]>
Commit | Line | Data |
---|---|---|
a16ba2b0 L |
1 | page 255\r |
2 | .z80\r | |
3 | \r | |
4 | extrn ddtz,bpent\r | |
5 | extrn $stack\r | |
30d1329e | 6 | extrn charini,?const,?conin\r |
8df5b655 | 7 | extrn ?cono,?conos\r |
a16ba2b0 L |
8 | extrn romend\r |
9 | \r | |
10 | \r | |
64cc2207 | 11 | global iobyte\r |
a16ba2b0 L |
12 | global isv_sw\r |
13 | \r | |
14 | include config.inc\r | |
fecee241 L |
15 | if CPU_Z180\r |
16 | include z180reg.inc\r | |
17 | include z180.lib\r | |
18 | endif\r | |
815c1735 | 19 | \r |
a16ba2b0 L |
20 | \r |
21 | \r | |
22 | \r | |
23 | ;----------------------------------------------------------------------\r | |
24 | \r | |
25 | cseg\r | |
8df5b655 | 26 | romstart equ $\r |
a16ba2b0 | 27 | \r |
8df5b655 | 28 | org romstart+0\r |
815c1735 | 29 | jp start\r |
a16ba2b0 | 30 | \r |
64cc2207 L |
31 | iobyte: db 2\r |
32 | \r | |
a16ba2b0 L |
33 | ; restart vectors\r |
34 | \r | |
35 | rsti defl 1\r | |
36 | rept 7\r | |
8df5b655 | 37 | org 8*rsti + romstart\r |
fecee241 L |
38 | jp bpent\r |
39 | rsti defl rsti+1\r | |
a16ba2b0 L |
40 | endm\r |
41 | \r | |
42 | ;----------------------------------------------------------------------\r | |
fecee241 L |
43 | ; Config space\r |
44 | ;\r | |
45 | \r | |
8df5b655 | 46 | org romstart+40h\r |
349c01b1 L |
47 | \r |
48 | dw 0\r | |
49 | db 0\r | |
50 | \r | |
a16ba2b0 | 51 | \r |
fecee241 L |
52 | if ROMSYS\r |
53 | $crom: defb c$rom ;\r | |
54 | else\r | |
55 | db 0 ;\r | |
56 | endif\r | |
a16ba2b0 | 57 | \r |
8df5b655 | 58 | INIWAITS defl CWAITIO\r |
fecee241 | 59 | if ROMSYS\r |
8df5b655 | 60 | INIWAITS defl INIWAITS+CWAITROM\r |
fecee241 | 61 | endif\r |
8df5b655 L |
62 | \r |
63 | ;----------------------------------------------------------------------\r | |
64 | \r | |
65 | org romstart+50h\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 | ;----------------------------------------------------------------------\r | |
76 | \r | |
fecee241 L |
77 | hwini0:\r |
78 | if CPU_Z180\r | |
fecee241 L |
79 | db 3 ;count\r |
80 | db rcr,CREFSH ;configure DRAM refresh\r | |
81 | db dcntl,INIWAITS ;wait states\r | |
5f7f3586 | 82 | db cbr,SYS$CBR\r |
fecee241 | 83 | db cbar,SYS$CBAR\r |
fecee241 | 84 | endif\r |
2fe44122 | 85 | db 0\r |
fecee241 L |
86 | \r |
87 | if CPU_Z180\r | |
a16ba2b0 L |
88 | dmclrt: ;clear ram per dma\r |
89 | db dmct_e-dmclrt-2 ;\r | |
90 | db sar0l ;first port\r | |
815c1735 | 91 | dw nullbyte ;src (fixed)\r |
a16ba2b0 L |
92 | nullbyte:\r |
93 | db 000h ;src\r | |
94 | dw romend ;dst (inc), start after "rom" code\r | |
95 | db 00h ;dst\r | |
96 | dw 0-romend ;count (64k)\r | |
97 | dmct_e:\r | |
2fe44122 | 98 | db 0\r |
fecee241 L |
99 | endif\r |
100 | \r | |
a16ba2b0 | 101 | \r |
8df5b655 | 102 | cstart:\r |
fecee241 | 103 | if CPU_Z180\r |
a16ba2b0 | 104 | \r |
30d1329e L |
105 | push af\r |
106 | in0 a,(itc) ;Illegal opcode trap?\r | |
107 | jp m,??st01\r | |
108 | ld a,i ;I register == 0 ?\r | |
fecee241 | 109 | jr z,hw_reset ; yes, harware reset\r |
a16ba2b0 L |
110 | \r |
111 | ??st01:\r | |
fecee241 | 112 | ; TODO: SYS$CBR\r |
30d1329e L |
113 | ld a,(syscbr)\r |
114 | out0 (cbr),a\r | |
115 | pop af ;restore registers\r | |
30d1329e | 116 | jp bpent ;\r |
a16ba2b0 | 117 | \r |
fecee241 | 118 | hw_reset:\r |
a16ba2b0 L |
119 | di ;0058\r |
120 | ld a,CREFSH\r | |
121 | out0 (rcr),a ; configure DRAM refresh\r | |
122 | ld a,CWAITIO\r | |
123 | out0 (dcntl),a ; wait states\r | |
124 | \r | |
815c1735 L |
125 | ld a,M_NCD ;No Clock Divide\r |
126 | out0 (ccr),a\r | |
bad2d92d L |
127 | ; ld a,M_X2CM ;X2 Clock Multiplier\r |
128 | ; out0 (cmr),a\r | |
fecee241 | 129 | else\r |
8df5b655 L |
130 | di\r |
131 | xor a\r | |
132 | ld (@cbnk),a\r | |
fecee241 | 133 | endif\r |
815c1735 | 134 | \r |
fecee241 | 135 | ; check warm start mark\r |
a16ba2b0 | 136 | \r |
8df5b655 L |
137 | ld ix,mark_55AA ; top of common area\r |
138 | ld a,0aah ;\r | |
139 | cp (ix+000h) ;\r | |
140 | jr nz,kstart ;\r | |
141 | cp (ix+002h) ;\r | |
142 | jr nz,kstart ;\r | |
143 | cpl ;\r | |
144 | cp (ix+001h) ;\r | |
145 | jr nz,kstart ;\r | |
146 | cp (ix+003h) ;\r | |
147 | jr nz,kstart ;\r | |
148 | ld sp,$stack ; mark found, check\r | |
149 | jp z,wstart ; check ok,\r | |
fecee241 | 150 | \r |
a16ba2b0 L |
151 | ; ram not ok, initialize -- kstart --\r |
152 | \r | |
153 | kstart:\r | |
fecee241 | 154 | if CPU_Z180\r |
fecee241 | 155 | ld a,SYS$CBR\r |
8df5b655 | 156 | out0 (cbr),a\r |
5f7f3586 L |
157 | ld a,SYS$CBAR\r |
158 | out0 (cbar),a\r | |
fecee241 | 159 | endif\r |
a16ba2b0 | 160 | \r |
a16ba2b0 | 161 | ld sp,$stack ;01e1\r |
815c1735 | 162 | \r |
a16ba2b0 L |
163 | ; Clear RAM using DMA0\r |
164 | \r | |
fecee241 L |
165 | if CPU_Z180\r |
166 | if 0\r | |
cdc4625b | 167 | \r |
a16ba2b0 | 168 | ld hl,dmclrt ;load DMA registers\r |
2fe44122 | 169 | call ioiniml\r |
a16ba2b0 L |
170 | ld a,0cbh ;01ef dst +1, src fixed, burst\r |
171 | out0 (dmode),a ;01f1\r | |
172 | \r | |
173 | ld b,512/64\r | |
815c1735 | 174 | ld a,062h ;01f4 enable dma0,\r |
a16ba2b0 L |
175 | ??cl_1:\r |
176 | out0 (dstat),a ;01f9 clear (up to) 64k\r | |
177 | djnz ??cl_1 ; end of RAM?\r | |
cdc4625b | 178 | \r |
fecee241 L |
179 | endif\r |
180 | endif\r | |
a16ba2b0 L |
181 | \r |
182 | ld hl,055AAh ;set warm start mark\r | |
fecee241 L |
183 | ld (mark_55AA),hl\r |
184 | ld (mark_55AA+2),hl\r | |
185 | \r | |
186 | ; -- wstart --\r | |
a16ba2b0 | 187 | \r |
a16ba2b0 | 188 | wstart:\r |
cdc4625b | 189 | call sysram_init\r |
a16ba2b0 | 190 | call ivtab_init\r |
fecee241 | 191 | if CPU_Z180\r |
cdc4625b | 192 | ; call prt0_init\r |
fecee241 | 193 | endif\r |
a16ba2b0 | 194 | \r |
30d1329e | 195 | call charini\r |
bad2d92d | 196 | call bufferinit\r |
a16ba2b0 | 197 | \r |
fecee241 L |
198 | if CPU_Z80\r |
199 | ld a,0\r | |
200 | call selbnk\r | |
201 | endif\r | |
a16ba2b0 | 202 | \r |
cdc4625b L |
203 | ld a,INIDONEVAL ;tell others (CP/M) that hardware and fifos\r |
204 | ld (INIDONE),a ; are allready initialized\r | |
205 | \r | |
206 | im 2\r | |
207 | ei\r | |
a16ba2b0 | 208 | \r |
cdc4625b L |
209 | call ?const\r |
210 | call ?const\r | |
211 | or a\r | |
212 | call nz,?conin\r | |
815c1735 | 213 | \r |
fecee241 L |
214 | if CPU_Z180\r |
215 | ld e,0 ;Sys$Bank\r | |
216 | else\r | |
8df5b655 | 217 | ; TODO:\r |
fecee241 | 218 | endif\r |
cdc4625b | 219 | jp ddtz\r |
815c1735 | 220 | \r |
30d1329e | 221 | \r |
fecee241 | 222 | if CPU_Z180\r |
8df5b655 | 223 | ; TODO: SYS$CBR\r |
5f7f3586 | 224 | syscbr: db 0\r |
fecee241 | 225 | endif\r |
30d1329e | 226 | \r |
a16ba2b0 L |
227 | ;\r |
228 | ;----------------------------------------------------------------------\r | |
229 | ;\r | |
230 | \r | |
a16ba2b0 | 231 | global buf.init\r |
815c1735 | 232 | \r |
a16ba2b0 L |
233 | buf.init:\r |
234 | ld (ix+o.in_idx),0\r | |
235 | ld (ix+o.out_idx),0\r | |
236 | ld (ix+o.mask),a\r | |
cdc4625b L |
237 | \r |
238 | ld a,(ix+o.id)\r | |
239 | cp 4\r | |
240 | ret nc\r | |
241 | \r | |
242 | push de\r | |
243 | push hl\r | |
244 | ld hl,fifo_list\r | |
245 | push hl ;save fifo_list\r | |
246 | ld e,a\r | |
247 | ld d,0\r | |
248 | add hl,de\r | |
249 | add hl,de\r | |
250 | add hl,de\r | |
251 | push ix\r | |
252 | pop de\r | |
089ca8cc | 253 | ; TODO: address translation\r |
cdc4625b L |
254 | ld (hl),e\r |
255 | inc hl\r | |
256 | ld (hl),d\r | |
257 | pop hl ;get fifo_list back\r | |
258 | or a\r | |
259 | jr nz,bufi_ex\r | |
260 | \r | |
261 | ld (040h),hl\r | |
262 | ld (040h+2),a\r | |
263 | bufi_ex:\r | |
264 | pop hl\r | |
265 | pop de\r | |
266 | \r | |
a16ba2b0 L |
267 | ret\r |
268 | \r | |
cdc4625b L |
269 | \r |
270 | fifo_list:\r | |
271 | rept 4\r | |
272 | dw 0\r | |
273 | db 0\r | |
274 | endm\r | |
275 | \r | |
349c01b1 | 276 | ;----------------------------------------------------------------------\r |
4caee1ec | 277 | \r |
6a4e9540 L |
278 | extrn msginit,msg.sout\r |
279 | extrn mtx.fifo,mrx.fifo\r | |
280 | extrn co.fifo,ci.fifo\r | |
4caee1ec L |
281 | \r |
282 | \r | |
a16ba2b0 | 283 | bufferinit:\r |
fecee241 L |
284 | if CPU_Z180\r |
285 | call msginit\r | |
815c1735 | 286 | \r |
a16ba2b0 | 287 | ld hl,buffers\r |
6a4e9540 | 288 | ld b,buftablen\r |
a16ba2b0 | 289 | bfi_1:\r |
6a4e9540 L |
290 | ld a,(hl)\r |
291 | inc hl\r | |
292 | ld (bufdat+0),a\r | |
a16ba2b0 L |
293 | ld e,(hl)\r |
294 | inc hl\r | |
295 | ld d,(hl)\r | |
296 | inc hl\r | |
2fa1a706 | 297 | ex de,hl\r |
6a4e9540 L |
298 | \r |
299 | or a\r | |
300 | jr nz,bfi_2\r | |
cdc4625b L |
301 | ; call hwl2phy\r |
302 | ; ld (40h+0),hl\r | |
303 | ; ld (40h+2),a\r | |
2fa1a706 | 304 | out (AVRINT5),a\r |
cdc4625b | 305 | jr bfi_3\r |
6a4e9540 | 306 | bfi_2:\r |
2fa1a706 | 307 | call hwl2phy\r |
a16ba2b0 L |
308 | ld (bufdat+1),hl\r |
309 | ld (bufdat+3),a\r | |
a16ba2b0 L |
310 | ld hl,inimsg\r |
311 | call msg.sout\r | |
6a4e9540 | 312 | bfi_3:\r |
2fa1a706 | 313 | ex de,hl\r |
a16ba2b0 L |
314 | djnz bfi_1\r |
315 | ret\r | |
fecee241 | 316 | \r |
2fa1a706 | 317 | else ;CPU_Z180\r |
fecee241 L |
318 | \r |
319 | call msginit\r | |
8df5b655 L |
320 | \r |
321 | ld hl,buffers\r | |
322 | ld b,buftablen\r | |
323 | bfi_1:\r | |
324 | ld a,(hl)\r | |
325 | inc hl\r | |
326 | ld (bufdat+0),a\r | |
327 | ld e,(hl)\r | |
328 | inc hl\r | |
329 | ld d,(hl)\r | |
330 | inc hl\r | |
331 | ex de,hl\r | |
332 | \r | |
333 | or a\r | |
334 | jr nz,bfi_2\r | |
335 | \r | |
336 | ld a,(@cbnk)\r | |
2fa1a706 | 337 | call bnk2phy\r |
8df5b655 L |
338 | \r |
339 | ld (40h+0),hl\r | |
340 | ld (40h+2),a\r | |
341 | out (AVRINT5),a\r | |
342 | jr bfi_3\r | |
343 | bfi_2:\r | |
344 | \r | |
345 | ld a,(@cbnk)\r | |
2fa1a706 | 346 | call bnk2phy\r |
8df5b655 L |
347 | \r |
348 | ld (bufdat+1),hl\r | |
349 | ld (bufdat+3),a\r | |
350 | ld hl,inimsg\r | |
351 | call msg.sout\r | |
352 | bfi_3:\r | |
353 | ex de,hl\r | |
354 | djnz bfi_1\r | |
355 | ret\r | |
fecee241 | 356 | endif\r |
a16ba2b0 | 357 | \r |
a16ba2b0 | 358 | buffers:\r |
6a4e9540 L |
359 | db 0\r |
360 | dw mtx.fifo\r | |
361 | db 1\r | |
362 | dw mrx.fifo\r | |
363 | db 2\r | |
364 | dw co.fifo\r | |
365 | db 3\r | |
366 | dw ci.fifo\r | |
367 | buftablen equ ($ - buffers)/3\r | |
815c1735 L |
368 | \r |
369 | inimsg:\r | |
6a4e9540 | 370 | db inimsg_e - $ -1\r |
3531528e | 371 | db 0AEh\r |
a16ba2b0 L |
372 | db inimsg_e - $ -1\r |
373 | db 0\r | |
374 | bufdat:\r | |
375 | db 0\r | |
376 | dw 0\r | |
377 | db 0\r | |
e598b357 | 378 | inimsg_e:\r |
a16ba2b0 | 379 | \r |
4caee1ec | 380 | \r |
a16ba2b0 L |
381 | ;\r |
382 | ;----------------------------------------------------------------------\r | |
383 | ;\r | |
384 | \r | |
385 | sysram_init:\r | |
386 | ld hl,sysramw\r | |
387 | ld de,topcodsys\r | |
388 | ld bc,sysrame-sysramw\r | |
389 | ldir\r | |
390 | \r | |
391 | ret\r | |
392 | \r | |
393 | ;----------------------------------------------------------------------\r | |
394 | \r | |
395 | ivtab_init:\r | |
396 | ld hl,ivtab ;\r | |
397 | ld a,h ;\r | |
398 | ld i,a ;\r | |
fecee241 | 399 | if CPU_Z180\r |
a16ba2b0 | 400 | out0 (il),l ;\r |
fecee241 | 401 | endif\r |
a16ba2b0 L |
402 | \r |
403 | ; Let all vectors point to spurious int routines.\r | |
404 | \r | |
405 | ld d,high sp.int0\r | |
406 | ld a,low sp.int0\r | |
407 | ld b,9\r | |
815c1735 | 408 | ivt_i1:\r |
a16ba2b0 L |
409 | ld (hl),a\r |
410 | inc l\r | |
411 | ld (hl),d\r | |
412 | inc l\r | |
413 | add a,sp.int.len\r | |
414 | djnz ivt_i1\r | |
415 | ret\r | |
416 | \r | |
4caee1ec | 417 | ;----------------------------------------------------------------------\r |
a16ba2b0 | 418 | \r |
fecee241 | 419 | if CPU_Z180\r |
a16ba2b0 L |
420 | prt0_init:\r |
421 | ld a,i\r | |
422 | ld h,a\r | |
423 | in0 a,(il)\r | |
424 | and 0E0h\r | |
425 | or IV$PRT0\r | |
426 | ld l,a\r | |
427 | ld (hl),low iprt0\r | |
428 | inc hl\r | |
429 | ld (hl),high iprt0\r | |
430 | ld hl,prt0itab\r | |
2fe44122 | 431 | call ioiniml\r |
a16ba2b0 | 432 | ret\r |
815c1735 | 433 | \r |
a16ba2b0 L |
434 | prt0itab:\r |
435 | db prt0it_e-prt0itab-2\r | |
436 | db tmdr0l\r | |
437 | dw PRT_TC10MS\r | |
438 | dw PRT_TC10MS\r | |
439 | db M_TIE0+M_TDE0 ;enable timer 0 interrupt and down count.\r | |
440 | prt0it_e:\r | |
2fe44122 | 441 | db 0\r |
fecee241 | 442 | endif\r |
a16ba2b0 | 443 | \r |
4caee1ec | 444 | \r |
a16ba2b0 L |
445 | ;\r |
446 | ;----------------------------------------------------------------------\r | |
447 | ;\r | |
448 | \r | |
2fe44122 | 449 | if CPU_Z180\r |
a16ba2b0 | 450 | io.ini:\r |
2fe44122 | 451 | if 0\r |
a16ba2b0 L |
452 | push bc\r |
453 | ld b,0 ;high byte port adress\r | |
2fe44122 | 454 | ioi_nxt:\r |
a16ba2b0 L |
455 | ld a,(hl) ;count\r |
456 | inc hl\r | |
8df5b655 L |
457 | or a\r |
458 | jr z,ioi_e\r | |
2fe44122 | 459 | \r |
a16ba2b0 L |
460 | ld c,(hl) ;port address\r |
461 | inc hl\r | |
2fe44122 | 462 | ioi_r:\r |
a16ba2b0 L |
463 | outi\r |
464 | inc b ;outi decrements b\r | |
465 | dec a\r | |
2fe44122 L |
466 | jr nz,ioi_r\r |
467 | jr ioi_nxt\r | |
cdc4625b | 468 | ioi_e:\r |
2fe44122 L |
469 | pop bc\r |
470 | ret\r | |
cdc4625b | 471 | \r |
2fe44122 | 472 | else ;(if 1/0)\r |
cdc4625b | 473 | \r |
2fe44122 L |
474 | push bc\r |
475 | jr ioi_nxt\r | |
476 | ioi_l:\r | |
477 | ld c,(hl) ;port address\r | |
478 | inc hl\r | |
479 | inc c\r | |
480 | ioi_r:\r | |
481 | dec c ;otim increments c\r | |
482 | otim\r | |
483 | jr z,ioi_r\r | |
484 | ioi_nxt:\r | |
485 | ld b,(hl) ;count\r | |
486 | inc hl\r | |
487 | inc b ;stop if count == 0\r | |
488 | djnz ioi_l\r | |
489 | pop bc\r | |
490 | ret\r | |
cdc4625b | 491 | \r |
2fe44122 L |
492 | endif ;(1/0)\r |
493 | \r | |
fecee241 | 494 | else\r |
2fe44122 L |
495 | \r |
496 | io.ini:\r | |
497 | push bc\r | |
8df5b655 L |
498 | jr ioi_nxt\r |
499 | ioi_l:\r | |
500 | ld c,(hl) ;port address\r | |
501 | inc hl\r | |
502 | otir\r | |
503 | ioi_nxt:\r | |
504 | ld b,(hl) ;count\r | |
505 | inc hl\r | |
506 | inc b\r | |
507 | djnz ioi_l\r | |
fecee241 | 508 | endif\r |
a16ba2b0 L |
509 | pop bc\r |
510 | ret\r | |
511 | \r | |
2fe44122 L |
512 | ;----------------------------------------------------------------------\r |
513 | \r | |
fecee241 | 514 | if CPU_Z180\r |
2fe44122 L |
515 | \r |
516 | global ioiniml\r | |
517 | \r | |
518 | ioiniml:\r | |
a16ba2b0 | 519 | push bc\r |
2fe44122 L |
520 | xor a\r |
521 | ioml_lp:\r | |
a16ba2b0 L |
522 | ld b,(hl)\r |
523 | inc hl\r | |
2fe44122 L |
524 | cp b\r |
525 | jr z,ioml_e\r | |
cdc4625b | 526 | \r |
a16ba2b0 L |
527 | ld c,(hl)\r |
528 | inc hl\r | |
815c1735 | 529 | otimr\r |
2fe44122 L |
530 | jr ioml_lp\r |
531 | ioml_e:\r | |
815c1735 | 532 | pop bc\r |
2fe44122 | 533 | ret z\r |
fecee241 | 534 | endif\r |
815c1735 | 535 | \r |
a16ba2b0 L |
536 | io.ini.l:\r |
537 | ;\r | |
538 | \r | |
a16ba2b0 | 539 | \r |
a16ba2b0 | 540 | \r |
4caee1ec | 541 | ;----------------------------------------------------------------------\r |
a16ba2b0 | 542 | ;\r |
fecee241 | 543 | if CPU_Z180\r |
a16ba2b0 | 544 | \r |
2fa1a706 L |
545 | ;--------------------------------------------------------------------\r |
546 | ; Return the BBR value for the given bank number\r | |
fecee241 | 547 | ;\r |
2fa1a706 | 548 | ; in a: Bank number\r |
fecee241 | 549 | ; out a: bbr value\r |
a16ba2b0 | 550 | \r |
fecee241 | 551 | bnk2log:\r |
2fa1a706 L |
552 | or a ;\r |
553 | ret z ; Bank 0 is at physical address 0\r | |
554 | \r | |
555 | push bc ;\r | |
556 | ld b,a ;\r | |
557 | ld c,CA ;\r | |
558 | mlt bc ;\r | |
559 | ld a,c ;\r | |
560 | add a,10h ;\r | |
561 | pop bc ;\r | |
562 | ret ;\r | |
563 | \r | |
564 | ;--------------------------------------------------------------\r | |
a16ba2b0 | 565 | \r |
2fa1a706 L |
566 | ;in hl: Log. Address\r |
567 | ; a: Bank number\r | |
a16ba2b0 L |
568 | ;\r |
569 | ;out ahl: Phys. (linear) Address\r | |
570 | \r | |
571 | \r | |
2fa1a706 | 572 | bnk2phy:\r |
fecee241 | 573 | call bnk2log\r |
a16ba2b0 | 574 | ; fall thru\r |
2fa1a706 | 575 | \r |
a16ba2b0 L |
576 | ;--------------------------------------------------------------\r |
577 | ;\r | |
2fa1a706 | 578 | ; hl: Log. Address\r |
fecee241 | 579 | ; a: Bank base (bbr)\r |
a16ba2b0 | 580 | ;\r |
2fa1a706 L |
581 | ; 2 0 0\r |
582 | ; 0 6 8 0\r | |
583 | ; hl hhhhhhhhllllllll\r | |
584 | ; a + bbbbbbbb\r | |
585 | ;\r | |
586 | ; OP: ahl = (a<<12) + (h<<8) + l\r | |
a16ba2b0 | 587 | ;\r |
4caee1ec | 588 | ;out ahl: Phys. (linear) Address\r |
a16ba2b0 | 589 | \r |
2fa1a706 | 590 | log2phy:\r |
a16ba2b0 | 591 | push bc ;\r |
2fa1a706 | 592 | l2p_i:\r |
a16ba2b0 L |
593 | ld c,a ;\r |
594 | ld b,16 ;\r | |
fecee241 | 595 | mlt bc ; bc = a<<4\r |
2fa1a706 L |
596 | ld a,c ;\r |
597 | add a,h ;\r | |
598 | ld h,a ;\r | |
599 | ld a,b ;\r | |
600 | adc a,0 ;\r | |
fecee241 L |
601 | pop bc ;\r |
602 | ret ;\r | |
603 | \r | |
8df5b655 L |
604 | ;--------------------------------------------------------------\r |
605 | ;\r | |
2fa1a706 L |
606 | ; hl: Log. Address\r |
607 | ;\r | |
8df5b655 L |
608 | ;\r |
609 | ; OP: ahl = (bankbase<<12) + (d<<8) + e\r | |
610 | ;\r | |
611 | ;out ahl: Phys. (linear) Address\r | |
612 | \r | |
613 | \r | |
2fa1a706 | 614 | hwl2phy:\r |
8df5b655 | 615 | push bc ;\r |
2fa1a706 L |
616 | in0 c,(cbar) ;\r |
617 | ld a,h ;\r | |
618 | or 00fh ; log. addr in common1?\r | |
8df5b655 L |
619 | cp c\r |
620 | jr c,hlp_1\r | |
2fa1a706 L |
621 | \r |
622 | in0 a,(cbr) ; yes, cbr is address base\r | |
623 | jr hl2p_x\r | |
8df5b655 | 624 | hlp_1:\r |
2fa1a706 | 625 | ld b,16 ; log. address in baked area?\r |
8df5b655 | 626 | mlt bc\r |
2fa1a706 | 627 | ld a,h\r |
8df5b655 | 628 | cp c\r |
2fa1a706 L |
629 | jr c,hlp_2\r |
630 | in0 a,(bbr) ; yes, bbr is address base\r | |
631 | jr hl2p_x\r | |
632 | hlp_2:\r | |
633 | xor a ; common1\r | |
634 | hl2p_x:\r | |
635 | jr nz,l2p_i\r | |
636 | \r | |
637 | pop bc ; bank part is 0, no translation\r | |
8df5b655 L |
638 | ret ;\r |
639 | \r | |
8df5b655 | 640 | \r |
2fa1a706 L |
641 | \r |
642 | else ;CPU_Z180\r | |
643 | \r | |
8df5b655 L |
644 | ;----------------------------------------------------------------------\r |
645 | ;\r | |
646 | \r | |
2fa1a706 | 647 | bnk2phy:\r |
8df5b655 L |
648 | sla h\r |
649 | jr nc,b2p_1 ;A15=1 --> common\r | |
650 | ld a,3\r | |
651 | b2p_1:\r | |
652 | srl a\r | |
653 | rr h\r | |
654 | ret\r | |
655 | \r | |
fecee241 | 656 | endif\r |
a16ba2b0 L |
657 | \r |
658 | ;--------------------------------------------------------------\r | |
659 | ;\r | |
660 | ;return:\r | |
661 | ; hl = hl + a\r | |
662 | ; Flags undefined\r | |
663 | ;\r | |
664 | \r | |
665 | add_hl_a:\r | |
815c1735 L |
666 | add a,l\r |
667 | ld l,a\r | |
668 | ret nc\r | |
669 | inc h\r | |
670 | ret\r | |
a16ba2b0 L |
671 | \r |
672 | ; ---------------------------------------------------------\r | |
673 | \r | |
674 | sysramw:\r | |
675 | \r | |
676 | .phase isvsw_loc\r | |
677 | topcodsys:\r | |
678 | \r | |
679 | ; Trampoline for interrupt routines in banked ram.\r | |
680 | ; Switch stack pointer to "system" stack in top ram\r | |
681 | ; Save cbar\r | |
815c1735 | 682 | \r |
a16ba2b0 | 683 | isv_sw: ;\r |
2fa1a706 | 684 | ex (sp),hl ;save hl, 'return adr' in hl\r |
a16ba2b0 L |
685 | push de ;\r |
686 | push af ;\r | |
2fa1a706 | 687 | ex de,hl ;'return address' in de\r |
a16ba2b0 L |
688 | ld hl,0 ;\r |
689 | add hl,sp ;\r | |
690 | ld a,h ;\r | |
691 | cp 0f8h ;\r | |
2fa1a706 | 692 | jr nc,isw_1 ;stack allready in top ram\r |
a16ba2b0 L |
693 | ld sp,$stack ;\r |
694 | isw_1:\r | |
2fa1a706 | 695 | push hl ;save user stack pointer\r |
a16ba2b0 L |
696 | in0 h,(cbar) ;\r |
697 | push hl ;\r | |
698 | ld a,SYS$CBAR ;\r | |
699 | out0 (cbar),a ;\r | |
700 | ex de,hl ;\r | |
701 | ld e,(hl) ;\r | |
702 | inc hl ;\r | |
703 | ld d,(hl) ;\r | |
704 | ex de,hl ;\r | |
705 | push bc ;\r | |
706 | call jphl ;\r | |
707 | \r | |
708 | pop bc ;\r | |
709 | pop hl ;\r | |
710 | out0 (cbar),h ;\r | |
711 | pop hl ;\r | |
712 | ld sp,hl ;\r | |
713 | pop af ;\r | |
714 | pop de ;\r | |
715 | pop hl ;\r | |
716 | ei ;\r | |
717 | ret ;\r | |
718 | jphl:\r | |
719 | jp (hl) ;\r | |
720 | \r | |
721 | ; ---------------------------------------------------------\r | |
722 | \r | |
fecee241 | 723 | if CPU_Z180\r |
4caee1ec | 724 | \r |
a16ba2b0 L |
725 | iprt0:\r |
726 | push af\r | |
727 | push hl\r | |
728 | in0 a,(tcr)\r | |
729 | in0 a,(tmdr0l)\r | |
730 | in0 a,(tmdr0h)\r | |
731 | ld a,(tim_ms)\r | |
732 | inc a\r | |
733 | cp 100\r | |
734 | jr nz,iprt_1\r | |
735 | xor a\r | |
736 | ld hl,(tim_s)\r | |
737 | inc hl\r | |
738 | ld (tim_s),hl\r | |
739 | iprt_1:\r | |
740 | ld (tim_ms),a\r | |
741 | pop hl\r | |
742 | pop af\r | |
743 | ei\r | |
744 | ret\r | |
745 | \r | |
fecee241 | 746 | endif\r |
8df5b655 | 747 | \r |
a16ba2b0 L |
748 | ; ---------------------------------------------------------\r |
749 | \r | |
750 | sp.int0:\r | |
751 | ld a,0d0h\r | |
752 | jr sp.i.1\r | |
753 | sp.int.len equ $-sp.int0\r | |
754 | ld a,0d1h\r | |
755 | jr sp.i.1\r | |
756 | ld a,0d2h\r | |
757 | jr sp.i.1\r | |
758 | ld a,0d3h\r | |
759 | jr sp.i.1\r | |
760 | ld a,0d4h\r | |
761 | jr sp.i.1\r | |
762 | ld a,0d5h\r | |
763 | jr sp.i.1\r | |
764 | ld a,0d6h\r | |
765 | jr sp.i.1\r | |
766 | ld a,0d7h\r | |
767 | jr sp.i.1\r | |
768 | ld a,0d8h\r | |
769 | sp.i.1:\r | |
770 | ; out (80h),a\r | |
771 | halt\r | |
772 | \r | |
8df5b655 L |
773 | ; ---------------------------------------------------------\r |
774 | \r | |
fecee241 | 775 | if CPU_Z80\r |
8df5b655 L |
776 | \r |
777 | ; Get IFF2\r | |
778 | ; This routine may not be loaded in page zero\r | |
779 | ;\r | |
780 | ; return Carry clear, if INTs are enabled.\r | |
781 | ;\r | |
782 | global getiff\r | |
783 | getiff:\r | |
784 | xor a ;clear accu and carry\r | |
785 | push af ;stack bottom := 00xxh\r | |
786 | pop af\r | |
787 | ld a,i ;P flag := IFF2\r | |
788 | ret pe ;exit carry clear, if enabled\r | |
789 | dec sp\r | |
790 | dec sp ;has stack bottom been overwritten?\r | |
791 | pop af\r | |
792 | and a ;if not 00xxh, INTs were\r | |
793 | ret nz ;actually enabled\r | |
794 | scf ;Otherwise, they really are disabled\r | |
795 | ret\r | |
796 | \r | |
797 | ;----------------------------------------------------------------------\r | |
798 | \r | |
799 | global selbnk\r | |
800 | \r | |
801 | ; a: bank (0..2)\r | |
802 | \r | |
803 | selbnk:\r | |
804 | push bc\r | |
805 | ld c,a\r | |
806 | call getiff\r | |
807 | push af\r | |
808 | \r | |
809 | ld a,c\r | |
810 | di\r | |
811 | ld (@cbnk),a\r | |
812 | ld a,5\r | |
813 | out (SIOAC),a\r | |
814 | ld a,(mm_sio0)\r | |
815 | rla\r | |
816 | srl c\r | |
817 | rra\r | |
818 | out (SIOAC),a\r | |
819 | ld (mm_sio0),a\r | |
820 | \r | |
821 | ld a,5\r | |
822 | out (SIOBC),a\r | |
823 | ld a,(mm_sio1)\r | |
824 | rla\r | |
825 | srl c\r | |
826 | rra\r | |
827 | out (SIOBC),a\r | |
828 | ld (mm_sio1),a\r | |
829 | pop af\r | |
830 | pop bc\r | |
831 | ret c ;INTs were disabled\r | |
832 | ei\r | |
833 | ret\r | |
834 | \r | |
835 | ;----------------------------------------------------------------------\r | |
836 | \r | |
837 | ; c: bank (0..2)\r | |
838 | \r | |
fecee241 | 839 | if 0\r |
8df5b655 L |
840 | \r |
841 | selbnk:\r | |
842 | ld a,(@cbnk)\r | |
843 | xor c\r | |
844 | and 3\r | |
845 | ret z ;no change\r | |
846 | \r | |
847 | call getiff\r | |
848 | push af\r | |
849 | ld a,c\r | |
850 | di\r | |
851 | ld (@cbnk),a\r | |
852 | ld a,5\r | |
853 | out (SIOAC),a\r | |
854 | ld a,(mm_sio0)\r | |
855 | rla\r | |
856 | srl c\r | |
857 | rra\r | |
858 | out (SIOAC),a\r | |
859 | ld (mm_sio0),a\r | |
860 | \r | |
861 | ld a,5\r | |
862 | out (SIOBC),a\r | |
863 | ld a,(mm_sio1)\r | |
864 | rla\r | |
865 | srl c\r | |
866 | rra\r | |
867 | out (SIOBC),a\r | |
868 | ld (mm_sio1),a\r | |
869 | pop af\r | |
870 | ret nc ;INTs were disabled\r | |
871 | ei\r | |
872 | ret\r | |
873 | \r | |
fecee241 | 874 | endif\r |
8df5b655 L |
875 | \r |
876 | ;----------------------------------------------------------------------\r | |
877 | \r | |
fecee241 | 878 | if 0\r |
8df5b655 L |
879 | ex af,af'\r |
880 | push af\r | |
881 | ex af,af'\r | |
882 | \r | |
883 | rra\r | |
884 | jr nc,stbk1\r | |
885 | ex af,af'\r | |
886 | ld a,5\r | |
887 | out (SIOAC),a\r | |
888 | ld a,(mm_sio0)\r | |
889 | rla\r | |
890 | srl c\r | |
891 | rra\r | |
892 | out (SIOAC),a\r | |
893 | ld (mm_sio1),a\r | |
894 | ex af,af'\r | |
895 | \r | |
896 | stbk1:\r | |
897 | rra\r | |
898 | jr nc,stbk2\r | |
899 | ex af,af'\r | |
900 | ld a,5\r | |
901 | out (SIOBC),a\r | |
902 | ld a,(mm_sio1)\r | |
903 | rla\r | |
904 | srl c\r | |
905 | rra\r | |
906 | out (SIOBC),a\r | |
907 | ld (mm_sio1),a\r | |
908 | ex af,af'\r | |
909 | \r | |
910 | stbk2:\r | |
fecee241 | 911 | endif\r |
8df5b655 L |
912 | \r |
913 | global @cbnk\r | |
914 | global mm_sio0, mm_sio1\r | |
915 | \r | |
916 | @cbnk: db 0 ; current bank (0..2)\r | |
917 | mm_sio0:\r | |
918 | ds 1\r | |
919 | mm_sio1:\r | |
920 | ds 1\r | |
921 | \r | |
922 | \r | |
fecee241 | 923 | endif\r |
8df5b655 L |
924 | \r |
925 | ;----------------------------------------------------------------------\r | |
926 | \r | |
a16ba2b0 L |
927 | curph defl $\r |
928 | .dephase\r | |
929 | sysrame:\r | |
930 | .phase curph\r | |
931 | tim_ms: db 0\r | |
932 | tim_s: dw 0\r | |
933 | .dephase\r | |
815c1735 | 934 | \r |
a16ba2b0 L |
935 | ;-----------------------------------------------------\r |
936 | \r | |
8df5b655 | 937 | \r |
a16ba2b0 L |
938 | cseg\r |
939 | \r | |
940 | ;.phase 0ffc0h\r | |
941 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
942 | ;.dephase\r | |
943 | \r | |
fecee241 L |
944 | ;.phase 0fffah\r |
945 | mark_55AA equ 0 - 2 - 4 ;2 byte for trap stack\r | |
946 | ;ds 4\r | |
a16ba2b0 L |
947 | ;.dephase\r |
948 | \r | |
949 | \r | |
950 | end\r |