Atari 400 Technical Reference Manual page 272

ERR LINE ADDR B1 B2 B3 B4
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
030C
030E
030F
0310
0312
0314
0315
0316
0317
0318
0319
031A
0021
0340
0341
0342
0343
0344
0345
0346
0347
0348
0349
034A
034B
034C
0350
03CO
03E8
03FD
0480
i
6500 ASSEMBLER VER 1.0MR
i
INITIAL TIMER VALUE
iADDITION CORRECTION
iCASSETTE MODE WHEN SET
PAGE 11
TIMER1: .RES
ADDCOR: .RES
CASFLG: .RES
TIMER2: .RES
2
1
1
2
iFINAL TIMER VALUE. THESE TWO TIMER VALUES
i
ARE USED TO
TEMP1: . RES
TEMP2: . RES
TEMP3: . RES
SAVIO: . RES
TIMFLG: .RES
STACKP: .RES
TSTAT: . RES
HATABS: .RES
MAXDEV
=
COMPUTE
2
1
1
1
1
1
1
INTERVAL FOR BAUD RATE
iTEMPORARV STORAGE REGISTER
iTEMPORARV STORAGE REGISTER
iTEMPORARV STORAGE REGISTER
iSAVE SERIAL IN DATA PORT
iTIME OUT FLAG FOR BAUD RATE CORRECTION
iSIO STACK POINTER SAVE CELL
iTEMPORARV STATUS HOLDER
38 iHANDLER ADDRESS TABLE
*-HATABS-5 iMAXIMUM HANDLER ADDRESS INDEX
NOTE THE ENTIRE IOCB DEFINITIONS HAVE BEEN MODIFIED
IOCB:
ICHID:
ICDNO:
IeCOM:
ICSTA:
ICBAL:
ICBAH:
ICPTL:
ICPTH:
ICBLL:
ICBLH:
ICAX1:
ICAX2:
ICSPR:
.ORG
. RES
. RES
.RES
. RES
. RES
. RES
.RES
. RES
.RES
. RES
. RES
.RES
. RES
. RES
PRNBUF: .RES
. RES
*
1
1
1
1
1
1
1
1
1
1
1
1
i
1/0
CONTROL BLOCKS
iHANDLER INDEX NUMBER (FF
=
IOCB FREE)
iDEVICE NUMBER (DRIVE NUMBER)
iCOMMAND CODE
iSTATUS OF LAST IOCB ACTION
iBUFFER ADDRESS LOW BYTE
iPUT BYTE ROUTINE ADDRESS - 1
iBUFFER LENGTH LOW BYTE
iAUXILIARY INFORMATION FIRST BYTE
4 i FOUR SPARE BYTES
MAXIOC-IOCBSZ
40 iPRINTER BUFFER
21 iSPARE BVTES
PAGE FOUR RAM ASSIGNMENTS
CASBUF: .RES
131
iCASSETTE BUFFER
i USER AREA STARTS HERE AND GOES TO END OF PAGE FIVE
USAREA: .RES 128 iSPARE