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 | \r |
10 | //#define __debug_io\r |
11 | \r |
12 | #include "PicoInt.h"\r |
13 | \r |
14 | #include "sound/sound.h"\r |
15 | #include "sound/ym2612.h"\r |
16 | #include "sound/sn76496.h"\r |
17 | \r |
18 | typedef unsigned char u8;\r |
19 | typedef unsigned short u16;\r |
20 | typedef unsigned int u32;\r |
21 | \r |
22 | extern unsigned int lastSSRamWrite; // used by serial SRAM code\r |
23 | \r |
24 | #ifdef _ASM_MEMORY_C\r |
25 | u8 PicoRead8(u32 a);\r |
26 | u16 PicoRead16(u32 a);\r |
27 | void PicoWriteRomHW_SSF2(u32 a,u32 d);\r |
28 | void PicoWriteRomHW_in1 (u32 a,u32 d);\r |
29 | #endif\r |
30 | \r |
31 | \r |
32 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
33 | // cyclone debug mode\r |
34 | u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};\r |
35 | int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;\r |
36 | extern unsigned int ppop;\r |
37 | #endif\r |
38 | \r |
39 | #if defined(EMU_C68K) || defined(EMU_A68K)\r |
40 | static __inline int PicoMemBase(u32 pc)\r |
41 | {\r |
42 | int membase=0;\r |
43 | \r |
44 | if (pc<Pico.romsize+4)\r |
45 | {\r |
46 | membase=(int)Pico.rom; // Program Counter in Rom\r |
47 | }\r |
48 | else if ((pc&0xe00000)==0xe00000)\r |
49 | {\r |
50 | membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram\r |
51 | }\r |
52 | else\r |
53 | {\r |
54 | // Error - Program Counter is invalid\r |
55 | membase=(int)Pico.rom;\r |
56 | }\r |
57 | \r |
58 | return membase;\r |
59 | }\r |
60 | #endif\r |
61 | \r |
62 | \r |
63 | #ifdef EMU_A68K\r |
64 | extern u8 *OP_ROM=NULL,*OP_RAM=NULL;\r |
65 | #endif\r |
66 | \r |
67 | static u32 CPU_CALL PicoCheckPc(u32 pc)\r |
68 | {\r |
69 | u32 ret=0;\r |
70 | #if defined(EMU_C68K)\r |
71 | pc-=PicoCpu.membase; // Get real pc\r |
72 | pc&=0xfffffe;\r |
721cd396 |
73 | if (pc == 0)\r |
74 | return (int)Pico.rom + Pico.romsize; // common crash condition, can happen if acc timing is off\r |
cc68a136 |
75 | \r |
76 | PicoCpu.membase=PicoMemBase(pc);\r |
77 | \r |
78 | ret = PicoCpu.membase+pc;\r |
79 | #elif defined(EMU_A68K)\r |
80 | OP_ROM=(u8 *)PicoMemBase(pc);\r |
81 | \r |
82 | // don't bother calling us back unless it's outside the 64k segment\r |
83 | M68000_regs.AsmBank=(pc>>16);\r |
84 | #endif\r |
85 | return ret;\r |
86 | }\r |
87 | \r |
88 | \r |
89 | int PicoInitPc(u32 pc)\r |
90 | {\r |
91 | PicoCheckPc(pc);\r |
92 | return 0;\r |
93 | }\r |
94 | \r |
95 | #ifndef _ASM_MEMORY_C\r |
96 | void PicoMemReset()\r |
97 | {\r |
98 | }\r |
99 | #endif\r |
100 | \r |
101 | // -----------------------------------------------------------------\r |
102 | \r |
103 | #ifndef _ASM_MEMORY_C\r |
104 | // address must already be checked\r |
105 | static int SRAMRead(u32 a)\r |
106 | {\r |
107 | u8 *d = SRam.data-SRam.start+a;\r |
108 | return (d[0]<<8)|d[1];\r |
109 | }\r |
110 | #endif\r |
111 | \r |
cc68a136 |
112 | \r |
113 | // for nonstandard reads\r |
114 | #ifndef _ASM_MEMORY_C\r |
115 | static\r |
116 | #endif\r |
fa1e5e29 |
117 | u32 OtherRead16End(u32 a, int realsize)\r |
cc68a136 |
118 | {\r |
119 | u32 d=0;\r |
120 | \r |
121 | dprintf("strange r%i: %06x @%06x", realsize, a&0xffffff, SekPc);\r |
122 | \r |
123 | // for games with simple protection devices, discovered by Haze\r |
124 | // some dumb detection is used, but that should be enough to make things work\r |
125 | if ((a>>22) == 1 && Pico.romsize >= 512*1024) {\r |
126 | if (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]\r |
4f672280 |
127 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
128 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
129 | }\r |
130 | else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)\r |
131 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
132 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
133 | else if (a == 0x400004) { d=0xaa<<8; goto end; }\r |
134 | else if (a == 0x400006) { d=0xf0<<8; goto end; }\r |
135 | }\r |
136 | else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]\r |
137 | if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }\r |
138 | else if (a == 0x4a8820) { d=0x0a<<8; goto end; }\r |
139 | // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case\r |
140 | }\r |
141 | else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]\r |
142 | if (a == 0x400000) { d=0x90<<8; goto end; }\r |
143 | else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then\r |
144 | // checks the result, which is of the above one. Left it just in case.\r |
145 | }\r |
146 | else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)\r |
147 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
148 | else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails\r |
149 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
150 | else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above\r |
151 | }\r |
cc68a136 |
152 | // our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])\r |
4f672280 |
153 | // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val\r |
154 | // @ 400004 which is expected @ 400006, so we really remember 2 values here\r |
cc68a136 |
155 | d = Pico.m.prot_bytes[(a>>2)&1]<<8;\r |
156 | }\r |
157 | else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {\r |
158 | if (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]\r |
4f672280 |
159 | d=0x0c; goto end;\r |
160 | }\r |
cc68a136 |
161 | else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]\r |
4f672280 |
162 | d=0x28; goto end; // does the check from RAM\r |
163 | }\r |
cc68a136 |
164 | else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]\r |
4f672280 |
165 | d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]\r |
166 | }\r |
cc68a136 |
167 | else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]\r |
4f672280 |
168 | d=0x0a; goto end;\r |
169 | }\r |
cc68a136 |
170 | }\r |
171 | else if (a == 0xa13002) { // Pocket Monsters (Unl)\r |
172 | d=0x01; goto end;\r |
173 | }\r |
174 | else if (a == 0xa1303E) { // Pocket Monsters (Unl)\r |
175 | d=0x1f; goto end;\r |
176 | }\r |
177 | else if (a == 0x30fe02) {\r |
178 | // Virtua Racing - just for fun\r |
4f672280 |
179 | // this seems to be some flag that SVP is ready or something similar\r |
cc68a136 |
180 | d=1; goto end;\r |
181 | }\r |
182 | \r |
183 | end:\r |
184 | dprintf("ret = %04x", d);\r |
185 | return d;\r |
186 | }\r |
187 | \r |
cc68a136 |
188 | \r |
189 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
190 | \r |
fa1e5e29 |
191 | static void OtherWrite8End(u32 a,u32 d,int realsize)\r |
cc68a136 |
192 | {\r |
cc68a136 |
193 | // sram\r |
194 | //if(a==0x200000) dprintf("cc : %02x @ %06x [%i|%i]", d, SekPc, SekCyclesDoneT(), SekCyclesDone());\r |
195 | //if(a==0x200001) dprintf("w8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
196 | if(a >= SRam.start && a <= SRam.end) {\r |
721cd396 |
197 | dprintf("sram w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
cc68a136 |
198 | unsigned int sreg = Pico.m.sram_reg;\r |
199 | if(!(sreg & 0x10)) {\r |
4f672280 |
200 | // not detected SRAM\r |
201 | if((a&~1)==0x200000) {\r |
cc68a136 |
202 | Pico.m.sram_reg|=4; // this should be a game with EEPROM (like NBA Jam)\r |
203 | SRam.start=0x200000; SRam.end=SRam.start+1;\r |
204 | }\r |
4f672280 |
205 | Pico.m.sram_reg|=0x10;\r |
206 | }\r |
cc68a136 |
207 | if(sreg & 4) { // EEPROM write\r |
4f672280 |
208 | if(SekCyclesDoneT()-lastSSRamWrite < 46) {\r |
209 | // just update pending state\r |
210 | SRAMUpdPending(a, d);\r |
211 | } else {\r |
212 | SRAMWriteEEPROM(sreg>>6); // execute pending\r |
213 | SRAMUpdPending(a, d);\r |
cc68a136 |
214 | lastSSRamWrite = SekCyclesDoneT();\r |
4f672280 |
215 | }\r |
cc68a136 |
216 | } else if(!(sreg & 2)) {\r |
217 | u8 *pm=(u8 *)(SRam.data-SRam.start+a);\r |
218 | if(*pm != (u8)d) {\r |
219 | SRam.changed = 1;\r |
220 | *pm=(u8)d;\r |
221 | }\r |
4f672280 |
222 | }\r |
cc68a136 |
223 | return;\r |
224 | }\r |
225 | \r |
226 | #ifdef _ASM_MEMORY_C\r |
227 | // special ROM hardware (currently only banking and sram reg supported)\r |
228 | if((a&0xfffff1) == 0xA130F1) {\r |
229 | PicoWriteRomHW_SSF2(a, d); // SSF2 or SRAM\r |
230 | return;\r |
231 | }\r |
232 | #else\r |
233 | // sram access register\r |
234 | if(a == 0xA130F1) {\r |
721cd396 |
235 | dprintf("sram reg=%02x", d);\r |
236 | Pico.m.sram_reg &= ~3;\r |
237 | Pico.m.sram_reg |= (u8)(d&3);\r |
cc68a136 |
238 | return;\r |
239 | }\r |
240 | #endif\r |
241 | dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
242 | \r |
243 | if(a >= 0xA13004 && a < 0xA13040) {\r |
244 | // dumb 12-in-1 or 4-in-1 banking support\r |
4f672280 |
245 | int len;\r |
246 | a &= 0x3f; a <<= 16;\r |
247 | len = Pico.romsize - a;\r |
248 | if (len <= 0) return; // invalid/missing bank\r |
249 | if (len > 0x200000) len = 0x200000; // 2 megs\r |
250 | memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.\r |
cc68a136 |
251 | return;\r |
252 | }\r |
253 | \r |
254 | // for games with simple protection devices, discovered by Haze\r |
255 | else if ((a>>22) == 1)\r |
256 | Pico.m.prot_bytes[(a>>2)&1] = (u8)d;\r |
257 | }\r |
258 | \r |
cc68a136 |
259 | \r |
fa1e5e29 |
260 | #include "MemoryCmn.c"\r |
261 | \r |
cc68a136 |
262 | \r |
263 | // -----------------------------------------------------------------\r |
264 | // Read Rom and read Ram\r |
265 | \r |
266 | #ifndef _ASM_MEMORY_C\r |
267 | u8 CPU_CALL PicoRead8(u32 a)\r |
268 | {\r |
269 | u32 d=0;\r |
270 | \r |
271 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
272 | \r |
273 | a&=0xffffff;\r |
274 | \r |
275 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
276 | // sram\r |
277 | if(a >= SRam.start && a <= SRam.end) {\r |
278 | unsigned int sreg = Pico.m.sram_reg;\r |
279 | if(!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM\r |
4f672280 |
280 | Pico.m.sram_reg|=0x10; // should be normal SRAM\r |
281 | }\r |
cc68a136 |
282 | if(sreg & 4) { // EEPROM read\r |
283 | d = SRAMReadEEPROM();\r |
284 | goto end;\r |
285 | } else if(sreg & 1) {\r |
286 | d = *(u8 *)(SRam.data-SRam.start+a);\r |
287 | goto end;\r |
288 | }\r |
289 | }\r |
290 | #endif\r |
291 | \r |
292 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom\r |
293 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
294 | \r |
295 | d=OtherRead16(a&~1, 8); if ((a&1)==0) d>>=8;\r |
296 | \r |
297 | end:\r |
298 | \r |
299 | //if ((a&0xe0ffff)==0xe0AE57+0x69c)\r |
300 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
301 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
302 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
303 | \r |
304 | //if(a==0x200001) dprintf("r8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
305 | //dprintf("r8 : %06x, %02x @%06x [%03i]", a&0xffffff, (u8)d, SekPc, Pico.m.scanline);\r |
306 | #ifdef __debug_io\r |
307 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
308 | #endif\r |
309 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
310 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
311 | lastread_a = a;\r |
312 | lastread_d[lrp_cyc++&15] = (u8)d;\r |
313 | }\r |
314 | #endif\r |
315 | return (u8)d;\r |
316 | }\r |
317 | \r |
318 | u16 CPU_CALL PicoRead16(u32 a)\r |
319 | {\r |
320 | u16 d=0;\r |
321 | \r |
322 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
323 | \r |
324 | a&=0xfffffe;\r |
325 | \r |
326 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
327 | // sram\r |
328 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
329 | d = (u16) SRAMRead(a);\r |
330 | goto end;\r |
331 | }\r |
332 | #endif\r |
333 | \r |
334 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom\r |
335 | \r |
336 | d = (u16)OtherRead16(a, 16);\r |
337 | \r |
338 | end:\r |
339 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
340 | // dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
341 | \r |
342 | #ifdef __debug_io\r |
343 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
344 | #endif\r |
345 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
346 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
347 | lastread_a = a;\r |
348 | lastread_d[lrp_cyc++&15] = d;\r |
349 | }\r |
350 | #endif\r |
351 | return d;\r |
352 | }\r |
353 | \r |
354 | u32 CPU_CALL PicoRead32(u32 a)\r |
355 | {\r |
356 | u32 d=0;\r |
357 | \r |
358 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
359 | \r |
360 | a&=0xfffffe;\r |
361 | \r |
362 | // sram\r |
363 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
364 | d = (SRAMRead(a)<<16)|SRAMRead(a+2);\r |
365 | goto end;\r |
366 | }\r |
367 | \r |
368 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom\r |
369 | \r |
370 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
371 | \r |
372 | end:\r |
373 | #ifdef __debug_io\r |
374 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
375 | #endif\r |
376 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
377 | if(a>=Pico.romsize&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b) {\r |
378 | lastread_a = a;\r |
379 | lastread_d[lrp_cyc++&15] = d;\r |
380 | }\r |
381 | #endif\r |
382 | return d;\r |
383 | }\r |
384 | #endif\r |
385 | \r |
386 | // -----------------------------------------------------------------\r |
387 | // Write Ram\r |
388 | \r |
389 | static void CPU_CALL PicoWrite8(u32 a,u8 d)\r |
390 | {\r |
391 | #ifdef __debug_io\r |
392 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
393 | #endif\r |
394 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
395 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
396 | #endif\r |
397 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
398 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
399 | \r |
d9153729 |
400 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram\r |
cc68a136 |
401 | \r |
402 | a&=0xffffff;\r |
403 | OtherWrite8(a,d,8);\r |
404 | }\r |
405 | \r |
b67ef287 |
406 | void CPU_CALL PicoWrite16(u32 a,u16 d)\r |
cc68a136 |
407 | {\r |
408 | #ifdef __debug_io\r |
409 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
410 | #endif\r |
411 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
412 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
413 | #endif\r |
414 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
415 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
416 | \r |
417 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram\r |
418 | \r |
419 | a&=0xfffffe;\r |
420 | OtherWrite16(a,d);\r |
421 | }\r |
422 | \r |
423 | static void CPU_CALL PicoWrite32(u32 a,u32 d)\r |
424 | {\r |
425 | #ifdef __debug_io\r |
426 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
427 | #endif\r |
428 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
429 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
430 | #endif\r |
431 | \r |
432 | if ((a&0xe00000)==0xe00000)\r |
433 | {\r |
434 | // Ram:\r |
435 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
436 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
437 | return;\r |
438 | }\r |
439 | \r |
440 | a&=0xfffffe;\r |
441 | OtherWrite16(a, (u16)(d>>16));\r |
442 | OtherWrite16(a+2,(u16)d);\r |
443 | }\r |
444 | \r |
445 | \r |
446 | // -----------------------------------------------------------------\r |
b837b69b |
447 | void PicoMemSetup()\r |
cc68a136 |
448 | {\r |
449 | #ifdef EMU_C68K\r |
450 | // Setup memory callbacks:\r |
451 | PicoCpu.checkpc=PicoCheckPc;\r |
452 | PicoCpu.fetch8 =PicoCpu.read8 =PicoRead8;\r |
453 | PicoCpu.fetch16=PicoCpu.read16=PicoRead16;\r |
454 | PicoCpu.fetch32=PicoCpu.read32=PicoRead32;\r |
455 | PicoCpu.write8 =PicoWrite8;\r |
456 | PicoCpu.write16=PicoWrite16;\r |
457 | PicoCpu.write32=PicoWrite32;\r |
458 | #endif\r |
cc68a136 |
459 | }\r |
460 | \r |
461 | #ifdef EMU_A68K\r |
462 | struct A68KInter\r |
463 | {\r |
464 | u32 unknown;\r |
465 | u8 (__fastcall *Read8) (u32 a);\r |
466 | u16 (__fastcall *Read16)(u32 a);\r |
467 | u32 (__fastcall *Read32)(u32 a);\r |
468 | void (__fastcall *Write8) (u32 a,u8 d);\r |
469 | void (__fastcall *Write16) (u32 a,u16 d);\r |
470 | void (__fastcall *Write32) (u32 a,u32 d);\r |
471 | void (__fastcall *ChangePc)(u32 a);\r |
472 | u8 (__fastcall *PcRel8) (u32 a);\r |
473 | u16 (__fastcall *PcRel16)(u32 a);\r |
474 | u32 (__fastcall *PcRel32)(u32 a);\r |
475 | u16 (__fastcall *Dir16)(u32 a);\r |
476 | u32 (__fastcall *Dir32)(u32 a);\r |
477 | };\r |
478 | \r |
479 | struct A68KInter a68k_memory_intf=\r |
480 | {\r |
481 | 0,\r |
482 | PicoRead8,\r |
483 | PicoRead16,\r |
484 | PicoRead32,\r |
485 | PicoWrite8,\r |
486 | PicoWrite16,\r |
487 | PicoWrite32,\r |
488 | PicoCheckPc,\r |
489 | PicoRead8,\r |
490 | PicoRead16,\r |
491 | PicoRead32,\r |
492 | PicoRead16, // unused\r |
493 | PicoRead32, // unused\r |
494 | };\r |
495 | #endif\r |
496 | \r |
497 | #ifdef EMU_M68K\r |
498 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a);\r |
499 | unsigned int m68k_read_pcrelative_CD16(unsigned int a);\r |
500 | unsigned int m68k_read_pcrelative_CD32(unsigned int a);\r |
501 | \r |
502 | // these are allowed to access RAM\r |
503 | unsigned int m68k_read_pcrelative_8 (unsigned int a) {\r |
504 | a&=0xffffff;\r |
505 | if(PicoMCD&1) return m68k_read_pcrelative_CD8(a);\r |
506 | if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom\r |
507 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
508 | return 0;//(u8) lastread_d;\r |
509 | }\r |
510 | unsigned int m68k_read_pcrelative_16(unsigned int a) {\r |
511 | a&=0xffffff;\r |
512 | if(PicoMCD&1) return m68k_read_pcrelative_CD16(a);\r |
513 | if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom\r |
514 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
515 | return 0;//(u16) lastread_d;\r |
516 | }\r |
517 | unsigned int m68k_read_pcrelative_32(unsigned int a) {\r |
518 | a&=0xffffff;\r |
519 | if(PicoMCD&1) return m68k_read_pcrelative_CD32(a);\r |
520 | if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
521 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
522 | return 0;//lastread_d;\r |
523 | }\r |
524 | \r |
525 | unsigned int m68k_read_immediate_16(unsigned int a) { return m68k_read_pcrelative_16(a); }\r |
526 | unsigned int m68k_read_immediate_32(unsigned int a) { return m68k_read_pcrelative_32(a); }\r |
527 | unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_pcrelative_8 (a); }\r |
528 | unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_pcrelative_16(a); }\r |
529 | unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_pcrelative_32(a); }\r |
530 | \r |
531 | #ifdef EMU_C68K\r |
532 | // ROM only\r |
533 | unsigned int m68k_read_memory_8(unsigned int a) { if(a<Pico.romsize) return *(u8 *) (Pico.rom+(a^1)); return (u8) lastread_d[lrp_mus++&15]; }\r |
534 | unsigned int m68k_read_memory_16(unsigned int a) { if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1));return (u16) lastread_d[lrp_mus++&15]; }\r |
535 | unsigned int m68k_read_memory_32(unsigned int a) { if(a<Pico.romsize) {u16 *pm=(u16 *)(Pico.rom+(a&~1));return (pm[0]<<16)|pm[1];} return lastread_d[lrp_mus++&15]; }\r |
536 | \r |
537 | // ignore writes, Cyclone already done that\r |
538 | void m68k_write_memory_8(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
539 | void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
540 | void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
541 | #else\r |
542 | unsigned char PicoReadCD8w (unsigned int a);\r |
543 | unsigned short PicoReadCD16w(unsigned int a);\r |
544 | unsigned int PicoReadCD32w(unsigned int a);\r |
545 | void PicoWriteCD8w (unsigned int a, unsigned char d);\r |
546 | void PicoWriteCD16w(unsigned int a, unsigned short d);\r |
547 | void PicoWriteCD32w(unsigned int a, unsigned int d);\r |
548 | \r |
549 | unsigned int m68k_read_memory_8(unsigned int address)\r |
550 | {\r |
4f672280 |
551 | return (PicoMCD&1) ? PicoReadCD8w(address) : PicoRead8(address);\r |
cc68a136 |
552 | }\r |
553 | \r |
554 | unsigned int m68k_read_memory_16(unsigned int address)\r |
555 | {\r |
4f672280 |
556 | return (PicoMCD&1) ? PicoReadCD16w(address) : PicoRead16(address);\r |
cc68a136 |
557 | }\r |
558 | \r |
559 | unsigned int m68k_read_memory_32(unsigned int address)\r |
560 | {\r |
4f672280 |
561 | return (PicoMCD&1) ? PicoReadCD32w(address) : PicoRead32(address);\r |
cc68a136 |
562 | }\r |
563 | \r |
564 | void m68k_write_memory_8(unsigned int address, unsigned int value)\r |
565 | {\r |
4f672280 |
566 | if (PicoMCD&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);\r |
cc68a136 |
567 | }\r |
568 | \r |
569 | void m68k_write_memory_16(unsigned int address, unsigned int value)\r |
570 | {\r |
4f672280 |
571 | if (PicoMCD&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);\r |
cc68a136 |
572 | }\r |
573 | \r |
574 | void m68k_write_memory_32(unsigned int address, unsigned int value)\r |
575 | {\r |
4f672280 |
576 | if (PicoMCD&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);\r |
cc68a136 |
577 | }\r |
578 | #endif\r |
579 | #endif // EMU_M68K\r |
580 | \r |
581 | \r |
582 | // -----------------------------------------------------------------\r |
583 | // z80 memhandlers\r |
584 | \r |
585 | unsigned char z80_read(unsigned short a)\r |
586 | {\r |
587 | u8 ret = 0;\r |
588 | \r |
589 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
590 | {\r |
591 | if(PicoOpt&1) ret = (u8) YM2612Read();\r |
592 | goto end;\r |
593 | }\r |
594 | \r |
595 | if (a>=0x8000)\r |
596 | {\r |
597 | u32 addr68k;\r |
598 | addr68k=Pico.m.z80_bank68k<<15;\r |
599 | addr68k+=a&0x7fff;\r |
600 | \r |
601 | ret = (u8) PicoRead8(addr68k);\r |
602 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, ret);\r |
603 | goto end;\r |
604 | }\r |
605 | \r |
606 | // should not be needed || dprintf("z80_read RAM");\r |
607 | if (a<0x4000) { ret = (u8) Pico.zram[a&0x1fff]; goto end; }\r |
608 | \r |
609 | end:\r |
610 | return ret;\r |
611 | }\r |
612 | \r |
613 | unsigned short z80_read16(unsigned short a)\r |
614 | {\r |
615 | //dprintf("z80_read16");\r |
616 | \r |
617 | return (u16) ( (u16)z80_read(a) | ((u16)z80_read((u16)(a+1))<<8) );\r |
618 | }\r |
619 | \r |
620 | void z80_write(unsigned char data, unsigned short a)\r |
621 | {\r |
622 | //if (a<0x4000)\r |
623 | // dprintf("z80 w8 : %06x, %02x @%04x", a, data, mz80GetRegisterValue(NULL, 0));\r |
624 | \r |
625 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
626 | {\r |
627 | if(PicoOpt&1) emustatus|=YM2612Write(a, data);\r |
628 | return;\r |
629 | }\r |
630 | \r |
631 | if ((a&0xfff9)==0x7f11) // 7f11 7f13 7f15 7f17\r |
632 | {\r |
633 | if(PicoOpt&2) SN76496Write(data);\r |
634 | return;\r |
635 | }\r |
636 | \r |
637 | if ((a>>8)==0x60)\r |
638 | {\r |
639 | Pico.m.z80_bank68k>>=1;\r |
640 | Pico.m.z80_bank68k|=(data&1)<<8;\r |
641 | Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one\r |
642 | return;\r |
643 | }\r |
644 | \r |
645 | if (a>=0x8000)\r |
646 | {\r |
647 | u32 addr68k;\r |
648 | addr68k=Pico.m.z80_bank68k<<15;\r |
649 | addr68k+=a&0x7fff;\r |
650 | PicoWrite8(addr68k, data);\r |
651 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, data);\r |
652 | return;\r |
653 | }\r |
654 | \r |
655 | // should not be needed, drZ80 knows how to access RAM itself || dprintf("z80_write RAM @ %08x", lr);\r |
656 | if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }\r |
657 | }\r |
658 | \r |
659 | void z80_write16(unsigned short data, unsigned short a)\r |
660 | {\r |
661 | //dprintf("z80_write16");\r |
662 | \r |
663 | z80_write((unsigned char) data,a);\r |
664 | z80_write((unsigned char)(data>>8),(u16)(a+1));\r |
665 | }\r |
666 | \r |