: 21,2514           30061                           CA       ITEMP1                                #  COMPUTE VHY, VELOCITY DIRECTED ALONG THE
038543,000262: 21,2515           00006                           EXTEND                                         #  Y-COORDINATE.
038544,000263: 21,2516           71717                           MP       UHYP                                  #  HI X OF CROSS-RANGE HALF-UNIT VECTOR.
038545,000264: 21,2517           56070                           XCH      RUPTREG1                              
038546,000265: 21,2520           30062                           CA       ITEMP2                                
038547,000266: 21,2521           00006                           EXTEND                                         
038548,000267: 21,2522           71721                           MP       UHYP       +2                         #  Y
038549,000268: 21,2523           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038550,000269: 21,2524           30063                           CA       ITEMP3                                
038551,000270: 21,2525           00006                           EXTEND                                         
038552,000271: 21,2526           71723                           MP       UHYP       +4                         #  Z
038553,000272: 21,2527           26070                           ADS      RUPTREG1                              

Page 903

038555,000274: 21,2530           30070                           CA       RUPTREG1                              
038556,000275: 21,2531           60000                           DOUBLE                                         
038557,000276: 21,2532           57704                           XCH      VHY                                   #  VHY=VMP.UHYP M/CS*2(-5).
038558,000277: 21,2533           30061                           CA       ITEMP1                                #  NOW COMPUTE VHZ, VELOCITY DIRECTED ALONG
038559,000278: 21,2534           00006                           EXTEND                                         #  THE Z-COORDINATE.
038560,000279: 21,2535           71725                           MP       UHZP                                  #  HI X OF DOWN-RANGE HALF-UNIT VECTOR.
038561,000280: 21,2536           56070                           XCH      RUPTREG1                              
038562,000281: 21,2537           30062                           CA       ITEMP2                                
038563,000282: 21,2540           00006                           EXTEND                                         
038564,000283: 21,2541           71727                           MP       UHZP       +2                         #  Y
038565,000284: 21,2542           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038566,000285: 21,2543           30063                           CA       ITEMP3                                
038567,000286: 21,2544           00006                           EXTEND                                         
038568,000287: 21,2545           71731                           MP       UHZP       +4                         #  Z
038569,000288: 21,2546           26070                           ADS      RUPTREG1                              
038570,000289: 21,2547           30070                           CA       RUPTREG1                              
038571,000290: 21,2550           60000                           DOUBLE                                         
038572,000291: 21,2551           57705                           XCH      VHZ                                   #  VHZ = VMP.UHZP M/CS*2(-5).
038573,000292: 21,2552           35015        GET22/32           CAF      EBANK6                                #  GET SIN(AOG),COS(AOG) FROM GPMATRIX.
038574,000293: 21,2553           54003                           TS       EBANK                                 
038575,000294: 21,2554  E6,1417                                  EBANK=   M22                                   
038576,000295: 21,2554           31417                           CA       M22                                   
038577,000296: 21,2555           54063                           TS       ITEMP3                                
038578,000297: 21,2556           31420                           CA       M32                                   
038579,000298: 21,2557           54064                           TS       ITEMP4                                
038580,000299: 21,2560           35016                           CAF      EBANK7                                
038581,000300: 21,2561           54003                           TS       EBANK                                 
038582,000301: 21,2562  E7,1536                                  EBANK=   UNIT/R/                               
038583,000302: 21,2562           30064        LATFWDV            CA       ITEMP4                                #  COMPUTE LATERAL AND FORWARD VELOCITIES.
038584,000303: 21,2563           00006                           EXTEND                                         
038585,000304: 21,2564           71704                           MP       VHY                                   
038586,000305: 21,2565           56070                           XCH      RUPTREG1                              
038587,000306: 21,2566           30063                           CA       ITEMP3                                
038588,000307: 21,2567           00006                           EXTEND                                         
038589,000308: 21,2570           71705                           MP       VHZ                                   
038590,000309: 21,2571           26070                           ADS      RUPTREG1                              #  = VHY(COS)AOG+VHZ(SIN)AOG M/CS *2(-5)
038591,000310: 21,2572           32003                           CA       VELCONV                               #  CONVERT LATERAL VELOCITY TO BIT UNITS.
038592,000311: 21,2573           00006                           EXTEND                                         
038593,000312: 21,2574           70070                           MP       RUPTREG1                              
038594,000313: 21,2575           20001                           DDOUBL                                         
038595,000314: 21,2576           57700                           XCH      LATVEL                                #  LATERAL VELOCITY IN BIT UNITS *2(-14).
038596,000315: 21,2577           30064                           CA       ITEMP4                                #  COMPUTE FORWARD VELOCITY.
038597,000316: 21,2600           00006                           EXTEND                                         
038598,000317: 21,2601           71705                           MP       VHZ                                   
038599,000318: 21,2602           56070                           XCH      RUPTREG1                              
038600,000319: 21,2603           30063                           CA       ITEMP3                                
038601,000320: 21,2604           00006                           EXTEND                                         
038602,000321: 21,2605           71704                           MP       VHY                                   
038603,000322: 21,2606           40000                           CS       A                                     
038604,000323: 21,2607           26070                           ADS      RUPTREG1                              #  =VHZ(COS)AOG-VHY(SIN)AOG M/CS *2(-5).

Page 904

038606,000325: 21,2610           32003                           CA       VELCONV                               #  CONVERT FORWARD VELOCITY TO BIT UNITS.
038607,000326: 21,2611           00006                           EXTEND                                         
038608,000327: 21,2612           70070                           MP       RUPTREG1                              
038609,000328: 21,2613           20001                           DDOUBL                                         
038610,000329: 21,2614           57701                           XCH      FORVEL                                #  FORWARD VELOCITY IN BIT UNITS *2(-14).
038611,000330: 
038612,000331: 21,2615           42005                           CS       MAXVBITS                              #  ACC.=-199.9989 FT./SEC.
038613,000332: 21,2616           54066                           TS       ITEMP6                                #  -547 BIT UNITS (OCTAL) AT 0.5571 FPS/BIT
038614,000333: 
038615,000334: 21,2617           34753                           CAF      ONE                                   #  LOOP TWICE.
038616,000335: 21,2620           54065        VMONITOR           TS       ITEMP5                                #  FORWARD AND LATERAL VELOCITY LANDING
038617,000336: 21,2621           50065                           INDEX    ITEMP5                                #        ANALOG DISPLAYS MONITOR.
038618,000337: 21,2622           11700                           CCS      LATVEL                                
038619,000338: 21,2623           12627                           TCF      +4                                    
038620,000339: 21,2624           12730                           TCF      LVLIMITS                              
038621,000340: 21,2625           12635                           TCF      +8D                                   
038622,000341: 21,2626           12730                           TCF      LVLIMITS                              
038623,000342: 21,2627           50065                           INDEX    ITEMP5                                
038624,000343: 21,2630           41700                           CS       LATVEL                                
038625,000344: 21,2631           62005                           AD       MAXVBITS                              #  +199.9989 FT./SEC.
038626,000345: 21,2632           00006                           EXTEND                                         
038627,000346: 21,2633           62643                           BZMF     CHKLASTY                              
038628,000347: 21,2634           12730                           TCF      LVLIMITS                              
038629,000348: 21,2635           50065                           INDEX    ITEMP5                                
038630,000349: 21,2636           31700                           CA       LATVEL                                
038631,000350: 21,2637           62005                           AD       MAXVBITS                              
038632,000351: 21,2640           00006                           EXTEND                                         
038633,000352: 21,2641           62643                           BZMF     +2                                    
038634,000353: 21,2642           12730                           TCF      LVLIMITS                              
038635,000354: 21,2643           50065        CHKLASTY           INDEX    ITEMP5                                
038636,000355: 21,2644           11676                           CCS      LATVMETR                              
038637,000356: 21,2645           12651                           TCF      +4                                    
038638,000357: 21,2646           12662                           TCF      LASTOK                                
038639,000358: 21,2647           12656                           TCF      +7                                    
038640,000359: 21,2650           12662                           TCF      LASTOK                                
038641,000360: 21,2651           50065                           INDEX    ITEMP5                                
038642,000361: 21,2652           31700                           CA       LATVEL                                
038643,000362: 21,2653           00006                           EXTEND                                         
038644,000363: 21,2654           62701                           BZMF     LASTPOSY   +5                         
038645,000364: 21,2655           12662                           TCF      +5                                    
038646,000365: 21,2656           50065                           INDEX    ITEMP5                                
038647,000366: 21,2657           41700                           CS       LATVEL                                
038648,000367: 21,2660           00006                           EXTEND                                         
038649,000368: 21,2661           62716                           BZMF     LASTNEGY   +4                         
038650,000369: 21,2662           50065        LASTOK             INDEX    ITEMP5                                
038651,000370: 21,2663           11702                           CCS      TRAKLATV                              
038652,000371: 21,2664           12674                           TCF      LASTPOSY                              
038653,000372: 21,2665           12667                           TCF      +2                                    
038654,000373: 21,2666           12712                           TCF      LASTNEGY                              
038655,000374: 21,2667           50065                           INDEX    ITEMP5                                

Page 905

038657,000376: 21,2670           31700                           CA       LATVEL                                
038658,000377: 21,2671           00006                           EXTEND                                         
038659,000378: 21,2672           62720                           BZMF     NEGVMAXY                              
038660,000379: 21,2673           12703                           TCF      POSVMAXY                              
038661,000380: 21,2674           50065        LASTPOSY           INDEX    ITEMP5                                
038662,000381: 21,2675           31700                           CA       LATVEL                                
038663,000382: 21,2676           00006                           EXTEND                                         
038664,000383: 21,2677           62701                           BZMF     +2                                    
038665,000384: 21,2700           12703                           TCF      POSVMAXY                              
038666,000385: 21,2701           42005                           CS       MAXVBITS                              
038667,000386: 21,2702           13024                           TCF      ZEROLSTY                              
038668,000387: 21,2703           50065        POSVMAXY           INDEX    ITEMP5                                
038669,000388: 21,2704           41676                           CS       LATVMETR                              
038670,000389: 21,2705           62005                           AD       MAXVBITS                              
038671,000390: 21,2706           50065                           INDEX    ITEMP5                                
038672,000391: 21,2707           56072                           XCH      RUPTREG3                              
038673,000392: 21,2710           34753                           CAF      ONE                                   
038674,000393: 21,2711           13027                           TCF      ZEROLSTY   +3                         
038675,000394: 21,2712           50065        LASTNEGY           INDEX    ITEMP5                                
038676,000395: 21,2713           31700                           CA       LATVEL                                
038677,000396: 21,2714           00006                           EXTEND                                         
038678,000397: 21,2715           62720                           BZMF     NEGVMAXY                              
038679,000398: 21,2716           32005                           CA       MAXVBITS                              
038680,000399: 21,2717           13024                           TCF      ZEROLSTY                              
038681,000400: 21,2720           50065        NEGVMAXY           INDEX    ITEMP5                                
038682,000401: 21,2721           31676                           CA       LATVMETR                              
038683,000402: 21,2722           62005                           AD       MAXVBITS                              
038684,000403: 21,2723           40000                           COM                                            
038685,000404: 21,2724           50065                           INDEX    ITEMP5                                
038686,000405: 21,2725           56072                           XCH      RUPTREG3                              
038687,000406: 21,2726           44753                           CS       ONE                                   
038688,000407: 21,2727           13027                           TCF      ZEROLSTY   +3                         
038689,000408: 21,2730           50065        LVLIMITS           INDEX    ITEMP5                                
038690,000409: 21,2731           11702                           CCS      TRAKLATV                              
038691,000410: 21,2732           12761                           TCF      LATVPOS                               
038692,000411: 21,2733           12735                           TCF      +2                                    
038693,000412: 21,2734           12766                           TCF      LATVNEG                               
038694,000413: 21,2735           50065                           INDEX    ITEMP5                                
038695,000414: 21,2736           41676                           CS       LATVMETR                              
038696,000415: 21,2737           00006                           EXTEND                                         
038697,000416: 21,2740           62742                           BZMF     +2                                    
038698,000417: 21,2741           12775                           TCF      NEGLMLV                               
038699,000418: 21,2742           50065                           INDEX    ITEMP5                                
038700,000419: 
038701,000420: 21,2743           41700                           CS       LATVEL                                
038702,000421: 21,2744           00006                           EXTEND                                         
038703,000422: 21,2745           63020                           BZMF     LVMINLM                               
038704,000423: 21,2746           60066                           AD       ITEMP6                                
038705,000424: 21,2747           50065                           INDEX    ITEMP5                                
038706,000425: 21,2750           61676                           AD       LATVMETR                              
038707,000426: 21,2751           00006                           EXTEND                                         

Page 906

038709,000428: 21,2752           63020                           BZMF     LVMINLM                               
038710,000429: 21,2753           50065                           INDEX    ITEMP5                                
038711,000430: 21,2754           61700                           AD       LATVEL                                
038712,000431: 21,2755           00006                           EXTEND                                         
038713,000432: 21,2756           50065                           INDEX    ITEMP5                                
038714,000433: 21,2757           61676                           SU       LATVMETR                              
038715,000434: 21,2760           13024                           TCF      ZEROLSTY                              
038716,000435: 21,2761           50065        LATVPOS            INDEX    ITEMP5                                
038717,000436: 21,2762           41700                           CS       LATVEL                                
038718,000437: 21,2763           00006                           EXTEND                                         
038719,000438: 21,2764           63020                           BZMF     LVMINLM                               
038720,000439: 21,2765           12772                           TCF      +5                                    
038721,000440: 21,2766           50065        LATVNEG            INDEX    ITEMP5                                
038722,000441: 21,2767           31700                           CA       LATVEL                                
038723,000442: 21,2770           00006                           EXTEND                                         
038724,000443: 21,2771           63020                           BZMF     LVMINLM                               
038725,000444: 21,2772           50065                           INDEX    ITEMP5                                
038726,000445: 21,2773           41676                           CS       LATVMETR                              
038727,000446: 21,2774           13024                           TCF      ZEROLSTY                              
038728,000447: 21,2775           50065        NEGLMLV            INDEX    ITEMP5                                
038729,000448: 21,2776           31700                           CA       LATVEL                                
038730,000449: 21,2777           00006                           EXTEND                                         
038731,000450: 21,3000           63020                           BZMF     LVMINLM                               
038732,000451: 21,3001           32005                           CA       MAXVBITS                              
038733,000452: 21,3002           50065                           INDEX    ITEMP5                                
038734,000453: 21,3003           61676                           AD       LATVMETR                              
038735,000454: 21,3004           40000                           COM                                            
038736,000455: 21,3005           50065                           INDEX    ITEMP5                                
038737,000456: 21,3006           61700                           AD       LATVEL                                
038738,000457: 21,3007           00006                           EXTEND                                         
038739,000458: 21,3010           63020                           BZMF     LVMINLM                               
038740,000459: 21,3011           00006                           EXTEND                                         
038741,000460: 21,3012           50065                           INDEX    ITEMP5                                
038742,000461: 21,3013           61700                           SU       LATVEL                                
038743,000462: 21,3014           50065                           INDEX    ITEMP5                                
038744,000463: 21,3015           61676                           AD       LATVMETR                              
038745,000464: 21,3016           40000                           COM                                            
038746,000465: 21,3017           13024                           TCF      ZEROLSTY                              
038747,000466: 21,3020           50065        LVMINLM            INDEX    ITEMP5                                
038748,000467: 21,3021           41676                           CS       LATVMETR                              
038749,000468: 21,3022           50065                           INDEX    ITEMP5                                
038750,000469: 21,3023           61700                           AD       LATVEL                                
038751,000470: 21,3024           50065        ZEROLSTY           INDEX    ITEMP5                                
038752,000471: 21,3025           56072                           XCH      RUPTREG3                              
038753,000472: 21,3026           34755                           CAF      ZERO                                  
038754,000473: 21,3027           50065                           INDEX    ITEMP5                                
038755,000474: 21,3030           55702                           TS       TRAKLATV                              
038756,000475: 21,3031           50065                           INDEX    ITEMP5                                
038757,000476: 21,3032           30072                           CA       RUPTREG3                              
038758,000477: 21,3033           64754                           AD       NEG0                                  #  AVOIDS +0 DINC HARDWARE MALFUNCTION

Page 907

038760,000479: 21,3034           50065                           INDEX    ITEMP5                                
038761,000480: 21,3035           54053                           TS       CDUTCMD                               
038762,000481: 21,3036           50065                           INDEX    ITEMP5                                
038763,000482: 21,3037           30072                           CA       RUPTREG3                              
038764,000483: 21,3040           50065                           INDEX    ITEMP5                                
038765,000484: 21,3041           27676                           ADS      LATVMETR                              
038766,000485: 21,3042           10065                           CCS      ITEMP5                                #  FIRST MONITOR FORWARD THEN LATERAL VEL.
038767,000486: 21,3043           12620                           TCF      VMONITOR                              
038768,000487: 
038769,000488: 21,3044           35020                           CAF      BITSET                                #  DRIVE THE X-POINTER DISPLAY.
038770,000489: 21,3045           00006                           EXTEND                                         
038771,000490: 21,3046           05014                           WOR      CHAN14                                
038772,000491: 21,3047           01714                           TC       LADQSAVE                              #  GO TO ALTROUT +1 OR TO ALTOUT +1
038773,000492: 21,3050           34755        ZERODATA           CAF      ZERO                                  #  ZERO ALTSAVE AND ALTSAVE +1 - - -
038774,000493: 21,3051           54001                           TS       L                                     #        NO NEGATIVE ALTITUDES ALLOWED.
038775,000494: 21,3052           12270                           TCF      ZDATA2                                
038776,000495: 
038777,000496:                                                                                                  #  ************************************************************************
038778,000497: 
038779,000498: 21,3053           40074        DISPRSET           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038780,000499: 21,3054           74752                           MASK     R10FLBIT                              
038781,000500: 21,3055           00006                           EXTEND                                         
038782,000501: 21,3056           13067                           BZF      ABORTON                               #  NO.
038783,000502: 21,3057           34744                           CAF      BIT8                                  #  YES.
038784,000503: 21,3060           71303                           MASK     IMODES33                              #  CHECK IF INERTIAL DATA JUST DISPLAYED.
038785,000504: 21,3061           10000                           CCS      A                                     
038786,000505: 21,3062           34752                           CAF      BIT2                                  #  YES. DISABLE RR ERROR COUNTER
038787,000506: 21,3063           64744                           AD       BIT8                                  #  NO.  REMOVE DISPLAY INERTIAL DATA
038788,000507: 21,3064           40000                           COM                                            
038789,000508: 21,3065           00006                           EXTEND                                         
038790,000509: 21,3066           03012                           WAND     CHAN12                                
038791,000510: 21,3067           43076        ABORTON            CS       BITS8/7                               #  RESET INERTIAL DATA, INTERLEAVE FLAGS.
038792,000511: 21,3070           71303                           MASK     IMODES33                              
038793,000512: 21,3071           55303                           TS       IMODES33                              
038794,000513: 21,3072           44736                           CS       DIDFLBIT                              
038795,000514: 21,3073           70075                           MASK     FLAGWRD1                              
038796,000515: 21,3074           54075                           TS       FLAGWRD1                              #  RESET DIDFLAG.
038797,000516: 21,3075           15261                           TCF      TASKOVER                              
038798,000517: 
038799,000518:                                                                                                  #  ************************************************************************
038800,000519: 
038801,000520: 21,3076           00300        BITS8/7            OCT      00300                                 #  INERTIAL DATA AND INTERLEAVE FLAGS.
038802,000521: 21,3077     5020               BITSET             =        PRIO6                                 
038803,000522: 
038804,000523:                                                                                                  #  ************************************************************************
038805,000524: 
038806,000525: 

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