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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 | \r |
9 | extrn romend\r | |
10 | \r | |
11 | \r | |
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 |
8df5b655 | 31 | iobyte: db 0\r |
a16ba2b0 L |
32 | ; restart vectors\r |
33 | \r | |
34 | rsti defl 1\r | |
35 | rept 7\r | |
8df5b655 | 36 | org 8*rsti + romstart\r |
fecee241 L |
37 | jp bpent\r |
38 | rsti defl rsti+1\r | |
a16ba2b0 L |
39 | endm\r |
40 | \r | |
41 | ;----------------------------------------------------------------------\r | |
fecee241 L |
42 | ; Config space\r |
43 | ;\r | |
44 | \r | |
8df5b655 | 45 | org romstart+40h\r |
349c01b1 L |
46 | \r |
47 | dw 0\r | |
48 | db 0\r | |
49 | \r | |
a16ba2b0 | 50 | \r |
fecee241 L |
51 | if ROMSYS\r |
52 | $crom: defb c$rom ;\r | |
53 | else\r | |
54 | db 0 ;\r | |
55 | endif\r | |
a16ba2b0 | 56 | \r |
8df5b655 | 57 | INIWAITS defl CWAITIO\r |
fecee241 | 58 | if ROMSYS\r |
8df5b655 | 59 | INIWAITS defl INIWAITS+CWAITROM\r |
fecee241 | 60 | endif\r |
8df5b655 L |
61 | \r |
62 | ;----------------------------------------------------------------------\r | |
63 | \r | |
64 | org romstart+50h\r | |
65 | start:\r | |
66 | jp cstart\r | |
67 | jp wstart\r | |
68 | jp ?const\r | |
69 | jp ?conin\r | |
70 | jp ?cono\r | |
71 | jp ?conos\r | |
72 | jp charini\r | |
73 | \r | |
74 | ;----------------------------------------------------------------------\r | |
75 | \r | |
fecee241 L |
76 | hwini0:\r |
77 | if CPU_Z180\r | |
78 | \r | |
79 | db 3 ;count\r | |
80 | db rcr,CREFSH ;configure DRAM refresh\r | |
81 | db dcntl,INIWAITS ;wait states\r | |
82 | db cbar,SYS$CBAR\r | |
83 | else\r | |
84 | db 0\r | |
85 | endif\r | |
86 | \r | |
87 | if CPU_Z180\r | |
a16ba2b0 L |
88 | dmclrt: ;clear ram per dma\r |
89 | db dmct_e-dmclrt-2 ;\r | |
90 | db sar0l ;first port\r | |
815c1735 | 91 | dw nullbyte ;src (fixed)\r |
a16ba2b0 L |
92 | nullbyte:\r |
93 | db 000h ;src\r | |
94 | dw romend ;dst (inc), start after "rom" code\r | |
95 | db 00h ;dst\r | |
96 | dw 0-romend ;count (64k)\r | |
97 | dmct_e:\r | |
fecee241 L |
98 | endif\r |
99 | \r | |
a16ba2b0 | 100 | \r |
8df5b655 | 101 | cstart:\r |
fecee241 | 102 | if CPU_Z180\r |
a16ba2b0 | 103 | \r |
30d1329e L |
104 | push af\r |
105 | in0 a,(itc) ;Illegal opcode trap?\r | |
106 | jp m,??st01\r | |
107 | ld a,i ;I register == 0 ?\r | |
fecee241 | 108 | jr z,hw_reset ; yes, harware reset\r |
a16ba2b0 L |
109 | \r |
110 | ??st01:\r | |
fecee241 | 111 | ; TODO: SYS$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 L |
167 | ld hl,dmclrt ;load DMA registers\r |
168 | call io.ini.m\r | |
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 | |
437 | call io.ini.m\r | |
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 | |
fecee241 | 447 | endif\r |
a16ba2b0 | 448 | \r |
4caee1ec | 449 | \r |
a16ba2b0 L |
450 | ;\r |
451 | ;----------------------------------------------------------------------\r | |
452 | ;\r | |
453 | \r | |
454 | io.ini:\r | |
455 | push bc\r | |
fecee241 | 456 | if CPU_Z180\r |
8df5b655 | 457 | \r |
a16ba2b0 L |
458 | ld b,0 ;high byte port adress\r |
459 | ld a,(hl) ;count\r | |
460 | inc hl\r | |
8df5b655 L |
461 | or a\r |
462 | jr z,ioi_e\r | |
a16ba2b0 L |
463 | ioi_1:\r |
464 | ld c,(hl) ;port address\r | |
465 | inc hl\r | |
466 | outi\r | |
467 | inc b ;outi decrements b\r | |
468 | dec a\r | |
469 | jr nz,ioi_1\r | |
fecee241 L |
470 | ioi_e: \r |
471 | else\r | |
8df5b655 L |
472 | jr ioi_nxt\r |
473 | ioi_l:\r | |
474 | ld c,(hl) ;port address\r | |
475 | inc hl\r | |
476 | otir\r | |
477 | ioi_nxt:\r | |
478 | ld b,(hl) ;count\r | |
479 | inc hl\r | |
480 | inc b\r | |
481 | djnz ioi_l\r | |
fecee241 | 482 | endif\r |
a16ba2b0 L |
483 | pop bc\r |
484 | ret\r | |
485 | \r | |
fecee241 | 486 | if CPU_Z180\r |
a16ba2b0 L |
487 | io.ini.m:\r |
488 | push bc\r | |
489 | ld b,(hl)\r | |
490 | inc hl\r | |
491 | ld c,(hl)\r | |
492 | inc hl\r | |
815c1735 L |
493 | otimr\r |
494 | pop bc\r | |
a16ba2b0 | 495 | ret\r |
fecee241 | 496 | endif\r |
815c1735 | 497 | \r |
a16ba2b0 L |
498 | io.ini.l:\r |
499 | ;\r | |
500 | \r | |
a16ba2b0 | 501 | \r |
a16ba2b0 | 502 | \r |
4caee1ec | 503 | ;----------------------------------------------------------------------\r |
a16ba2b0 | 504 | ;\r |
fecee241 | 505 | if CPU_Z180\r |
a16ba2b0 | 506 | \r |
fecee241 L |
507 | ; a: Bank number\r |
508 | ;\r | |
509 | ; out a: bbr value\r | |
a16ba2b0 | 510 | \r |
fecee241 L |
511 | bnk2log:\r |
512 | push bc\r | |
513 | ld b,a\r | |
514 | ld c,CA\r | |
515 | mlt bc\r | |
516 | add a,10h\r | |
517 | pop bc\r | |
518 | ret\r | |
a16ba2b0 | 519 | \r |
a16ba2b0 L |
520 | ; de: Log. Address\r |
521 | ; a: Bank number\r | |
522 | ;\r | |
523 | ;out ahl: Phys. (linear) Address\r | |
524 | \r | |
525 | \r | |
526 | bnk2phys:\r | |
fecee241 | 527 | call bnk2log\r |
a16ba2b0 L |
528 | \r |
529 | ; fall thru\r | |
530 | ;--------------------------------------------------------------\r | |
531 | ;\r | |
532 | ; de: Log. Address\r | |
fecee241 | 533 | ; a: Bank base (bbr)\r |
a16ba2b0 L |
534 | ;\r |
535 | ; OP: ahl = (a<<12) + (d<<8) + e\r | |
536 | ;\r | |
4caee1ec | 537 | ;out ahl: Phys. (linear) Address\r |
a16ba2b0 L |
538 | \r |
539 | \r | |
540 | log2phys:\r | |
541 | push bc ;\r | |
542 | ld c,a ;\r | |
543 | ld b,16 ;\r | |
fecee241 L |
544 | mlt bc ; bc = a<<4\r |
545 | ld l,d ;4\r | |
546 | ld h,0 ;6\r | |
547 | add hl,bc ;7 bc + d == a<<4 + d\r | |
548 | ld a,h ;4\r | |
549 | ld h,l ;4\r | |
550 | ld l,e ;4\r | |
a16ba2b0 L |
551 | pop bc ;\r |
552 | ret ;\r | |
553 | \r | |
fecee241 L |
554 | if 0\r |
555 | \r | |
556 | log2phys:\r | |
557 | push bc ;\r | |
558 | ld b,a ;\r | |
559 | ld c,16 ;\r | |
560 | mlt bc ; bc = a<<4\r | |
561 | ld a,c ;4\r | |
562 | add a,h ;4\r | |
563 | ld h,a ;4\r | |
564 | ld a,b ;4\r | |
565 | adc a,0 ;6\r | |
566 | pop bc ;\r | |
567 | ret ;\r | |
568 | \r | |
569 | endif\r | |
8df5b655 L |
570 | ;--------------------------------------------------------------\r |
571 | ;\r | |
572 | ; de: Log. Address\r | |
573 | ; \r | |
574 | ;\r | |
575 | ; OP: ahl = (bankbase<<12) + (d<<8) + e\r | |
576 | ;\r | |
577 | ;out ahl: Phys. (linear) Address\r | |
578 | \r | |
579 | \r | |
580 | hw_log2phys:\r | |
581 | push bc ;\r | |
582 | in0 c,(cbar)\r | |
583 | ld a,d\r | |
584 | or 00fh\r | |
585 | cp c\r | |
586 | jr c,hlp_1\r | |
587 | in0 c,(cbr)\r | |
588 | jr hlp_e\r | |
589 | hlp_1:\r | |
590 | ld b,16\r | |
591 | mlt bc\r | |
592 | ld a,d\r | |
593 | cp c\r | |
594 | ld c,0\r | |
595 | jr c,hlp_e\r | |
596 | in0 c,(bbr)\r | |
597 | hlp_e: \r | |
598 | ld b,16 ;\r | |
599 | mlt bc ;bc = a<<4\r | |
600 | ld l,d ;\r | |
601 | ld h,0 ;\r | |
602 | add hl,bc ;bc + d == a<<4 + d\r | |
603 | ld a,h ;\r | |
604 | ld h,l ;\r | |
605 | ld l,e ;\r | |
606 | pop bc ;\r | |
607 | ret ;\r | |
608 | \r | |
fecee241 | 609 | else\r |
8df5b655 L |
610 | \r |
611 | ;\r | |
612 | ;----------------------------------------------------------------------\r | |
613 | ;\r | |
614 | \r | |
615 | bnk2phys:\r | |
616 | sla h\r | |
617 | jr nc,b2p_1 ;A15=1 --> common\r | |
618 | ld a,3\r | |
619 | b2p_1:\r | |
620 | srl a\r | |
621 | rr h\r | |
622 | ret\r | |
623 | \r | |
fecee241 | 624 | endif\r |
a16ba2b0 L |
625 | \r |
626 | ;--------------------------------------------------------------\r | |
627 | ;\r | |
628 | ;return:\r | |
629 | ; hl = hl + a\r | |
630 | ; Flags undefined\r | |
631 | ;\r | |
632 | \r | |
633 | add_hl_a:\r | |
815c1735 L |
634 | add a,l\r |
635 | ld l,a\r | |
636 | ret nc\r | |
637 | inc h\r | |
638 | ret\r | |
a16ba2b0 L |
639 | \r |
640 | ; ---------------------------------------------------------\r | |
641 | \r | |
642 | sysramw:\r | |
643 | \r | |
644 | .phase isvsw_loc\r | |
645 | topcodsys:\r | |
646 | \r | |
647 | ; Trampoline for interrupt routines in banked ram.\r | |
648 | ; Switch stack pointer to "system" stack in top ram\r | |
649 | ; Save cbar\r | |
815c1735 | 650 | \r |
a16ba2b0 L |
651 | isv_sw: ;\r |
652 | ex (sp),hl ; save hl, return adr in hl\r | |
653 | push de ;\r | |
654 | push af ;\r | |
655 | ex de,hl ;\r | |
656 | ld hl,0 ;\r | |
657 | add hl,sp ;\r | |
658 | ld a,h ;\r | |
659 | cp 0f8h ;\r | |
660 | jr nc,isw_1 ;\r | |
661 | ld sp,$stack ;\r | |
662 | isw_1:\r | |
663 | push hl ;\r | |
664 | in0 h,(cbar) ;\r | |
665 | push hl ;\r | |
666 | ld a,SYS$CBAR ;\r | |
667 | out0 (cbar),a ;\r | |
668 | ex de,hl ;\r | |
669 | ld e,(hl) ;\r | |
670 | inc hl ;\r | |
671 | ld d,(hl) ;\r | |
672 | ex de,hl ;\r | |
673 | push bc ;\r | |
674 | call jphl ;\r | |
675 | \r | |
676 | pop bc ;\r | |
677 | pop hl ;\r | |
678 | out0 (cbar),h ;\r | |
679 | pop hl ;\r | |
680 | ld sp,hl ;\r | |
681 | pop af ;\r | |
682 | pop de ;\r | |
683 | pop hl ;\r | |
684 | ei ;\r | |
685 | ret ;\r | |
686 | jphl:\r | |
687 | jp (hl) ;\r | |
688 | \r | |
689 | ; ---------------------------------------------------------\r | |
690 | \r | |
fecee241 | 691 | if CPU_Z180\r |
4caee1ec | 692 | \r |
a16ba2b0 L |
693 | iprt0:\r |
694 | push af\r | |
695 | push hl\r | |
696 | in0 a,(tcr)\r | |
697 | in0 a,(tmdr0l)\r | |
698 | in0 a,(tmdr0h)\r | |
699 | ld a,(tim_ms)\r | |
700 | inc a\r | |
701 | cp 100\r | |
702 | jr nz,iprt_1\r | |
703 | xor a\r | |
704 | ld hl,(tim_s)\r | |
705 | inc hl\r | |
706 | ld (tim_s),hl\r | |
707 | iprt_1:\r | |
708 | ld (tim_ms),a\r | |
709 | pop hl\r | |
710 | pop af\r | |
711 | ei\r | |
712 | ret\r | |
713 | \r | |
fecee241 | 714 | endif\r |
8df5b655 | 715 | \r |
a16ba2b0 L |
716 | ; ---------------------------------------------------------\r |
717 | \r | |
718 | sp.int0:\r | |
719 | ld a,0d0h\r | |
720 | jr sp.i.1\r | |
721 | sp.int.len equ $-sp.int0\r | |
722 | ld a,0d1h\r | |
723 | jr sp.i.1\r | |
724 | ld a,0d2h\r | |
725 | jr sp.i.1\r | |
726 | ld a,0d3h\r | |
727 | jr sp.i.1\r | |
728 | ld a,0d4h\r | |
729 | jr sp.i.1\r | |
730 | ld a,0d5h\r | |
731 | jr sp.i.1\r | |
732 | ld a,0d6h\r | |
733 | jr sp.i.1\r | |
734 | ld a,0d7h\r | |
735 | jr sp.i.1\r | |
736 | ld a,0d8h\r | |
737 | sp.i.1:\r | |
738 | ; out (80h),a\r | |
739 | halt\r | |
740 | \r | |
8df5b655 L |
741 | ; ---------------------------------------------------------\r |
742 | \r | |
fecee241 | 743 | if CPU_Z80\r |
8df5b655 L |
744 | \r |
745 | ; Get IFF2\r | |
746 | ; This routine may not be loaded in page zero\r | |
747 | ;\r | |
748 | ; return Carry clear, if INTs are enabled.\r | |
749 | ;\r | |
750 | global getiff\r | |
751 | getiff:\r | |
752 | xor a ;clear accu and carry\r | |
753 | push af ;stack bottom := 00xxh\r | |
754 | pop af\r | |
755 | ld a,i ;P flag := IFF2\r | |
756 | ret pe ;exit carry clear, if enabled\r | |
757 | dec sp\r | |
758 | dec sp ;has stack bottom been overwritten?\r | |
759 | pop af\r | |
760 | and a ;if not 00xxh, INTs were\r | |
761 | ret nz ;actually enabled\r | |
762 | scf ;Otherwise, they really are disabled\r | |
763 | ret\r | |
764 | \r | |
765 | ;----------------------------------------------------------------------\r | |
766 | \r | |
767 | global selbnk\r | |
768 | \r | |
769 | ; a: bank (0..2)\r | |
770 | \r | |
771 | selbnk:\r | |
772 | push bc\r | |
773 | ld c,a\r | |
774 | call getiff\r | |
775 | push af\r | |
776 | \r | |
777 | ld a,c\r | |
778 | di\r | |
779 | ld (@cbnk),a\r | |
780 | ld a,5\r | |
781 | out (SIOAC),a\r | |
782 | ld a,(mm_sio0)\r | |
783 | rla\r | |
784 | srl c\r | |
785 | rra\r | |
786 | out (SIOAC),a\r | |
787 | ld (mm_sio0),a\r | |
788 | \r | |
789 | ld a,5\r | |
790 | out (SIOBC),a\r | |
791 | ld a,(mm_sio1)\r | |
792 | rla\r | |
793 | srl c\r | |
794 | rra\r | |
795 | out (SIOBC),a\r | |
796 | ld (mm_sio1),a\r | |
797 | pop af\r | |
798 | pop bc\r | |
799 | ret c ;INTs were disabled\r | |
800 | ei\r | |
801 | ret\r | |
802 | \r | |
803 | ;----------------------------------------------------------------------\r | |
804 | \r | |
805 | ; c: bank (0..2)\r | |
806 | \r | |
fecee241 | 807 | if 0\r |
8df5b655 L |
808 | \r |
809 | selbnk:\r | |
810 | ld a,(@cbnk)\r | |
811 | xor c\r | |
812 | and 3\r | |
813 | ret z ;no change\r | |
814 | \r | |
815 | call getiff\r | |
816 | push af\r | |
817 | ld a,c\r | |
818 | di\r | |
819 | ld (@cbnk),a\r | |
820 | ld a,5\r | |
821 | out (SIOAC),a\r | |
822 | ld a,(mm_sio0)\r | |
823 | rla\r | |
824 | srl c\r | |
825 | rra\r | |
826 | out (SIOAC),a\r | |
827 | ld (mm_sio0),a\r | |
828 | \r | |
829 | ld a,5\r | |
830 | out (SIOBC),a\r | |
831 | ld a,(mm_sio1)\r | |
832 | rla\r | |
833 | srl c\r | |
834 | rra\r | |
835 | out (SIOBC),a\r | |
836 | ld (mm_sio1),a\r | |
837 | pop af\r | |
838 | ret nc ;INTs were disabled\r | |
839 | ei\r | |
840 | ret\r | |
841 | \r | |
fecee241 | 842 | endif\r |
8df5b655 L |
843 | \r |
844 | ;----------------------------------------------------------------------\r | |
845 | \r | |
fecee241 | 846 | if 0\r |
8df5b655 L |
847 | ex af,af'\r |
848 | push af\r | |
849 | ex af,af'\r | |
850 | \r | |
851 | rra\r | |
852 | jr nc,stbk1\r | |
853 | ex af,af'\r | |
854 | ld a,5\r | |
855 | out (SIOAC),a\r | |
856 | ld a,(mm_sio0)\r | |
857 | rla\r | |
858 | srl c\r | |
859 | rra\r | |
860 | out (SIOAC),a\r | |
861 | ld (mm_sio1),a\r | |
862 | ex af,af'\r | |
863 | \r | |
864 | stbk1:\r | |
865 | rra\r | |
866 | jr nc,stbk2\r | |
867 | ex af,af'\r | |
868 | ld a,5\r | |
869 | out (SIOBC),a\r | |
870 | ld a,(mm_sio1)\r | |
871 | rla\r | |
872 | srl c\r | |
873 | rra\r | |
874 | out (SIOBC),a\r | |
875 | ld (mm_sio1),a\r | |
876 | ex af,af'\r | |
877 | \r | |
878 | stbk2:\r | |
fecee241 | 879 | endif\r |
8df5b655 L |
880 | \r |
881 | global @cbnk\r | |
882 | global mm_sio0, mm_sio1\r | |
883 | \r | |
884 | @cbnk: db 0 ; current bank (0..2)\r | |
885 | mm_sio0:\r | |
886 | ds 1\r | |
887 | mm_sio1:\r | |
888 | ds 1\r | |
889 | \r | |
890 | \r | |
fecee241 | 891 | endif\r |
8df5b655 L |
892 | \r |
893 | ;----------------------------------------------------------------------\r | |
894 | \r | |
a16ba2b0 L |
895 | curph defl $\r |
896 | .dephase\r | |
897 | sysrame:\r | |
898 | .phase curph\r | |
899 | tim_ms: db 0\r | |
900 | tim_s: dw 0\r | |
901 | .dephase\r | |
815c1735 | 902 | \r |
a16ba2b0 L |
903 | ;-----------------------------------------------------\r |
904 | \r | |
8df5b655 | 905 | \r |
a16ba2b0 L |
906 | cseg\r |
907 | \r | |
908 | ;.phase 0ffc0h\r | |
909 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
910 | ;.dephase\r | |
911 | \r | |
fecee241 L |
912 | ;.phase 0fffah\r |
913 | mark_55AA equ 0 - 2 - 4 ;2 byte for trap stack\r | |
914 | ;ds 4\r | |
a16ba2b0 L |
915 | ;.dephase\r |
916 | \r | |
917 | \r | |
918 | end\r | |
919 | \r |