1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
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
|
.OPT NO LIST
;
; UPDATE EMUOS.LIS
; Start Emulator
; Insert MAC/65 Cartridge
; ENTER #H5:EMUOS.LIS,A
; ASM,,#H0:EMUOS.OBJ
; Exit Emulator
; mkimg -input emuos.obj -image emuos.img -header emuos.h c000 ffff
;
BOOT = $09
RTCLOK = $12
VVBLKI = $0222
VVBLKD = $0224
;
; ============================
; OS Hardware Shadow Registers
; ============================
;
CHART = $02F3
CHBAS = $02F4
CH = $02FC
COLOR4 = $02C8
COLOR0 = $02C4
COLOR1 = $02C5
COLOR2 = $02C6
COLOR3 = $02C7
PCOLR0 = $02C0
PCOLR1 = $02C1
PCOLR2 = $02C2
PCOLR3 = $02C3
SDLSTH = $0231
SDLSTL = $0230
SDMCTL = $022F
STICK0 = $0278
STICK1 = $0279
STICK2 = $027A
STICK3 = $027B
GPRIOR = $026F
SSKCTL = $0232
STRIG0 = $0284
STRIG1 = $0285
STRIG2 = $0286
STRIG3 = $0287
;
DDEVIC = $0300
DUNIT = $0301
DCOMND = $0302
DSTATS = $0303
DBUFLO = $0304
DBUFHI = $0305
DTIMLO = $0306
DTIMHI = $0307
DBYTLO = $0308
DBYTHI = $0309
DAUX1 = $030A
DAUX2 = $030B
;
; ==================
; Hardware Registers
; ==================
;
CHACTL = $D401
CHBASE = $D409
COLBK = $D01A
COLPF0 = $D016
COLPF1 = $D017
COLPF2 = $D018
COLPF3 = $D019
COLPM0 = $D012
COLPM1 = $D013
COLPM2 = $D014
COLPM3 = $D015
CONSOL = $D01F
DLISTH = $D403
DLISTL = $D402
DMACTL = $D400
KBCODE = $D209
IRQEN = $D20E
IRQST = $D20E
NMIRES = $D40F
NMIST = $D40F
PACTL = $D302
PORTA = $D300
PORTB = $D301
PRIOR = $D01B
SKCTL = $D20F
TRIG0 = $D010
TRIG1 = $D011
TRIG2 = $D012
TRIG3 = $D013
VCOUNT = $D40B
;
*= $E000
.BYTE $00,$00,$00,$00,$00,$00,$00,$00
.BYTE $00,$18,$18,$18,$18,$00,$18,$00
.BYTE $00,$66,$66,$66,$00,$00,$00,$00
.BYTE $00,$66,$FF,$66,$66,$FF,$66,$00
.BYTE $18,$3E,$60,$3C,$06,$7C,$18,$00
.BYTE $00,$66,$6C,$18,$30,$66,$46,$00
.BYTE $1C,$36,$1C,$38,$6F,$66,$3B,$00
.BYTE $00,$18,$18,$18,$00,$00,$00,$00
.BYTE $00,$0E,$1C,$18,$18,$1C,$0E,$00
.BYTE $00,$70,$38,$18,$18,$38,$70,$00
.BYTE $00,$66,$3C,$FF,$3C,$66,$00,$00
.BYTE $00,$18,$18,$7E,$18,$18,$00,$00
.BYTE $00,$00,$00,$00,$00,$18,$18,$30
.BYTE $00,$00,$00,$7E,$00,$00,$00,$00
.BYTE $00,$00,$00,$00,$00,$18,$18,$00
.BYTE $00,$06,$0C,$18,$30,$60,$40,$00
.BYTE $00,$3C,$66,$6E,$76,$66,$3C,$00
.BYTE $00,$18,$38,$18,$18,$18,$7E,$00
.BYTE $00,$3C,$66,$0C,$18,$30,$7E,$00
.BYTE $00,$7E,$0C,$18,$0C,$66,$3C,$00
.BYTE $00,$0C,$1C,$3C,$6C,$7E,$0C,$00
.BYTE $00,$7E,$60,$7C,$06,$66,$3C,$00
.BYTE $00,$3C,$60,$7C,$66,$66,$3C,$00
.BYTE $00,$7E,$06,$0C,$18,$30,$30,$00
.BYTE $00,$3C,$66,$3C,$66,$66,$3C,$00
.BYTE $00,$3C,$66,$3E,$06,$0C,$38,$00
.BYTE $00,$00,$18,$18,$00,$18,$18,$00
.BYTE $00,$00,$18,$18,$00,$18,$18,$30
.BYTE $06,$0C,$18,$30,$18,$0C,$06,$00
.BYTE $00,$00,$7E,$00,$00,$7E,$00,$00
.BYTE $60,$30,$18,$0C,$18,$30,$60,$00
.BYTE $00,$3C,$66,$0C,$18,$00,$18,$00
.BYTE $00,$3C,$66,$6E,$6E,$60,$3E,$00
.BYTE $00,$18,$3C,$66,$66,$7E,$66,$00
.BYTE $00,$7C,$66,$7C,$66,$66,$7C,$00
.BYTE $00,$3C,$66,$60,$60,$66,$3C,$00
.BYTE $00,$78,$6C,$66,$66,$6C,$78,$00
.BYTE $00,$7E,$60,$7C,$60,$60,$7E,$00
.BYTE $00,$7E,$60,$7C,$60,$60,$60,$00
.BYTE $00,$3E,$60,$60,$6E,$66,$3E,$00
.BYTE $00,$66,$66,$7E,$66,$66,$66,$00
.BYTE $00,$7E,$18,$18,$18,$18,$7E,$00
.BYTE $00,$06,$06,$06,$06,$66,$3C,$00
.BYTE $00,$66,$6C,$78,$78,$6C,$66,$00
.BYTE $00,$60,$60,$60,$60,$60,$7E,$00
.BYTE $00,$63,$77,$7F,$6B,$63,$63,$00
.BYTE $00,$66,$76,$7E,$7E,$6E,$66,$00
.BYTE $00,$3C,$66,$66,$66,$66,$3C,$00
.BYTE $00,$7C,$66,$66,$7C,$60,$60,$00
.BYTE $00,$3C,$66,$66,$66,$6C,$36,$00
.BYTE $00,$7C,$66,$66,$7C,$6C,$66,$00
.BYTE $00,$3C,$60,$3C,$06,$06,$3C,$00
.BYTE $00,$7E,$18,$18,$18,$18,$18,$00
.BYTE $00,$66,$66,$66,$66,$66,$7E,$00
.BYTE $00,$66,$66,$66,$66,$3C,$18,$00
.BYTE $00,$63,$63,$6B,$7F,$77,$63,$00
.BYTE $00,$66,$66,$3C,$3C,$66,$66,$00
.BYTE $00,$66,$66,$3C,$18,$18,$18,$00
.BYTE $00,$7E,$0C,$18,$30,$60,$7E,$00
.BYTE $00,$1E,$18,$18,$18,$18,$1E,$00
.BYTE $00,$40,$60,$30,$18,$0C,$06,$00
.BYTE $00,$78,$18,$18,$18,$18,$78,$00
.BYTE $00,$08,$1C,$36,$63,$00,$00,$00
.BYTE $00,$00,$00,$00,$00,$00,$FF,$00
.BYTE $00,$36,$7F,$7F,$3E,$1C,$08,$00
.BYTE $18,$18,$18,$1F,$1F,$18,$18,$18
.BYTE $03,$03,$03,$03,$03,$03,$03,$03
.BYTE $18,$18,$18,$F8,$F8,$00,$00,$00
.BYTE $18,$18,$18,$F8,$F8,$18,$18,$18
.BYTE $00,$00,$00,$F8,$F8,$18,$18,$18
.BYTE $03,$07,$0E,$1C,$38,$70,$E0,$C0
.BYTE $C0,$E0,$70,$38,$1C,$0E,$07,$03
.BYTE $01,$03,$07,$0F,$1F,$3F,$7F,$FF
.BYTE $00,$00,$00,$00,$0F,$0F,$0F,$0F
.BYTE $80,$C0,$E0,$F0,$F8,$FC,$FE,$FF
.BYTE $0F,$0F,$0F,$0F,$00,$00,$00,$00
.BYTE $F0,$F0,$F0,$F0,$00,$00,$00,$00
.BYTE $FF,$FF,$00,$00,$00,$00,$00,$00
.BYTE $00,$00,$00,$00,$00,$00,$FF,$FF
.BYTE $00,$00,$00,$00,$F0,$F0,$F0,$F0
.BYTE $00,$1C,$1C,$77,$77,$08,$1C,$00
.BYTE $00,$00,$00,$1F,$1F,$18,$18,$18
.BYTE $00,$00,$00,$FF,$FF,$00,$00,$00
.BYTE $18,$18,$18,$FF,$FF,$18,$18,$18
.BYTE $00,$00,$3C,$7E,$7E,$7E,$3C,$00
.BYTE $00,$00,$00,$00,$FF,$FF,$FF,$FF
.BYTE $C0,$C0,$C0,$C0,$C0,$C0,$C0,$C0
.BYTE $00,$00,$00,$FF,$FF,$18,$18,$18
.BYTE $18,$18,$18,$FF,$FF,$00,$00,$00
.BYTE $F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0
.BYTE $18,$18,$18,$1F,$1F,$00,$00,$00
.BYTE $78,$60,$78,$60,$7E,$18,$1E,$00
.BYTE $00,$18,$3C,$7E,$18,$18,$18,$00
.BYTE $00,$18,$18,$18,$7E,$3C,$18,$00
.BYTE $00,$18,$30,$7E,$30,$18,$00,$00
.BYTE $00,$18,$0C,$7E,$0C,$18,$00,$00
.BYTE $00,$18,$3C,$7E,$7E,$3C,$18,$00
.BYTE $00,$00,$3C,$06,$3E,$66,$3E,$00
.BYTE $00,$60,$60,$7C,$66,$66,$7C,$00
.BYTE $00,$00,$3C,$60,$60,$60,$3C,$00
.BYTE $00,$06,$06,$3E,$66,$66,$3E,$00
.BYTE $00,$00,$3C,$66,$7E,$60,$3C,$00
.BYTE $00,$0E,$18,$3E,$18,$18,$18,$00
.BYTE $00,$00,$3E,$66,$66,$3E,$06,$7C
.BYTE $00,$60,$60,$7C,$66,$66,$66,$00
.BYTE $00,$18,$00,$38,$18,$18,$3C,$00
.BYTE $00,$06,$00,$06,$06,$06,$06,$3C
.BYTE $00,$60,$60,$6C,$78,$6C,$66,$00
.BYTE $00,$38,$18,$18,$18,$18,$3C,$00
.BYTE $00,$00,$66,$7F,$7F,$6B,$63,$00
.BYTE $00,$00,$7C,$66,$66,$66,$66,$00
.BYTE $00,$00,$3C,$66,$66,$66,$3C,$00
.BYTE $00,$00,$7C,$66,$66,$7C,$60,$60
.BYTE $00,$00,$3E,$66,$66,$3E,$06,$06
.BYTE $00,$00,$7C,$66,$60,$60,$60,$00
.BYTE $00,$00,$3E,$60,$3C,$06,$7C,$00
.BYTE $00,$18,$7E,$18,$18,$18,$0E,$00
.BYTE $00,$00,$66,$66,$66,$66,$3E,$00
.BYTE $00,$00,$66,$66,$66,$3C,$18,$00
.BYTE $00,$00,$63,$6B,$7F,$3E,$36,$00
.BYTE $00,$00,$66,$3C,$18,$3C,$66,$00
.BYTE $00,$00,$66,$66,$66,$3E,$0C,$78
.BYTE $00,$00,$7E,$0C,$18,$30,$7E,$00
.BYTE $00,$18,$3C,$7E,$7E,$18,$3C,$00
.BYTE $18,$18,$18,$18,$18,$18,$18,$18
.BYTE $00,$7E,$78,$7C,$6E,$66,$06,$00
.BYTE $08,$18,$38,$78,$38,$18,$08,$00
.BYTE $10,$18,$1C,$1E,$1C,$18,$10,$00
;
DISKIV = $E450
DSKINV = $E453
CIOV = $E456
SIOV = $E459
SETVBV = $E45C
SYSVBV = $E45F
XITVBV = $E462
SIOINV = $E465
SENDEV = $E468
INTINV = $E46B
CIOINV = $E46E
BLKBDV = $E471
WARMSV = $E474
COLDSV = $E477
RBLOKV = $E47A
CSOPIV = $E47D
;
*= DISKIV
JMP HALT
*= DSKINV
JMP HALT
*= CIOV
JMP HALT
*= SIOV
JMP HALT
*= SETVBV
JMP HALT
*= SYSVBV
JMP HALT
*= XITVBV
JMP XITVBL
*= SIOINV
JMP HALT
*= SENDEV
JMP HALT
*= INTINV
JMP HALT
*= CIOINV
JMP HALT
*= BLKBDV
JMP HALT
*= WARMSV
JMP COLDSTART
*= COLDSV
JMP COLDSTART
*= RBLOKV
JMP HALT
*= CSOPIV
JMP HALT
;
*= $F800
COLDSTART
LDX #$FF
TXS
LDA # <SYSVBL
STA VVBLKI
LDA # >SYSVBL
STA VVBLKI+1
LDA # <XITVBL
STA VVBLKD
LDA # >XITVBL
STA VVBLKD+1
LDA # <IRQ
STA $0216
LDA # >IRQ
STA $0217
LDA $0000
BNE RPIIMG ; Run pre-installed image
LDA $0001
BNE RPIIMG ; Run pre-installed image
LDA $BFFC
INC $BFFC
CMP $BFFC
BNE BOOTDISK
; BNE MONTY
JSR CART.INIT
JMP ($BFFA)
CART.INIT
JMP ($BFFE)
;MONTY
; STA $BFFC ; Restore original value to $BFFC
; JMP $0115 ; Run Montezummas Revenge
RPIIMG
JMP ($0000) ; Run pre-installed image
;
BOOTDISK
LDA #$31
STA DDEVIC
LDA #$01
STA DUNIT
LDA #$52
STA DCOMND
LDA #0
STA DBUFLO
LDA #4
STA DBUFHI
LDA #$80
STA DBYTLO
LDA #$00
STA DBYTHI
LDA #1
STA DAUX1
LDA #0
STA DAUX2
JSR SIOV
BMI HALT
LDA $0400
CMP #$FF
BNE BOOTDISK.1
LDA $0401
CMP #$FF
BEQ BINARY.FILE
BOOTDISK.1
STA 0
CLC
LDA $0402
STA DBUFLO
ADC #6
STA 1
LDA $0403
STA DBUFHI
ADC #0
STA 2
LDA $0404
STA 3
LDA $0405
STA 4
?L1
JSR SIOV
BMI HALT
CLC
LDA DBUFLO
ADC #$80
STA DBUFLO
LDA DBUFHI
ADC #0
STA DBUFHI
INC DAUX1
BNE ?L2
INC DAUX2
?L2
DEC 0
BNE ?L1
DEC 5
BPL ?L1
JSR ?L3 ; Run initialisation code
LDA #1
STA BOOT
JSR ?L4 ; Run main program
RTS
?L3
JMP ($01)
?L4
JMP ($03)
;
BINARY.FILE
;
HALT
LDA # <DLIST
STA SDLSTL
STA DLISTL
LDA # >DLIST
STA SDLSTH
STA DLISTH
LDA #$E0
STA CHBASE
STA CHBAS
LDA #$22
STA DMACTL
STA SDMCTL
LDA #$02
STA CHACTL
STA CHART
LDA #$CA
STA COLBK
STA COLOR4
LDA #$94
STA COLPF2
STA COLOR2
LDA #$0A
STA COLPF1
STA COLOR1
;
HALT2
JMP HALT2
DLIST
.BYTE $70,$70,$70
.BYTE $42, <HALTMSG, >HALTMSG
.BYTE $02,$02,$02,$02,$02
.BYTE $02,$02,$02,$02,$02
.BYTE $02,$02,$02,$02,$02
.BYTE $02,$02,$02,$02,$02
.BYTE $02,$02,$02
.BYTE $41, <DLIST, >DLIST
;
HALTMSG
.SBYTE " Atari800/OS Emulation Halted "
.SBYTE " Copright (c) 1997 David J. Firth "
.SBYTE " "
.SBYTE " E-Mail: david@signus.demon.co.uk "
.SBYTE " http://www.signus.demon.co.uk/david/ "
.SBYTE " "
.SBYTE "Sorry this program needs a real Atari/OS"
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
.SBYTE " "
;
NMI
BIT NMIST
BPL VBI
JMP ($0200)
VBI
PHA
TXA
PHA
TYA
PHA
STA NMIRES
JMP (VVBLKI)
SYSVBL
INC RTCLOK+2
BNE SYSVBL.1
INC RTCLOK+1
BNE SYSVBL.1
INC RTCLOK
SYSVBL.1
LDA SDMCTL
STA DMACTL
LDA SDLSTL
STA DLISTL
LDA SDLSTH
STA DLISTH
LDA COLOR4
STA COLBK
LDA COLOR0
STA COLPF0
LDA COLOR1
STA COLPF1
LDA COLOR2
STA COLPF2
LDA COLOR3
STA COLPF3
LDA PCOLR0
STA COLPM0
LDA PCOLR1
STA COLPM1
LDA PCOLR2
STA COLPM2
LDA PCOLR3
STA COLPM3
LDA CHART
STA CHACTL
LDA CHBAS
STA CHBASE
LDA PORTA
AND #$0F
STA STICK0
LDA PORTA
ASL A
ASL A
ASL A
ASL A
STA STICK1
LDA PORTB
AND #$0F
STA STICK2
LDA PORTB
ASL A
ASL A
ASL A
ASL A
STA STICK3
LDA GPRIOR
STA PRIOR
LDA SSKCTL
STA SKCTL
LDA TRIG0
STA STRIG0
LDA TRIG1
STA STRIG1
LDA TRIG2
STA STRIG2
LDA TRIG3
STA STRIG3
JMP (VVBLKD)
XITVBL
PLA
TAY
PLA
TAX
PLA
IRQ.VECTOR
JMP ($0216)
IRQ
PHA
LDA IRQST ; Get Interrupt Status
AND #$40
BNE IRQ.EXIT
LDA KBCODE
STA CH
IRQ.EXIT
PLA
RTI
;
*= $FFFA
.WORD NMI
*= $FFFC
.WORD COLDSTART
*= $FFFE
.WORD IRQ.VECTOR
|
