A formal description of SYSTEM/360

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~~MCIE, machine check interruption entry system program0 A V/f 0h, + 1 1-+ CPU; 26 2e, + 1 3DELAY (4 to 1 microsecond) 1e3 + 0 5fi1~~(16) (I6) 6DIAGNOSE 7MAC'(128, m6, s, g; cpustatusl 8h,,gotf + F h,,9EIE, external interruption entry system program1h, t V /timer alarm, console interrupt, external signals 00 : go A (h = 3) - 1p,~n(~n) + @), timer alarna, console interrupt, externalsignals 2timer alarm, console interrupt, external signals +- 36(timer alarm, console interrupt, external signals) A jj,21(g)go 4- 0 4ES, external signals system programd external signals +-(w6/E3) V external signalsTU, timer3update system program= 0: tick A (manual light = <strong>of</strong>f) A (rate sw = process) A 0(-e2 A n3 = a13)MAC'(80, 4, f , g; j) 1k t (32) T (1 j ) - 2' X 300 f timer frepuency 2MAC8@0, 4, s, g; k) 3timer alarm + timer alarm V (I k) > I j 4tick c 0 5T, timer system programDELAY ((I + timerfrequency) seconds) 0tick + 1 1RESET, reset defined operation- - ..+ f, g, h, 9, r, w + 0operating ipl +- state, stop, 0 1"-f CPU; 35 2-+ (CHo,,-CH', CH2, CH3, CH5 CH'); CH', 2 3-+ IPL; 0 4load light + <strong>of</strong>f 5MODEL-DEPENDENT RESET 6
CPU, central processing unit svstem program.lPLEBET-EC123456789101112131415161718192021222324252627282930b313233343536
Page 1:
All SYSTEM/~~O functional character
Page 6 and 7:
example, 'J, in line 20 of MAC' (j;
Page 8 and 9:
used for the instructions as well a
Page 10 and 11:
this respecifies the instruction co
Page 12 and 13: ~The first 2’’ bytes of memory
Page 14 and 15: Indications of machine failure are
Page 16 and 17: TS (test and set) simply fetches on
Page 18 and 19: is suppressed (f12) by a protection
Page 20 and 21: in the case of ZAP (zero and add) a
Page 22 and 23: Input/outputThe SYSTEM/B~O input/ou
Page 24 and 25: one device and the initiation of a
Page 26 and 27: multiplexor channel it could be any
Page 28 and 29: code in C” (line 27). The pci bit
Page 30 and 31: channel operation as any other stat
Page 32 and 33: ~register os/s" (line 45), acknowle
Page 34 and 35: and Si = 1 is used to denote a pend
Page 36 and 37: In line 121 a multiplexor channel s
Page 38 and 39: mand chaining. Alternatively, the b
Page 40 and 41: Iithas no effect on a current opera
Page 42 and 43: for assistance in the early stages;
Page 44 and 45: EX "TM --DCT DCTR --BAL DALR --BCR
Page 48 and 49: MI'CrEDEDMK "EDMKEDEDYVN YVZTR MVCg
Page 50 and 51: AP CP DPMP BPZAPCVBCVBCPz;}BPMPDPAP
Page 52 and 53: k45k46k47k48k49k50k51k52k53k54k55k5
Page 54 and 55: Table 3 Continuedsymboldimensionsig
Page 56 and 57: dimensionsignijicancereferences: se
Page 58 and 59: Table 3Continuedsymboldimensionsign
Page 60 and 61: ~~~~~~~~~~I0 1 2 3 4 5 6 7 8 910 In
Page 64 and 65: (=Ti, qi +- 1, -v/q 0-. -i : (qrand
Page 66: C h d saivpa8:Ks;s;EMmpx ? 1 I&I ?
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A formal description of SYSTEM/360

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