cc68a136 |
1 | // This is part of Pico Library\r |
2 | \r |
3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
4 | // (c) Copyright 2006 notaz, All rights reserved.\r |
5 | // Free for non-commercial use.\r |
6 | \r |
7 | // For commercial use, separate licencing terms must be obtained.\r |
8 | \r |
9 | // A68K no longer supported here\r |
10 | \r |
11 | //#define __debug_io\r |
12 | \r |
13 | #include "../PicoInt.h"\r |
14 | \r |
15 | #include "../sound/sound.h"\r |
16 | #include "../sound/ym2612.h"\r |
17 | #include "../sound/sn76496.h"\r |
18 | \r |
19 | typedef unsigned char u8;\r |
20 | typedef unsigned short u16;\r |
21 | typedef unsigned int u32;\r |
22 | \r |
23 | //#define __debug_io\r |
24 | //#define __debug_io2\r |
25 | \r |
26 | // -----------------------------------------------------------------\r |
27 | \r |
8c1952f0 |
28 | // extern m68ki_cpu_core m68ki_cpu;\r |
cc68a136 |
29 | \r |
30 | extern int counter75hz;\r |
31 | \r |
32 | \r |
33 | static u32 m68k_reg_read16(u32 a, int realsize)\r |
34 | {\r |
35 | u32 d=0;\r |
36 | a &= 0x3e;\r |
37 | dprintf("m68k_regs r%2i: [%02x] @%06x", realsize&~1, a+(realsize&1), SekPc);\r |
38 | \r |
39 | switch (a) {\r |
40 | case 2:\r |
41 | d = (Pico_mcd->m68k_regs[a]<<8) | Pico_mcd->m68k_regs[a+1] | 1; // for now 2M to m68k\r |
42 | goto end;\r |
43 | case 8:\r |
44 | dprintf("m68k host data read");\r |
45 | d = Read_CDC_Host(0);\r |
46 | goto end;\r |
47 | case 0xC:\r |
48 | dprintf("m68k stopwatch read");\r |
49 | break;\r |
50 | }\r |
51 | \r |
52 | if (a < 0xE) {\r |
53 | d = (Pico_mcd->m68k_regs[a]<<8) | Pico_mcd->m68k_regs[a+1];\r |
54 | goto end;\r |
55 | }\r |
56 | \r |
57 | if (a < 0x30) {\r |
58 | // comm flag/cmd/status (0xE-0x2F)\r |
59 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
60 | goto end;\r |
61 | }\r |
62 | \r |
63 | dprintf("m68k_regs invalid read @ %02x", a);\r |
64 | \r |
65 | end:\r |
66 | \r |
67 | dprintf("ret = %04x", d);\r |
68 | return d;\r |
69 | }\r |
70 | \r |
71 | static void m68k_reg_write8(u32 a, u32 d, int realsize)\r |
72 | {\r |
73 | a &= 0x3f;\r |
74 | dprintf("m68k_regs w%2i: [%02x] %02x @%06x", realsize, a, d, SekPc);\r |
75 | \r |
76 | switch (a) {\r |
77 | case 0:\r |
78 | if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { dprintf("m68k: s68k irq 2"); SekInterruptS68k(2); }\r |
79 | break;\r |
80 | case 1:\r |
81 | if (!(d&1)) PicoMCD |= 2; // reset pending, needed to be sure we fetch the right vectors on reset\r |
82 | if ( (Pico_mcd->m68k_regs[1]&1) != (d&1)) dprintf("m68k: s68k reset %i", !(d&1));\r |
83 | if ( (Pico_mcd->m68k_regs[1]&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);\r |
84 | if (/*!(Pico_mcd->m68k_regs[1]&1) &&*/ (PicoMCD&2) && (d&3)==1) {\r |
85 | SekResetS68k(); // S68k comes out of RESET or BRQ state\r |
86 | PicoMCD&=~2;\r |
87 | dprintf("m68k: resetting s68k");\r |
88 | }\r |
89 | break;\r |
90 | case 3:\r |
91 | if ((Pico_mcd->m68k_regs[3]>>6) != ((d>>6)&3))\r |
92 | dprintf("m68k: prg bank: %i -> %i", (Pico_mcd->m68k_regs[a]>>6), ((d>>6)&3));\r |
93 | if ((Pico_mcd->m68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);\r |
94 | if ((Pico_mcd->m68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :\r |
95 | ((d&2) ? "word ram to s68k" : "word ram to m68k"));\r |
96 | break;\r |
97 | case 0xe:\r |
98 | dprintf("m68k: comm flag: %02x", d);\r |
99 | \r |
100 | dprintf("s68k @ %06x", SekPcS68k);\r |
101 | \r |
102 | Pico_mcd->s68k_regs[0xe] = d;\r |
103 | break;\r |
104 | }\r |
105 | \r |
106 | if ((a&0xff) == 0x10) {\r |
107 | Pico_mcd->s68k_regs[a] = d;\r |
108 | }\r |
109 | \r |
110 | if (a >= 0x20 || (a >= 0xa && a <= 0xd) || a == 0x0f)\r |
111 | dprintf("m68k: invalid write?");\r |
112 | \r |
113 | if (a < 0x10)\r |
114 | Pico_mcd->m68k_regs[a] = (u8) d;\r |
115 | }\r |
116 | \r |
117 | \r |
118 | \r |
119 | static u32 s68k_reg_read16(u32 a, int realsize)\r |
120 | {\r |
121 | u32 d=0;\r |
122 | a &= 0x1fe;\r |
123 | \r |
124 | dprintf("s68k_regs r%2i: [%02x] @ %06x", realsize&~1, a+(realsize&1), SekPcS68k);\r |
125 | \r |
126 | switch (a) {\r |
127 | case 0:\r |
128 | d = 1; goto end; // ver = 0, not in reset state\r |
129 | case 6:\r |
130 | d = CDC_Read_Reg();\r |
131 | goto end;\r |
132 | case 8:\r |
133 | dprintf("s68k host data read");\r |
134 | d = Read_CDC_Host(1);\r |
135 | goto end;\r |
136 | case 0xC:\r |
137 | dprintf("s68k stopwatch read");\r |
138 | break;\r |
139 | case 0x34: // fader\r |
140 | d = 0; // no busy bit\r |
141 | goto end;\r |
142 | }\r |
143 | \r |
144 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
145 | \r |
146 | end:\r |
147 | \r |
148 | dprintf("ret = %04x", d);\r |
149 | \r |
150 | return d;\r |
151 | }\r |
152 | \r |
153 | static void s68k_reg_write8(u32 a, u32 d, int realsize)\r |
154 | {\r |
155 | a &= 0x1ff;\r |
156 | dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);\r |
157 | \r |
158 | // TODO: review against Gens\r |
159 | switch (a) {\r |
160 | case 4:\r |
161 | dprintf("s68k CDC dest: %x", d&7);\r |
162 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
163 | return;\r |
164 | case 5:\r |
165 | dprintf("s68k CDC reg addr: %x", d&0xf);\r |
166 | break;\r |
167 | case 7:\r |
168 | CDC_Write_Reg(d);\r |
169 | return;\r |
170 | case 0xa:\r |
171 | dprintf("s68k set CDC dma addr");\r |
172 | break;\r |
173 | case 0x33: // IRQ mask\r |
174 | dprintf("s68k irq mask: %02x", d);\r |
175 | if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {\r |
176 | CDD_Export_Status();\r |
177 | // counter75hz = 0; // ???\r |
178 | }\r |
179 | break;\r |
180 | case 0x34: // fader\r |
181 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
182 | return;\r |
183 | case 0x37:\r |
184 | if ((d&4) && !(Pico_mcd->s68k_regs[0x37]&4)) {\r |
185 | CDD_Export_Status();\r |
186 | // counter75hz = 0; // ???\r |
187 | }\r |
188 | break;\r |
189 | case 0x4b:\r |
190 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
191 | CDD_Import_Command();\r |
192 | return;\r |
193 | }\r |
194 | \r |
195 | if ((a&0x1f0) == 0x10 || a == 0x0e || (a >= 0x38 && a < 0x42))\r |
196 | {\r |
197 | dprintf("m68k: invalid write @ %02x?", a);\r |
198 | return;\r |
199 | }\r |
200 | \r |
201 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
202 | }\r |
203 | \r |
204 | \r |
205 | \r |
206 | \r |
207 | \r |
208 | static int PadRead(int i)\r |
209 | {\r |
210 | int pad=0,value=0,TH;\r |
211 | pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU\r |
212 | TH=Pico.ioports[i+1]&0x40;\r |
213 | \r |
214 | if(PicoOpt & 0x20) { // 6 button gamepad enabled\r |
215 | int phase = Pico.m.padTHPhase[i];\r |
216 | \r |
217 | if(phase == 2 && !TH) {\r |
218 | value=(pad&0xc0)>>2; // ?0SA 0000\r |
219 | goto end;\r |
220 | } else if(phase == 3 && TH) {\r |
221 | value=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ\r |
222 | goto end;\r |
223 | } else if(phase == 3 && !TH) {\r |
224 | value=((pad&0xc0)>>2)|0x0f; // ?0SA 1111\r |
225 | goto end;\r |
226 | }\r |
227 | }\r |
228 | \r |
229 | if(TH) value=(pad&0x3f); // ?1CB RLDU\r |
230 | else value=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU\r |
231 | \r |
232 | end:\r |
233 | \r |
234 | // orr the bits, which are set as output\r |
235 | value |= Pico.ioports[i+1]&Pico.ioports[i+4];\r |
236 | \r |
237 | return value; // will mirror later\r |
238 | }\r |
239 | \r |
240 | static u8 z80Read8(u32 a)\r |
241 | {\r |
242 | if(Pico.m.z80Run&1) return 0;\r |
243 | \r |
244 | a&=0x1fff;\r |
245 | \r |
246 | if(!(PicoOpt&4)) {\r |
247 | // Z80 disabled, do some faking\r |
248 | static u8 zerosent = 0;\r |
249 | if(a == Pico.m.z80_lastaddr) { // probably polling something\r |
250 | u8 d = Pico.m.z80_fakeval;\r |
251 | if((d & 0xf) == 0xf && !zerosent) {\r |
252 | d = 0; zerosent = 1;\r |
253 | } else {\r |
254 | Pico.m.z80_fakeval++;\r |
255 | zerosent = 0;\r |
256 | }\r |
257 | return d;\r |
258 | } else {\r |
259 | Pico.m.z80_fakeval = 0;\r |
260 | }\r |
261 | }\r |
262 | \r |
263 | Pico.m.z80_lastaddr = (u16) a;\r |
264 | return Pico.zram[a];\r |
265 | }\r |
266 | \r |
267 | \r |
268 | // for nonstandard reads\r |
269 | static u32 UnusualRead16(u32 a, int realsize)\r |
270 | {\r |
271 | u32 d=0;\r |
272 | \r |
273 | dprintf("unusual r%i: %06x @%06x", realsize&~1, (a&0xfffffe)+(realsize&1), SekPc);\r |
274 | \r |
275 | \r |
276 | dprintf("ret = %04x", d);\r |
277 | return d;\r |
278 | }\r |
279 | \r |
280 | static u32 OtherRead16(u32 a, int realsize)\r |
281 | {\r |
282 | u32 d=0;\r |
283 | \r |
284 | if ((a&0xff0000)==0xa00000) {\r |
285 | if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)\r |
286 | if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; goto end; } // 0x4000-0x5fff, Fudge if disabled\r |
287 | d=0xffff; goto end;\r |
288 | }\r |
289 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
290 | a=(a>>1)&0xf;\r |
291 | switch(a) {\r |
292 | case 0: d=Pico.m.hardware; break; // Hardware value (Version register)\r |
293 | case 1: d=PadRead(0); d|=Pico.ioports[1]&0x80; break;\r |
294 | case 2: d=PadRead(1); d|=Pico.ioports[2]&0x80; break;\r |
295 | default: d=Pico.ioports[a]; break; // IO ports can be used as RAM\r |
296 | }\r |
297 | d|=d<<8;\r |
298 | goto end;\r |
299 | }\r |
300 | // |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers\r |
301 | if (a==0xa11100) { d=((Pico.m.z80Run&1)<<8)|0x8000|Pico.m.rotate++; goto end; }\r |
302 | \r |
303 | if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }\r |
304 | \r |
305 | if ((a&0xffffc0)==0xa12000) { d=m68k_reg_read16(a, realsize); goto end; }\r |
306 | \r |
307 | d = UnusualRead16(a, realsize);\r |
308 | \r |
309 | end:\r |
310 | return d;\r |
311 | }\r |
312 | \r |
313 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
314 | \r |
315 | static void OtherWrite8(u32 a,u32 d,int realsize)\r |
316 | {\r |
317 | if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound\r |
318 | if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram\r |
319 | if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound\r |
320 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
321 | a=(a>>1)&0xf;\r |
322 | // 6 button gamepad: if TH went from 0 to 1, gamepad changes state\r |
323 | if(PicoOpt&0x20) {\r |
324 | if(a==1) {\r |
325 | Pico.m.padDelay[0] = 0;\r |
326 | if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;\r |
327 | }\r |
328 | else if(a==2) {\r |
329 | Pico.m.padDelay[1] = 0;\r |
330 | if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;\r |
331 | }\r |
332 | }\r |
333 | Pico.ioports[a]=(u8)d; // IO ports can be used as RAM\r |
334 | return;\r |
335 | }\r |
336 | if (a==0xa11100) {\r |
337 | extern int z80startCycle, z80stopCycle;\r |
338 | //int lineCycles=(488-SekCyclesLeft)&0x1ff;\r |
339 | d&=1; d^=1;\r |
340 | if(!d) {\r |
341 | // hack: detect a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)\r |
342 | if((PicoOpt&4) && Pico.m.z80Run==1) z80_run(20);\r |
343 | z80stopCycle = SekCyclesDone();\r |
344 | //z80ExtraCycles += (lineCycles>>1)-(lineCycles>>5); // only meaningful in PicoFrameHints()\r |
345 | } else {\r |
346 | z80startCycle = SekCyclesDone();\r |
347 | //if(Pico.m.scanline != -1)\r |
348 | //z80ExtraCycles -= (lineCycles>>1)-(lineCycles>>5)+16;\r |
349 | }\r |
350 | //dprintf("set_zrun: %i [%i|%i] zPC=%04x @%06x", d, Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0), SekPc);\r |
351 | Pico.m.z80Run=(u8)d; return;\r |
352 | }\r |
353 | if (a==0xa11200) { if(!(d&1)) z80_reset(); return; }\r |
354 | \r |
355 | if ((a&0xff7f00)==0xa06000) // Z80 BANK register\r |
356 | {\r |
357 | Pico.m.z80_bank68k>>=1;\r |
358 | Pico.m.z80_bank68k|=(d&1)<<8;\r |
359 | Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one\r |
360 | return;\r |
361 | }\r |
362 | \r |
363 | if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)(d|(d<<8))); return; } // Byte access gets mirrored\r |
364 | \r |
365 | if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d, realsize); return; }\r |
366 | \r |
367 | dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
368 | }\r |
369 | \r |
370 | static void OtherWrite16(u32 a,u32 d)\r |
371 | {\r |
372 | if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; }\r |
373 | if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only)\r |
374 | \r |
375 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
376 | a=(a>>1)&0xf;\r |
377 | // 6 button gamepad: if TH went from 0 to 1, gamepad changes state\r |
378 | if(PicoOpt&0x20) {\r |
379 | if(a==1) {\r |
380 | Pico.m.padDelay[0] = 0;\r |
381 | if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;\r |
382 | }\r |
383 | else if(a==2) {\r |
384 | Pico.m.padDelay[1] = 0;\r |
385 | if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;\r |
386 | }\r |
387 | }\r |
388 | Pico.ioports[a]=(u8)d; // IO ports can be used as RAM\r |
389 | return;\r |
390 | }\r |
391 | if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; }\r |
392 | if (a==0xa11200) { if(!(d&0x100)) z80_reset(); return; }\r |
393 | \r |
394 | OtherWrite8(a, d>>8, 16);\r |
395 | OtherWrite8(a+1,d&0xff, 16);\r |
396 | }\r |
397 | \r |
398 | // -----------------------------------------------------------------\r |
399 | // Read Rom and read Ram\r |
400 | \r |
401 | u8 PicoReadM68k8(u32 a)\r |
402 | {\r |
403 | u32 d=0;\r |
404 | \r |
405 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
406 | \r |
407 | a&=0xffffff;\r |
408 | \r |
409 | if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios\r |
410 | \r |
411 | // prg RAM\r |
412 | if ((a&0xfe0000)==0x020000) {\r |
413 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
414 | d = *(prg_bank+((a^1)&0x1ffff));\r |
415 | goto end;\r |
416 | }\r |
417 | \r |
418 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
419 | \r |
420 | d=OtherRead16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;\r |
421 | \r |
422 | end:\r |
423 | \r |
424 | #ifdef __debug_io\r |
425 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
426 | #endif\r |
427 | return (u8)d;\r |
428 | }\r |
429 | \r |
430 | u16 PicoReadM68k16(u32 a)\r |
431 | {\r |
432 | u16 d=0;\r |
433 | \r |
434 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
435 | \r |
436 | a&=0xfffffe;\r |
437 | \r |
438 | if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios\r |
439 | \r |
440 | // prg RAM\r |
441 | if ((a&0xfe0000)==0x020000) {\r |
442 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
443 | d = *(u16 *)(prg_bank+(a&0x1fffe));\r |
444 | goto end;\r |
445 | }\r |
446 | \r |
447 | d = (u16)OtherRead16(a, 16);\r |
448 | \r |
449 | end:\r |
450 | \r |
451 | #ifdef __debug_io\r |
452 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
453 | #endif\r |
454 | return d;\r |
455 | }\r |
456 | \r |
457 | u32 PicoReadM68k32(u32 a)\r |
458 | {\r |
459 | u32 d=0;\r |
460 | \r |
461 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
462 | \r |
463 | a&=0xfffffe;\r |
464 | \r |
465 | if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios\r |
466 | \r |
467 | // prg RAM\r |
468 | if ((a&0xfe0000)==0x020000) {\r |
469 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
470 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
471 | d = (pm[0]<<16)|pm[1];\r |
472 | goto end;\r |
473 | }\r |
474 | \r |
475 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
476 | \r |
477 | end:\r |
478 | #ifdef __debug_io\r |
479 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
480 | #endif\r |
481 | return d;\r |
482 | }\r |
483 | \r |
484 | // -----------------------------------------------------------------\r |
485 | // Write Ram\r |
486 | \r |
487 | void PicoWriteM68k8(u32 a,u8 d)\r |
488 | {\r |
489 | #ifdef __debug_io\r |
490 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
491 | #endif\r |
492 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
493 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
494 | \r |
495 | \r |
496 | if ((a&0xe00000)==0xe00000) { u8 *pm=(u8 *)(Pico.ram+((a^1)&0xffff)); pm[0]=d; return; } // Ram\r |
497 | \r |
498 | a&=0xffffff;\r |
499 | \r |
500 | // prg RAM\r |
501 | if ((a&0xfe0000)==0x020000) {\r |
502 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
503 | u8 *pm=(u8 *)(prg_bank+((a^1)&0x1ffff));\r |
504 | *pm=d;\r |
505 | return;\r |
506 | }\r |
507 | \r |
508 | OtherWrite8(a,d,8);\r |
509 | }\r |
510 | \r |
511 | void PicoWriteM68k16(u32 a,u16 d)\r |
512 | {\r |
513 | #ifdef __debug_io\r |
514 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
515 | #endif\r |
516 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
517 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
518 | \r |
519 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram\r |
520 | \r |
521 | a&=0xfffffe;\r |
522 | \r |
523 | // prg RAM\r |
524 | if ((a&0xfe0000)==0x020000) {\r |
525 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
526 | *(u16 *)(prg_bank+(a&0x1fffe))=d;\r |
527 | return;\r |
528 | }\r |
529 | \r |
530 | \r |
531 | OtherWrite16(a,d);\r |
532 | }\r |
533 | \r |
534 | void PicoWriteM68k32(u32 a,u32 d)\r |
535 | {\r |
536 | #ifdef __debug_io\r |
537 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
538 | #endif\r |
539 | \r |
540 | if ((a&0xe00000)==0xe00000)\r |
541 | {\r |
542 | // Ram:\r |
543 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
544 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
545 | return;\r |
546 | }\r |
547 | \r |
548 | a&=0xfffffe;\r |
549 | \r |
550 | // prg RAM\r |
551 | if ((a&0xfe0000)==0x020000) {\r |
552 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];\r |
553 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
554 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
555 | return;\r |
556 | }\r |
557 | \r |
558 | \r |
559 | OtherWrite16(a, (u16)(d>>16));\r |
560 | OtherWrite16(a+2,(u16)d);\r |
561 | }\r |
562 | \r |
563 | \r |
564 | // -----------------------------------------------------------------\r |
565 | \r |
566 | \r |
567 | u8 PicoReadS68k8(u32 a)\r |
568 | {\r |
569 | u32 d=0;\r |
570 | \r |
571 | a&=0xffffff;\r |
572 | \r |
573 | // prg RAM\r |
574 | if (a < 0x80000) {\r |
575 | d = *(Pico_mcd->prg_ram+(a^1));\r |
576 | goto end;\r |
577 | }\r |
578 | \r |
579 | // regs\r |
580 | if ((a&0xfffe00) == 0xff8000) {\r |
581 | d = s68k_reg_read16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;\r |
582 | goto end;\r |
583 | }\r |
584 | \r |
585 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
586 | \r |
587 | end:\r |
588 | \r |
589 | #ifdef __debug_io2\r |
590 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
591 | #endif\r |
592 | return (u8)d;\r |
593 | }\r |
594 | \r |
595 | u16 PicoReadS68k16(u32 a)\r |
596 | {\r |
597 | u16 d=0;\r |
598 | \r |
599 | a&=0xfffffe;\r |
600 | \r |
601 | // prg RAM\r |
602 | if (a < 0x80000) {\r |
603 | d = *(u16 *)(Pico_mcd->prg_ram+a);\r |
604 | goto end;\r |
605 | }\r |
606 | \r |
607 | // regs\r |
608 | if ((a&0xfffe00) == 0xff8000) {\r |
609 | d = s68k_reg_read16(a, 16);\r |
610 | goto end;\r |
611 | }\r |
612 | \r |
613 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
614 | \r |
615 | end:\r |
616 | \r |
617 | #ifdef __debug_io2\r |
618 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
619 | #endif\r |
620 | return d;\r |
621 | }\r |
622 | \r |
623 | u32 PicoReadS68k32(u32 a)\r |
624 | {\r |
625 | u32 d=0;\r |
626 | \r |
627 | a&=0xfffffe;\r |
628 | \r |
629 | // prg RAM\r |
630 | if (a < 0x80000) {\r |
631 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
632 | d = (pm[0]<<16)|pm[1];\r |
633 | goto end;\r |
634 | }\r |
635 | \r |
636 | // regs\r |
637 | if ((a&0xfffe00) == 0xff8000) {\r |
638 | d = (s68k_reg_read16(a, 32)<<16)|s68k_reg_read16(a+2, 32);\r |
639 | goto end;\r |
640 | }\r |
641 | \r |
642 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
643 | \r |
644 | end:\r |
645 | \r |
646 | #ifdef __debug_io2\r |
647 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
648 | #endif\r |
649 | return d;\r |
650 | }\r |
651 | \r |
652 | // -----------------------------------------------------------------\r |
653 | \r |
654 | void PicoWriteS68k8(u32 a,u8 d)\r |
655 | {\r |
656 | #ifdef __debug_io2\r |
657 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
658 | #endif\r |
659 | \r |
660 | a&=0xffffff;\r |
661 | \r |
662 | // prg RAM\r |
663 | if (a < 0x80000) {\r |
664 | u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));\r |
665 | *pm=d;\r |
666 | return;\r |
667 | }\r |
668 | \r |
669 | // regs\r |
670 | if ((a&0xfffe00) == 0xff8000) {\r |
671 | s68k_reg_write8(a,d,8);\r |
672 | return;\r |
673 | }\r |
674 | \r |
675 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
676 | }\r |
677 | \r |
678 | void PicoWriteS68k16(u32 a,u16 d)\r |
679 | {\r |
680 | #ifdef __debug_io2\r |
681 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
682 | #endif\r |
683 | \r |
684 | a&=0xfffffe;\r |
685 | \r |
686 | // prg RAM\r |
687 | if (a < 0x80000) {\r |
688 | *(u16 *)(Pico_mcd->prg_ram+a)=d;\r |
689 | return;\r |
690 | }\r |
691 | \r |
692 | // regs\r |
693 | if ((a&0xfffe00) == 0xff8000) {\r |
694 | s68k_reg_write8(a, d>>8, 16);\r |
695 | s68k_reg_write8(a+1,d&0xff, 16);\r |
696 | return;\r |
697 | }\r |
698 | \r |
699 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
700 | }\r |
701 | \r |
702 | void PicoWriteS68k32(u32 a,u32 d)\r |
703 | {\r |
704 | #ifdef __debug_io2\r |
705 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
706 | #endif\r |
707 | \r |
708 | a&=0xfffffe;\r |
709 | \r |
710 | // prg RAM\r |
711 | if (a < 0x80000) {\r |
712 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
713 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
714 | return;\r |
715 | }\r |
716 | \r |
717 | // regs\r |
718 | if ((a&0xfffe00) == 0xff8000) {\r |
719 | s68k_reg_write8(a, d>>24, 32);\r |
720 | s68k_reg_write8(a+1,(d>>16)&0xff, 32);\r |
721 | s68k_reg_write8(a+2,(d>>8) &0xff, 32);\r |
722 | s68k_reg_write8(a+3, d &0xff, 32);\r |
723 | return;\r |
724 | }\r |
725 | \r |
726 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
727 | }\r |
728 | \r |
729 | \r |
730 | \r |
731 | // -----------------------------------------------------------------\r |
732 | \r |
733 | #ifdef EMU_M68K\r |
734 | unsigned char PicoReadCD8w (unsigned int a) {\r |
735 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);\r |
736 | }\r |
737 | unsigned short PicoReadCD16w(unsigned int a) {\r |
738 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k16(a) : PicoReadM68k16(a);\r |
739 | }\r |
740 | unsigned int PicoReadCD32w(unsigned int a) {\r |
741 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k32(a) : PicoReadM68k32(a);\r |
742 | }\r |
743 | void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
744 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k8(a, d); else PicoWriteM68k8(a, d);\r |
745 | }\r |
746 | void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
747 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k16(a, d); else PicoWriteM68k16(a, d);\r |
748 | }\r |
749 | void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
750 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k32(a, d); else PicoWriteM68k32(a, d);\r |
751 | }\r |
752 | \r |
753 | // these are allowed to access RAM\r |
754 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {\r |
755 | a&=0xffffff;\r |
756 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
757 | if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram\r |
758 | else dprintf("s68k read_pcrel8 @ %06x", a);\r |
759 | } else {\r |
760 | if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom\r |
761 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
762 | }\r |
763 | return 0;//(u8) lastread_d;\r |
764 | }\r |
765 | unsigned int m68k_read_pcrelative_CD16(unsigned int a) {\r |
766 | a&=0xffffff;\r |
767 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
768 | if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram\r |
769 | else dprintf("s68k read_pcrel16 @ %06x", a);\r |
770 | } else {\r |
771 | if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom\r |
772 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
773 | }\r |
774 | return 0;//(u16) lastread_d;\r |
775 | }\r |
776 | unsigned int m68k_read_pcrelative_CD32(unsigned int a) {\r |
777 | a&=0xffffff;\r |
778 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
779 | if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram\r |
780 | else dprintf("s68k read_pcrel32 @ %06x", a);\r |
781 | } else {\r |
782 | if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
783 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
784 | }\r |
785 | return 0; //lastread_d;\r |
786 | }\r |
787 | #endif // EMU_M68K\r |
788 | \r |