]>
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 | |
82 | db cbar,SYS$CBAR\r | |
fecee241 | 83 | endif\r |
2fe44122 | 84 | db 0\r |
fecee241 L |
85 | \r |
86 | if CPU_Z180\r | |
a16ba2b0 L |
87 | dmclrt: ;clear ram per dma\r |
88 | db dmct_e-dmclrt-2 ;\r | |
89 | db sar0l ;first port\r | |
815c1735 | 90 | dw nullbyte ;src (fixed)\r |
a16ba2b0 L |
91 | nullbyte:\r |
92 | db 000h ;src\r | |
93 | dw romend ;dst (inc), start after "rom" code\r | |
94 | db 00h ;dst\r | |
95 | dw 0-romend ;count (64k)\r | |
96 | dmct_e:\r | |
2fe44122 | 97 | db 0\r |
fecee241 L |
98 | endif\r |
99 | \r | |
a16ba2b0 | 100 | \r |
8df5b655 | 101 | cstart:\r |
fecee241 | 102 | if CPU_Z180\r |
a16ba2b0 | 103 | \r |
30d1329e L |
104 | push af\r |
105 | in0 a,(itc) ;Illegal opcode trap?\r | |
106 | jp m,??st01\r | |
107 | ld a,i ;I register == 0 ?\r | |
fecee241 | 108 | jr z,hw_reset ; yes, harware reset\r |
a16ba2b0 L |
109 | \r |
110 | ??st01:\r | |
fecee241 | 111 | ; TODO: SYS$CBR\r |
30d1329e L |
112 | ld a,(syscbr)\r |
113 | out0 (cbr),a\r | |
114 | pop af ;restore registers\r | |
30d1329e | 115 | jp bpent ;\r |
a16ba2b0 | 116 | \r |
fecee241 | 117 | hw_reset:\r |
a16ba2b0 L |
118 | di ;0058\r |
119 | ld a,CREFSH\r | |
120 | out0 (rcr),a ; configure DRAM refresh\r | |
121 | ld a,CWAITIO\r | |
122 | out0 (dcntl),a ; wait states\r | |
123 | \r | |
815c1735 L |
124 | ld a,M_NCD ;No Clock Divide\r |
125 | out0 (ccr),a\r | |
bad2d92d L |
126 | ; ld a,M_X2CM ;X2 Clock Multiplier\r |
127 | ; out0 (cmr),a\r | |
fecee241 | 128 | else\r |
8df5b655 L |
129 | di\r |
130 | xor a\r | |
131 | ld (@cbnk),a\r | |
fecee241 | 132 | endif\r |
815c1735 | 133 | \r |
fecee241 | 134 | ; check warm start mark\r |
a16ba2b0 | 135 | \r |
8df5b655 L |
136 | ld ix,mark_55AA ; top of common area\r |
137 | ld a,0aah ;\r | |
138 | cp (ix+000h) ;\r | |
139 | jr nz,kstart ;\r | |
140 | cp (ix+002h) ;\r | |
141 | jr nz,kstart ;\r | |
142 | cpl ;\r | |
143 | cp (ix+001h) ;\r | |
144 | jr nz,kstart ;\r | |
145 | cp (ix+003h) ;\r | |
146 | jr nz,kstart ;\r | |
147 | ld sp,$stack ; mark found, check\r | |
148 | jp z,wstart ; check ok,\r | |
fecee241 | 149 | \r |
a16ba2b0 L |
150 | ; ram not ok, initialize -- kstart --\r |
151 | \r | |
152 | kstart:\r | |
fecee241 L |
153 | if CPU_Z180\r |
154 | ld a,SYS$CBAR\r | |
155 | out0 (cbar),a\r | |
156 | ld a,SYS$CBR\r | |
8df5b655 | 157 | out0 (cbr),a\r |
fecee241 | 158 | endif\r |
a16ba2b0 | 159 | \r |
a16ba2b0 | 160 | ld sp,$stack ;01e1\r |
815c1735 | 161 | \r |
a16ba2b0 L |
162 | ; Clear RAM using DMA0\r |
163 | \r | |
fecee241 L |
164 | if CPU_Z180\r |
165 | if 0\r | |
8df5b655 | 166 | \r |
a16ba2b0 | 167 | ld hl,dmclrt ;load DMA registers\r |
2fe44122 | 168 | call ioiniml\r |
a16ba2b0 L |
169 | ld a,0cbh ;01ef dst +1, src fixed, burst\r |
170 | out0 (dmode),a ;01f1\r | |
171 | \r | |
172 | ld b,512/64\r | |
815c1735 | 173 | ld a,062h ;01f4 enable dma0,\r |
a16ba2b0 L |
174 | ??cl_1:\r |
175 | out0 (dstat),a ;01f9 clear (up to) 64k\r | |
176 | djnz ??cl_1 ; end of RAM?\r | |
8df5b655 | 177 | \r |
fecee241 L |
178 | endif\r |
179 | endif\r | |
a16ba2b0 L |
180 | \r |
181 | ld hl,055AAh ;set warm start mark\r | |
fecee241 L |
182 | ld (mark_55AA),hl\r |
183 | ld (mark_55AA+2),hl\r | |
184 | \r | |
185 | ; -- wstart --\r | |
a16ba2b0 | 186 | \r |
a16ba2b0 L |
187 | wstart:\r |
188 | call sysram_init ;027f\r | |
189 | call ivtab_init\r | |
fecee241 L |
190 | if CPU_Z180\r |
191 | call prt0_init\r | |
192 | endif\r | |
a16ba2b0 | 193 | \r |
30d1329e | 194 | call charini\r |
bad2d92d | 195 | call bufferinit\r |
a16ba2b0 | 196 | \r |
fecee241 L |
197 | if CPU_Z80\r |
198 | ld a,0\r | |
199 | call selbnk\r | |
200 | endif\r | |
a16ba2b0 L |
201 | \r |
202 | im 2 ;?030e\r | |
203 | ei ;0282\r | |
204 | \r | |
30d1329e L |
205 | call ?const ;0284\r |
206 | call ?const ;0287\r | |
a16ba2b0 | 207 | or a ;028a\r |
30d1329e | 208 | call nz,?conin ;028d\r |
815c1735 | 209 | \r |
fecee241 L |
210 | if CPU_Z180\r |
211 | ld e,0 ;Sys$Bank\r | |
212 | else\r | |
8df5b655 | 213 | ; TODO:\r |
fecee241 | 214 | endif\r |
a16ba2b0 | 215 | jp ddtz ;0290\r |
815c1735 | 216 | \r |
30d1329e | 217 | \r |
fecee241 | 218 | if CPU_Z180\r |
8df5b655 | 219 | ; TODO: SYS$CBR\r |
30d1329e | 220 | syscbr: db 1\r |
fecee241 | 221 | endif\r |
30d1329e | 222 | \r |
a16ba2b0 L |
223 | ;\r |
224 | ;----------------------------------------------------------------------\r | |
225 | ;\r | |
226 | \r | |
a16ba2b0 L |
227 | ;TODO: Make a ringbuffer module.\r |
228 | \r | |
229 | global buf.init\r | |
815c1735 | 230 | \r |
a16ba2b0 L |
231 | buf.init:\r |
232 | ld (ix+o.in_idx),0\r | |
233 | ld (ix+o.out_idx),0\r | |
234 | ld (ix+o.mask),a\r | |
235 | ret\r | |
236 | \r | |
237 | ;----------------------------------------------------------------------\r | |
6a4e9540 | 238 | if 0\r |
bad2d92d L |
239 | extrn msginit,msg_tx_fifo,msg_rx_fifo\r |
240 | extrn msg.sout\r | |
349c01b1 L |
241 | \r |
242 | bufferinit:\r | |
349c01b1 | 243 | \r |
bad2d92d | 244 | ld de,msg_tx_fifo\r |
349c01b1 L |
245 | in0 a,cbr\r |
246 | call log2phys\r | |
247 | ld (40h+0),hl\r | |
248 | ld (40h+2),a\r | |
bad2d92d | 249 | \r |
6a4e9540 L |
250 | ; ld (bufdat+1),hl\r |
251 | ; ld (bufdat+3),a\r | |
252 | ; ld a,1\r | |
253 | ; ld (bufdat+0),a\r | |
254 | ; ld hl,inimsg\r | |
255 | ; call msg.sout\r | |
349c01b1 | 256 | \r |
bad2d92d L |
257 | ld de,msg_rx_fifo\r |
258 | in0 a,cbr\r | |
259 | call log2phys\r | |
260 | ld (bufdat+1),hl\r | |
261 | ld (bufdat+3),a\r | |
6a4e9540 | 262 | ld a,2\r |
bad2d92d L |
263 | ld (bufdat+0),a\r |
264 | ld hl,inimsg\r | |
265 | call msg.sout\r | |
349c01b1 | 266 | \r |
bad2d92d | 267 | ret\r |
a16ba2b0 | 268 | \r |
349c01b1 | 269 | inimsg:\r |
bad2d92d | 270 | db inimsg_e - $ - 1\r |
3531528e | 271 | db 0AEh\r |
bad2d92d | 272 | db inimsg_e - $ - 1\r |
349c01b1 L |
273 | db 0\r |
274 | bufdat:\r | |
275 | db 0\r | |
276 | dw 0\r | |
277 | db 0\r | |
278 | inimsg_e:\r | |
bad2d92d | 279 | \r |
6a4e9540 | 280 | endif\r |
fecee241 | 281 | \r |
349c01b1 | 282 | ;----------------------------------------------------------------------\r |
4caee1ec | 283 | \r |
6a4e9540 L |
284 | extrn msginit,msg.sout\r |
285 | extrn mtx.fifo,mrx.fifo\r | |
286 | extrn co.fifo,ci.fifo\r | |
4caee1ec L |
287 | \r |
288 | \r | |
a16ba2b0 | 289 | bufferinit:\r |
fecee241 L |
290 | if CPU_Z180\r |
291 | call msginit\r | |
815c1735 | 292 | \r |
a16ba2b0 | 293 | ld hl,buffers\r |
6a4e9540 | 294 | ld b,buftablen\r |
a16ba2b0 | 295 | bfi_1:\r |
6a4e9540 L |
296 | ld a,(hl)\r |
297 | inc hl\r | |
298 | ld (bufdat+0),a\r | |
a16ba2b0 L |
299 | ld e,(hl)\r |
300 | inc hl\r | |
301 | ld d,(hl)\r | |
302 | inc hl\r | |
303 | push hl\r | |
6a4e9540 L |
304 | \r |
305 | or a\r | |
306 | jr nz,bfi_2\r | |
8df5b655 | 307 | call hw_log2phys\r |
6a4e9540 L |
308 | ld (40h+0),hl\r |
309 | ld (40h+2),a\r | |
310 | out0 (AVRINT5),a\r | |
311 | jr bfi_3 \r | |
312 | bfi_2:\r | |
8df5b655 | 313 | call hw_log2phys\r |
a16ba2b0 L |
314 | ld (bufdat+1),hl\r |
315 | ld (bufdat+3),a\r | |
a16ba2b0 L |
316 | ld hl,inimsg\r |
317 | call msg.sout\r | |
6a4e9540 | 318 | bfi_3:\r |
a16ba2b0 | 319 | pop hl\r |
a16ba2b0 L |
320 | djnz bfi_1\r |
321 | ret\r | |
fecee241 L |
322 | \r |
323 | else\r | |
324 | \r | |
325 | call msginit\r | |
8df5b655 L |
326 | \r |
327 | ld hl,buffers\r | |
328 | ld b,buftablen\r | |
329 | bfi_1:\r | |
330 | ld a,(hl)\r | |
331 | inc hl\r | |
332 | ld (bufdat+0),a\r | |
333 | ld e,(hl)\r | |
334 | inc hl\r | |
335 | ld d,(hl)\r | |
336 | inc hl\r | |
337 | ex de,hl\r | |
338 | \r | |
339 | or a\r | |
340 | jr nz,bfi_2\r | |
341 | \r | |
342 | ld a,(@cbnk)\r | |
343 | call bnk2phys\r | |
344 | \r | |
345 | ld (40h+0),hl\r | |
346 | ld (40h+2),a\r | |
347 | out (AVRINT5),a\r | |
348 | jr bfi_3\r | |
349 | bfi_2:\r | |
350 | \r | |
351 | ld a,(@cbnk)\r | |
352 | call bnk2phys\r | |
353 | \r | |
354 | ld (bufdat+1),hl\r | |
355 | ld (bufdat+3),a\r | |
356 | ld hl,inimsg\r | |
357 | call msg.sout\r | |
358 | bfi_3:\r | |
359 | ex de,hl\r | |
360 | djnz bfi_1\r | |
361 | ret\r | |
fecee241 | 362 | endif\r |
a16ba2b0 | 363 | \r |
a16ba2b0 | 364 | buffers:\r |
6a4e9540 L |
365 | db 0\r |
366 | dw mtx.fifo\r | |
367 | db 1\r | |
368 | dw mrx.fifo\r | |
369 | db 2\r | |
370 | dw co.fifo\r | |
371 | db 3\r | |
372 | dw ci.fifo\r | |
373 | buftablen equ ($ - buffers)/3\r | |
815c1735 L |
374 | \r |
375 | inimsg:\r | |
6a4e9540 | 376 | db inimsg_e - $ -1\r |
3531528e | 377 | db 0AEh\r |
a16ba2b0 L |
378 | db inimsg_e - $ -1\r |
379 | db 0\r | |
380 | bufdat:\r | |
381 | db 0\r | |
382 | dw 0\r | |
383 | db 0\r | |
e598b357 | 384 | inimsg_e:\r |
a16ba2b0 | 385 | \r |
4caee1ec | 386 | \r |
a16ba2b0 L |
387 | ;\r |
388 | ;----------------------------------------------------------------------\r | |
389 | ;\r | |
390 | \r | |
391 | sysram_init:\r | |
392 | ld hl,sysramw\r | |
393 | ld de,topcodsys\r | |
394 | ld bc,sysrame-sysramw\r | |
395 | ldir\r | |
396 | \r | |
397 | ret\r | |
398 | \r | |
399 | ;----------------------------------------------------------------------\r | |
400 | \r | |
401 | ivtab_init:\r | |
402 | ld hl,ivtab ;\r | |
403 | ld a,h ;\r | |
404 | ld i,a ;\r | |
fecee241 | 405 | if CPU_Z180\r |
a16ba2b0 | 406 | out0 (il),l ;\r |
fecee241 | 407 | endif\r |
a16ba2b0 L |
408 | \r |
409 | ; Let all vectors point to spurious int routines.\r | |
410 | \r | |
411 | ld d,high sp.int0\r | |
412 | ld a,low sp.int0\r | |
413 | ld b,9\r | |
815c1735 | 414 | ivt_i1:\r |
a16ba2b0 L |
415 | ld (hl),a\r |
416 | inc l\r | |
417 | ld (hl),d\r | |
418 | inc l\r | |
419 | add a,sp.int.len\r | |
420 | djnz ivt_i1\r | |
421 | ret\r | |
422 | \r | |
4caee1ec | 423 | ;----------------------------------------------------------------------\r |
a16ba2b0 | 424 | \r |
fecee241 | 425 | if CPU_Z180\r |
a16ba2b0 L |
426 | prt0_init:\r |
427 | ld a,i\r | |
428 | ld h,a\r | |
429 | in0 a,(il)\r | |
430 | and 0E0h\r | |
431 | or IV$PRT0\r | |
432 | ld l,a\r | |
433 | ld (hl),low iprt0\r | |
434 | inc hl\r | |
435 | ld (hl),high iprt0\r | |
436 | ld hl,prt0itab\r | |
2fe44122 | 437 | call ioiniml\r |
a16ba2b0 | 438 | ret\r |
815c1735 | 439 | \r |
a16ba2b0 L |
440 | prt0itab:\r |
441 | db prt0it_e-prt0itab-2\r | |
442 | db tmdr0l\r | |
443 | dw PRT_TC10MS\r | |
444 | dw PRT_TC10MS\r | |
445 | db M_TIE0+M_TDE0 ;enable timer 0 interrupt and down count.\r | |
446 | prt0it_e:\r | |
2fe44122 | 447 | db 0\r |
fecee241 | 448 | endif\r |
a16ba2b0 | 449 | \r |
4caee1ec | 450 | \r |
a16ba2b0 L |
451 | ;\r |
452 | ;----------------------------------------------------------------------\r | |
453 | ;\r | |
454 | \r | |
2fe44122 | 455 | if CPU_Z180\r |
a16ba2b0 | 456 | io.ini:\r |
2fe44122 | 457 | if 0\r |
a16ba2b0 L |
458 | push bc\r |
459 | ld b,0 ;high byte port adress\r | |
2fe44122 | 460 | ioi_nxt:\r |
a16ba2b0 L |
461 | ld a,(hl) ;count\r |
462 | inc hl\r | |
8df5b655 L |
463 | or a\r |
464 | jr z,ioi_e\r | |
2fe44122 | 465 | \r |
a16ba2b0 L |
466 | ld c,(hl) ;port address\r |
467 | inc hl\r | |
2fe44122 | 468 | ioi_r:\r |
a16ba2b0 L |
469 | outi\r |
470 | inc b ;outi decrements b\r | |
471 | dec a\r | |
2fe44122 L |
472 | jr nz,ioi_r\r |
473 | jr ioi_nxt\r | |
fecee241 | 474 | ioi_e: \r |
2fe44122 L |
475 | pop bc\r |
476 | ret\r | |
477 | \r | |
478 | else ;(if 1/0)\r | |
479 | \r | |
480 | push bc\r | |
481 | jr ioi_nxt\r | |
482 | ioi_l:\r | |
483 | ld c,(hl) ;port address\r | |
484 | inc hl\r | |
485 | inc c\r | |
486 | ioi_r:\r | |
487 | dec c ;otim increments c\r | |
488 | otim\r | |
489 | jr z,ioi_r\r | |
490 | ioi_nxt:\r | |
491 | ld b,(hl) ;count\r | |
492 | inc hl\r | |
493 | inc b ;stop if count == 0\r | |
494 | djnz ioi_l\r | |
495 | pop bc\r | |
496 | ret\r | |
497 | \r | |
498 | endif ;(1/0)\r | |
499 | \r | |
fecee241 | 500 | else\r |
2fe44122 L |
501 | \r |
502 | io.ini:\r | |
503 | push bc\r | |
8df5b655 L |
504 | jr ioi_nxt\r |
505 | ioi_l:\r | |
506 | ld c,(hl) ;port address\r | |
507 | inc hl\r | |
508 | otir\r | |
509 | ioi_nxt:\r | |
510 | ld b,(hl) ;count\r | |
511 | inc hl\r | |
512 | inc b\r | |
513 | djnz ioi_l\r | |
fecee241 | 514 | endif\r |
a16ba2b0 L |
515 | pop bc\r |
516 | ret\r | |
517 | \r | |
2fe44122 L |
518 | ;----------------------------------------------------------------------\r |
519 | \r | |
fecee241 | 520 | if CPU_Z180\r |
2fe44122 L |
521 | \r |
522 | global ioiniml\r | |
523 | \r | |
524 | ioiniml:\r | |
a16ba2b0 | 525 | push bc\r |
2fe44122 L |
526 | xor a\r |
527 | ioml_lp:\r | |
a16ba2b0 L |
528 | ld b,(hl)\r |
529 | inc hl\r | |
2fe44122 L |
530 | cp b\r |
531 | jr z,ioml_e\r | |
532 | \r | |
a16ba2b0 L |
533 | ld c,(hl)\r |
534 | inc hl\r | |
815c1735 | 535 | otimr\r |
2fe44122 L |
536 | jr ioml_lp\r |
537 | ioml_e:\r | |
815c1735 | 538 | pop bc\r |
2fe44122 | 539 | ret z\r |
fecee241 | 540 | endif\r |
815c1735 | 541 | \r |
a16ba2b0 L |
542 | io.ini.l:\r |
543 | ;\r | |
544 | \r | |
a16ba2b0 | 545 | \r |
a16ba2b0 | 546 | \r |
4caee1ec | 547 | ;----------------------------------------------------------------------\r |
a16ba2b0 | 548 | ;\r |
fecee241 | 549 | if CPU_Z180\r |
a16ba2b0 | 550 | \r |
fecee241 L |
551 | ; a: Bank number\r |
552 | ;\r | |
553 | ; out a: bbr value\r | |
a16ba2b0 | 554 | \r |
fecee241 L |
555 | bnk2log:\r |
556 | push bc\r | |
557 | ld b,a\r | |
558 | ld c,CA\r | |
559 | mlt bc\r | |
560 | add a,10h\r | |
561 | pop bc\r | |
562 | ret\r | |
a16ba2b0 | 563 | \r |
a16ba2b0 L |
564 | ; de: Log. Address\r |
565 | ; a: Bank number\r | |
566 | ;\r | |
567 | ;out ahl: Phys. (linear) Address\r | |
568 | \r | |
569 | \r | |
570 | bnk2phys:\r | |
fecee241 | 571 | call bnk2log\r |
a16ba2b0 L |
572 | \r |
573 | ; fall thru\r | |
574 | ;--------------------------------------------------------------\r | |
575 | ;\r | |
576 | ; de: Log. Address\r | |
fecee241 | 577 | ; a: Bank base (bbr)\r |
a16ba2b0 L |
578 | ;\r |
579 | ; OP: ahl = (a<<12) + (d<<8) + e\r | |
580 | ;\r | |
4caee1ec | 581 | ;out ahl: Phys. (linear) Address\r |
a16ba2b0 L |
582 | \r |
583 | \r | |
584 | log2phys:\r | |
585 | push bc ;\r | |
586 | ld c,a ;\r | |
587 | ld b,16 ;\r | |
fecee241 L |
588 | mlt bc ; bc = a<<4\r |
589 | ld l,d ;4\r | |
590 | ld h,0 ;6\r | |
591 | add hl,bc ;7 bc + d == a<<4 + d\r | |
592 | ld a,h ;4\r | |
593 | ld h,l ;4\r | |
594 | ld l,e ;4\r | |
a16ba2b0 L |
595 | pop bc ;\r |
596 | ret ;\r | |
597 | \r | |
fecee241 L |
598 | if 0\r |
599 | \r | |
600 | log2phys:\r | |
601 | push bc ;\r | |
602 | ld b,a ;\r | |
603 | ld c,16 ;\r | |
604 | mlt bc ; bc = a<<4\r | |
605 | ld a,c ;4\r | |
606 | add a,h ;4\r | |
607 | ld h,a ;4\r | |
608 | ld a,b ;4\r | |
609 | adc a,0 ;6\r | |
610 | pop bc ;\r | |
611 | ret ;\r | |
612 | \r | |
613 | endif\r | |
8df5b655 L |
614 | ;--------------------------------------------------------------\r |
615 | ;\r | |
616 | ; de: Log. Address\r | |
617 | ; \r | |
618 | ;\r | |
619 | ; OP: ahl = (bankbase<<12) + (d<<8) + e\r | |
620 | ;\r | |
621 | ;out ahl: Phys. (linear) Address\r | |
622 | \r | |
623 | \r | |
624 | hw_log2phys:\r | |
625 | push bc ;\r | |
626 | in0 c,(cbar)\r | |
627 | ld a,d\r | |
628 | or 00fh\r | |
629 | cp c\r | |
630 | jr c,hlp_1\r | |
631 | in0 c,(cbr)\r | |
632 | jr hlp_e\r | |
633 | hlp_1:\r | |
634 | ld b,16\r | |
635 | mlt bc\r | |
636 | ld a,d\r | |
637 | cp c\r | |
638 | ld c,0\r | |
639 | jr c,hlp_e\r | |
640 | in0 c,(bbr)\r | |
641 | hlp_e: \r | |
642 | ld b,16 ;\r | |
643 | mlt bc ;bc = a<<4\r | |
644 | ld l,d ;\r | |
645 | ld h,0 ;\r | |
646 | add hl,bc ;bc + d == a<<4 + d\r | |
647 | ld a,h ;\r | |
648 | ld h,l ;\r | |
649 | ld l,e ;\r | |
650 | pop bc ;\r | |
651 | ret ;\r | |
652 | \r | |
fecee241 | 653 | else\r |
8df5b655 L |
654 | \r |
655 | ;\r | |
656 | ;----------------------------------------------------------------------\r | |
657 | ;\r | |
658 | \r | |
659 | bnk2phys:\r | |
660 | sla h\r | |
661 | jr nc,b2p_1 ;A15=1 --> common\r | |
662 | ld a,3\r | |
663 | b2p_1:\r | |
664 | srl a\r | |
665 | rr h\r | |
666 | ret\r | |
667 | \r | |
fecee241 | 668 | endif\r |
a16ba2b0 L |
669 | \r |
670 | ;--------------------------------------------------------------\r | |
671 | ;\r | |
672 | ;return:\r | |
673 | ; hl = hl + a\r | |
674 | ; Flags undefined\r | |
675 | ;\r | |
676 | \r | |
677 | add_hl_a:\r | |
815c1735 L |
678 | add a,l\r |
679 | ld l,a\r | |
680 | ret nc\r | |
681 | inc h\r | |
682 | ret\r | |
a16ba2b0 L |
683 | \r |
684 | ; ---------------------------------------------------------\r | |
685 | \r | |
686 | sysramw:\r | |
687 | \r | |
688 | .phase isvsw_loc\r | |
689 | topcodsys:\r | |
690 | \r | |
691 | ; Trampoline for interrupt routines in banked ram.\r | |
692 | ; Switch stack pointer to "system" stack in top ram\r | |
693 | ; Save cbar\r | |
815c1735 | 694 | \r |
a16ba2b0 L |
695 | isv_sw: ;\r |
696 | ex (sp),hl ; save hl, return adr in hl\r | |
697 | push de ;\r | |
698 | push af ;\r | |
699 | ex de,hl ;\r | |
700 | ld hl,0 ;\r | |
701 | add hl,sp ;\r | |
702 | ld a,h ;\r | |
703 | cp 0f8h ;\r | |
704 | jr nc,isw_1 ;\r | |
705 | ld sp,$stack ;\r | |
706 | isw_1:\r | |
707 | push hl ;\r | |
708 | in0 h,(cbar) ;\r | |
709 | push hl ;\r | |
710 | ld a,SYS$CBAR ;\r | |
711 | out0 (cbar),a ;\r | |
712 | ex de,hl ;\r | |
713 | ld e,(hl) ;\r | |
714 | inc hl ;\r | |
715 | ld d,(hl) ;\r | |
716 | ex de,hl ;\r | |
717 | push bc ;\r | |
718 | call jphl ;\r | |
719 | \r | |
720 | pop bc ;\r | |
721 | pop hl ;\r | |
722 | out0 (cbar),h ;\r | |
723 | pop hl ;\r | |
724 | ld sp,hl ;\r | |
725 | pop af ;\r | |
726 | pop de ;\r | |
727 | pop hl ;\r | |
728 | ei ;\r | |
729 | ret ;\r | |
730 | jphl:\r | |
731 | jp (hl) ;\r | |
732 | \r | |
733 | ; ---------------------------------------------------------\r | |
734 | \r | |
fecee241 | 735 | if CPU_Z180\r |
4caee1ec | 736 | \r |
a16ba2b0 L |
737 | iprt0:\r |
738 | push af\r | |
739 | push hl\r | |
740 | in0 a,(tcr)\r | |
741 | in0 a,(tmdr0l)\r | |
742 | in0 a,(tmdr0h)\r | |
743 | ld a,(tim_ms)\r | |
744 | inc a\r | |
745 | cp 100\r | |
746 | jr nz,iprt_1\r | |
747 | xor a\r | |
748 | ld hl,(tim_s)\r | |
749 | inc hl\r | |
750 | ld (tim_s),hl\r | |
751 | iprt_1:\r | |
752 | ld (tim_ms),a\r | |
753 | pop hl\r | |
754 | pop af\r | |
755 | ei\r | |
756 | ret\r | |
757 | \r | |
fecee241 | 758 | endif\r |
8df5b655 | 759 | \r |
a16ba2b0 L |
760 | ; ---------------------------------------------------------\r |
761 | \r | |
762 | sp.int0:\r | |
763 | ld a,0d0h\r | |
764 | jr sp.i.1\r | |
765 | sp.int.len equ $-sp.int0\r | |
766 | ld a,0d1h\r | |
767 | jr sp.i.1\r | |
768 | ld a,0d2h\r | |
769 | jr sp.i.1\r | |
770 | ld a,0d3h\r | |
771 | jr sp.i.1\r | |
772 | ld a,0d4h\r | |
773 | jr sp.i.1\r | |
774 | ld a,0d5h\r | |
775 | jr sp.i.1\r | |
776 | ld a,0d6h\r | |
777 | jr sp.i.1\r | |
778 | ld a,0d7h\r | |
779 | jr sp.i.1\r | |
780 | ld a,0d8h\r | |
781 | sp.i.1:\r | |
782 | ; out (80h),a\r | |
783 | halt\r | |
784 | \r | |
8df5b655 L |
785 | ; ---------------------------------------------------------\r |
786 | \r | |
fecee241 | 787 | if CPU_Z80\r |
8df5b655 L |
788 | \r |
789 | ; Get IFF2\r | |
790 | ; This routine may not be loaded in page zero\r | |
791 | ;\r | |
792 | ; return Carry clear, if INTs are enabled.\r | |
793 | ;\r | |
794 | global getiff\r | |
795 | getiff:\r | |
796 | xor a ;clear accu and carry\r | |
797 | push af ;stack bottom := 00xxh\r | |
798 | pop af\r | |
799 | ld a,i ;P flag := IFF2\r | |
800 | ret pe ;exit carry clear, if enabled\r | |
801 | dec sp\r | |
802 | dec sp ;has stack bottom been overwritten?\r | |
803 | pop af\r | |
804 | and a ;if not 00xxh, INTs were\r | |
805 | ret nz ;actually enabled\r | |
806 | scf ;Otherwise, they really are disabled\r | |
807 | ret\r | |
808 | \r | |
809 | ;----------------------------------------------------------------------\r | |
810 | \r | |
811 | global selbnk\r | |
812 | \r | |
813 | ; a: bank (0..2)\r | |
814 | \r | |
815 | selbnk:\r | |
816 | push bc\r | |
817 | ld c,a\r | |
818 | call getiff\r | |
819 | push af\r | |
820 | \r | |
821 | ld a,c\r | |
822 | di\r | |
823 | ld (@cbnk),a\r | |
824 | ld a,5\r | |
825 | out (SIOAC),a\r | |
826 | ld a,(mm_sio0)\r | |
827 | rla\r | |
828 | srl c\r | |
829 | rra\r | |
830 | out (SIOAC),a\r | |
831 | ld (mm_sio0),a\r | |
832 | \r | |
833 | ld a,5\r | |
834 | out (SIOBC),a\r | |
835 | ld a,(mm_sio1)\r | |
836 | rla\r | |
837 | srl c\r | |
838 | rra\r | |
839 | out (SIOBC),a\r | |
840 | ld (mm_sio1),a\r | |
841 | pop af\r | |
842 | pop bc\r | |
843 | ret c ;INTs were disabled\r | |
844 | ei\r | |
845 | ret\r | |
846 | \r | |
847 | ;----------------------------------------------------------------------\r | |
848 | \r | |
849 | ; c: bank (0..2)\r | |
850 | \r | |
fecee241 | 851 | if 0\r |
8df5b655 L |
852 | \r |
853 | selbnk:\r | |
854 | ld a,(@cbnk)\r | |
855 | xor c\r | |
856 | and 3\r | |
857 | ret z ;no change\r | |
858 | \r | |
859 | call getiff\r | |
860 | push af\r | |
861 | ld a,c\r | |
862 | di\r | |
863 | ld (@cbnk),a\r | |
864 | ld a,5\r | |
865 | out (SIOAC),a\r | |
866 | ld a,(mm_sio0)\r | |
867 | rla\r | |
868 | srl c\r | |
869 | rra\r | |
870 | out (SIOAC),a\r | |
871 | ld (mm_sio0),a\r | |
872 | \r | |
873 | ld a,5\r | |
874 | out (SIOBC),a\r | |
875 | ld a,(mm_sio1)\r | |
876 | rla\r | |
877 | srl c\r | |
878 | rra\r | |
879 | out (SIOBC),a\r | |
880 | ld (mm_sio1),a\r | |
881 | pop af\r | |
882 | ret nc ;INTs were disabled\r | |
883 | ei\r | |
884 | ret\r | |
885 | \r | |
fecee241 | 886 | endif\r |
8df5b655 L |
887 | \r |
888 | ;----------------------------------------------------------------------\r | |
889 | \r | |
fecee241 | 890 | if 0\r |
8df5b655 L |
891 | ex af,af'\r |
892 | push af\r | |
893 | ex af,af'\r | |
894 | \r | |
895 | rra\r | |
896 | jr nc,stbk1\r | |
897 | ex af,af'\r | |
898 | ld a,5\r | |
899 | out (SIOAC),a\r | |
900 | ld a,(mm_sio0)\r | |
901 | rla\r | |
902 | srl c\r | |
903 | rra\r | |
904 | out (SIOAC),a\r | |
905 | ld (mm_sio1),a\r | |
906 | ex af,af'\r | |
907 | \r | |
908 | stbk1:\r | |
909 | rra\r | |
910 | jr nc,stbk2\r | |
911 | ex af,af'\r | |
912 | ld a,5\r | |
913 | out (SIOBC),a\r | |
914 | ld a,(mm_sio1)\r | |
915 | rla\r | |
916 | srl c\r | |
917 | rra\r | |
918 | out (SIOBC),a\r | |
919 | ld (mm_sio1),a\r | |
920 | ex af,af'\r | |
921 | \r | |
922 | stbk2:\r | |
fecee241 | 923 | endif\r |
8df5b655 L |
924 | \r |
925 | global @cbnk\r | |
926 | global mm_sio0, mm_sio1\r | |
927 | \r | |
928 | @cbnk: db 0 ; current bank (0..2)\r | |
929 | mm_sio0:\r | |
930 | ds 1\r | |
931 | mm_sio1:\r | |
932 | ds 1\r | |
933 | \r | |
934 | \r | |
fecee241 | 935 | endif\r |
8df5b655 L |
936 | \r |
937 | ;----------------------------------------------------------------------\r | |
938 | \r | |
a16ba2b0 L |
939 | curph defl $\r |
940 | .dephase\r | |
941 | sysrame:\r | |
942 | .phase curph\r | |
943 | tim_ms: db 0\r | |
944 | tim_s: dw 0\r | |
945 | .dephase\r | |
815c1735 | 946 | \r |
a16ba2b0 L |
947 | ;-----------------------------------------------------\r |
948 | \r | |
8df5b655 | 949 | \r |
a16ba2b0 L |
950 | cseg\r |
951 | \r | |
952 | ;.phase 0ffc0h\r | |
953 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
954 | ;.dephase\r | |
955 | \r | |
fecee241 L |
956 | ;.phase 0fffah\r |
957 | mark_55AA equ 0 - 2 - 4 ;2 byte for trap stack\r | |
958 | ;ds 4\r | |
a16ba2b0 L |
959 | ;.dephase\r |
960 | \r | |
961 | \r | |
962 | end\r | |
963 | \r |