Source Code

These source-code files are part of a reconstructed copy of Luminary 96, the original release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer (AGC) software.

The reconstruction began with reconstructed source code for Luminary 97. Changes between revisions 96 and 97 were backed out, as described by anomal report LNY-59. transcribed from a digitized copy of that program. The reconstruction was verified by matching memory-bank checksums to those listed in drawing 2021152D. 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 96 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.

038374,000002:                                                                                                  ## Copyright:   Public domain.
038375,000003:                                                                                                  ## Filename:    LANDING_ANALOG_DISPLAYS.agc
038376,000004:                                                                                                  ## Purpose:     A section of Luminary revision 96.
038377,000005:                                                                                                  ##              It is part of the reconstructed source code for the
038378,000006:                                                                                                  ##              original release of the flight software for the Lunar 
038379,000007:                                                                                                  ##              Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
038380,000008:                                                                                                  ##              The code has been recreated from a previously reconstructed
038381,000009:                                                                                                  ##              copy of Luminary 97 by undoing changes described in anomaly
038382,000010:                                                                                                  ##              report LNY-59. The code has been adapted such that the
038383,000011:                                                                                                  ##              resulting bugger words exactly match those specified for
038384,000012:                                                                                                  ##              Luminary 96 in NASA drawing 2021152D, which gives relatively
038385,000013:                                                                                                  ##              high confidence that the reconstruction is correct.
038386,000014:                                                                                                  ## Reference:   pp. 898-907
038387,000015:                                                                                                  ## Assembler:   yaYUL
038388,000016:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
038389,000017:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
038390,000018:                                                                                                  ## Mod history: 2019-08-04 MAS  Created from Luminary 97.
038391,000019: 

Page 898

038393,000021: 21,2154                                           BANK     21                                    
038394,000022: 21,2000                                           SETLOC   R10                                   
038395,000023: 21,2000                                           BANK                                           
038396,000024: 
038397,000025: 21,2154  E7,1536                                  EBANK=   UNIT/R/                               
038398,000026: 21,2154                                           COUNT*   $$/R10                                
038399,000027: 
038400,000028: 21,2154           23714        LANDISP            LXCH     PIPCTR1                               #  UPDATE TBASE2 AND PIPCTR SIMULTANEOUSLY.
038401,000029: 21,2155           40025                           CS       TIME1                                 
038402,000030: 21,2156           53056                           DXCH     TBASE2                                
038403,000031: 
038404,000032: 21,2157           40103                           CS       FLAGWRD7                              #  IS LANDING ANALOG DISPLAYS FLAG SET?
038405,000033: 21,2160           74741                           MASK     SWANDBIT                              
038406,000034: 21,2161           10000                           CCS      A                                     
038407,000035: 21,2162           13053                           TCF      DISPRSET                              #  NO.
038408,000036: 21,2163           31303                           CA       IMODES33                              #  BIT 7 = 0 (DO ALTRATE), =1 (DO ALT.)
038409,000037: 21,2164           74745                           MASK     BIT7                                  
038410,000038: 21,2165           10000                           CCS      A                                     
038411,000039: 21,2166           12240                           TCF      ALTOUT                                
038412,000040: 21,2167           02324        ALTROUT            TC       DISINDAT                              #  CHECK MODE SELECT SWITCH AND DIDFLG.
038413,000041: 21,2170           41303                           CS       IMODES33                              
038414,000042: 21,2171           74745                           MASK     BIT7                                  
038415,000043: 21,2172           27303                           ADS      IMODES33                              #  ALTERNATE ALTITUDE RATE WITH ALTITUDE.
038416,000044: 21,2173           34752                           CAF      BIT2                                  #  RATE COMMAND IS EXECUTED BEFORE RANGE.
038417,000045: 21,2174           00006                           EXTEND                                         
038418,000046: 21,2175           05014                           WOR      CHAN14                                #  ALTRATE (BIT2 = 1), ALTITUDE (BIT2 = 0).
038419,000047: 21,2176           31743        ARCOMP             CA       RUNIT                                 #  COMPUTE ALTRATE = RUNIT.VVECT M/CS *2(-6).
038420,000048: 21,2177           00006                           EXTEND                                         
038421,000049: 21,2200           71706                           MP       VVECT                                 #  MULTIPLY X-COMPONENTS.
038422,000050: 21,2201           56070                           XCH      RUPTREG1                              #  SAVE SINGLE PRECISION RESULT M/CS*2(-6).
038423,000051: 21,2202           31744                           CA       RUNIT      +1                         #  MULTIPLY Y-COMPONENTS.
038424,000052: 21,2203           00006                           EXTEND                                         
038425,000053: 21,2204           71707                           MP       VVECT      +1                         
038426,000054: 21,2205           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038427,000055: 21,2206           31745                           CA       RUNIT      +2                         #  MULTIPLY Z-COMPONENTS.
038428,000056: 21,2207           00006                           EXTEND                                         
038429,000057: 21,2210           71710                           MP       VVECT      +2                         
038430,000058: 21,2211           26070                           ADS      RUPTREG1                              #  ALTITUDE RATE IN M/CS *2(-6).
038431,000059: 21,2212           32000                           CA       ARCONV                                #  CONVERT ALTRATE TO BIT UNITS (.5FPS/BIT)
038432,000060: 21,2213           00006                           EXTEND                                         
038433,000061: 21,2214           70070                           MP       RUPTREG1                              
038434,000062: 21,2215           20001                           DDOUBL                                         
038435,000063: 21,2216           20001                           DDOUBL                                         
038436,000064: 21,2217           56070                           XCH      RUPTREG1                              #  ALTITUDE RATE IN BIT UNITS*2(-14).
038437,000065: 21,2220           31716                           CA       DALTRATE                              #  ALTITUDE RATE COMPENSATION FACTOR.
038438,000066: 21,2221           00006                           EXTEND                                         
038439,000067: 21,2222           71715                           MP       DT                                    
038440,000068: 21,2223           60070                           AD       RUPTREG1                              
038441,000069: 21,2224           55711                           TS       ALTRATE                               #  ALTITUDE RATE IN BIT UNITS*2(-14).
038442,000070: 21,2225           41711                           CS       ALTRATE                               

Page 899

038444,000072: 21,2226           00006                           EXTEND                                         #  CHECK POLARITY OF ALTITUDE RATE.
038445,000073: 21,2227           62231                           BZMF     +2                                    
038446,000074: 21,2230           12233                           TCF      DATAOUT                               #  NEGATIVE - SEND POS. PULSES TO ALTM REG.
038447,000075: 21,2231           31711                           CA       ALTRATE                               #  POSITIVE OR ZERO - SET SIGN BIT = 1 AND
038448,000076: 21,2232           64735                           AD       BIT15                                 #  SEND TO ALTM REGISTER.  *DO NOT SEND +0*
038449,000077: 21,2233           54060        DATAOUT            TS       ALTM                                  #  ACTIVATE THE LANDING ANALOG DISPLAYS - -
038450,000078: 21,2234           34751                           CAF      BIT3                                  
038451,000079: 21,2235           00006                           EXTEND                                         
038452,000080: 21,2236           05014                           WOR      CHAN14                                #  BIT3 DRIVES THE ALT/ALTRATE METER.
038453,000081: 21,2237           15261                           TCF      TASKOVER                              #  EXIT
038454,000082: 
038455,000083: 21,2240           02324        ALTOUT             TC       DISINDAT                              #  CHECK MODE SELECT SWITCH AND DIDFLG.
038456,000084: 21,2241           44745                           CS       BIT7                                  
038457,000085: 21,2242           71303                           MASK     IMODES33                              
038458,000086: 21,2243           55303                           TS       IMODES33                              #  ALTERNATE ALTITUDE RATE WITH ALTITUDE.
038459,000087: 21,2244           44752                           CS       BIT2                                  
038460,000088: 21,2245           00006                           EXTEND                                         
038461,000089: 21,2246           03014                           WAND     CHAN14                                
038462,000090: 21,2247           11741                           CCS      ALTBITS                               #  = -1 IF OLD ALT. DATA TO BE EXTRAPOLATED.
038463,000091: 21,2250           12254                           TCF      +4                                    
038464,000092: 21,2251           12254                           TCF      +3                                    
038465,000093: 21,2252           12272                           TCF      OLDDATA                               
038466,000094: 21,2253           55741                           TS       ALTBITS                               #  SET ALTBITS FROM -0 TO +0.
038467,000095: 21,2254           44753                           CS       ONE                                   
038468,000096: 21,2255           53742                           DXCH     ALTBITS                               #  SET ALTBITS = -1 FOR SWITCH USE NEXT PASS.
038469,000097: 21,2256           53713                           DXCH     ALTSAVE                               
038470,000098: 21,2257           34742                           CA       BIT10                                 #  NEW ALTITUDE EXTRAPOLATION WITH ALTRATE.
038471,000099: 21,2260           56002                           XCH      Q                                     
038472,000100: 21,2261           22007                           LXCH     7                                     #  ZL
038473,000101: 21,2262           31715                           CA       DT                                    
038474,000102: 21,2263           00006                           EXTEND                                         
038475,000103: 21,2264           10002                           DV       Q                                     #  RESCALE DT*2(-14) TO *2(-9) TIME IN CS.
038476,000104: 21,2265           00006                           EXTEND                                         
038477,000105: 21,2266           72002                           MP       ARTOA2                                #  .0021322 *2(+8)
038478,000106: 21,2267           12273                           TCF      OLDDATA    +1                         #  RATE APPLIES FOR DT CS.
038479,000107: 
038480,000108: 21,2270           53713        ZDATA2             DXCH     ALTSAVE                               
038481,000109: 21,2271           12313                           TCF      NEWDATA                               
038482,000110: 21,2272           32001        OLDDATA            CA       ARTOA                                 #  RATE APPLIES FOR .5 SEC. (4X/SEC. CYCLE)
038483,000111: 21,2273           00006                           EXTEND                                         
038484,000112: 21,2274           71711                           MP       ALTRATE                               #  EXTRAPOLATE WITH ALTITUDE RATE.
038485,000113: 21,2275           20001                           DDOUBL                                         
038486,000114: 21,2276           61713                           AD       ALTSAVE    +1                         
038487,000115: 21,2277           55713                           TS       ALTSAVE    +1                         
038488,000116: 21,2300           34755                           CAF      ZERO                                  
038489,000117: 21,2301           27712                           ADS      ALTSAVE                               
038490,000118: 21,2302           34733                           CAF      POSMAX                                #  FORCE SIGN AGREEMENT ASSUMING A
038491,000119: 21,2303           64753                           AD       ONE                                   #  NON-NEGATIVE ALTSAVE.
038492,000120: 21,2304           61713                           AD       ALTSAVE    +1                         #  IF ALTSAVE IS NEGATIVE, ZERO ALTSAVE
038493,000121: 21,2305           55713                           TS       ALTSAVE    +1                         #  AND ALTSAVE +1 AT ZERODATA.

Page 900

038495,000123: 21,2306           34755                           CAF      ZERO                                  
038496,000124: 21,2307           64733                           AD       POSMAX                                
038497,000125: 21,2310           61712                           AD       ALTSAVE                               
038498,000126: 21,2311           55712                           TS       ALTSAVE                               #  POSSIBLY SKIP TO NEWDATA.
038499,000127: 21,2312           13050                           TCF      ZERODATA                              
038500,000128: 21,2313           11713        NEWDATA            CCS      ALTSAVE    +1                         
038501,000129: 21,2314           12320                           TCF      +4                                    
038502,000130: 21,2315           12320                           TCF      +3                                    
038503,000131: 21,2316           34755                           CAF      ZERO                                  #  SET NEGATIVE ALTSAVE +1 TO +0.
038504,000132: 21,2317           55713                           TS       ALTSAVE    +1                         
038505,000133: 21,2320           11712                           CCS      ALTSAVE                               #  PROVIDE A 15 BIT UNSIGNED OUTPUT.
038506,000134: 21,2321           34735                           CAF      BIT15                                 #  THE HI-ORDER PART IS +1 OR +0.
038507,000135: 21,2322           61713                           AD       ALTSAVE    +1                         
038508,000136: 21,2323           12233                           TCF      DATAOUT                               #  DISPATCH UNSIGNED BITS TO ALTM REG.
038509,000137: 21,2324           00006        DISINDAT           EXTEND                                         
038510,000138: 21,2325           23714                           QXCH     LADQSAVE                              #  SAVE RETURN TO ALTROUT +1 OR ALTOUT +1
038511,000139: 21,2326           34746                           CAF      BIT6                                  
038512,000140: 21,2327           00006                           EXTEND                                         #  WISHETH THE ASTRONAUT THE ANALOG
038513,000141: 21,2330           02030                           RAND     CHAN30                                #  DISPLAYS?  I.E.,
038514,000142: 21,2331           10000                           CCS      A                                     #  IS THE MODE SELECT SWITCH IN PGNCS?
038515,000143: 21,2332           13053                           TCF      DISPRSET                              #  NO.  ASTRONAUT REQUESTS NO INERTIAL DATA
038516,000144: 21,2333           40075                           CS       FLAGWRD1                              #  YES.  CHECK STATUS OF DIDFLAG.
038517,000145: 21,2334           74736                           MASK     DIDFLBIT                              
038518,000146: 21,2335           00006                           EXTEND                                         
038519,000147: 21,2336           12374                           BZF      SPEEDRUN                              #  SET.  PERFORM DATA DISPLAY SEQUENCE.
038520,000148: 21,2337           40075                           CS       FLAGWRD1                              #  RESET.  PERFORM INITIALIZATION FUNCTIONS.
038521,000149: 21,2340           74736                           MASK     DIDFLBIT                              
038522,000150: 21,2341           26075                           ADS      FLAGWRD1                              #  SET DIDFLAG.
038523,000151: 21,2342           44745                           CS       BIT7                                  
038524,000152: 21,2343           71303                           MASK     IMODES33                              #  TO DISPLAY ALTRATE FIRST AND ALT. SECOND
038525,000153: 21,2344           55303                           TS       IMODES33                              
038526,000154: 21,2345           40074                           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038527,000155: 21,2346           74752                           MASK     R10FLBIT                              
038528,000156: 21,2347           00006                           EXTEND                                         
038529,000157: 21,2350           15261                           BZF      TASKOVER                              #  NO
038530,000158: 21,2351           34744                           CAF      BIT8                                  #  YES.
038531,000159: 21,2352           00006                           EXTEND                                         
038532,000160: 21,2353           05012                           WOR      CHAN12                                #  SET DISPLAY INERTIAL DATA OUTBIT.
038533,000161: 21,2354           34755                           CAF      ZERO                                  
038534,000162: 21,2355           55702                           TS       TRAKLATV                              #  LATERAL VELOCITY MONITOR FLAG
038535,000163: 21,2356           55703                           TS       TRAKFWDV                              #  FORWARD VELOCITY MONITOR FLAG
038536,000164: 21,2357           55676                           TS       LATVMETR                              #  LATVEL MONITOR METER
038537,000165: 21,2360           55677                           TS       FORVMETR                              #  FORVEL MONITOR METER
038538,000166: 21,2361           34750                           CAF      BIT4                                  
038539,000167: 21,2362           05173                           TC       TWIDDLE                               
038540,000168: 21,2363           02365                           ADRES    INTLZE                                
038541,000169: 21,2364           15261                           TCF      TASKOVER                              
038542,000170: 21,2365           34752        INTLZE             CAF      BIT2                                  
038543,000171: 21,2366           00006                           EXTEND                                         
038544,000172: 21,2367           05012                           WOR      CHAN12                                #  ENABLE RR ERROR COUNTER.

Page 901

038546,000174: 21,2370           41303                           CS       IMODES33                              
038547,000175: 21,2371           74744                           MASK     BIT8                                  
038548,000176: 21,2372           27303                           ADS      IMODES33                              #  SET INERTIAL DATA FLAG.
038549,000177: 21,2373           15261                           TCF      TASKOVER                              
038550,000178: 
038551,000179: 21,2374           41235        SPEEDRUN           CS       PIPTIME    +1                         #  UPDATE THE VELOCITY VECTOR
038552,000180: 21,2375           60025                           AD       TIME1                                 #  COMPUTE T - TN
038553,000181: 21,2376           64736                           AD       HALF                                  #  CORRECT FOR POSSIBLE OVERFLOW OF TIME1.
038554,000182: 21,2377           64736                           AD       HALF                                  
038555,000183: 21,2400           57715                           XCH      DT                                    #  SAVE FOR LATER USE
038556,000184: 21,2401           34777                           CA       1SEC                                  
038557,000185: 21,2402           54065                           TS       ITEMP5                                #  INITIALIZE FOR DIVISION LATER
038558,000186: 21,2403           00006                           EXTEND                                         
038559,000187: 21,2404           31237                           DCA      GDT/2                                 #  COMPUTE THE X-COMPONENT OF VELOCITY.
038560,000188: 21,2405           20001                           DDOUBL                                         
038561,000189: 21,2406           20001                           DDOUBL                                         
038562,000190: 21,2407           00006                           EXTEND                                         
038563,000191: 21,2410           71715                           MP       DT                                    
038564,000192: 21,2411           00006                           EXTEND                                         
038565,000193: 21,2412           10065                           DV       ITEMP5                                
038566,000194: 21,2413           57706                           XCH      VVECT                                 #  VVECT = G(T-TN) M/CS *2(-5)
038567,000195: 21,2414           00006                           EXTEND                                         
038568,000196: 21,2415           31527                           DCA      V                                     #  M/CS *2(-7)
038569,000197: 21,2416           20001                           DDOUBL                                         #  RESCALE TO 2(-5)
038570,000198: 21,2417           20001                           DDOUBL                                         
038571,000199: 21,2420           27706                           ADS      VVECT                                 #  VVECT = VN + G(T-TN) M/CS *2(-5)
038572,000200: 21,2421           30037                           CA       PIPAX                                 #  DELV CM/SEC *2(-14)
038573,000201: 21,2422           61160                           AD       PIPATMPX                              #  IN CASE PIPAX HAS BEEN ZEROED
038574,000202: 21,2423           00006                           EXTEND                                         
038575,000203: 21,2424           72004                           MP       KPIP1(5)                              #  DELV M/CS *2(-5)
038576,000204: 21,2425           27706                           ADS      VVECT                                 #  VVECT = VN + DELV + GN(T-TN) M/CS *2(-5)
038577,000205: 21,2426           00006                           EXTEND                                         
038578,000206: 21,2427           31241                           DCA      GDT/2      +2                         #  COMPUTE THE Y-COMPONENT OF VELOCITY.
038579,000207: 21,2430           20001                           DDOUBL                                         
038580,000208: 21,2431           20001                           DDOUBL                                         
038581,000209: 21,2432           00006                           EXTEND                                         
038582,000210: 21,2433           71715                           MP       DT                                    
038583,000211: 21,2434           00006                           EXTEND                                         
038584,000212: 21,2435           10065                           DV       ITEMP5                                
038585,000213: 21,2436           57707                           XCH      VVECT      +1                         
038586,000214: 21,2437           00006                           EXTEND                                         
038587,000215: 21,2440           31531                           DCA      V          +2                         
038588,000216: 21,2441           20001                           DDOUBL                                         
038589,000217: 21,2442           20001                           DDOUBL                                         
038590,000218: 21,2443           27707                           ADS      VVECT      +1                         
038591,000219: 21,2444           30040                           CA       PIPAY                                 
038592,000220: 21,2445           61161                           AD       PIPATMPY                              
038593,000221: 21,2446           00006                           EXTEND                                         
038594,000222: 21,2447           72004                           MP       KPIP1(5)                              
038595,000223: 21,2450           27707                           ADS      VVECT      +1                         

Page 902

038597,000225: 21,2451           00006                           EXTEND                                         
038598,000226: 21,2452           31243                           DCA      GDT/2      +4                         #  COMPUTE THE Z-COMPONENT OF VELOCITY.
038599,000227: 21,2453           20001                           DDOUBL                                         
038600,000228: 21,2454           20001                           DDOUBL                                         
038601,000229: 21,2455           00006                           EXTEND                                         
038602,000230: 21,2456           71715                           MP       DT                                    
038603,000231: 21,2457           00006                           EXTEND                                         
038604,000232: 21,2460           10065                           DV       ITEMP5                                
038605,000233: 21,2461           57710                           XCH      VVECT      +2                         
038606,000234: 21,2462           00006                           EXTEND                                         
038607,000235: 21,2463           31533                           DCA      V          +4                         
038608,000236: 21,2464           20001                           DDOUBL                                         
038609,000237: 21,2465           20001                           DDOUBL                                         
038610,000238: 21,2466           27710                           ADS      VVECT      +2                         
038611,000239: 21,2467           30041                           CA       PIPAZ                                 
038612,000240: 21,2470           61162                           AD       PIPATMPZ                              
038613,000241: 21,2471           00006                           EXTEND                                         
038614,000242: 21,2472           72004                           MP       KPIP1(5)                              
038615,000243: 21,2473           27710                           ADS      VVECT      +2                         
038616,000244: 
038617,000245: 21,2474           34751                           CAF      BIT3                                  #  PAUSE 40 MS TO LET OTHER RUPTS IN.
038618,000246: 21,2475           05224                           TC       VARDELAY                              
038619,000247: 
038620,000248: 21,2476           40074                           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038621,000249: 21,2477           74752                           MASK     R10FLBIT                              
038622,000250: 21,2500           10000                           CCS      A                                     
038623,000251: 21,2501           12503                           TCF      +2                                    #  YES.
038624,000252: 21,2502           01714                           TC       LADQSAVE                              #  NO.
038625,000253: 
038626,000254: 21,2503           31733                           CA       DELVS                                 #  HI X OF VELOCITY CORRECTION TERM.
038627,000255: 21,2504           61706                           AD       VVECT                                 #  HI X OF UPDATED VELOCITY VECTOR.
038628,000256: 21,2505           54061                           TS       ITEMP1                                #  = VX - DVX M/CS *2(-5).
038629,000257: 21,2506           31735                           CA       DELVS      +2                         #     Y
038630,000258: 21,2507           61707                           AD       VVECT      +1                         #     Y
038631,000259: 21,2510           54062                           TS       ITEMP2                                #  = VY - DVY M/CS *2(-5).
038632,000260: 21,2511           31737                           CA       DELVS      +4                         #     Z
038633,000261: 21,2512           61710                           AD       VVECT      +2                         #     Z
038634,000262: 21,2513           54063                           TS       ITEMP3                                #  = VZ - DVZ M/CS *2(-5).
038635,000263: 21,2514           30061                           CA       ITEMP1                                #  COMPUTE VHY, VELOCITY DIRECTED ALONG THE
038636,000264: 21,2515           00006                           EXTEND                                         #  Y-COORDINATE.
038637,000265: 21,2516           71717                           MP       UHYP                                  #  HI X OF CROSS-RANGE HALF-UNIT VECTOR.
038638,000266: 21,2517           56070                           XCH      RUPTREG1                              
038639,000267: 21,2520           30062                           CA       ITEMP2                                
038640,000268: 21,2521           00006                           EXTEND                                         
038641,000269: 21,2522           71721                           MP       UHYP       +2                         #  Y
038642,000270: 21,2523           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038643,000271: 21,2524           30063                           CA       ITEMP3                                
038644,000272: 21,2525           00006                           EXTEND                                         
038645,000273: 21,2526           71723                           MP       UHYP       +4                         #  Z
038646,000274: 21,2527           26070                           ADS      RUPTREG1                              

Page 903

038648,000276: 21,2530           30070                           CA       RUPTREG1                              
038649,000277: 21,2531           60000                           DOUBLE                                         
038650,000278: 21,2532           57704                           XCH      VHY                                   #  VHY=VMP.UHYP M/CS*2(-5).
038651,000279: 21,2533           30061                           CA       ITEMP1                                #  NOW COMPUTE VHZ, VELOCITY DIRECTED ALONG
038652,000280: 21,2534           00006                           EXTEND                                         #  THE Z-COORDINATE.
038653,000281: 21,2535           71725                           MP       UHZP                                  #  HI X OF DOWN-RANGE HALF-UNIT VECTOR.
038654,000282: 21,2536           56070                           XCH      RUPTREG1                              
038655,000283: 21,2537           30062                           CA       ITEMP2                                
038656,000284: 21,2540           00006                           EXTEND                                         
038657,000285: 21,2541           71727                           MP       UHZP       +2                         #  Y
038658,000286: 21,2542           26070                           ADS      RUPTREG1                              #  ACCUMULATE PARTIAL PRODUCTS.
038659,000287: 21,2543           30063                           CA       ITEMP3                                
038660,000288: 21,2544           00006                           EXTEND                                         
038661,000289: 21,2545           71731                           MP       UHZP       +4                         #  Z
038662,000290: 21,2546           26070                           ADS      RUPTREG1                              
038663,000291: 21,2547           30070                           CA       RUPTREG1                              
038664,000292: 21,2550           60000                           DOUBLE                                         
038665,000293: 21,2551           57705                           XCH      VHZ                                   #  VHZ = VMP.UHZP M/CS*2(-5).
038666,000294: 21,2552           35015        GET22/32           CAF      EBANK6                                #  GET SIN(AOG),COS(AOG) FROM GPMATRIX.
038667,000295: 21,2553           54003                           TS       EBANK                                 
038668,000296: 21,2554  E6,1417                                  EBANK=   M22                                   
038669,000297: 21,2554           31417                           CA       M22                                   
038670,000298: 21,2555           54063                           TS       ITEMP3                                
038671,000299: 21,2556           31420                           CA       M32                                   
038672,000300: 21,2557           54064                           TS       ITEMP4                                
038673,000301: 21,2560           35016                           CAF      EBANK7                                
038674,000302: 21,2561           54003                           TS       EBANK                                 
038675,000303: 21,2562  E7,1536                                  EBANK=   UNIT/R/                               
038676,000304: 21,2562           30064        LATFWDV            CA       ITEMP4                                #  COMPUTE LATERAL AND FORWARD VELOCITIES.
038677,000305: 21,2563           00006                           EXTEND                                         
038678,000306: 21,2564           71704                           MP       VHY                                   
038679,000307: 21,2565           56070                           XCH      RUPTREG1                              
038680,000308: 21,2566           30063                           CA       ITEMP3                                
038681,000309: 21,2567           00006                           EXTEND                                         
038682,000310: 21,2570           71705                           MP       VHZ                                   
038683,000311: 21,2571           26070                           ADS      RUPTREG1                              #  = VHY(COS)AOG+VHZ(SIN)AOG M/CS *2(-5)
038684,000312: 21,2572           32003                           CA       VELCONV                               #  CONVERT LATERAL VELOCITY TO BIT UNITS.
038685,000313: 21,2573           00006                           EXTEND                                         
038686,000314: 21,2574           70070                           MP       RUPTREG1                              
038687,000315: 21,2575           20001                           DDOUBL                                         
038688,000316: 21,2576           57700                           XCH      LATVEL                                #  LATERAL VELOCITY IN BIT UNITS *2(-14).
038689,000317: 21,2577           30064                           CA       ITEMP4                                #  COMPUTE FORWARD VELOCITY.
038690,000318: 21,2600           00006                           EXTEND                                         
038691,000319: 21,2601           71705                           MP       VHZ                                   
038692,000320: 21,2602           56070                           XCH      RUPTREG1                              
038693,000321: 21,2603           30063                           CA       ITEMP3                                
038694,000322: 21,2604           00006                           EXTEND                                         
038695,000323: 21,2605           71704                           MP       VHY                                   
038696,000324: 21,2606           40000                           CS       A                                     
038697,000325: 21,2607           26070                           ADS      RUPTREG1                              #  =VHZ(COS)AOG-VHY(SIN)AOG M/CS *2(-5).

Page 904

038699,000327: 21,2610           32003                           CA       VELCONV                               #  CONVERT FORWARD VELOCITY TO BIT UNITS.
038700,000328: 21,2611           00006                           EXTEND                                         
038701,000329: 21,2612           70070                           MP       RUPTREG1                              
038702,000330: 21,2613           20001                           DDOUBL                                         
038703,000331: 21,2614           57701                           XCH      FORVEL                                #  FORWARD VELOCITY IN BIT UNITS *2(-14).
038704,000332: 
038705,000333: 21,2615           42005                           CS       MAXVBITS                              #  ACC.=-199.9989 FT./SEC.
038706,000334: 21,2616           54066                           TS       ITEMP6                                #  -547 BIT UNITS (OCTAL) AT 0.5571 FPS/BIT
038707,000335: 
038708,000336: 21,2617           34753                           CAF      ONE                                   #  LOOP TWICE.
038709,000337: 21,2620           54065        VMONITOR           TS       ITEMP5                                #  FORWARD AND LATERAL VELOCITY LANDING
038710,000338: 21,2621           50065                           INDEX    ITEMP5                                #        ANALOG DISPLAYS MONITOR.
038711,000339: 21,2622           11700                           CCS      LATVEL                                
038712,000340: 21,2623           12627                           TCF      +4                                    
038713,000341: 21,2624           12730                           TCF      LVLIMITS                              
038714,000342: 21,2625           12635                           TCF      +8D                                   
038715,000343: 21,2626           12730                           TCF      LVLIMITS                              
038716,000344: 21,2627           50065                           INDEX    ITEMP5                                
038717,000345: 21,2630           41700                           CS       LATVEL                                
038718,000346: 21,2631           62005                           AD       MAXVBITS                              #  +199.9989 FT./SEC.
038719,000347: 21,2632           00006                           EXTEND                                         
038720,000348: 21,2633           62643                           BZMF     CHKLASTY                              
038721,000349: 21,2634           12730                           TCF      LVLIMITS                              
038722,000350: 21,2635           50065                           INDEX    ITEMP5                                
038723,000351: 21,2636           31700                           CA       LATVEL                                
038724,000352: 21,2637           62005                           AD       MAXVBITS                              
038725,000353: 21,2640           00006                           EXTEND                                         
038726,000354: 21,2641           62643                           BZMF     +2                                    
038727,000355: 21,2642           12730                           TCF      LVLIMITS                              
038728,000356: 21,2643           50065        CHKLASTY           INDEX    ITEMP5                                
038729,000357: 21,2644           11676                           CCS      LATVMETR                              
038730,000358: 21,2645           12651                           TCF      +4                                    
038731,000359: 21,2646           12662                           TCF      LASTOK                                
038732,000360: 21,2647           12656                           TCF      +7                                    
038733,000361: 21,2650           12662                           TCF      LASTOK                                
038734,000362: 21,2651           50065                           INDEX    ITEMP5                                
038735,000363: 21,2652           31700                           CA       LATVEL                                
038736,000364: 21,2653           00006                           EXTEND                                         
038737,000365: 21,2654           62701                           BZMF     LASTPOSY   +5                         
038738,000366: 21,2655           12662                           TCF      +5                                    
038739,000367: 21,2656           50065                           INDEX    ITEMP5                                
038740,000368: 21,2657           41700                           CS       LATVEL                                
038741,000369: 21,2660           00006                           EXTEND                                         
038742,000370: 21,2661           62716                           BZMF     LASTNEGY   +4                         
038743,000371: 21,2662           50065        LASTOK             INDEX    ITEMP5                                
038744,000372: 21,2663           11702                           CCS      TRAKLATV                              
038745,000373: 21,2664           12674                           TCF      LASTPOSY                              
038746,000374: 21,2665           12667                           TCF      +2                                    
038747,000375: 21,2666           12712                           TCF      LASTNEGY                              
038748,000376: 21,2667           50065                           INDEX    ITEMP5                                

Page 905

038750,000378: 21,2670           31700                           CA       LATVEL                                
038751,000379: 21,2671           00006                           EXTEND                                         
038752,000380: 21,2672           62720                           BZMF     NEGVMAXY                              
038753,000381: 21,2673           12703                           TCF      POSVMAXY                              
038754,000382: 21,2674           50065        LASTPOSY           INDEX    ITEMP5                                
038755,000383: 21,2675           31700                           CA       LATVEL                                
038756,000384: 21,2676           00006                           EXTEND                                         
038757,000385: 21,2677           62701                           BZMF     +2                                    
038758,000386: 21,2700           12703                           TCF      POSVMAXY                              
038759,000387: 21,2701           42005                           CS       MAXVBITS                              
038760,000388: 21,2702           13024                           TCF      ZEROLSTY                              
038761,000389: 21,2703           50065        POSVMAXY           INDEX    ITEMP5                                
038762,000390: 21,2704           41676                           CS       LATVMETR                              
038763,000391: 21,2705           62005                           AD       MAXVBITS                              
038764,000392: 21,2706           50065                           INDEX    ITEMP5                                
038765,000393: 21,2707           56072                           XCH      RUPTREG3                              
038766,000394: 21,2710           34753                           CAF      ONE                                   
038767,000395: 21,2711           13027                           TCF      ZEROLSTY   +3                         
038768,000396: 21,2712           50065        LASTNEGY           INDEX    ITEMP5                                
038769,000397: 21,2713           31700                           CA       LATVEL                                
038770,000398: 21,2714           00006                           EXTEND                                         
038771,000399: 21,2715           62720                           BZMF     NEGVMAXY                              
038772,000400: 21,2716           32005                           CA       MAXVBITS                              
038773,000401: 21,2717           13024                           TCF      ZEROLSTY                              
038774,000402: 21,2720           50065        NEGVMAXY           INDEX    ITEMP5                                
038775,000403: 21,2721           31676                           CA       LATVMETR                              
038776,000404: 21,2722           62005                           AD       MAXVBITS                              
038777,000405: 21,2723           40000                           COM                                            
038778,000406: 21,2724           50065                           INDEX    ITEMP5                                
038779,000407: 21,2725           56072                           XCH      RUPTREG3                              
038780,000408: 21,2726           44753                           CS       ONE                                   
038781,000409: 21,2727           13027                           TCF      ZEROLSTY   +3                         
038782,000410: 21,2730           50065        LVLIMITS           INDEX    ITEMP5                                
038783,000411: 21,2731           11702                           CCS      TRAKLATV                              
038784,000412: 21,2732           12761                           TCF      LATVPOS                               
038785,000413: 21,2733           12735                           TCF      +2                                    
038786,000414: 21,2734           12766                           TCF      LATVNEG                               
038787,000415: 21,2735           50065                           INDEX    ITEMP5                                
038788,000416: 21,2736           41676                           CS       LATVMETR                              
038789,000417: 21,2737           00006                           EXTEND                                         
038790,000418: 21,2740           62742                           BZMF     +2                                    
038791,000419: 21,2741           12775                           TCF      NEGLMLV                               
038792,000420: 21,2742           50065                           INDEX    ITEMP5                                
038793,000421: 
038794,000422: 21,2743           41700                           CS       LATVEL                                
038795,000423: 21,2744           00006                           EXTEND                                         
038796,000424: 21,2745           63020                           BZMF     LVMINLM                               
038797,000425: 21,2746           60066                           AD       ITEMP6                                
038798,000426: 21,2747           50065                           INDEX    ITEMP5                                
038799,000427: 21,2750           61676                           AD       LATVMETR                              
038800,000428: 21,2751           00006                           EXTEND                                         

Page 906

038802,000430: 21,2752           63020                           BZMF     LVMINLM                               
038803,000431: 21,2753           50065                           INDEX    ITEMP5                                
038804,000432: 21,2754           61700                           AD       LATVEL                                
038805,000433: 21,2755           00006                           EXTEND                                         
038806,000434: 21,2756           50065                           INDEX    ITEMP5                                
038807,000435: 21,2757           61676                           SU       LATVMETR                              
038808,000436: 21,2760           13024                           TCF      ZEROLSTY                              
038809,000437: 21,2761           50065        LATVPOS            INDEX    ITEMP5                                
038810,000438: 21,2762           41700                           CS       LATVEL                                
038811,000439: 21,2763           00006                           EXTEND                                         
038812,000440: 21,2764           63020                           BZMF     LVMINLM                               
038813,000441: 21,2765           12772                           TCF      +5                                    
038814,000442: 21,2766           50065        LATVNEG            INDEX    ITEMP5                                
038815,000443: 21,2767           31700                           CA       LATVEL                                
038816,000444: 21,2770           00006                           EXTEND                                         
038817,000445: 21,2771           63020                           BZMF     LVMINLM                               
038818,000446: 21,2772           50065                           INDEX    ITEMP5                                
038819,000447: 21,2773           41676                           CS       LATVMETR                              
038820,000448: 21,2774           13024                           TCF      ZEROLSTY                              
038821,000449: 21,2775           50065        NEGLMLV            INDEX    ITEMP5                                
038822,000450: 21,2776           31700                           CA       LATVEL                                
038823,000451: 21,2777           00006                           EXTEND                                         
038824,000452: 21,3000           63020                           BZMF     LVMINLM                               
038825,000453: 21,3001           32005                           CA       MAXVBITS                              
038826,000454: 21,3002           50065                           INDEX    ITEMP5                                
038827,000455: 21,3003           61676                           AD       LATVMETR                              
038828,000456: 21,3004           40000                           COM                                            
038829,000457: 21,3005           50065                           INDEX    ITEMP5                                
038830,000458: 21,3006           61700                           AD       LATVEL                                
038831,000459: 21,3007           00006                           EXTEND                                         
038832,000460: 21,3010           63020                           BZMF     LVMINLM                               
038833,000461: 21,3011           00006                           EXTEND                                         
038834,000462: 21,3012           50065                           INDEX    ITEMP5                                
038835,000463: 21,3013           61700                           SU       LATVEL                                
038836,000464: 21,3014           50065                           INDEX    ITEMP5                                
038837,000465: 21,3015           61676                           AD       LATVMETR                              
038838,000466: 21,3016           40000                           COM                                            
038839,000467: 21,3017           13024                           TCF      ZEROLSTY                              
038840,000468: 21,3020           50065        LVMINLM            INDEX    ITEMP5                                
038841,000469: 21,3021           41676                           CS       LATVMETR                              
038842,000470: 21,3022           50065                           INDEX    ITEMP5                                
038843,000471: 21,3023           61700                           AD       LATVEL                                
038844,000472: 21,3024           50065        ZEROLSTY           INDEX    ITEMP5                                
038845,000473: 21,3025           56072                           XCH      RUPTREG3                              
038846,000474: 21,3026           34755                           CAF      ZERO                                  
038847,000475: 21,3027           50065                           INDEX    ITEMP5                                
038848,000476: 21,3030           55702                           TS       TRAKLATV                              
038849,000477: 21,3031           50065                           INDEX    ITEMP5                                
038850,000478: 21,3032           30072                           CA       RUPTREG3                              
038851,000479: 21,3033           64754                           AD       NEG0                                  #  AVOIDS +0 DINC HARDWARE MALFUNCTION

Page 907

038853,000481: 21,3034           50065                           INDEX    ITEMP5                                
038854,000482: 21,3035           54053                           TS       CDUTCMD                               
038855,000483: 21,3036           50065                           INDEX    ITEMP5                                
038856,000484: 21,3037           30072                           CA       RUPTREG3                              
038857,000485: 21,3040           50065                           INDEX    ITEMP5                                
038858,000486: 21,3041           27676                           ADS      LATVMETR                              
038859,000487: 21,3042           10065                           CCS      ITEMP5                                #  FIRST MONITOR FORWARD THEN LATERAL VEL.
038860,000488: 21,3043           12620                           TCF      VMONITOR                              
038861,000489: 
038862,000490: 21,3044           35020                           CAF      BITSET                                #  DRIVE THE X-POINTER DISPLAY.
038863,000491: 21,3045           00006                           EXTEND                                         
038864,000492: 21,3046           05014                           WOR      CHAN14                                
038865,000493: 21,3047           01714                           TC       LADQSAVE                              #  GO TO ALTROUT +1 OR TO ALTOUT +1
038866,000494: 21,3050           34755        ZERODATA           CAF      ZERO                                  #  ZERO ALTSAVE AND ALTSAVE +1 - - -
038867,000495: 21,3051           54001                           TS       L                                     #        NO NEGATIVE ALTITUDES ALLOWED.
038868,000496: 21,3052           12270                           TCF      ZDATA2                                
038869,000497: 
038870,000498:                                                                                                  #  ************************************************************************
038871,000499: 
038872,000500: 21,3053           40074        DISPRSET           CS       FLAGWRD0                              #  ARE WE IN DESCENT TRAJECTORY?
038873,000501: 21,3054           74752                           MASK     R10FLBIT                              
038874,000502: 21,3055           00006                           EXTEND                                         
038875,000503: 21,3056           13067                           BZF      ABORTON                               #  NO.
038876,000504: 21,3057           34744                           CAF      BIT8                                  #  YES.
038877,000505: 21,3060           71303                           MASK     IMODES33                              #  CHECK IF INERTIAL DATA JUST DISPLAYED.
038878,000506: 21,3061           10000                           CCS      A                                     
038879,000507: 21,3062           34752                           CAF      BIT2                                  #  YES. DISABLE RR ERROR COUNTER
038880,000508: 21,3063           64744                           AD       BIT8                                  #  NO.  REMOVE DISPLAY INERTIAL DATA
038881,000509: 21,3064           40000                           COM                                            
038882,000510: 21,3065           00006                           EXTEND                                         
038883,000511: 21,3066           03012                           WAND     CHAN12                                
038884,000512: 21,3067           43076        ABORTON            CS       BITS8/7                               #  RESET INERTIAL DATA, INTERLEAVE FLAGS.
038885,000513: 21,3070           71303                           MASK     IMODES33                              
038886,000514: 21,3071           55303                           TS       IMODES33                              
038887,000515: 21,3072           44736                           CS       DIDFLBIT                              
038888,000516: 21,3073           70075                           MASK     FLAGWRD1                              
038889,000517: 21,3074           54075                           TS       FLAGWRD1                              #  RESET DIDFLAG.
038890,000518: 21,3075           15261                           TCF      TASKOVER                              
038891,000519: 
038892,000520:                                                                                                  #  ************************************************************************
038893,000521: 
038894,000522: 21,3076           00300        BITS8/7            OCT      00300                                 #  INERTIAL DATA AND INTERLEAVE FLAGS.
038895,000523: 21,3077     5020               BITSET             =        PRIO6                                 
038896,000524: 
038897,000525:                                                                                                  #  ************************************************************************
038898,000526: 
038899,000527: 

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