Source Code
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These source-code files derive from a printout of Luminary 116 (the Apollo 12
Lunar Module guidance computer program), from the personal library of
original AGC developer Don Eyles, digitally photographed at archive.org,
financially sponsored by Ron Burkey, and transcribed to source code by a
team of volunteers. This colorized, syntax-highlighted form was created
by assembling that transcribed source code. Note that the full page images
are available on the
Virtual AGC project page at archive.org, while reduced-size images
are presented at the VirtualAGC project website. Report or fix any
transcription errors at
the Virtual AGC project code repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision. |
015665,000002: ## Copyright: Public domain.
015666,000003: ## Filename: IMU_PERFORMANCE_TESTS_2.agc
015667,000004: ## Purpose: A section of Luminary revision 116.
015668,000005: ## It is part of the source code for the Lunar Module's (LM)
015669,000006: ## Apollo Guidance Computer (AGC) for Apollo 12.
015670,000007: ## This file is intended to be a faithful transcription, except
015671,000008: ## that the code format has been changed to conform to the
015672,000009: ## requirements of the yaYUL assembler rather than the
015673,000010: ## original YUL assembler.
015674,000011: ## Reference: pp. 374-382
015675,000012: ## Assembler: yaYUL
015676,000013: ## Contact: Ron Burkey <info@sandroid.org>.
015677,000014: ## Website: www.ibiblio.org/apollo/index.html
015678,000015: ## Mod history: 2017-01-22 MAS Created from Luminary 99.
015679,000016: ## 2017-03-07 RSB Transcribed, and then proofed comment-text using
015680,000017: ## 3-way diff vs Luminary 99 and Luminary 131.
015681,000018: ## (Admittedly, the former is more for detecting errors
015682,000019: ## in Luminary 99 than the other way around.)
015683,000020:
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Page 374 |
015685,000022: # NAME - IMU PERFORMANCE TESTS 2
015686,000023:
015687,000024: # DATE - MARCH 20, 1967
015688,000025:
015689,000026: # BY - SYSTEM TEST GROUP 864-6900 EXT. 1274
015690,000027:
015691,000028: # MODNO.- ZERO
015692,000029:
015693,000030: # FUNCTIONAL DESCRIPTION
015694,000031:
015695,000032: # POSITIONING ROUTINES FOR THE IMU PERFORMANCE TESTS AS WELL AS SOME OF
015696,000033: # THE TESTS THEMSELVES. FOR A DESCRIPTION OF THESE SUBROUTINES AND THE
015697,000034: # OPERATING PROCEDURES (TYPICALLY) SEE STG MEMO 685.THEORETICAL REF.E-1973
015698,000035:
015699,000036: 33,2045 BANK 33
015700,000037: 37,2000 SETLOC IMU2
015701,000038: 37,2000 BANK
015702,000039: 37,2002 E5,1416 EBANK= POSITON
015703,000040: 37,2002 COUNT* $$/P07
015704,000041:
015705,000042: 37,2002 05311 REDO TC NEWMODEX
015706,000043: 37,2003 00007 MM 07 B-14
015707,000044:
015708,000045: 37,2004 02325 GEOIMUTT TC IMUZERR
015709,000046: 37,2005 34755 IMUBACK CA ZERO
015710,000047: 37,2006 55414 TS NDXCTR
015711,000048: 37,2007 55440 TS TORQNDX
015712,000049: 37,2010 55441 TS TORQNDX +1
015713,000050: 37,2011 55576 TS OVFLOWCK
015714,000051: 37,2012 34361 NBPOSPL CA DEC17
015715,000052: 37,2013 55571 TS ZERONDX
015716,000053: 37,2014 32476 CA XNBADR
015717,000054: 37,2015 02367 TC ZEROING
015718,000055: 37,2016 34736 CA HALF
015719,000056: 37,2017 55664 TS XNB
015720,000057: 37,2020 06042 GUESS TC INTPRET
015721,000058: 37,2021 62545 LATAZCHK DLOAD SL2
015722,000059: 37,2022 02403 LATITUDE
015723,000060: 37,2023 15046 STODL DSPTEM1 +1
015724,000061: 37,2024 02401 AZIMUTH
015725,000062: 37,2025 77434 RTB EXIT
015726,000063: 37,2026 21615 1STO2S
015727,000064: 37,2027 56154 XCH MPAC
015728,000065: 37,2030 55044 TS DSPTEM1
015729,000066: 37,2031 32473 CAF VN0641
015730,000067: 37,2032 04616 TC BANKCALL
015731,000068: 37,2033 20477 CADR GOFLASH
015732,000069: 37,2034 02270 TC ENDTEST1
015733,000070: 37,2035 02037 TC +2
015734,000071: 37,2036 02031 TC -5
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Page 375 |
015736,000073: 37,2037 06042 TC INTPRET
015737,000074: 37,2040 47135 SLOAD RTB
015738,000075: 37,2041 01045 DSPTEM1
015739,000076: 37,2042 21577 CDULOGIC
015740,000077: 37,2043 02401 STORE AZIMUTH
015741,000078: 37,2044 60535 SLOAD SR2
015742,000079: 37,2045 01046 DSPTEM1 +1
015743,000080: 37,2046 02403 STORE LATITUDE
015744,000081: 37,2047 57546 COS DCOMP
015745,000082: 37,2050 77752 SL1
015746,000083: 37,2051 16437 STODL WANGI
015747,000084: 37,2052 02403 LATITUDE
015748,000085: 37,2053 72556 SIN SL1
015749,000086: 37,2054 16435 STODL WANGO
015750,000087: 37,2055 02401 AZIMUTH
015751,000088: 37,2056 73406 PUSH SIN
015752,000089: 37,2057 02675 STORE YNB +2
015753,000090: 37,2060 16705 STODL ZNB +4
015754,000091: 37,2061 77746 COS
015755,000092: 37,2062 02677 STORE YNB +4
015756,000093: 37,2063 77676 DCOMP
015757,000094: 37,2064 36703 POSGMBL STCALL ZNB +2
015758,000095: 37,2065 47355 CALCGA
015759,000096: 37,2066 77776 EXIT
015760,000097: 37,2067 04616 TC BANKCALL
015761,000098: 37,2070 16772 CADR IMUCOARS
015762,000099: 37,2071 34736 CAF BIT14 # IF BIT14 SET, GIMBAL LOCK
015763,000100: 37,2072 70077 MASK FLAGWRD3
015764,000101: 37,2073 00006 EXTEND
015765,000102: 37,2074 12076 BZF +2
015766,000103: 37,2075 25414 INCR NDXCTR # +1 IF IN GIMBAL LOCK, OTHERWISE 0
015767,000104: 37,2076 05516 TC DOWNFLAG
015768,000105: 37,2077 00056 ADRES GLOKFAIL # RESET GIMBAL LOCK FLAG
015769,000106: 37,2100 02315 TC IMUSLLLG
015770,000107: 37,2101 11414 CCS NDXCTR # IF ONE GO AND DO A PIPA TEST ONLY
015771,000108: 37,2102 02126 TC PIPACHK # ALIGN AND MEASURE VERTICAL PIPA RATE
015772,000109: 37,2103 02320 TC FINIMUDD
015773,000110: 37,2104 00006 EXTEND
015774,000111: 37,2105 31575 DCA PERFDLAY
015775,000112: 37,2106 05277 TC LONGCALL # DELAY WHILE SUSPENSION STABILIZES
015776,000113: 37,2107 E5,1416 EBANK= POSITON
015777,000114: 37,2107 02113 76065 2CADR GOESTIMS
015778,000115:
015779,000116: 37,2111 32116 CA ESTICADR
015780,000117: 37,2112 05133 TC JOBSLEEP
015781,000118: 37,2113 32116 GOESTIMS CA ESTICADR
015782,000119: 37,2114 05137 TC JOBWAKE
015783,000120: 37,2115 05261 TC TASKOVER
015784,000121: 37,2116 76500 ESTICADR CADR ESTIMS
015785,000122: 37,2117 34755 TORQUE CA ZERO
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Page 376 |
015787,000124: 37,2120 55047 TS DSPTEM2
015788,000125: 37,2121 31504 CA DRIFTI
015789,000126: 37,2122 55050 TS DSPTEM2 +1
015790,000127: 37,2123 51416 INDEX POSITON
015791,000128: 37,2124 55420 TS SOUTHDR -1
015792,000129: 37,2125 02457 TC SHOW
015793,000130:
015794,000131: 37,2126 51414 PIPACHK INDEX NDXCTR # PIPA TEST
015795,000132: 37,2127 02130 TC +1
015796,000133: 37,2130 02447 TC EARTHR*
015797,000134: 37,2131 34361 CA DEC17 # ALLOW PIP COUNTER TO OVERFLOW 17 TIMES
015798,000135: 37,2132 55476 TS DATAPL +4 # IN THE ALLOTED TIME INTERVAL
015799,000136: 37,2133 32474 CA DEC58
015800,000137: 37,2134 55412 TS LENGTHOT
015801,000138: 37,2135 34753 CA ONE
015802,000139: 37,2136 55537 TS RESULTCT
015803,000140: 37,2137 34755 CA ZERO
015804,000141: 37,2140 51415 INDEX PIPINDEX
015805,000142: 37,2141 54037 TS PIPAX
015806,000143: 37,2142 55472 TS DATAPL
015807,000144: 37,2143 02332 TC CHECKG
015808,000145: 37,2144 00004 INHINT
015809,000146: 37,2145 34752 CAF TWO
015810,000147: 37,2146 05173 TC TWIDDLE
015811,000148: 37,2147 E5,1642 EBANK= XSM
015812,000149: 37,2147 02151 ADRES PIPATASK
015813,000150: 37,2150 05155 TC ENDOFJOB
015814,000151:
015815,000152: 37,2151 00006 PIPATASK EXTEND
015816,000153: 37,2152 27412 DIM LENGTHOT
015817,000154: 37,2153 31412 CA LENGTHOT
015818,000155: 37,2154 00006 EXTEND
015819,000156: 37,2155 62161 BZMF STARTPIP
015820,000157: 37,2156 34742 CAF BIT10
015821,000158: 37,2157 05173 TC TWIDDLE
015822,000159: 37,2160 E5,1642 EBANK= XSM
015823,000160: 37,2160 02151 ADRES PIPATASK
015824,000161: 37,2161 34736 STARTPIP CAF PRIO20
015825,000162: 37,2162 05105 TC FINDVAC
015826,000163: 37,2163 E5,1642 EBANK= XSM
015827,000164: 37,2163 02166 76065 2CADR PIPJOBB
015828,000165:
015829,000166: 37,2165 05261 TC TASKOVER
015830,000167:
015831,000168: 37,2166 51414 PIPJOBB INDEX NDXCTR
015832,000169: 37,2167 02170 TC +1
015833,000170: 37,2170 02447 TC EARTHR*
015834,000171: 37,2171 31412 CA LENGTHOT
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Page 377 |
015836,000173: 37,2172 00006 EXTEND
015837,000174: 37,2173 62175 BZMF +2
015838,000175: 37,2174 05155 TC ENDOFJOB
015839,000176:
015840,000177: 37,2175 34756 CA FIVE
015841,000178: 37,2176 55537 TS RESULTCT
015842,000179: 37,2177 02332 TC CHECKG
015843,000180: 37,2200 11473 CCS DATAPL +1
015844,000181: 37,2201 02205 TC +4
015845,000182: 37,2202 05675 TC CCSHOLE
015846,000183: 37,2203 41476 CS DATAPL +4
015847,000184: 37,2204 55476 TS DATAPL +4
015848,000185: 37,2205 00006 EXTEND
015849,000186: 37,2206 41473 DCS DATAPL
015850,000187: 37,2207 21477 DAS DATAPL +4
015851,000188:
015852,000189: 37,2210 06042 TC INTPRET
015853,000190: 37,2211 45345 DLOAD DSU
015854,000191: 37,2212 02501 DATAPL +6
015855,000192: 37,2213 02475 DATAPL +2
015856,000193: 37,2214 45044 BPL CALL
015857,000194: 37,2215 76217 AINGOTN
015858,000195: 37,2216 76275 OVERFFIX
015859,000196: 37,2217 56325 AINGOTN PDDL DDV
015860,000197: 37,2220 02477 DATAPL +4
015861,000198: 37,2221 47075 DMPR RTB
015862,000199: 37,2222 37056 DEC585 # DEC585 HAS BEEN REDEFINED FOR LEM
015863,000200: 37,2223 21613 SGNAGREE
015864,000201: 37,2224 01050 STORE DSPTEM2
015865,000202: 37,2225 77776 EXIT
015866,000203: 37,2226 11414 CCS NDXCTR
015867,000204: 37,2227 02301 TC COAALIGN # TAKE PLATFORM OUT OF GIMBAL LOCK
015868,000205: 37,2230 02457 TC SHOW
015869,000206: 37,2231 32471 VERTDRFT CA 3990DEC # ABOUT 1 HOUR VERTICAL DRIFT TEST
015870,000207: 37,2232 55412 TS LENGTHOT
015871,000208: 37,2233 51416 INDEX POSITON
015872,000209: 37,2234 41417 CS SOUTHDR -2
015873,000210: 37,2235 55442 TS DRIFTT
015874,000211: 37,2236 11415 CCS PIPINDEX # OFFSET PLATFORM TO MISS PIP DEAD-ZONES
015875,000212: 37,2237 12245 TCF PON4 # Z UP IN POS 4
015876,000213: 37,2240 44747 PON2 CS BIT5 # X UP
015877,000214: 37,2241 27565 ADS ERCOMP +2
015878,000215: 37,2242 34747 CA BIT5
015879,000216: 37,2243 27567 ADS ERCOMP +4
015880,000217: 37,2244 12251 TCF PON
015881,000218: 37,2245 44747 PON4 CS BIT5
015882,000219: 37,2246 27565 ADS ERCOMP +2
015883,000220: 37,2247 34747 CA BIT5
015884,000221: 37,2250 27563 ADS ERCOMP
015885,000222: 37,2251 02447 PON TC EARTHR*
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Page 378 |
015887,000224: 37,2252 34755 CA ZERO # ALLOW ONLY SOUTH GYRO EARTH RATE COMPENS
015888,000225: 37,2253 55404 TS ERVECTOR
015889,000226: 37,2254 55405 TS ERVECTOR +1
015890,000227: 37,2255 34733 GUESS1 CAF POSMAX
015891,000228: 37,2256 55440 TS TORQNDX
015892,000229: 37,2257 55441 TS TORQNDX +1
015893,000230: 37,2260 30032 CA CDUX
015894,000231: 37,2261 55413 TS LOSVEC
015895,000232: 37,2262 02500 TC ESTIMS
015896,000233: 37,2263 31502 VALMIS CA DRIFTO
015897,000234: 37,2264 55050 TS DSPTEM2 +1
015898,000235: 37,2265 34755 CA ZERO
015899,000236: 37,2266 55047 TS DSPTEM2
015900,000237: 37,2267 02457 TC SHOW
015901,000238:
015902,000239: 37,2270 05516 ENDTEST1 TC DOWNFLAG
015903,000240: 37,2271 00007 ADRES IMUSE
015904,000241: 37,2272 44755 CS ZERO
015905,000242: 37,2273 05314 TC NEWMODEA
015906,000243: 37,2274 05472 TC ENDEXT
015907,000244:
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Page 379 |
015909,000246: 37,2275 43215 OVERFFIX DAD DAD
015910,000247: 37,2276 06532 DPPOSMAX
015911,000248: 37,2277 37064 ONEDPP
015912,000249: 37,2300 77616 RVQ
015913,000250:
015914,000251: 37,2301 00006 COAALIGN EXTEND # COARSE ALIGN SUBROUTINE
015915,000252: 37,2302 23571 QXCH ZERONDX
015916,000253: 37,2303 34755 CA ZERO
015917,000254: 37,2304 54321 TS THETAD
015918,000255: 37,2305 54322 TS THETAD +1
015919,000256: 37,2306 54323 TS THETAD +2
015920,000257: 37,2307 04616 TC BANKCALL
015921,000258: 37,2310 16772 CADR IMUCOARS
015922,000259: 37,2311 04616 ALIGNCOA TC BANKCALL
015923,000260: 37,2312 17710 CADR IMUSTALL
015924,000261: 37,2313 03047 TC SOMERR2
015925,000262: 37,2314 01571 TC ZERONDX
015926,000263:
015927,000264: 37,2315 00006 IMUSLLLG EXTEND
015928,000265: 37,2316 23571 QXCH ZERONDX
015929,000266: 37,2317 02311 TC ALIGNCOA
015930,000267:
015931,000268: 37,2320 00006 FINIMUDD EXTEND
015932,000269: 37,2321 23571 QXCH ZERONDX
015933,000270: 37,2322 04616 TC BANKCALL
015934,000271: 37,2323 17202 CADR IMUFINE
015935,000272: 37,2324 02311 TC ALIGNCOA
015936,000273:
015937,000274: 37,2325 00006 IMUZERR EXTEND
015938,000275: 37,2326 23571 QXCH ZERONDX
015939,000276: 37,2327 04616 TC BANKCALL
015940,000277: 37,2330 16706 CADR IMUZERO
015941,000278: 37,2331 02311 TC ALIGNCOA
015942,000279:
015943,000280: 37,2332 00006 CHECKG EXTEND # PIP PULSE CATCHING ROUTINE
015944,000281: 37,2333 23417 QXCH QPLACE
015945,000282: 37,2334 02342 TC +6
015946,000283: 37,2335 00003 CHECKG1 RELINT
015947,000284: 37,2336 30067 CA NEWJOB
015948,000285: 37,2337 00006 EXTEND
015949,000286: 37,2340 62346 BZMF +6
015950,000287: 37,2341 05122 TC CHANG1
015951,000288: 37,2342 00004 INHINT
015952,000289: 37,2343 51415 INDEX PIPINDEX
015953,000290: 37,2344 40037 CS PIPAX
015954,000291: 37,2345 55571 TS ZERONDX
015955,000292: 37,2346 00004 INHINT
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Page 380 |
015957,000294: 37,2347 51415 INDEX PIPINDEX
015958,000295: 37,2350 30037 CA PIPAX
015959,000296: 37,2351 61571 AD ZERONDX
015960,000297: 37,2352 00006 EXTEND
015961,000298: 37,2353 12335 BZF CHECKG1
015962,000299: 37,2354 51415 INDEX PIPINDEX
015963,000300: 37,2355 30037 CA PIPAX
015964,000301: 37,2356 51537 INDEX RESULTCT
015965,000302: 37,2357 55472 TS DATAPL
015966,000303: 37,2360 04102 TC FINETIME
015967,000304: 37,2361 51537 INDEX RESULTCT
015968,000305: 37,2362 55473 TS DATAPL +1
015969,000306: 37,2363 51537 INDEX RESULTCT
015970,000307: 37,2364 23474 LXCH DATAPL +2
015971,000308: 37,2365 00003 RELINT
015972,000309: 37,2366 01417 ENDCHKG TC QPLACE
015973,000310:
015974,000311: 37,2367 54001 ZEROING TS L
015975,000312: 37,2370 12372 TCF +2
015976,000313: 37,2371 55571 ZEROING1 TS ZERONDX
015977,000314: 37,2372 34755 CAF ZERO
015978,000315: 37,2373 50001 INDEX L
015979,000316: 37,2374 54000 TS 0
015980,000317: 37,2375 24001 INCR L
015981,000318: 37,2376 11571 CCS ZERONDX
015982,000319: 37,2377 12371 TCF ZEROING1
015983,000320: 37,2400 00002 TC Q
015984,000321:
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Page 381 |
015986,000323: 37,2401 65345 ERTHRVSE DLOAD PDDL
015987,000324: 37,2402 37057 SCHZEROS # PD24 = (SIN -COS 0)(OMEG/MS)
015988,000325: 37,2403 02403 LATITUDE
015989,000326: 37,2404 57546 COS DCOMP
015990,000327: 37,2405 73525 PDDL SIN
015991,000328: 37,2406 02403 LATITUDE
015992,000329: 37,2407 74266 VDEF VXSC
015993,000330: 37,2410 36001 OMEG/MS
015994,000331: 37,2411 02405 STORE ERVECTOR
015995,000332: 37,2412 77634 RTB
015996,000333: 37,2413 21574 LOADTIME
015997,000334: 37,2414 26433 STOVL TMARK
015998,000335: 37,2415 37057 SCHZEROS
015999,000336: 37,2416 02564 STORE ERCOMP
016000,000337: 37,2417 77616 RVQ
016001,000338:
016002,000339: 37,2420 47020 EARTHR ITA RTB
016003,000340: 37,2421 00051 S2
016004,000341: 37,2422 21574 LOADTIME
016005,000342: 37,2423 02431 STORE TEMPTIME
016006,000343: 37,2424 51025 DSU BPL
016007,000344: 37,2425 02433 TMARK
016008,000345: 37,2426 76431 ERTHR
016009,000346: 37,2427 77624 CALL
016010,000347: 37,2430 76275 OVERFFIX
016011,000348: 37,2431 74261 ERTHR SL VXSC
016012,000349: 37,2432 20212 9D
016013,000350: 37,2433 02405 ERVECTOR
016014,000351: 37,2434 53321 MXV VAD
016015,000352: 37,2435 02643 XSM
016016,000353: 37,2436 02564 ERCOMP
016017,000354: 37,2437 16564 STODL ERCOMP
016018,000355: 37,2440 02431 TEMPTIME
016019,000356: 37,2441 02433 STORE TMARK
016020,000357: 37,2442 47170 AXT,1 RTB
016021,000358: 37,2443 02563 ECADR ERCOMP
016022,000359: 37,2444 21706 PULSEIMU
016023,000360: 37,2445 77650 GOTO
016024,000361: 37,2446 00051 S2
016025,000362:
016026,000363: 37,2447 00006 EARTHR* EXTEND
016027,000364: 37,2450 23420 QXCH QPLACES
016028,000365: 37,2451 06042 TC INTPRET
016029,000366: 37,2452 77624 CALL
016030,000367: 37,2453 76420 EARTHR
016031,000368: 37,2454 77776 EXIT
016032,000369: 37,2455 02315 TC IMUSLLLG
016033,000370: 37,2456 01420 TC QPLACES
016034,000371:
016035,000372: 37,2457 00006 SHOW EXTEND
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Page 382 |
016037,000374: 37,2460 23417 QXCH QPLACE
016038,000375: 37,2461 31416 SHOW1 CA POSITON
016039,000376: 37,2462 55051 TS DSPTEM2 +2
016040,000377: 37,2463 32472 CA VB06N98
016041,000378: 37,2464 04616 TC BANKCALL
016042,000379: 37,2465 20477 CADR GOFLASH
016043,000380: 37,2466 02270 TC ENDTEST1 # V 34
016044,000381: 37,2467 01417 TC QPLACE # V33
016045,000382: 37,2470 12461 TCF SHOW1
016046,000383:
016047,000384: 37,2471 07626 3990DEC DEC 3990 B-14
016048,000385: 37,2472 01542 VB06N98 VN 0698
016049,000386: 37,2473 01451 VN0641 VN 0641
016050,000387: 37,2474 4361 DEC17 = ND1
016051,000388: 37,2474 00072 DEC58 DEC 58 B-14
016052,000389: 37,2475 02737 OGCPL ECADR OGC
016053,000390: 37,2476 4777 1SECX = 1SEC
016054,000391: 37,2476 01664 XNBADR GENADR XNB
016055,000392: 37,2477 01642 XSMADR GENADR XSM
016056,000393: 4102 BLOCK 2
016057,000394: 4102 COUNT* $$/P07
016058,000395: 4102 00004 FINETIME INHINT # RETURNS WITH INTERRUPT INHIBITED
016059,000396: 4103 00006 EXTEND
016060,000397: 4104 00004 READ LOSCALAR
016061,000398: 4105 54001 TS L
016062,000399: 4106 00006 EXTEND
016063,000400: 4107 06004 RXOR LOSCALAR
016064,000401: 4110 00006 EXTEND
016065,000402: 4111 14115 BZF +4
016066,000403: 4112 00006 EXTEND
016067,000404: 4113 00004 READ LOSCALAR
016068,000405: 4114 54001 TS L
016069,000406: 4115 44733 +4 CS POSMAX
016070,000407: 4116 60001 AD L
016071,000408: 4117 00006 EXTEND
016072,000409: 4120 14103 BZF FINETIME +1
016073,000410: 4121 00006 EXTEND
016074,000411: 4122 00003 READ HISCALAR
016075,000412: 4123 00002 TC Q
016076,000413:
End of include-file IMU_PERFORMANCE_TESTS_2.agc. Parent file is MAIN.agc