Source Code

This is an attempt to recreate Luminary 99 Rev 2, otherwise known as LUM99R2, from Luminary 99 Rev 1 and ephemeris data from Luminary 116. The differences are confined to the last 10-12 lines of the CONTROLLED CONSTANTS. Luminary 99 Rev 1 source-code was transcribed from a printout in the MIT Museum, while Luminary 116 source code was transcribed from a printout belonging to Don Eyles. AGC developer James Kernan, the "rope mother" for the Apollo 11 Lunar Module's AGC, explains as follows: "At the last minute, Dan Lickly, our chief engineer, appeared with ephemerides updates and it took two tries to get it right. The result was that we created Lum99 Revision 1 and Lum99 Revision 2." It is suspected that the former is what's in the MIT Museum, and the latter is what we are trying to recreate here. As for which revision actually flew in Apollo 11, all of the other available surviving evidence points to Rev 1 rather than to Rev 2, so we're just not sure!

015741,000002:                                                                                                  ## Copyright:   Public domain.
015742,000003:                                                                                                  ## Filename:    IMU_PERFORMANCE_TESTS_4.agc
015743,000004:                                                                                                  ## Purpose:     Part of the source code for Luminary 1A build 099.
015744,000005:                                                                                                  ##              It is part of the source code for the Lunar Module's (LM)
015745,000006:                                                                                                  ##              Apollo Guidance Computer (AGC), for Apollo 11.
015746,000007:                                                                                                  ## Assembler:   yaYUL
015747,000008:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
015748,000009:                                                                                                  ## Website:     www.ibiblio.org/apollo.
015749,000010:                                                                                                  ## Pages:       382-389
015750,000011:                                                                                                  ## Mod history: 2009-05-17 RSB  Adapted from the corresponding 
015751,000012:                                                                                                  ##                              Luminary131 file, using page 
015752,000013:                                                                                                  ##                              images from Luminary 1A.
015753,000014:                                                                                                  ##              2016-12-14 RSB  Proofed text comments with octopus/ProoferComments
015754,000015:                                                                                                  ##                              and corrected the errors found.
015755,000016:                                                                                                  ##              2017-03-03 RSB  Snapshot of Luminary 99 Rev 1. 
015756,000017:                                                                                                  ##              2017-03-07 RSB  Comment-text error-fixes noted in proofing Luminary 116.
015757,000018: 

Page 382

015759,000020:                                                                                                  #  PROGRAM -     IMU PERFORMANCE TESTS 4
015760,000021:                                                                                                  #  DATE -        NOV 15, 1966
015761,000022:                                                                                                  #  BY -          GEORGE SCHMIDT IL7-146 EXT 1126
015762,000023:                                                                                                  #  MOD NO-ZERO
015763,000024: 
015764,000025:                                                                                                  #  FUNCTIONAL DESCRIPTION
015765,000026: 
015766,000027:                                                                                                  #  THIS SECTION CONSISTS OF THE FILTER FOR THE GYRO DRIFT TESTS.  NO COMPASS
015767,000028:                                                                                                  #  IS DONE IN LEM.  FOR A DESCRIPTION OF THE FILTER SEE E-1973.  THIS
015768,000029:                                                                                                  #  SECTION IS ENTERED FROM IMU 2.  IT RETURNS THERE AT END OF TEST.
015769,000030: 
015770,000031:                                                                                                  #  EARTHR,OGC ZERO,ERTHRVSE
015771,000032: 
015772,000033:                                                                                                  #  NORMAL EXIT
015773,000034: 
015774,000035:                                                                                                  #  LENGTHOT GOES TO ZERO - RETURN TO IMU PERF TESTS 2 CONTROL
015775,000036: 
015776,000037:                                                                                                  #  ALARMS
015777,000038: 
015778,000039:                                                                                                  #  1600  OVERFLOW IN DRIFT TEST
015779,000040:                                                                                                  #  1601  BAD IMU MODING IN ANY ROUTINE THAT USES IMUSTALL
015780,000041:                                                                                                  #        OUTPUT
015781,000042: 
015782,000043:                                                                                                  #  FLASHING DISPLAY OF RESULTS - CONTROLLED IN IMU PERF TESTS 2
015783,000044: 
015784,000045:                                                                                                  #  DEBRIS
015785,000046: 
015786,000047:                                                                                                  #  ALL CENTRALS - ALL OF EBANK XSM
015787,000048: 

Page 383

015789,000050: 33,2045                                           BANK     33                                    
015790,000051: 37,2000                                           SETLOC   IMU4                                  
015791,000052: 37,2000                                           BANK                                           
015792,000053: 37,2500                                           COUNT*   $$/P07                                
015793,000054: 
015794,000055: 37,2500  E5,1642                                  EBANK=   XSM                                   
015795,000056: 
015796,000057: 37,2500           00004        ESTIMS             INHINT                                         
015797,000058: 37,2501           31572                           CAE      1SECXT                                
015798,000059: 37,2502           05173                           TC       TWIDDLE                               
015799,000060: 37,2503  E5,1642                                  EBANK=   XSM                                   
015800,000061: 37,2503           02536                           ADRES    ALLOOP                                
015801,000062: 37,2504           34755                           CAF      ZERO                                  #  ZERO THE PIPAS
015802,000063: 37,2505           54037                           TS       PIPAX                                 
015803,000064: 37,2506           54040                           TS       PIPAY                                 
015804,000065: 37,2507           54041                           TS       PIPAZ                                 
015805,000066: 37,2510           00003                           RELINT                                         
015806,000067: 37,2511           33075                           CA       77DECML                               
015807,000068: 37,2512           55571                           TS       ZERONDX                               
015808,000069: 37,2513           33076                           CA       ALXXXZ                                
015809,000070: 37,2514           02367                           TC       ZEROING                               
015810,000071: 37,2515           06037                           TC       INTPRET                               
015811,000072: 37,2516           77735                           SLOAD                                          
015812,000073: 37,2517           37057                                    SCHZEROS                              
015813,000074: 37,2520           25477                           STOVL    GCOMPSW    -1                         
015814,000075: 37,2521           37070                                    INTVAL     +2                         
015815,000076: 37,2522           26445                           STOVL    ALX1S                                 
015816,000077: 37,2523           37057                                    SCHZEROS                              
015817,000078: 37,2524           00325                           STORE    DELVX                                 
015818,000079: 37,2525           01472                           STORE    GCOMP                                 
015819,000080: 37,2526           77735                           SLOAD                                          
015820,000081: 37,2527           02441                                    TORQNDX                               
015821,000082: 37,2530           50076                           DCOMP    BMN                                   
015822,000083: 37,2531           76534                                    VERTSKIP                              
015823,000084: 37,2532           77624                           CALL                                           
015824,000085: 37,2533           76401                                    ERTHRVSE                              
015825,000086: 37,2534           77776        VERTSKIP           EXIT                                           
015826,000087: 37,2535           03035                           TC       SLEEPIE    +1                         
015827,000088: 

Page 384

015829,000090: 37,2536           31576        ALLOOP             CA       OVFLOWCK                              
015830,000091: 37,2537           00006                           EXTEND                                         
015831,000092: 37,2540           12542                           BZF      +2                                    
015832,000093: 37,2541           05261                           TC       TASKOVER                              
015833,000094: 37,2542           11530                           CCS      ALTIM                                 
015834,000095: 37,2543           30000                           CA       A                                     #  SHOULD NEVER HIT THIS LOCATION
015835,000096: 37,2544           55531                           TS       ALTIMS                                
015836,000097: 37,2545           40000                           CS       A                                     
015837,000098: 37,2546           55530                           TS       ALTIM                                 
015838,000099: 37,2547           44753                           CS       ONE                                   
015839,000100: 37,2550           61562                           AD       GEOCOMPS                              
015840,000101: 37,2551           00006                           EXTEND                                         
015841,000102: 37,2552           12556                           BZF      +4                                    
015842,000103: 37,2553           31412                           CA       LENGTHOT                              
015843,000104: 37,2554           00006                           EXTEND                                         
015844,000105: 37,2555           62562                           BZMF     +5                                    
015845,000106: 37,2556           31572                           CAE      1SECXT                                
015846,000107: 37,2557           05173                           TC       TWIDDLE                               
015847,000108: 37,2560  E5,1642                                  EBANK=   XSM                                   
015848,000109: 37,2560           02536                           ADRES    ALLOOP                                
015849,000110: 37,2561           34755                           CAF      ZERO                                  
015850,000111: 37,2562           56037                           XCH      PIPAX                                 
015851,000112: 37,2563           54324                           TS       DELVX                                 
015852,000113: 37,2564           34755                           CAF      ZERO                                  
015853,000114: 37,2565           56040                           XCH      PIPAY                                 
015854,000115: 37,2566           54326                           TS       DELVY                                 
015855,000116: 37,2567           34755                           CAF      ZERO                                  
015856,000117: 37,2570           56041                           XCH      PIPAZ                                 
015857,000118: 37,2571           54330                           TS       DELVZ                                 
015858,000119: 37,2572           34736        SPECSTS            CAF      PRIO20                                
015859,000120: 37,2573           05105                           TC       FINDVAC                               
015860,000121: 37,2574  E5,1642                                  EBANK=   XSM                                   
015861,000122: 37,2574           02577 76065                     2CADR    ALFLT                                 #  START THE JOB
015862,000123: 
015863,000124: 37,2576           05261                           TC       TASKOVER                              
015864,000125: 

Page 385

015866,000127: 37,2577           11562        ALFLT              CCS      GEOCOMPS                              
015867,000128: 37,2600           02602                           TC       +2                                    
015868,000129: 37,2601           02604                           TC       NORMLOP                               
015869,000130: 37,2602           04616                           TC       BANKCALL                              
015870,000131: 37,2603           15263                           CADR     1/PIPA                                
015871,000132: 37,2604           06037        NORMLOP            TC       INTPRET                               
015872,000133: 37,2605           77745                           DLOAD                                          
015873,000134: 37,2606           37066                                    INTVAL                                
015874,000135: 37,2607           24051                           STOVL    S1                                    
015875,000136: 37,2610           00325                                    DELVX                                 
015876,000137: 37,2611           76505                           VXM      VSL1                                  
015877,000138: 37,2612           02643                                    XSM                                   
015878,000139: 37,2613           57545                           DLOAD    DCOMP                                 
015879,000140: 37,2614           00160                                    MPAC       +3                         
015880,000141: 37,2615           16523                           STODL    DPIPAY                                
015881,000142: 37,2616           00162                                    MPAC       +5                         
015882,000143: 37,2617           02527                           STORE    DPIPAZ                                
015883,000144: 
015884,000145: 37,2620           76001                           SETPD    AXT,1                                 
015885,000146: 37,2621           00001                                    0                                     
015886,000147: 37,2622           00010                                    8D                                    
015887,000148: 37,2623           57535                           SLOAD    DCOMP                                 
015888,000149: 37,2624           02563                                    GEOCOMPS                              
015889,000150: 37,2625           77640                           BMN                                            
015890,000151: 37,2626           76772                                    PERFERAS                              
015891,000152: 37,2627           50135        ALCGKK             SLOAD    BMN                                   
015892,000153: 37,2630           02532                                    ALTIMS                                
015893,000154: 37,2631           76644                                    ALFLT3                                
015894,000155: 37,2632           72174        ALKCG              AXT,2    LXA,1                                 #  LOADS SLOPES AND TIME CONSTANTS AT RQST
015895,000156: 37,2633           00014                                    12D                                   
015896,000157: 37,2634           02444                                    ALX1S                                 
015897,000158: 37,2635           62143        ALKCG2             DLOAD*   INCR,1                                
015898,000159: 37,2636           02243                                    ALFDK      +144D,1                    
015899,000160: 37,2637           77775                           DEC      -2         B-14                       
015900,000161: 37,2640           12545                           STORE    ALDK       +10D,2                     
015901,000162: 37,2641           66104                           TIX,2    SXA,1                                 
015902,000163: 37,2642           76635                                    ALKCG2                                
015903,000164: 37,2643           02444                                    ALX1S                                 
015904,000165: 
015905,000166: 37,2644           77770        ALFLT3             AXT,1                                          
015906,000167: 37,2645           00010                                    8D                                    
015907,000168: 37,2646           41343        DELMLP             DLOAD*   DMP                                   
015908,000169: 37,2647           02533                                    DPIPAY     +8D,1                      
015909,000170: 37,2650           37100                                    PIPASC                                
015910,000171: 37,2651           43661                           SLR      BDSU*                                 
015911,000172: 37,2652           21212                                    9D                                    
015912,000173: 37,2653           02501                                    INTY       +8D,1                      
015913,000174: 37,2654           06501                           STORE    INTY       +8D,1                      
015914,000175: 37,2655           40725                           PDDL     DMP*                                  
015915,000176: 37,2656           37102                                    VELSC                                 

Page 386

015917,000178: 37,2657           02521                                    VLAUN      +8D,1                      
015918,000179: 37,2660           77732                           SL2R                                           
015919,000180: 37,2661           45425                           DSU      STADR                                 
015920,000181: 37,2662           71216                           STORE    DELM       +8D,1                      
015921,000182: 37,2663           06563                           STORE    DELM       +10D,1                     
015922,000183: 37,2664           77100                           TIX,1    AXT,2                                 
015923,000184: 37,2665           76646                                    DELMLP                                
015924,000185: 37,2666           00004                                    4                                     
015925,000186: 37,2667           56743        ALILP              DLOAD*   DMPR*                                 
015926,000187: 37,2670           75324                                    ALK        +4,2                       
015927,000188: 37,2671           75240                                    ALDK       +4,2                       
015928,000189: 37,2672           12453                           STORE    ALK        +4,2                       
015929,000190: 37,2673           77104                           TIX,2    AXT,2                                 
015930,000191: 37,2674           76667                                    ALILP                                 
015931,000192: 37,2675           00010                                    8D                                    
015932,000193: 37,2676           66140        ALKLP              LXC,1    SXA,1                                 
015933,000194: 37,2677           02445                                    CMPX1                                 
015934,000195: 37,2700           02445                                    CMPX1                                 
015935,000196: 37,2701           56743                           DLOAD*   DMPR*                                 
015936,000197: 37,2702           02450                                    ALK        +1,1                       
015937,000198: 37,2703           75216                                    DELM       +8D,2                      
015938,000199: 37,2704           77613                           DAD*                                           
015939,000200: 37,2705           75276                                    INTY       +8D,2                      
015940,000201: 37,2706           12501                           STORE    INTY       +8D,2                      
015941,000202: 37,2707           42743                           DLOAD*   DAD*                                  
015942,000203: 37,2710           75314                                    ALK        +12D,2                     
015943,000204: 37,2711           75230                                    ALDK       +12D,2                     
015944,000205: 37,2712           12463                           STORE    ALK        +12D,2                     
015945,000206: 37,2713           42673                           DMPR*    DAD*                                  
015946,000207: 37,2714           75216                                    DELM       +8D,2                      
015947,000208: 37,2715           75266                                    INTY       +16D,2                     
015948,000209: 37,2716           12511                           STORE    INTY       +16D,2                     
015949,000210: 37,2717           40743                           DLOAD*   DMP*                                  
015950,000211: 37,2720           37105                                    ALSK       +1,1                       
015951,000212: 37,2721           75216                                    DELM       +8D,2                      
015952,000213: 37,2722           42772                           SL1R     DAD*                                  
015953,000214: 37,2723           75256                                    VLAUN      +8D,2                      
015954,000215: 37,2724           12521                           STORE    VLAUN      +8D,2                      
015955,000216: 37,2725           76104                           TIX,2    AXT,1                                 
015956,000217: 37,2726           76676                                    ALKLP                                 
015957,000218: 37,2727           00010                                    8D                                    
015958,000219: 
015959,000220: 37,2730           64743        LOOSE              DLOAD*   PDDL*                                 
015960,000221: 37,2731           02523                                    ACCWD      +8D,1                      
015961,000222: 37,2732           02521                                    VLAUN      +8D,1                      
015962,000223: 37,2733           55523                           PDDL*    VDEF                                  
015963,000224: 37,2734           02531                                    POSNV      +8D,1                      
015964,000225: 37,2735           76521                           MXV      VSL1                                  
015965,000226: 37,2736           02001                                    TRANSM1                               

Page 387

015967,000228: 37,2737           77745                           DLOAD                                          
015968,000229: 37,2740           00155                                    MPAC                                  
015969,000230: 37,2741           06531                           STORE    POSNV      +8D,1                      
015970,000231: 37,2742           77745                           DLOAD                                          
015971,000232: 37,2743           00160                                    MPAC       +3                         
015972,000233: 37,2744           06521                           STORE    VLAUN      +8D,1                      
015973,000234: 37,2745           77745                           DLOAD                                          
015974,000235: 37,2746           00162                                    MPAC       +5                         
015975,000236: 37,2747           06523                           STORE    ACCWD      +8D,1                      
015976,000237: 37,2750           77700                           TIX,1                                          
015977,000238: 37,2751           76730                                    LOOSE                                 
015978,000239: 
015979,000240: 37,2752           76174                           AXT,2    AXT,1                                 #  EVALUATE SINES AND COSINES
015980,000241: 37,2753           00006                                    6                                     
015981,000242: 37,2754           00002                                    2                                     
015982,000243: 37,2755           57343        BOOP               DLOAD*   DMPR                                  
015983,000244: 37,2756           02503                                    ANGX       +2,1                       
015984,000245: 37,2757           37110                                    GEORGEJ                               
015985,000246: 37,2760           77722                           SR2R                                           
015986,000247: 37,2761           73406                           PUSH     SIN                                   
015987,000248: 37,2762           56072                           SL3R     XAD,1                                 
015988,000249: 37,2763           00046                                    X1                                    
015989,000250: 37,2764           10021                           STORE    16D,2                                 
015990,000251: 37,2765           77745                           DLOAD                                          
015991,000252: 37,2766           77746                           COS                                            
015992,000253: 37,2767           10027                           STORE    22D,2                                 #  COSINES
015993,000254: 37,2770           77704                           TIX,2                                          
015994,000255: 37,2771           76755                                    BOOP                                  
015995,000256: 
015996,000257: 37,2772           77776        PERFERAS           EXIT                                           
015997,000258: 37,2773           35016                           CA       EBANK7                                
015998,000259: 37,2774           54003                           TS       EBANK                                 
015999,000260: 37,2775  E7,1400                                  EBANK=   ATIGINC                               
016000,000261: 37,2775           01400                           TC       ATIGINC                               #  GOTO ERASABLE TO CALCULATE ONLY TO RETN
016001,000262: 
016002,000263:                                                                                                  #                             CAUTION
016003,000264: 
016004,000265:                                                                                                  #  THE ERASABLE PROGRAM THAT DOES THE CALCULATIONS MUST BE LOADED
016005,000266:                                                                                                  #  BEFORE ANY ATTEMPT IS MADE TO RUN THE IMU PERFORMANCE TEST
016006,000267: 
016007,000268: 37,2776  E5,1400                                  EBANK=   AZIMUTH                               
016008,000269: 37,2776           11412                           CCS      LENGTHOT                              
016009,000270: 37,2777           03034                           TC       SLEEPIE                               
016010,000271: 37,3000           11440                           CCS      TORQNDX                               
016011,000272: 37,3001           13003                           TCF      +2                                    
016012,000273: 37,3002           03005                           TC       SETUPER1                              
016013,000274: 37,3003           30032                           CA       CDUX                                  
016014,000275: 37,3004           55414                           TS       LOSVEC     +1                         #  FOR TROUBLESHOOTING VD POSNS 2$4
016015,000276: 

Page 388

016017,000278: 37,3005           06037        SETUPER1           TC       INTPRET                               
016018,000279: 37,3006           65345                           DLOAD    PDDL                                  #  ANGLES FROM DRIFT TEST ONLY
016019,000280: 37,3007           02473                                    ANGZ                                  
016020,000281: 37,3010           02477                                    ANGY                                  
016021,000282: 37,3011           55525                           PDDL     VDEF                                  
016022,000283: 37,3012           02501                                    ANGX                                  
016023,000284: 37,3013           74276                           VCOMP    VXSC                                  
016024,000285: 37,3014           37110                                    GEORGEJ                               
016025,000286: 37,3015           74521                           MXV      VSR1                                  
016026,000287: 37,3016           02643                                    XSM                                   
016027,000288: 37,3017           02740                           STORE    OGC                                   
016028,000289: 37,3020           77776                           EXIT                                           
016029,000290: 
016030,000291: 37,3021           32475                           CA       OGCPL                                 
016031,000292: 37,3022           04616                           TC       BANKCALL                              
016032,000293: 37,3023           17323                           CADR     IMUPULSE                              
016033,000294: 37,3024           02315                           TC       IMUSLLLG                              
016034,000295: 37,3025           11440        GEOSTRT4           CCS      TORQNDX                               #  ONLY POSITIVE IF IN VERTICAL DRIFT TEST
016035,000296: 37,3026           02263                           TC       VALMIS                                
016036,000297: 37,3027           06037                           TC       INTPRET                               
016037,000298: 37,3030           77624                           CALL                                           
016038,000299: 37,3031           76401                                    ERTHRVSE                              
016039,000300: 37,3032           77776                           EXIT                                           
016040,000301: 37,3033           02117                           TC       TORQUE                                
016041,000302: 
016042,000303: 37,3034           55412        SLEEPIE            TS       LENGTHOT                              #  TEST NOT OVER-DECREMENT LENGTHOT
016043,000304: 37,3035           11440                           CCS      TORQNDX                               #  ARE WE DOING VERTDRIFT
016044,000305: 37,3036           02447                           TC       EARTHR*                               
016045,000306: 37,3037           05155                           TC       ENDOFJOB                              
016046,000307: 
016047,000308: 37,3040           35014        SOMEERRR           CA       EBANK5                                
016048,000309: 37,3041           54003                           TS       EBANK                                 
016049,000310: 37,3042           34753                           CA       ONE                                   
016050,000311: 37,3043           55576                           TS       OVFLOWCK                              #  STOP ALLOOP FROM CALLING ITSELF
016051,000312: 37,3044           05567                           TC       ALARM                                 
016052,000313: 37,3045           01600                           OCT      1600                                  
016053,000314: 37,3046           02270                           TC       ENDTEST1                              
016054,000315: 37,3047           33054        SOMERR2            CAF      OCT1601                               
016055,000316: 37,3050           05744                           TC       VARALARM                              
016056,000317: 37,3051           05516                           TC       DOWNFLAG                              
016057,000318: 37,3052           00007                           ADRES    IMUSE                                 
016058,000319: 37,3053           05155                           TC       ENDOFJOB                              
016059,000320: 
016060,000321: 37,3054           01601        OCT1601            OCT      01601                                 
016061,000322: 37,3055           06200        DEC585             OCT      06200                                 #  3200 B+14 ORDER IS IMPORTANT
016062,000323: 37,3056           00000 00000  SCHZEROS           2DEC     .00000000                             

Page 389

016064,000325: 37,3060           00000 00000                     2DEC     .00000000                             
016065,000326: 
016066,000327: 37,3062           00000                           OCT      00000                                 
016067,000328: 37,3063           00000        ONEDPP             OCT      00000                                 #  ORDER IS IMPORTANT
016068,000329: 37,3064           00001                           OCT      00001                                 
016069,000330: 
016070,000331: 37,3065           00004        INTVAL             OCT      4                                     
016071,000332: 37,3066           00002                           OCT      2                                     
016072,000333: 37,3067           00220                           DEC      144        B-14                       
016073,000334: 37,3070           77776                           DEC      -1         B-14                       
016074,000335: 37,3071           35730 00035  SOUPLY             2DEC     .93505870                             #  INITIAL GAINS FOR PIP OUTPUTS
016075,000336: 
016076,000337: 37,3073           10317 17550                     2DEC     .26266423                             #  INITIAL GAINS/4 FOR ERECTION ANGLES
016077,000338: 
016078,000339: 37,3075           00115        77DECML            DEC      77         B-14                       
016079,000340: 37,3076           01443        ALXXXZ             GENADR   ALX1S      -1                         
016080,000341: 37,3077           04133 02265  PIPASC             2DEC     .13055869                             
016081,000342: 
016082,000343: 37,3101           57223 66451  VELSC              2DEC     -.52223476                            #  512/980.402
016083,000344: 
016084,000345: 37,3103           05427 12577  ALSK               2DEC     .17329931                             #  SSWAY VEL GAIN X 980.402/4096
016085,000346: 
016086,000347: 37,3105           77567 44202                     2DEC     -.00835370                            #  SSWAY ACCEL GAIN X 980.402/4096
016087,000348: 
016088,000349: 37,3107           24276 14066  GEORGEJ            2DEC     .63661977                             
016089,000350: 
016090,000351: 37,3111           23073 11773  GEORGEK            2DEC     .59737013                             
016091,000352: 

End of include-file IMU_PERFORMANCE_TESTS_4.agc.  Parent file is MAIN.agc