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Commit | Line | Data |
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1 | page 255\r | |
2 | .z80\r | |
3 | \r | |
4 | extrn ddtz,bpent\r | |
5 | extrn $stack\r | |
6 | extrn charini,?const,?conin\r | |
7 | extrn ?cono,?conos\r | |
8 | \r | |
9 | extrn romend\r | |
10 | \r | |
11 | global iobyte\r | |
12 | global isv_sw\r | |
13 | \r | |
14 | include config.inc\r | |
15 | \r | |
16 | \r | |
17 | \r | |
18 | \r | |
19 | ;----------------------------------------------------------------------\r | |
20 | \r | |
21 | cseg\r | |
22 | romstart equ $\r | |
23 | \r | |
24 | org romstart+0\r | |
25 | jp start\r | |
26 | \r | |
27 | iobyte: db 0\r | |
28 | \r | |
29 | ; restart vectors\r | |
30 | \r | |
31 | rsti defl 1\r | |
32 | rept 7\r | |
33 | \r | |
34 | org 8*rsti + romstart\r | |
35 | jp bpent\r | |
36 | rsti defl rsti+1\r | |
37 | endm\r | |
38 | \r | |
39 | ;----------------------------------------------------------------------\r | |
40 | \r | |
41 | org romstart+40h\r | |
42 | \r | |
43 | dw 0\r | |
44 | db 0\r | |
45 | \r | |
46 | cseg\r | |
47 | \r | |
48 | if ROMSYS\r | |
49 | $crom: defb c$rom ;\r | |
50 | else\r | |
51 | db 0 ;\r | |
52 | endif\r | |
53 | \r | |
54 | \r | |
55 | hwini0:\r | |
56 | db 0 ;count\r | |
57 | ; db rcr,CREFSH ;configure DRAM refresh\r | |
58 | ; db dcntl,INIWAITS ;wait states\r | |
59 | ; db cbar,SYS$CBAR\r | |
60 | \r | |
61 | \r | |
62 | ;----------------------------------------------------------------------\r | |
63 | \r | |
64 | org romstart+50h\r | |
65 | \r | |
66 | start:\r | |
67 | jp cstart\r | |
68 | jp wstart\r | |
69 | jp ?const\r | |
70 | jp ?conin\r | |
71 | jp ?cono\r | |
72 | jp ?conos\r | |
73 | jp charini\r | |
74 | \r | |
75 | cstart:\r | |
76 | di\r | |
77 | \r | |
78 | xor a\r | |
79 | ld (@cbnk),a\r | |
80 | \r | |
81 | ; search warm start mark\r | |
82 | \r | |
83 | ld ix,mark_55AA ; top of common area\r | |
84 | ld a,0aah ;\r | |
85 | cp (ix+000h) ;\r | |
86 | jr nz,kstart ;\r | |
87 | cp (ix+002h) ;\r | |
88 | jr nz,kstart ;\r | |
89 | cpl ;\r | |
90 | cp (ix+001h) ;\r | |
91 | jr nz,kstart ;\r | |
92 | cp (ix+003h) ;\r | |
93 | jr nz,kstart ;\r | |
94 | ld sp,$stack ; mark found, check\r | |
95 | ; call checkcrc_alv ;\r | |
96 | jp z,wstart ; check ok,\r | |
97 | \r | |
98 | ;\r | |
99 | ; ram not ok, initialize -- kstart --\r | |
100 | \r | |
101 | kstart:\r | |
102 | ld sp,$stack ;01e1\r | |
103 | \r | |
104 | ; Clear RAM \r | |
105 | \r | |
106 | ; Init bank manager\r | |
107 | \r | |
108 | ;----------------------------------------------------------------------\r | |
109 | ;\r | |
110 | \r | |
111 | ld hl,055AAh ;set warm start mark\r | |
112 | ld (mark_55AA),hl ;\r | |
113 | ld (mark_55AA+2),hl;\r | |
114 | \r | |
115 | ;\r | |
116 | ; -- wstart --\r | |
117 | ;\r | |
118 | wstart:\r | |
119 | call sysram_init ;027f\r | |
120 | call ivtab_init\r | |
121 | \r | |
122 | call charini\r | |
123 | call bufferinit\r | |
124 | \r | |
125 | ld c,0\r | |
126 | call selbnk\r | |
127 | \r | |
128 | \r | |
129 | im 2 ;?030e\r | |
130 | ei ;0282\r | |
131 | \r | |
132 | call ?const ;0284\r | |
133 | call ?const ;0287\r | |
134 | or a ;028a\r | |
135 | call nz,?conin ;028d\r | |
136 | \r | |
137 | ;;; ld a,(banktab) ;\r | |
138 | ;;; ld e,a ;\r | |
139 | jp ddtz ;0290\r | |
140 | \r | |
141 | \r | |
142 | ;----------------------------------------------------------------------\r | |
143 | ;\r | |
144 | \r | |
145 | ;TODO: Make a ringbuffer module.\r | |
146 | \r | |
147 | global buf.init\r | |
148 | \r | |
149 | buf.init:\r | |
150 | ld (ix+o.in_idx),0\r | |
151 | ld (ix+o.out_idx),0\r | |
152 | ld (ix+o.mask),a\r | |
153 | ret\r | |
154 | \r | |
155 | ;----------------------------------------------------------------------\r | |
156 | \r | |
157 | \r | |
158 | extrn msginit,msg.sout\r | |
159 | extrn mtx.fifo,mrx.fifo\r | |
160 | extrn co.fifo,ci.fifo\r | |
161 | \r | |
162 | \r | |
163 | bufferinit:\r | |
164 | call msginit\r | |
165 | \r | |
166 | ld hl,buffers\r | |
167 | ld b,buftablen\r | |
168 | bfi_1:\r | |
169 | ld a,(hl)\r | |
170 | inc hl\r | |
171 | ld (bufdat+0),a\r | |
172 | ld e,(hl)\r | |
173 | inc hl\r | |
174 | ld d,(hl)\r | |
175 | inc hl\r | |
176 | ex de,hl\r | |
177 | \r | |
178 | or a\r | |
179 | jr nz,bfi_2\r | |
180 | \r | |
181 | ld a,(@cbnk)\r | |
182 | call bnk2phys\r | |
183 | \r | |
184 | ld (40h+0),hl\r | |
185 | ld (40h+2),a\r | |
186 | out (AVRINT5),a\r | |
187 | jr bfi_3\r | |
188 | bfi_2:\r | |
189 | \r | |
190 | ld a,(@cbnk)\r | |
191 | call bnk2phys\r | |
192 | \r | |
193 | ld (bufdat+1),hl\r | |
194 | ld (bufdat+3),a\r | |
195 | ld hl,inimsg\r | |
196 | call msg.sout\r | |
197 | bfi_3:\r | |
198 | ex de,hl\r | |
199 | djnz bfi_1\r | |
200 | ret\r | |
201 | \r | |
202 | \r | |
203 | buffers:\r | |
204 | db 0\r | |
205 | dw mtx.fifo\r | |
206 | db 1\r | |
207 | dw mrx.fifo\r | |
208 | db 2\r | |
209 | dw co.fifo\r | |
210 | db 3\r | |
211 | dw ci.fifo\r | |
212 | buftablen equ ($ - buffers)/3\r | |
213 | \r | |
214 | inimsg:\r | |
215 | db inimsg_e - $ -1\r | |
216 | db 0AEh\r | |
217 | db inimsg_e - $ -1\r | |
218 | db 0\r | |
219 | bufdat:\r | |
220 | db 0\r | |
221 | dw 0\r | |
222 | db 0\r | |
223 | inimsg_e:\r | |
224 | \r | |
225 | \r | |
226 | ;\r | |
227 | ;----------------------------------------------------------------------\r | |
228 | ;\r | |
229 | \r | |
230 | bnk2phys:\r | |
231 | sla h\r | |
232 | jr nc,b2p_1 ;A15=1 --> common\r | |
233 | ld a,3\r | |
234 | b2p_1:\r | |
235 | srl a\r | |
236 | rr h\r | |
237 | ret\r | |
238 | \r | |
239 | ;\r | |
240 | ;----------------------------------------------------------------------\r | |
241 | ;\r | |
242 | \r | |
243 | sysram_init:\r | |
244 | ld hl,sysramw\r | |
245 | ld de,topcodsys\r | |
246 | ld bc,sysrame-sysramw\r | |
247 | ldir\r | |
248 | \r | |
249 | ret\r | |
250 | \r | |
251 | ;----------------------------------------------------------------------\r | |
252 | \r | |
253 | ivtab_init:\r | |
254 | ld hl,ivtab ;\r | |
255 | ld a,h ;\r | |
256 | ld i,a ;\r | |
257 | ; out0 (il),l ;\r | |
258 | \r | |
259 | ; Let all vectors point to spurious int routines.\r | |
260 | \r | |
261 | ld d,high sp.int0\r | |
262 | ld a,low sp.int0\r | |
263 | ld b,9\r | |
264 | ivt_i1:\r | |
265 | ld (hl),a\r | |
266 | inc l\r | |
267 | ld (hl),d\r | |
268 | inc l\r | |
269 | add a,sp.int.len\r | |
270 | djnz ivt_i1\r | |
271 | ret\r | |
272 | \r | |
273 | ;----------------------------------------------------------------------\r | |
274 | ;\r | |
275 | \r | |
276 | global io.ini\r | |
277 | \r | |
278 | io.ini:\r | |
279 | push bc\r | |
280 | \r | |
281 | if CPU_Z180\r | |
282 | \r | |
283 | ld b,0 ;high byte port adress\r | |
284 | ld a,(hl) ;count\r | |
285 | inc hl\r | |
286 | or a\r | |
287 | jr z,ioi_e\r | |
288 | ioi_1:\r | |
289 | ld c,(hl) ;port address\r | |
290 | inc hl\r | |
291 | outi\r | |
292 | inc b ;outi decrements b\r | |
293 | dec a\r | |
294 | jr nz,ioi_1\r | |
295 | \r | |
296 | else\r | |
297 | jr ioi_nxt\r | |
298 | ioi_l:\r | |
299 | ld c,(hl) ;port address\r | |
300 | inc hl\r | |
301 | otir\r | |
302 | ioi_nxt:\r | |
303 | ld b,(hl) ;count\r | |
304 | inc hl\r | |
305 | inc b\r | |
306 | djnz ioi_l\r | |
307 | endif\r | |
308 | ioi_e: \r | |
309 | pop bc\r | |
310 | ret\r | |
311 | \r | |
312 | if CPU_Z180\r | |
313 | io.ini.m:\r | |
314 | push bc\r | |
315 | ld b,(hl)\r | |
316 | inc hl\r | |
317 | ld c,(hl)\r | |
318 | inc hl\r | |
319 | otimr\r | |
320 | pop bc\r | |
321 | ret\r | |
322 | endif\r | |
323 | \r | |
324 | io.ini.l:\r | |
325 | ;\r | |
326 | \r | |
327 | \r | |
328 | ;----------------------------------------------------------------------\r | |
329 | ;\r | |
330 | ;return:\r | |
331 | ; hl = hl + a\r | |
332 | ; Flags undefined\r | |
333 | ;\r | |
334 | \r | |
335 | add_hl_a:\r | |
336 | add a,l\r | |
337 | ld l,a\r | |
338 | ret nc\r | |
339 | inc h\r | |
340 | ret\r | |
341 | \r | |
342 | ; ---------------------------------------------------------\r | |
343 | \r | |
344 | sysramw:\r | |
345 | \r | |
346 | .phase isvsw_loc\r | |
347 | topcodsys:\r | |
348 | \r | |
349 | ; Trampoline for interrupt routines in banked ram.\r | |
350 | ; Switch stack pointer to "system" stack in top ram\r | |
351 | \r | |
352 | ; todo: z80 bank switch\r | |
353 | \r | |
354 | isv_sw: ;\r | |
355 | ex (sp),hl ; save hl, return adr in hl\r | |
356 | push de ;\r | |
357 | push af ;\r | |
358 | ex de,hl ;\r | |
359 | ld hl,0 ;\r | |
360 | add hl,sp ;\r | |
361 | ld a,h ;\r | |
362 | cp 0f8h ;\r | |
363 | jr nc,isw_1 ;\r | |
364 | ld sp,$stack ;\r | |
365 | isw_1:\r | |
366 | push hl ;\r | |
367 | ; save current bank\r | |
368 | ; in0 h,(cbar) ;\r | |
369 | push hl ;\r | |
370 | ; switch to system bank\r | |
371 | ; ld a,SYS$CBAR ;\r | |
372 | ; out0 (cbar),a ; \r | |
373 | ex de,hl ;\r | |
374 | ld e,(hl) ;\r | |
375 | inc hl ;\r | |
376 | ld d,(hl) ;\r | |
377 | ex de,hl ;\r | |
378 | push bc ;\r | |
379 | call jphl ;\r | |
380 | \r | |
381 | pop bc ;\r | |
382 | pop hl ; restore bank\r | |
383 | ; out0 (cbar),h ;\r | |
384 | pop hl ;\r | |
385 | ld sp,hl ;\r | |
386 | pop af ;\r | |
387 | pop de ;\r | |
388 | pop hl ;\r | |
389 | ei ;\r | |
390 | ret ;\r | |
391 | jphl:\r | |
392 | jp (hl) ;\r | |
393 | \r | |
394 | ; ---------------------------------------------------------\r | |
395 | \r | |
396 | sp.int0:\r | |
397 | ld a,0d0h\r | |
398 | jr sp.i.1\r | |
399 | sp.int.len equ $-sp.int0\r | |
400 | ld a,0d1h\r | |
401 | jr sp.i.1\r | |
402 | ld a,0d2h\r | |
403 | jr sp.i.1\r | |
404 | ld a,0d3h\r | |
405 | jr sp.i.1\r | |
406 | ld a,0d4h\r | |
407 | jr sp.i.1\r | |
408 | ld a,0d5h\r | |
409 | jr sp.i.1\r | |
410 | ld a,0d6h\r | |
411 | jr sp.i.1\r | |
412 | ld a,0d7h\r | |
413 | jr sp.i.1\r | |
414 | ld a,0d8h\r | |
415 | sp.i.1:\r | |
416 | ; out (80h),a\r | |
417 | halt\r | |
418 | \r | |
419 | ; ---------------------------------------------------------\r | |
420 | \r | |
421 | ; Get IFF2\r | |
422 | ; This routine may not be loaded in page zero\r | |
423 | ;\r | |
424 | ; return Carry clear, if INTs are enabled.\r | |
425 | ;\r | |
426 | global getiff\r | |
427 | getiff:\r | |
428 | xor a ;clear accu and carry\r | |
429 | push af ;stack bottom := 00xxh\r | |
430 | pop af\r | |
431 | ld a,i ;P flag := IFF2\r | |
432 | ret pe ;exit carry clear, if enabled\r | |
433 | dec sp\r | |
434 | dec sp ;has stack bottom been overwritten?\r | |
435 | pop af\r | |
436 | and a ;if not 00xxh, INTs were\r | |
437 | ret nz ;actually enabled\r | |
438 | scf ;Otherwise, they really are disabled\r | |
439 | ret\r | |
440 | \r | |
441 | ;----------------------------------------------------------------------\r | |
442 | \r | |
443 | global selbnk\r | |
444 | \r | |
445 | ; a: bank (0..2)\r | |
446 | \r | |
447 | selbnk:\r | |
448 | push bc\r | |
449 | ld c,a\r | |
450 | call getiff\r | |
451 | push af\r | |
452 | \r | |
453 | ld a,c\r | |
454 | di\r | |
455 | ld (@cbnk),a\r | |
456 | ld a,5\r | |
457 | out (SIOAC),a\r | |
458 | ld a,(mm_sio0)\r | |
459 | rla\r | |
460 | srl c\r | |
461 | rra\r | |
462 | out (SIOAC),a\r | |
463 | ld (mm_sio0),a\r | |
464 | \r | |
465 | ld a,5\r | |
466 | out (SIOBC),a\r | |
467 | ld a,(mm_sio1)\r | |
468 | rla\r | |
469 | srl c\r | |
470 | rra\r | |
471 | out (SIOBC),a\r | |
472 | ld (mm_sio1),a\r | |
473 | pop af\r | |
474 | pop bc\r | |
475 | ret c ;INTs were disabled\r | |
476 | ei\r | |
477 | ret\r | |
478 | \r | |
479 | ;----------------------------------------------------------------------\r | |
480 | \r | |
481 | ; c: bank (0..2)\r | |
482 | \r | |
483 | if 0\r | |
484 | \r | |
485 | selbnk:\r | |
486 | ld a,(@cbnk)\r | |
487 | xor c\r | |
488 | and 3\r | |
489 | ret z ;no change\r | |
490 | \r | |
491 | call getiff\r | |
492 | push af\r | |
493 | ld a,c\r | |
494 | di\r | |
495 | ld (@cbnk),a\r | |
496 | ld a,5\r | |
497 | out (SIOAC),a\r | |
498 | ld a,(mm_sio0)\r | |
499 | rla\r | |
500 | srl c\r | |
501 | rra\r | |
502 | out (SIOAC),a\r | |
503 | ld (mm_sio0),a\r | |
504 | \r | |
505 | ld a,5\r | |
506 | out (SIOBC),a\r | |
507 | ld a,(mm_sio1)\r | |
508 | rla\r | |
509 | srl c\r | |
510 | rra\r | |
511 | out (SIOBC),a\r | |
512 | ld (mm_sio1),a\r | |
513 | pop af\r | |
514 | ret nc ;INTs were disabled\r | |
515 | ei\r | |
516 | ret\r | |
517 | \r | |
518 | endif\r | |
519 | \r | |
520 | ;----------------------------------------------------------------------\r | |
521 | \r | |
522 | if 0\r | |
523 | ex af,af'\r | |
524 | push af\r | |
525 | ex af,af'\r | |
526 | \r | |
527 | rra\r | |
528 | jr nc,stbk1\r | |
529 | ex af,af'\r | |
530 | ld a,5\r | |
531 | out (SIOAC),a\r | |
532 | ld a,(mm_sio0)\r | |
533 | rla\r | |
534 | srl c\r | |
535 | rra\r | |
536 | out (SIOAC),a\r | |
537 | ld (mm_sio1),a\r | |
538 | ex af,af'\r | |
539 | \r | |
540 | stbk1:\r | |
541 | rra\r | |
542 | jr nc,stbk2\r | |
543 | ex af,af'\r | |
544 | ld a,5\r | |
545 | out (SIOBC),a\r | |
546 | ld a,(mm_sio1)\r | |
547 | rla\r | |
548 | srl c\r | |
549 | rra\r | |
550 | out (SIOBC),a\r | |
551 | ld (mm_sio1),a\r | |
552 | ex af,af'\r | |
553 | \r | |
554 | stbk2:\r | |
555 | endif\r | |
556 | \r | |
557 | global @cbnk\r | |
558 | global mm_sio0, mm_sio1\r | |
559 | \r | |
560 | @cbnk: db 0 ; current bank (0..2)\r | |
561 | mm_sio0:\r | |
562 | ds 1\r | |
563 | mm_sio1:\r | |
564 | ds 1\r | |
565 | \r | |
566 | ;----------------------------------------------------------------------\r | |
567 | \r | |
568 | curph defl $\r | |
569 | .dephase\r | |
570 | sysrame:\r | |
571 | .phase curph\r | |
572 | tim_ms: db 0\r | |
573 | tim_s: dw 0\r | |
574 | .dephase\r | |
575 | \r | |
576 | ;-----------------------------------------------------\r | |
577 | \r | |
578 | cseg\r | |
579 | \r | |
580 | ;.phase 0ffc0h\r | |
581 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
582 | ;.dephase\r | |
583 | \r | |
584 | ;.phase 0fffch\r | |
585 | mark_55AA equ 0fffch\r | |
586 | ;ds 4 ; 0fffch\r | |
587 | ;.dephase\r | |
588 | \r | |
589 | \r | |
590 | end\r | |
591 | \r |