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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 |
2d0b15bb |
10 | #define __debug_io\r |
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11 | \r |
12 | #include "PicoInt.h"\r |
13 | \r |
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14 | #include "sound/ym2612.h"\r |
15 | #include "sound/sn76496.h"\r |
16 | \r |
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17 | #ifndef UTYPES_DEFINED\r |
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18 | typedef unsigned char u8;\r |
19 | typedef unsigned short u16;\r |
20 | typedef unsigned int u32;\r |
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21 | #define UTYPES_DEFINED\r |
22 | #endif\r |
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23 | \r |
24 | extern unsigned int lastSSRamWrite; // used by serial SRAM code\r |
25 | \r |
26 | #ifdef _ASM_MEMORY_C\r |
0af33fe0 |
27 | u32 PicoRead8(u32 a);\r |
28 | u32 PicoRead16(u32 a);\r |
e5503e2f |
29 | void PicoWrite8(u32 a,u8 d);\r |
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30 | void PicoWriteRomHW_SSF2(u32 a,u32 d);\r |
31 | void PicoWriteRomHW_in1 (u32 a,u32 d);\r |
32 | #endif\r |
33 | \r |
34 | \r |
35 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
36 | // cyclone debug mode\r |
37 | u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};\r |
38 | int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;\r |
39 | extern unsigned int ppop;\r |
40 | #endif\r |
41 | \r |
4f65685b |
42 | #ifdef IO_STATS\r |
43 | void log_io(unsigned int addr, int bits, int rw);\r |
44 | #else\r |
45 | #define log_io(...)\r |
46 | #endif\r |
47 | \r |
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48 | #if defined(EMU_C68K) || defined(EMU_A68K)\r |
49 | static __inline int PicoMemBase(u32 pc)\r |
50 | {\r |
51 | int membase=0;\r |
52 | \r |
53 | if (pc<Pico.romsize+4)\r |
54 | {\r |
55 | membase=(int)Pico.rom; // Program Counter in Rom\r |
56 | }\r |
57 | else if ((pc&0xe00000)==0xe00000)\r |
58 | {\r |
59 | membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram\r |
60 | }\r |
61 | else\r |
62 | {\r |
63 | // Error - Program Counter is invalid\r |
64 | membase=(int)Pico.rom;\r |
65 | }\r |
66 | \r |
67 | return membase;\r |
68 | }\r |
69 | #endif\r |
70 | \r |
71 | \r |
72 | #ifdef EMU_A68K\r |
73 | extern u8 *OP_ROM=NULL,*OP_RAM=NULL;\r |
74 | #endif\r |
75 | \r |
76 | static u32 CPU_CALL PicoCheckPc(u32 pc)\r |
77 | {\r |
78 | u32 ret=0;\r |
79 | #if defined(EMU_C68K)\r |
80 | pc-=PicoCpu.membase; // Get real pc\r |
0af33fe0 |
81 | // pc&=0xfffffe;\r |
82 | pc&=~1;\r |
83 | if ((pc<<8) == 0)\r |
721cd396 |
84 | return (int)Pico.rom + Pico.romsize; // common crash condition, can happen if acc timing is off\r |
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85 | \r |
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86 | PicoCpu.membase=PicoMemBase(pc&0x00ffffff);\r |
87 | PicoCpu.membase-=pc&0xff000000;\r |
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88 | \r |
89 | ret = PicoCpu.membase+pc;\r |
90 | #elif defined(EMU_A68K)\r |
91 | OP_ROM=(u8 *)PicoMemBase(pc);\r |
92 | \r |
93 | // don't bother calling us back unless it's outside the 64k segment\r |
94 | M68000_regs.AsmBank=(pc>>16);\r |
95 | #endif\r |
96 | return ret;\r |
97 | }\r |
98 | \r |
99 | \r |
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100 | PICO_INTERNAL int PicoInitPc(u32 pc)\r |
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101 | {\r |
102 | PicoCheckPc(pc);\r |
103 | return 0;\r |
104 | }\r |
105 | \r |
106 | #ifndef _ASM_MEMORY_C\r |
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107 | PICO_INTERNAL_ASM void PicoMemReset(void)\r |
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108 | {\r |
109 | }\r |
110 | #endif\r |
111 | \r |
112 | // -----------------------------------------------------------------\r |
113 | \r |
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114 | int PadRead(int i)\r |
115 | {\r |
116 | int pad,value,data_reg;\r |
117 | pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU\r |
118 | data_reg=Pico.ioports[i+1];\r |
119 | \r |
120 | // orr the bits, which are set as output\r |
121 | value = data_reg&(Pico.ioports[i+4]|0x80);\r |
122 | \r |
123 | if(PicoOpt & 0x20) { // 6 button gamepad enabled\r |
124 | int phase = Pico.m.padTHPhase[i];\r |
125 | \r |
126 | if(phase == 2 && !(data_reg&0x40)) { // TH\r |
127 | value|=(pad&0xc0)>>2; // ?0SA 0000\r |
128 | return value;\r |
129 | } else if(phase == 3) {\r |
130 | if(data_reg&0x40)\r |
131 | value|=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ\r |
132 | else\r |
133 | value|=((pad&0xc0)>>2)|0x0f; // ?0SA 1111\r |
134 | return value;\r |
135 | }\r |
136 | }\r |
137 | \r |
138 | if(data_reg&0x40) // TH\r |
139 | value|=(pad&0x3f); // ?1CB RLDU\r |
140 | else value|=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU\r |
141 | \r |
142 | return value; // will mirror later\r |
143 | }\r |
144 | \r |
145 | \r |
cc68a136 |
146 | #ifndef _ASM_MEMORY_C\r |
147 | // address must already be checked\r |
148 | static int SRAMRead(u32 a)\r |
149 | {\r |
150 | u8 *d = SRam.data-SRam.start+a;\r |
151 | return (d[0]<<8)|d[1];\r |
152 | }\r |
153 | #endif\r |
154 | \r |
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155 | \r |
156 | // for nonstandard reads\r |
157 | #ifndef _ASM_MEMORY_C\r |
158 | static\r |
159 | #endif\r |
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160 | u32 OtherRead16End(u32 a, int realsize)\r |
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161 | {\r |
162 | u32 d=0;\r |
163 | \r |
164 | dprintf("strange r%i: %06x @%06x", realsize, a&0xffffff, SekPc);\r |
165 | \r |
166 | // for games with simple protection devices, discovered by Haze\r |
167 | // some dumb detection is used, but that should be enough to make things work\r |
168 | if ((a>>22) == 1 && Pico.romsize >= 512*1024) {\r |
169 | if (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]\r |
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170 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
171 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
172 | }\r |
173 | else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)\r |
174 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
175 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
176 | else if (a == 0x400004) { d=0xaa<<8; goto end; }\r |
177 | else if (a == 0x400006) { d=0xf0<<8; goto end; }\r |
178 | }\r |
179 | else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]\r |
180 | if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }\r |
181 | else if (a == 0x4a8820) { d=0x0a<<8; goto end; }\r |
182 | // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case\r |
183 | }\r |
184 | else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]\r |
185 | if (a == 0x400000) { d=0x90<<8; goto end; }\r |
186 | 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 |
187 | // checks the result, which is of the above one. Left it just in case.\r |
188 | }\r |
189 | else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)\r |
190 | if (a == 0x400000) { d=0x55<<8; goto end; }\r |
191 | else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails\r |
192 | else if (a == 0x400002) { d=0x0f<<8; goto end; }\r |
193 | else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above\r |
194 | }\r |
cc68a136 |
195 | // our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])\r |
4f672280 |
196 | // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val\r |
197 | // @ 400004 which is expected @ 400006, so we really remember 2 values here\r |
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198 | d = Pico.m.prot_bytes[(a>>2)&1]<<8;\r |
199 | }\r |
200 | else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {\r |
201 | if (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]\r |
4f672280 |
202 | d=0x0c; goto end;\r |
203 | }\r |
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204 | else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]\r |
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205 | d=0x28; goto end; // does the check from RAM\r |
206 | }\r |
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207 | else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]\r |
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208 | d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]\r |
209 | }\r |
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210 | else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]\r |
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211 | d=0x0a; goto end;\r |
212 | }\r |
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213 | }\r |
214 | else if (a == 0xa13002) { // Pocket Monsters (Unl)\r |
215 | d=0x01; goto end;\r |
216 | }\r |
217 | else if (a == 0xa1303E) { // Pocket Monsters (Unl)\r |
218 | d=0x1f; goto end;\r |
219 | }\r |
220 | else if (a == 0x30fe02) {\r |
221 | // Virtua Racing - just for fun\r |
4f672280 |
222 | // this seems to be some flag that SVP is ready or something similar\r |
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223 | d=1; goto end;\r |
224 | }\r |
225 | \r |
226 | end:\r |
227 | dprintf("ret = %04x", d);\r |
228 | return d;\r |
229 | }\r |
230 | \r |
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231 | \r |
232 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
233 | \r |
fa1e5e29 |
234 | static void OtherWrite8End(u32 a,u32 d,int realsize)\r |
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235 | {\r |
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236 | // sram\r |
237 | //if(a==0x200000) dprintf("cc : %02x @ %06x [%i|%i]", d, SekPc, SekCyclesDoneT(), SekCyclesDone());\r |
238 | //if(a==0x200001) dprintf("w8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
239 | if(a >= SRam.start && a <= SRam.end) {\r |
721cd396 |
240 | dprintf("sram w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
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241 | unsigned int sreg = Pico.m.sram_reg;\r |
242 | if(!(sreg & 0x10)) {\r |
4f672280 |
243 | // not detected SRAM\r |
244 | if((a&~1)==0x200000) {\r |
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245 | Pico.m.sram_reg|=4; // this should be a game with EEPROM (like NBA Jam)\r |
246 | SRam.start=0x200000; SRam.end=SRam.start+1;\r |
247 | }\r |
4f672280 |
248 | Pico.m.sram_reg|=0x10;\r |
249 | }\r |
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250 | if(sreg & 4) { // EEPROM write\r |
4f672280 |
251 | if(SekCyclesDoneT()-lastSSRamWrite < 46) {\r |
252 | // just update pending state\r |
253 | SRAMUpdPending(a, d);\r |
254 | } else {\r |
255 | SRAMWriteEEPROM(sreg>>6); // execute pending\r |
256 | SRAMUpdPending(a, d);\r |
cc68a136 |
257 | lastSSRamWrite = SekCyclesDoneT();\r |
4f672280 |
258 | }\r |
cc68a136 |
259 | } else if(!(sreg & 2)) {\r |
260 | u8 *pm=(u8 *)(SRam.data-SRam.start+a);\r |
261 | if(*pm != (u8)d) {\r |
262 | SRam.changed = 1;\r |
263 | *pm=(u8)d;\r |
264 | }\r |
4f672280 |
265 | }\r |
cc68a136 |
266 | return;\r |
267 | }\r |
268 | \r |
269 | #ifdef _ASM_MEMORY_C\r |
270 | // special ROM hardware (currently only banking and sram reg supported)\r |
271 | if((a&0xfffff1) == 0xA130F1) {\r |
272 | PicoWriteRomHW_SSF2(a, d); // SSF2 or SRAM\r |
273 | return;\r |
274 | }\r |
275 | #else\r |
276 | // sram access register\r |
277 | if(a == 0xA130F1) {\r |
721cd396 |
278 | dprintf("sram reg=%02x", d);\r |
279 | Pico.m.sram_reg &= ~3;\r |
280 | Pico.m.sram_reg |= (u8)(d&3);\r |
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281 | return;\r |
282 | }\r |
283 | #endif\r |
284 | dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
285 | \r |
286 | if(a >= 0xA13004 && a < 0xA13040) {\r |
287 | // dumb 12-in-1 or 4-in-1 banking support\r |
4f672280 |
288 | int len;\r |
289 | a &= 0x3f; a <<= 16;\r |
290 | len = Pico.romsize - a;\r |
291 | if (len <= 0) return; // invalid/missing bank\r |
292 | if (len > 0x200000) len = 0x200000; // 2 megs\r |
293 | memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.\r |
cc68a136 |
294 | return;\r |
295 | }\r |
296 | \r |
297 | // for games with simple protection devices, discovered by Haze\r |
298 | else if ((a>>22) == 1)\r |
299 | Pico.m.prot_bytes[(a>>2)&1] = (u8)d;\r |
300 | }\r |
301 | \r |
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302 | \r |
fa1e5e29 |
303 | #include "MemoryCmn.c"\r |
304 | \r |
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305 | \r |
306 | // -----------------------------------------------------------------\r |
307 | // Read Rom and read Ram\r |
308 | \r |
309 | #ifndef _ASM_MEMORY_C\r |
eff55556 |
310 | PICO_INTERNAL_ASM u32 CPU_CALL PicoRead8(u32 a)\r |
cc68a136 |
311 | {\r |
312 | u32 d=0;\r |
313 | \r |
314 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
315 | \r |
316 | a&=0xffffff;\r |
317 | \r |
318 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
319 | // sram\r |
320 | if(a >= SRam.start && a <= SRam.end) {\r |
321 | unsigned int sreg = Pico.m.sram_reg;\r |
322 | if(!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM\r |
4f672280 |
323 | Pico.m.sram_reg|=0x10; // should be normal SRAM\r |
324 | }\r |
cc68a136 |
325 | if(sreg & 4) { // EEPROM read\r |
326 | d = SRAMReadEEPROM();\r |
327 | goto end;\r |
328 | } else if(sreg & 1) {\r |
329 | d = *(u8 *)(SRam.data-SRam.start+a);\r |
330 | goto end;\r |
331 | }\r |
332 | }\r |
333 | #endif\r |
334 | \r |
335 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom\r |
4f65685b |
336 | log_io(a, 8, 0);\r |
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337 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
338 | \r |
339 | d=OtherRead16(a&~1, 8); if ((a&1)==0) d>>=8;\r |
340 | \r |
341 | end:\r |
342 | \r |
343 | //if ((a&0xe0ffff)==0xe0AE57+0x69c)\r |
344 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
345 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
346 | // dprintf("r8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
347 | \r |
348 | //if(a==0x200001) dprintf("r8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());\r |
349 | //dprintf("r8 : %06x, %02x @%06x [%03i]", a&0xffffff, (u8)d, SekPc, Pico.m.scanline);\r |
350 | #ifdef __debug_io\r |
351 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
352 | #endif\r |
353 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
2d0b15bb |
354 | if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {\r |
cc68a136 |
355 | lastread_a = a;\r |
356 | lastread_d[lrp_cyc++&15] = (u8)d;\r |
357 | }\r |
358 | #endif\r |
0af33fe0 |
359 | return d;\r |
cc68a136 |
360 | }\r |
361 | \r |
eff55556 |
362 | PICO_INTERNAL_ASM u32 CPU_CALL PicoRead16(u32 a)\r |
cc68a136 |
363 | {\r |
0af33fe0 |
364 | u32 d=0;\r |
cc68a136 |
365 | \r |
366 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
367 | \r |
368 | a&=0xfffffe;\r |
369 | \r |
370 | #if !(defined(EMU_C68K) && defined(EMU_M68K))\r |
371 | // sram\r |
372 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
0af33fe0 |
373 | d = SRAMRead(a);\r |
cc68a136 |
374 | goto end;\r |
375 | }\r |
376 | #endif\r |
377 | \r |
378 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom\r |
4f65685b |
379 | log_io(a, 16, 0);\r |
cc68a136 |
380 | \r |
0af33fe0 |
381 | d = OtherRead16(a, 16);\r |
cc68a136 |
382 | \r |
383 | end:\r |
384 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
385 | // dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
386 | \r |
387 | #ifdef __debug_io\r |
388 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
389 | #endif\r |
390 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
2d0b15bb |
391 | if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {\r |
cc68a136 |
392 | lastread_a = a;\r |
393 | lastread_d[lrp_cyc++&15] = d;\r |
394 | }\r |
395 | #endif\r |
396 | return d;\r |
397 | }\r |
398 | \r |
eff55556 |
399 | PICO_INTERNAL_ASM u32 CPU_CALL PicoRead32(u32 a)\r |
cc68a136 |
400 | {\r |
401 | u32 d=0;\r |
402 | \r |
403 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
404 | \r |
405 | a&=0xfffffe;\r |
406 | \r |
407 | // sram\r |
408 | if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg & 1)) {\r |
409 | d = (SRAMRead(a)<<16)|SRAMRead(a+2);\r |
410 | goto end;\r |
411 | }\r |
412 | \r |
413 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom\r |
4f65685b |
414 | log_io(a, 32, 0);\r |
cc68a136 |
415 | \r |
416 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
417 | \r |
418 | end:\r |
419 | #ifdef __debug_io\r |
420 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
421 | #endif\r |
422 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
2d0b15bb |
423 | if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {\r |
cc68a136 |
424 | lastread_a = a;\r |
425 | lastread_d[lrp_cyc++&15] = d;\r |
426 | }\r |
427 | #endif\r |
428 | return d;\r |
429 | }\r |
430 | #endif\r |
431 | \r |
432 | // -----------------------------------------------------------------\r |
433 | // Write Ram\r |
434 | \r |
e5503e2f |
435 | #ifndef _ASM_MEMORY_C\r |
436 | PICO_INTERNAL_ASM void CPU_CALL PicoWrite8(u32 a,u8 d)\r |
cc68a136 |
437 | {\r |
438 | #ifdef __debug_io\r |
439 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
440 | #endif\r |
441 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
442 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
443 | #endif\r |
444 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
445 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
446 | \r |
d9153729 |
447 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram\r |
4f65685b |
448 | log_io(a, 8, 1);\r |
cc68a136 |
449 | \r |
450 | a&=0xffffff;\r |
fb9bec94 |
451 | OtherWrite8(a,d);\r |
cc68a136 |
452 | }\r |
e5503e2f |
453 | #endif\r |
cc68a136 |
454 | \r |
b67ef287 |
455 | void CPU_CALL PicoWrite16(u32 a,u16 d)\r |
cc68a136 |
456 | {\r |
457 | #ifdef __debug_io\r |
458 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
459 | #endif\r |
460 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
461 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
462 | #endif\r |
463 | //if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)\r |
464 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
465 | \r |
466 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram\r |
4f65685b |
467 | log_io(a, 16, 1);\r |
cc68a136 |
468 | \r |
469 | a&=0xfffffe;\r |
470 | OtherWrite16(a,d);\r |
471 | }\r |
472 | \r |
473 | static void CPU_CALL PicoWrite32(u32 a,u32 d)\r |
474 | {\r |
475 | #ifdef __debug_io\r |
476 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
477 | #endif\r |
478 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
479 | lastwrite_cyc_d[lwp_cyc++&15] = d;\r |
480 | #endif\r |
481 | \r |
482 | if ((a&0xe00000)==0xe00000)\r |
483 | {\r |
484 | // Ram:\r |
485 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
486 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
487 | return;\r |
488 | }\r |
4f65685b |
489 | log_io(a, 32, 1);\r |
cc68a136 |
490 | \r |
491 | a&=0xfffffe;\r |
492 | OtherWrite16(a, (u16)(d>>16));\r |
493 | OtherWrite16(a+2,(u16)d);\r |
494 | }\r |
495 | \r |
496 | \r |
497 | // -----------------------------------------------------------------\r |
eff55556 |
498 | PICO_INTERNAL void PicoMemSetup(void)\r |
cc68a136 |
499 | {\r |
500 | #ifdef EMU_C68K\r |
501 | // Setup memory callbacks:\r |
502 | PicoCpu.checkpc=PicoCheckPc;\r |
503 | PicoCpu.fetch8 =PicoCpu.read8 =PicoRead8;\r |
504 | PicoCpu.fetch16=PicoCpu.read16=PicoRead16;\r |
505 | PicoCpu.fetch32=PicoCpu.read32=PicoRead32;\r |
506 | PicoCpu.write8 =PicoWrite8;\r |
507 | PicoCpu.write16=PicoWrite16;\r |
508 | PicoCpu.write32=PicoWrite32;\r |
509 | #endif\r |
cc68a136 |
510 | }\r |
511 | \r |
512 | #ifdef EMU_A68K\r |
513 | struct A68KInter\r |
514 | {\r |
515 | u32 unknown;\r |
516 | u8 (__fastcall *Read8) (u32 a);\r |
517 | u16 (__fastcall *Read16)(u32 a);\r |
518 | u32 (__fastcall *Read32)(u32 a);\r |
519 | void (__fastcall *Write8) (u32 a,u8 d);\r |
520 | void (__fastcall *Write16) (u32 a,u16 d);\r |
521 | void (__fastcall *Write32) (u32 a,u32 d);\r |
522 | void (__fastcall *ChangePc)(u32 a);\r |
523 | u8 (__fastcall *PcRel8) (u32 a);\r |
524 | u16 (__fastcall *PcRel16)(u32 a);\r |
525 | u32 (__fastcall *PcRel32)(u32 a);\r |
526 | u16 (__fastcall *Dir16)(u32 a);\r |
527 | u32 (__fastcall *Dir32)(u32 a);\r |
528 | };\r |
529 | \r |
530 | struct A68KInter a68k_memory_intf=\r |
531 | {\r |
532 | 0,\r |
533 | PicoRead8,\r |
534 | PicoRead16,\r |
535 | PicoRead32,\r |
536 | PicoWrite8,\r |
537 | PicoWrite16,\r |
538 | PicoWrite32,\r |
539 | PicoCheckPc,\r |
540 | PicoRead8,\r |
541 | PicoRead16,\r |
542 | PicoRead32,\r |
543 | PicoRead16, // unused\r |
544 | PicoRead32, // unused\r |
545 | };\r |
546 | #endif\r |
547 | \r |
548 | #ifdef EMU_M68K\r |
549 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a);\r |
550 | unsigned int m68k_read_pcrelative_CD16(unsigned int a);\r |
551 | unsigned int m68k_read_pcrelative_CD32(unsigned int a);\r |
552 | \r |
553 | // these are allowed to access RAM\r |
2d0b15bb |
554 | static unsigned int m68k_read_8 (unsigned int a, int do_fake) {\r |
cc68a136 |
555 | a&=0xffffff;\r |
556 | if(PicoMCD&1) return m68k_read_pcrelative_CD8(a);\r |
557 | if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom\r |
2270612a |
558 | #ifdef EMU_C68K\r |
2d0b15bb |
559 | if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];\r |
2270612a |
560 | #endif\r |
cc68a136 |
561 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
2d0b15bb |
562 | return 0;\r |
cc68a136 |
563 | }\r |
2d0b15bb |
564 | static unsigned int m68k_read_16(unsigned int a, int do_fake) {\r |
cc68a136 |
565 | a&=0xffffff;\r |
566 | if(PicoMCD&1) return m68k_read_pcrelative_CD16(a);\r |
567 | if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom\r |
2270612a |
568 | #ifdef EMU_C68K\r |
2d0b15bb |
569 | if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];\r |
2270612a |
570 | #endif\r |
cc68a136 |
571 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
2d0b15bb |
572 | return 0;\r |
cc68a136 |
573 | }\r |
2d0b15bb |
574 | static unsigned int m68k_read_32(unsigned int a, int do_fake) {\r |
cc68a136 |
575 | a&=0xffffff;\r |
576 | if(PicoMCD&1) return m68k_read_pcrelative_CD32(a);\r |
577 | if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
2270612a |
578 | #ifdef EMU_C68K\r |
2d0b15bb |
579 | if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];\r |
2270612a |
580 | #endif\r |
cc68a136 |
581 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
2d0b15bb |
582 | return 0;\r |
cc68a136 |
583 | }\r |
584 | \r |
2d0b15bb |
585 | unsigned int m68k_read_pcrelative_8 (unsigned int a) { return m68k_read_8 (a, 1); }\r |
586 | unsigned int m68k_read_pcrelative_16(unsigned int a) { return m68k_read_16(a, 1); }\r |
587 | unsigned int m68k_read_pcrelative_32(unsigned int a) { return m68k_read_32(a, 1); }\r |
588 | unsigned int m68k_read_immediate_16(unsigned int a) { return m68k_read_16(a, 0); }\r |
589 | unsigned int m68k_read_immediate_32(unsigned int a) { return m68k_read_32(a, 0); }\r |
590 | unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_8 (a, 0); }\r |
591 | unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_16(a, 0); }\r |
592 | unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_32(a, 0); }\r |
cc68a136 |
593 | \r |
594 | #ifdef EMU_C68K\r |
595 | // ROM only\r |
2d0b15bb |
596 | unsigned int m68k_read_memory_8(unsigned int a)\r |
597 | {\r |
598 | u8 d;\r |
599 | if(a<Pico.romsize) d = *(u8 *) (Pico.rom+(a^1));\r |
600 | else d = (u8) lastread_d[lrp_mus++&15];\r |
601 | #ifdef __debug_io\r |
602 | dprintf("r8_mu : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
603 | #endif\r |
604 | return d;\r |
605 | }\r |
606 | unsigned int m68k_read_memory_16(unsigned int a)\r |
607 | {\r |
608 | u16 d;\r |
609 | if(a<Pico.romsize) d = *(u16 *)(Pico.rom+(a&~1));\r |
610 | else d = (u16) lastread_d[lrp_mus++&15];\r |
611 | #ifdef __debug_io\r |
612 | dprintf("r16_mu: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
613 | #endif\r |
614 | return d;\r |
615 | }\r |
616 | unsigned int m68k_read_memory_32(unsigned int a)\r |
617 | {\r |
618 | u32 d;\r |
619 | if(a<Pico.romsize) {u16 *pm=(u16 *)(Pico.rom+(a&~1));d=(pm[0]<<16)|pm[1];}\r |
620 | else d = lastread_d[lrp_mus++&15];\r |
621 | #ifdef __debug_io\r |
622 | dprintf("r32_mu: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
623 | #endif\r |
624 | return d;\r |
625 | }\r |
cc68a136 |
626 | \r |
627 | // ignore writes, Cyclone already done that\r |
628 | void m68k_write_memory_8(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
629 | void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
630 | void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }\r |
631 | #else\r |
632 | unsigned char PicoReadCD8w (unsigned int a);\r |
633 | unsigned short PicoReadCD16w(unsigned int a);\r |
634 | unsigned int PicoReadCD32w(unsigned int a);\r |
635 | void PicoWriteCD8w (unsigned int a, unsigned char d);\r |
636 | void PicoWriteCD16w(unsigned int a, unsigned short d);\r |
637 | void PicoWriteCD32w(unsigned int a, unsigned int d);\r |
638 | \r |
639 | unsigned int m68k_read_memory_8(unsigned int address)\r |
640 | {\r |
4f672280 |
641 | return (PicoMCD&1) ? PicoReadCD8w(address) : PicoRead8(address);\r |
cc68a136 |
642 | }\r |
643 | \r |
644 | unsigned int m68k_read_memory_16(unsigned int address)\r |
645 | {\r |
4f672280 |
646 | return (PicoMCD&1) ? PicoReadCD16w(address) : PicoRead16(address);\r |
cc68a136 |
647 | }\r |
648 | \r |
649 | unsigned int m68k_read_memory_32(unsigned int address)\r |
650 | {\r |
4f672280 |
651 | return (PicoMCD&1) ? PicoReadCD32w(address) : PicoRead32(address);\r |
cc68a136 |
652 | }\r |
653 | \r |
654 | void m68k_write_memory_8(unsigned int address, unsigned int value)\r |
655 | {\r |
4f672280 |
656 | if (PicoMCD&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);\r |
cc68a136 |
657 | }\r |
658 | \r |
659 | void m68k_write_memory_16(unsigned int address, unsigned int value)\r |
660 | {\r |
4f672280 |
661 | if (PicoMCD&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);\r |
cc68a136 |
662 | }\r |
663 | \r |
664 | void m68k_write_memory_32(unsigned int address, unsigned int value)\r |
665 | {\r |
4f672280 |
666 | if (PicoMCD&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);\r |
cc68a136 |
667 | }\r |
668 | #endif\r |
669 | #endif // EMU_M68K\r |
670 | \r |
671 | \r |
672 | // -----------------------------------------------------------------\r |
673 | // z80 memhandlers\r |
674 | \r |
eff55556 |
675 | PICO_INTERNAL unsigned char z80_read(unsigned short a)\r |
cc68a136 |
676 | {\r |
677 | u8 ret = 0;\r |
678 | \r |
679 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
680 | {\r |
681 | if(PicoOpt&1) ret = (u8) YM2612Read();\r |
682 | goto end;\r |
683 | }\r |
684 | \r |
685 | if (a>=0x8000)\r |
686 | {\r |
687 | u32 addr68k;\r |
688 | addr68k=Pico.m.z80_bank68k<<15;\r |
689 | addr68k+=a&0x7fff;\r |
690 | \r |
691 | ret = (u8) PicoRead8(addr68k);\r |
692 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, ret);\r |
693 | goto end;\r |
694 | }\r |
695 | \r |
696 | // should not be needed || dprintf("z80_read RAM");\r |
697 | if (a<0x4000) { ret = (u8) Pico.zram[a&0x1fff]; goto end; }\r |
698 | \r |
699 | end:\r |
700 | return ret;\r |
701 | }\r |
702 | \r |
eff55556 |
703 | PICO_INTERNAL unsigned short z80_read16(unsigned short a)\r |
cc68a136 |
704 | {\r |
705 | //dprintf("z80_read16");\r |
706 | \r |
707 | return (u16) ( (u16)z80_read(a) | ((u16)z80_read((u16)(a+1))<<8) );\r |
708 | }\r |
709 | \r |
eff55556 |
710 | PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a)\r |
cc68a136 |
711 | {\r |
712 | //if (a<0x4000)\r |
713 | // dprintf("z80 w8 : %06x, %02x @%04x", a, data, mz80GetRegisterValue(NULL, 0));\r |
714 | \r |
715 | if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)\r |
716 | {\r |
717 | if(PicoOpt&1) emustatus|=YM2612Write(a, data);\r |
718 | return;\r |
719 | }\r |
720 | \r |
721 | if ((a&0xfff9)==0x7f11) // 7f11 7f13 7f15 7f17\r |
722 | {\r |
723 | if(PicoOpt&2) SN76496Write(data);\r |
724 | return;\r |
725 | }\r |
726 | \r |
727 | if ((a>>8)==0x60)\r |
728 | {\r |
729 | Pico.m.z80_bank68k>>=1;\r |
730 | Pico.m.z80_bank68k|=(data&1)<<8;\r |
731 | Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one\r |
732 | return;\r |
733 | }\r |
734 | \r |
735 | if (a>=0x8000)\r |
736 | {\r |
737 | u32 addr68k;\r |
738 | addr68k=Pico.m.z80_bank68k<<15;\r |
739 | addr68k+=a&0x7fff;\r |
740 | PicoWrite8(addr68k, data);\r |
741 | //dprintf("z80->68k w8 : %06x, %02x", addr68k, data);\r |
742 | return;\r |
743 | }\r |
744 | \r |
745 | // should not be needed, drZ80 knows how to access RAM itself || dprintf("z80_write RAM @ %08x", lr);\r |
746 | if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }\r |
747 | }\r |
748 | \r |
eff55556 |
749 | PICO_INTERNAL void z80_write16(unsigned short data, unsigned short a)\r |
cc68a136 |
750 | {\r |
751 | //dprintf("z80_write16");\r |
752 | \r |
753 | z80_write((unsigned char) data,a);\r |
754 | z80_write((unsigned char)(data>>8),(u16)(a+1));\r |
755 | }\r |
756 | \r |