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 |
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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 |
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37 | // dprintf("m68k_regs r%2i: [%02x] @%06x", realsize&~1, a+(realsize&1), SekPc);\r |
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38 | \r |
39 | switch (a) {\r |
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40 | case 0:\r |
41 | d = ((Pico_mcd->s68k_regs[0x33]<<13)&0x8000) | Pico_mcd->m68k_regs[1]; // here IFL2 is always 0, just like in Gens\r |
42 | goto end;\r |
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43 | case 2:\r |
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44 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
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45 | dprintf("m68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
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46 | goto end;\r |
47 | case 8:\r |
48 | dprintf("m68k host data read");\r |
49 | d = Read_CDC_Host(0);\r |
50 | goto end;\r |
51 | case 0xC:\r |
52 | dprintf("m68k stopwatch read");\r |
53 | break;\r |
54 | }\r |
55 | \r |
56 | if (a < 0xE) {\r |
57 | d = (Pico_mcd->m68k_regs[a]<<8) | Pico_mcd->m68k_regs[a+1];\r |
58 | goto end;\r |
59 | }\r |
60 | \r |
61 | if (a < 0x30) {\r |
62 | // comm flag/cmd/status (0xE-0x2F)\r |
63 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
64 | goto end;\r |
65 | }\r |
66 | \r |
67 | dprintf("m68k_regs invalid read @ %02x", a);\r |
68 | \r |
69 | end:\r |
70 | \r |
672ad671 |
71 | // dprintf("ret = %04x", d);\r |
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72 | return d;\r |
73 | }\r |
74 | \r |
75 | static void m68k_reg_write8(u32 a, u32 d, int realsize)\r |
76 | {\r |
77 | a &= 0x3f;\r |
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78 | // dprintf("m68k_regs w%2i: [%02x] %02x @%06x", realsize, a, d, SekPc);\r |
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79 | \r |
80 | switch (a) {\r |
81 | case 0:\r |
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82 | d &= 1;\r |
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83 | if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { dprintf("m68k: s68k irq 2"); SekInterruptS68k(2); }\r |
84 | break;\r |
85 | case 1:\r |
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86 | d &= 3;\r |
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87 | if (!(d&1)) PicoMCD |= 2; // reset pending, needed to be sure we fetch the right vectors on reset\r |
88 | if ( (Pico_mcd->m68k_regs[1]&1) != (d&1)) dprintf("m68k: s68k reset %i", !(d&1));\r |
89 | if ( (Pico_mcd->m68k_regs[1]&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);\r |
90 | if (/*!(Pico_mcd->m68k_regs[1]&1) &&*/ (PicoMCD&2) && (d&3)==1) {\r |
91 | SekResetS68k(); // S68k comes out of RESET or BRQ state\r |
92 | PicoMCD&=~2;\r |
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93 | dprintf("m68k: resetting s68k, cycles=%i", SekCyclesLeft);\r |
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94 | }\r |
95 | break;\r |
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96 | case 2:\r |
97 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
98 | return;\r |
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99 | case 3:\r |
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100 | dprintf("m68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
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101 | d &= 0xc2;\r |
102 | if ((Pico_mcd->s68k_regs[3]>>6) != ((d>>6)&3))\r |
103 | dprintf("m68k: prg bank: %i -> %i", (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
104 | //if ((Pico_mcd->s68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);\r |
105 | //if ((Pico_mcd->s68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :\r |
106 | // ((d&2) ? "word ram to s68k" : "word ram to m68k"));\r |
107 | d |= Pico_mcd->s68k_regs[3]&0x1d;\r |
d0d47c5b |
108 | if (!(d & 4) && (d & 2)) d &= ~1; // return word RAM to s68k in 2M mode\r |
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109 | Pico_mcd->s68k_regs[3] = d; // really use s68k side register\r |
110 | return;\r |
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111 | case 0xe:\r |
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112 | //dprintf("m68k: comm flag: %02x", d);\r |
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113 | \r |
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114 | //dprintf("s68k @ %06x", SekPcS68k);\r |
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115 | \r |
116 | Pico_mcd->s68k_regs[0xe] = d;\r |
117 | break;\r |
118 | }\r |
119 | \r |
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120 | if (a < 0x10) {\r |
121 | Pico_mcd->m68k_regs[a] = (u8) d;\r |
122 | return;\r |
123 | }\r |
124 | \r |
125 | if ((a&0xf0) == 0x10) {\r |
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126 | Pico_mcd->s68k_regs[a] = d;\r |
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127 | return;\r |
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128 | }\r |
129 | \r |
130 | if (a >= 0x20 || (a >= 0xa && a <= 0xd) || a == 0x0f)\r |
131 | dprintf("m68k: invalid write?");\r |
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132 | }\r |
133 | \r |
134 | \r |
135 | \r |
136 | static u32 s68k_reg_read16(u32 a, int realsize)\r |
137 | {\r |
138 | u32 d=0;\r |
139 | a &= 0x1fe;\r |
140 | \r |
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141 | // dprintf("s68k_regs r%2i: [%02x] @ %06x", realsize&~1, a+(realsize&1), SekPcS68k);\r |
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142 | \r |
143 | switch (a) {\r |
144 | case 0:\r |
145 | d = 1; goto end; // ver = 0, not in reset state\r |
672ad671 |
146 | case 2:\r |
147 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0x1f);\r |
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148 | dprintf("s68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
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149 | goto end;\r |
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150 | case 6:\r |
151 | d = CDC_Read_Reg();\r |
152 | goto end;\r |
153 | case 8:\r |
154 | dprintf("s68k host data read");\r |
155 | d = Read_CDC_Host(1);\r |
156 | goto end;\r |
157 | case 0xC:\r |
158 | dprintf("s68k stopwatch read");\r |
159 | break;\r |
160 | case 0x34: // fader\r |
161 | d = 0; // no busy bit\r |
162 | goto end;\r |
163 | }\r |
164 | \r |
165 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
166 | \r |
167 | end:\r |
168 | \r |
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169 | // dprintf("ret = %04x", d);\r |
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170 | \r |
171 | return d;\r |
172 | }\r |
173 | \r |
174 | static void s68k_reg_write8(u32 a, u32 d, int realsize)\r |
175 | {\r |
176 | a &= 0x1ff;\r |
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177 | //dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);\r |
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178 | \r |
179 | // TODO: review against Gens\r |
180 | switch (a) {\r |
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181 | case 2:\r |
182 | return; // only m68k can change WP\r |
183 | case 3:\r |
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184 | dprintf("s68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
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185 | d &= 0x1d;\r |
d0d47c5b |
186 | if (d&4) {\r |
187 | d |= Pico_mcd->s68k_regs[3]&0xc2;\r |
188 | if ((d ^ Pico_mcd->s68k_regs[3]) & 5) d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit\r |
189 | } else {\r |
190 | d |= Pico_mcd->s68k_regs[3]&0xc3;\r |
191 | if (d&1) d &= ~2; // return word RAM to m68k in 2M mode\r |
192 | }\r |
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193 | break;\r |
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194 | case 4:\r |
195 | dprintf("s68k CDC dest: %x", d&7);\r |
196 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
197 | return;\r |
198 | case 5:\r |
199 | dprintf("s68k CDC reg addr: %x", d&0xf);\r |
200 | break;\r |
201 | case 7:\r |
202 | CDC_Write_Reg(d);\r |
203 | return;\r |
204 | case 0xa:\r |
205 | dprintf("s68k set CDC dma addr");\r |
206 | break;\r |
207 | case 0x33: // IRQ mask\r |
208 | dprintf("s68k irq mask: %02x", d);\r |
209 | if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {\r |
210 | CDD_Export_Status();\r |
211 | // counter75hz = 0; // ???\r |
212 | }\r |
213 | break;\r |
214 | case 0x34: // fader\r |
215 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
216 | return;\r |
672ad671 |
217 | case 0x36:\r |
218 | return; // d/m bit is unsetable\r |
219 | case 0x37: {\r |
220 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
221 | Pico_mcd->s68k_regs[0x37] = d&7;\r |
222 | if ((d&4) && !(d_old&4)) {\r |
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223 | CDD_Export_Status();\r |
224 | // counter75hz = 0; // ???\r |
225 | }\r |
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226 | return;\r |
227 | }\r |
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228 | case 0x4b:\r |
229 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
230 | CDD_Import_Command();\r |
231 | return;\r |
232 | }\r |
233 | \r |
234 | if ((a&0x1f0) == 0x10 || a == 0x0e || (a >= 0x38 && a < 0x42))\r |
235 | {\r |
236 | dprintf("m68k: invalid write @ %02x?", a);\r |
237 | return;\r |
238 | }\r |
239 | \r |
240 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
241 | }\r |
242 | \r |
243 | \r |
244 | \r |
245 | \r |
246 | \r |
247 | static int PadRead(int i)\r |
248 | {\r |
249 | int pad=0,value=0,TH;\r |
250 | pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU\r |
251 | TH=Pico.ioports[i+1]&0x40;\r |
252 | \r |
253 | if(PicoOpt & 0x20) { // 6 button gamepad enabled\r |
254 | int phase = Pico.m.padTHPhase[i];\r |
255 | \r |
256 | if(phase == 2 && !TH) {\r |
257 | value=(pad&0xc0)>>2; // ?0SA 0000\r |
258 | goto end;\r |
259 | } else if(phase == 3 && TH) {\r |
260 | value=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ\r |
261 | goto end;\r |
262 | } else if(phase == 3 && !TH) {\r |
263 | value=((pad&0xc0)>>2)|0x0f; // ?0SA 1111\r |
264 | goto end;\r |
265 | }\r |
266 | }\r |
267 | \r |
268 | if(TH) value=(pad&0x3f); // ?1CB RLDU\r |
269 | else value=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU\r |
270 | \r |
271 | end:\r |
272 | \r |
273 | // orr the bits, which are set as output\r |
274 | value |= Pico.ioports[i+1]&Pico.ioports[i+4];\r |
275 | \r |
276 | return value; // will mirror later\r |
277 | }\r |
278 | \r |
279 | static u8 z80Read8(u32 a)\r |
280 | {\r |
281 | if(Pico.m.z80Run&1) return 0;\r |
282 | \r |
283 | a&=0x1fff;\r |
284 | \r |
285 | if(!(PicoOpt&4)) {\r |
286 | // Z80 disabled, do some faking\r |
287 | static u8 zerosent = 0;\r |
288 | if(a == Pico.m.z80_lastaddr) { // probably polling something\r |
289 | u8 d = Pico.m.z80_fakeval;\r |
290 | if((d & 0xf) == 0xf && !zerosent) {\r |
291 | d = 0; zerosent = 1;\r |
292 | } else {\r |
293 | Pico.m.z80_fakeval++;\r |
294 | zerosent = 0;\r |
295 | }\r |
296 | return d;\r |
297 | } else {\r |
298 | Pico.m.z80_fakeval = 0;\r |
299 | }\r |
300 | }\r |
301 | \r |
302 | Pico.m.z80_lastaddr = (u16) a;\r |
303 | return Pico.zram[a];\r |
304 | }\r |
305 | \r |
306 | \r |
307 | // for nonstandard reads\r |
308 | static u32 UnusualRead16(u32 a, int realsize)\r |
309 | {\r |
310 | u32 d=0;\r |
311 | \r |
312 | dprintf("unusual r%i: %06x @%06x", realsize&~1, (a&0xfffffe)+(realsize&1), SekPc);\r |
313 | \r |
314 | \r |
315 | dprintf("ret = %04x", d);\r |
316 | return d;\r |
317 | }\r |
318 | \r |
319 | static u32 OtherRead16(u32 a, int realsize)\r |
320 | {\r |
321 | u32 d=0;\r |
322 | \r |
323 | if ((a&0xff0000)==0xa00000) {\r |
324 | if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)\r |
325 | if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; goto end; } // 0x4000-0x5fff, Fudge if disabled\r |
326 | d=0xffff; goto end;\r |
327 | }\r |
328 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
329 | a=(a>>1)&0xf;\r |
330 | switch(a) {\r |
331 | case 0: d=Pico.m.hardware; break; // Hardware value (Version register)\r |
332 | case 1: d=PadRead(0); d|=Pico.ioports[1]&0x80; break;\r |
333 | case 2: d=PadRead(1); d|=Pico.ioports[2]&0x80; break;\r |
334 | default: d=Pico.ioports[a]; break; // IO ports can be used as RAM\r |
335 | }\r |
336 | d|=d<<8;\r |
337 | goto end;\r |
338 | }\r |
339 | // |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers\r |
340 | if (a==0xa11100) { d=((Pico.m.z80Run&1)<<8)|0x8000|Pico.m.rotate++; goto end; }\r |
341 | \r |
342 | if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }\r |
343 | \r |
672ad671 |
344 | if ((a&0xffffc0)==0xa12000) {\r |
345 | d=m68k_reg_read16(a, realsize);\r |
346 | goto end;\r |
347 | }\r |
cc68a136 |
348 | \r |
349 | d = UnusualRead16(a, realsize);\r |
350 | \r |
351 | end:\r |
352 | return d;\r |
353 | }\r |
354 | \r |
355 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
356 | \r |
357 | static void OtherWrite8(u32 a,u32 d,int realsize)\r |
358 | {\r |
359 | if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound\r |
360 | if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram\r |
361 | if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound\r |
362 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
363 | a=(a>>1)&0xf;\r |
364 | // 6 button gamepad: if TH went from 0 to 1, gamepad changes state\r |
365 | if(PicoOpt&0x20) {\r |
366 | if(a==1) {\r |
367 | Pico.m.padDelay[0] = 0;\r |
368 | if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;\r |
369 | }\r |
370 | else if(a==2) {\r |
371 | Pico.m.padDelay[1] = 0;\r |
372 | if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;\r |
373 | }\r |
374 | }\r |
375 | Pico.ioports[a]=(u8)d; // IO ports can be used as RAM\r |
376 | return;\r |
377 | }\r |
378 | if (a==0xa11100) {\r |
379 | extern int z80startCycle, z80stopCycle;\r |
380 | //int lineCycles=(488-SekCyclesLeft)&0x1ff;\r |
381 | d&=1; d^=1;\r |
382 | if(!d) {\r |
383 | // hack: detect a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)\r |
384 | if((PicoOpt&4) && Pico.m.z80Run==1) z80_run(20);\r |
385 | z80stopCycle = SekCyclesDone();\r |
386 | //z80ExtraCycles += (lineCycles>>1)-(lineCycles>>5); // only meaningful in PicoFrameHints()\r |
387 | } else {\r |
388 | z80startCycle = SekCyclesDone();\r |
389 | //if(Pico.m.scanline != -1)\r |
390 | //z80ExtraCycles -= (lineCycles>>1)-(lineCycles>>5)+16;\r |
391 | }\r |
392 | //dprintf("set_zrun: %i [%i|%i] zPC=%04x @%06x", d, Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0), SekPc);\r |
393 | Pico.m.z80Run=(u8)d; return;\r |
394 | }\r |
395 | if (a==0xa11200) { if(!(d&1)) z80_reset(); return; }\r |
396 | \r |
397 | if ((a&0xff7f00)==0xa06000) // Z80 BANK register\r |
398 | {\r |
399 | Pico.m.z80_bank68k>>=1;\r |
400 | Pico.m.z80_bank68k|=(d&1)<<8;\r |
401 | Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one\r |
402 | return;\r |
403 | }\r |
404 | \r |
405 | if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)(d|(d<<8))); return; } // Byte access gets mirrored\r |
406 | \r |
407 | if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d, realsize); return; }\r |
408 | \r |
409 | dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
410 | }\r |
411 | \r |
412 | static void OtherWrite16(u32 a,u32 d)\r |
413 | {\r |
414 | if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; }\r |
415 | if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only)\r |
416 | \r |
417 | if ((a&0xffffe0)==0xa10000) { // I/O ports\r |
418 | a=(a>>1)&0xf;\r |
419 | // 6 button gamepad: if TH went from 0 to 1, gamepad changes state\r |
420 | if(PicoOpt&0x20) {\r |
421 | if(a==1) {\r |
422 | Pico.m.padDelay[0] = 0;\r |
423 | if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;\r |
424 | }\r |
425 | else if(a==2) {\r |
426 | Pico.m.padDelay[1] = 0;\r |
427 | if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;\r |
428 | }\r |
429 | }\r |
430 | Pico.ioports[a]=(u8)d; // IO ports can be used as RAM\r |
431 | return;\r |
432 | }\r |
433 | if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; }\r |
434 | if (a==0xa11200) { if(!(d&0x100)) z80_reset(); return; }\r |
435 | \r |
436 | OtherWrite8(a, d>>8, 16);\r |
437 | OtherWrite8(a+1,d&0xff, 16);\r |
438 | }\r |
439 | \r |
440 | // -----------------------------------------------------------------\r |
441 | // Read Rom and read Ram\r |
442 | \r |
443 | u8 PicoReadM68k8(u32 a)\r |
444 | {\r |
445 | u32 d=0;\r |
446 | \r |
447 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
448 | \r |
449 | a&=0xffffff;\r |
450 | \r |
451 | if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios\r |
452 | \r |
453 | // prg RAM\r |
454 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
455 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
456 | d = *(prg_bank+((a^1)&0x1ffff));\r |
457 | goto end;\r |
458 | }\r |
459 | \r |
d0d47c5b |
460 | // word RAM\r |
461 | if ((a&0xfc0000)==0x200000) {\r |
462 | dprintf("m68k_wram r8: [%06x] @%06x", a, SekPc);\r |
463 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
464 | if (a >= 0x220000) {\r |
465 | dprintf("cell");\r |
466 | } else {\r |
467 | a=((a&0x1fffe)<<1)|(a&1);\r |
468 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
469 | d = Pico_mcd->word_ram[a^1];\r |
470 | }\r |
d0d47c5b |
471 | } else {\r |
472 | // allow access in any mode, like Gens does\r |
473 | d = Pico_mcd->word_ram[(a^1)&0x3ffff];\r |
474 | }\r |
475 | dprintf("ret = %02x", (u8)d);\r |
476 | goto end;\r |
477 | }\r |
478 | \r |
cc68a136 |
479 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
480 | \r |
bf098bc5 |
481 | //if ((a&0xffffc0)==0xa12000)\r |
482 | // dprintf("m68k_regs r8: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
483 | \r |
cc68a136 |
484 | d=OtherRead16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;\r |
485 | \r |
bf098bc5 |
486 | //if ((a&0xffffc0)==0xa12000)\r |
487 | // dprintf("ret = %02x", (u8)d);\r |
672ad671 |
488 | \r |
cc68a136 |
489 | end:\r |
490 | \r |
491 | #ifdef __debug_io\r |
492 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
493 | #endif\r |
494 | return (u8)d;\r |
495 | }\r |
496 | \r |
497 | u16 PicoReadM68k16(u32 a)\r |
498 | {\r |
499 | u16 d=0;\r |
500 | \r |
501 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
502 | \r |
503 | a&=0xfffffe;\r |
504 | \r |
505 | if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios\r |
506 | \r |
507 | // prg RAM\r |
508 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
509 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
510 | d = *(u16 *)(prg_bank+(a&0x1fffe));\r |
511 | goto end;\r |
512 | }\r |
513 | \r |
d0d47c5b |
514 | // word RAM\r |
515 | if ((a&0xfc0000)==0x200000) {\r |
516 | dprintf("m68k_wram r16: [%06x] @%06x", a, SekPc);\r |
517 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
518 | if (a >= 0x220000) {\r |
519 | dprintf("cell");\r |
520 | } else {\r |
521 | a=((a&0x1fffe)<<1);\r |
522 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
523 | d = *(u16 *)(Pico_mcd->word_ram+a);\r |
524 | }\r |
d0d47c5b |
525 | } else {\r |
526 | // allow access in any mode, like Gens does\r |
527 | d = *(u16 *)(Pico_mcd->word_ram+(a&0x3fffe));\r |
528 | }\r |
529 | dprintf("ret = %04x", d);\r |
530 | goto end;\r |
531 | }\r |
532 | \r |
bf098bc5 |
533 | //if ((a&0xffffc0)==0xa12000)\r |
534 | // dprintf("m68k_regs r16: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
535 | \r |
cc68a136 |
536 | d = (u16)OtherRead16(a, 16);\r |
537 | \r |
bf098bc5 |
538 | //if ((a&0xffffc0)==0xa12000)\r |
539 | // dprintf("ret = %04x", d);\r |
672ad671 |
540 | \r |
cc68a136 |
541 | end:\r |
542 | \r |
543 | #ifdef __debug_io\r |
544 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
545 | #endif\r |
546 | return d;\r |
547 | }\r |
548 | \r |
549 | u32 PicoReadM68k32(u32 a)\r |
550 | {\r |
551 | u32 d=0;\r |
552 | \r |
553 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
554 | \r |
555 | a&=0xfffffe;\r |
556 | \r |
557 | if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios\r |
558 | \r |
559 | // prg RAM\r |
560 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
561 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
562 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
563 | d = (pm[0]<<16)|pm[1];\r |
564 | goto end;\r |
565 | }\r |
566 | \r |
d0d47c5b |
567 | // word RAM\r |
568 | if ((a&0xfc0000)==0x200000) {\r |
569 | dprintf("m68k_wram r32: [%06x] @%06x", a, SekPc);\r |
570 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
571 | if (a >= 0x220000) {\r |
572 | dprintf("cell");\r |
573 | } else {\r |
574 | u16 *pm;\r |
575 | a=((a&0x1fffe)<<1);\r |
576 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
577 | pm=(u16 *)(Pico_mcd->word_ram+a);\r |
578 | d = (pm[0]<<16)|pm[1];\r |
579 | }\r |
d0d47c5b |
580 | } else {\r |
581 | // allow access in any mode, like Gens does\r |
582 | u16 *pm=(u16 *)(Pico_mcd->word_ram+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];\r |
583 | }\r |
584 | dprintf("ret = %08x", d);\r |
585 | goto end;\r |
586 | }\r |
587 | \r |
bf098bc5 |
588 | //if ((a&0xffffc0)==0xa12000)\r |
589 | // dprintf("m68k_regs r32: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
590 | \r |
cc68a136 |
591 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
592 | \r |
bf098bc5 |
593 | //if ((a&0xffffc0)==0xa12000)\r |
594 | // dprintf("ret = %08x", d);\r |
672ad671 |
595 | \r |
cc68a136 |
596 | end:\r |
597 | #ifdef __debug_io\r |
598 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
599 | #endif\r |
600 | return d;\r |
601 | }\r |
602 | \r |
603 | // -----------------------------------------------------------------\r |
604 | // Write Ram\r |
605 | \r |
606 | void PicoWriteM68k8(u32 a,u8 d)\r |
607 | {\r |
608 | #ifdef __debug_io\r |
609 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
610 | #endif\r |
611 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
612 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
613 | \r |
614 | \r |
615 | if ((a&0xe00000)==0xe00000) { u8 *pm=(u8 *)(Pico.ram+((a^1)&0xffff)); pm[0]=d; return; } // Ram\r |
616 | \r |
617 | a&=0xffffff;\r |
618 | \r |
619 | // prg RAM\r |
620 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
621 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
bf098bc5 |
622 | *(u8 *)(prg_bank+((a^1)&0x1ffff))=d;\r |
cc68a136 |
623 | return;\r |
624 | }\r |
625 | \r |
d0d47c5b |
626 | // word RAM\r |
627 | if ((a&0xfc0000)==0x200000) {\r |
628 | dprintf("m68k_wram w8: [%06x] %02x @%06x", a, d, SekPc);\r |
629 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
630 | if (a >= 0x220000) {\r |
631 | dprintf("cell");\r |
632 | } else {\r |
633 | a=((a&0x1fffe)<<1)|(a&1);\r |
634 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
635 | *(u8 *)(Pico_mcd->word_ram+(a^1))=d;\r |
636 | }\r |
d0d47c5b |
637 | } else {\r |
638 | // allow access in any mode, like Gens does\r |
bf098bc5 |
639 | *(u8 *)(Pico_mcd->word_ram+((a^1)&0x3ffff))=d;\r |
d0d47c5b |
640 | }\r |
641 | return;\r |
642 | }\r |
643 | \r |
bf098bc5 |
644 | //if ((a&0xffffc0)==0xa12000)\r |
645 | // dprintf("m68k_regs w8: [%02x] %02x @%06x", a&0x3f, d, SekPc);\r |
672ad671 |
646 | \r |
cc68a136 |
647 | OtherWrite8(a,d,8);\r |
648 | }\r |
649 | \r |
650 | void PicoWriteM68k16(u32 a,u16 d)\r |
651 | {\r |
652 | #ifdef __debug_io\r |
653 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
654 | #endif\r |
cc68a136 |
655 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
656 | \r |
657 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram\r |
658 | \r |
659 | a&=0xfffffe;\r |
660 | \r |
661 | // prg RAM\r |
662 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
663 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
664 | *(u16 *)(prg_bank+(a&0x1fffe))=d;\r |
665 | return;\r |
666 | }\r |
667 | \r |
d0d47c5b |
668 | // word RAM\r |
669 | if ((a&0xfc0000)==0x200000) {\r |
670 | dprintf("m68k_wram w16: [%06x] %04x @%06x", a, d, SekPc);\r |
671 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
672 | if (a >= 0x220000) {\r |
673 | dprintf("cell");\r |
674 | } else {\r |
675 | a=((a&0x1fffe)<<1);\r |
676 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
677 | *(u16 *)(Pico_mcd->word_ram+a)=d;\r |
678 | }\r |
d0d47c5b |
679 | } else {\r |
680 | // allow access in any mode, like Gens does\r |
681 | *(u16 *)(Pico_mcd->word_ram+(a&0x3fffe))=d;\r |
682 | }\r |
683 | return;\r |
684 | }\r |
685 | \r |
bf098bc5 |
686 | //if ((a&0xffffc0)==0xa12000)\r |
687 | // dprintf("m68k_regs w16: [%02x] %04x @%06x", a&0x3f, d, SekPc);\r |
cc68a136 |
688 | \r |
689 | OtherWrite16(a,d);\r |
690 | }\r |
691 | \r |
692 | void PicoWriteM68k32(u32 a,u32 d)\r |
693 | {\r |
694 | #ifdef __debug_io\r |
695 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
696 | #endif\r |
697 | \r |
698 | if ((a&0xe00000)==0xe00000)\r |
699 | {\r |
700 | // Ram:\r |
701 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
702 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
703 | return;\r |
704 | }\r |
705 | \r |
706 | a&=0xfffffe;\r |
707 | \r |
708 | // prg RAM\r |
709 | if ((a&0xfe0000)==0x020000) {\r |
672ad671 |
710 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
711 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
712 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
713 | return;\r |
714 | }\r |
715 | \r |
672ad671 |
716 | // word RAM\r |
d0d47c5b |
717 | if ((a&0xfc0000)==0x200000) {\r |
718 | if (d != 0) // don't log clears\r |
719 | dprintf("m68k_wram w32: [%06x] %08x @%06x", a, d, SekPc);\r |
720 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
bf098bc5 |
721 | if (a >= 0x220000) {\r |
722 | dprintf("cell");\r |
723 | } else {\r |
724 | u16 *pm;\r |
725 | a=((a&0x1fffe)<<1);\r |
726 | if (Pico_mcd->s68k_regs[3]&1) a+=2;\r |
727 | pm=(u16 *)(Pico_mcd->word_ram+a);\r |
728 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
729 | }\r |
d0d47c5b |
730 | } else {\r |
731 | // allow access in any mode, like Gens does\r |
732 | u16 *pm=(u16 *)(Pico_mcd->word_ram+(a&0x3fffe));\r |
733 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
734 | }\r |
672ad671 |
735 | return;\r |
d0d47c5b |
736 | }\r |
672ad671 |
737 | \r |
bf098bc5 |
738 | //if ((a&0xffffc0)==0xa12000)\r |
739 | // dprintf("m68k_regs w32: [%02x] %08x @%06x", a&0x3f, d, SekPc);\r |
cc68a136 |
740 | \r |
741 | OtherWrite16(a, (u16)(d>>16));\r |
742 | OtherWrite16(a+2,(u16)d);\r |
743 | }\r |
744 | \r |
745 | \r |
746 | // -----------------------------------------------------------------\r |
747 | \r |
748 | \r |
749 | u8 PicoReadS68k8(u32 a)\r |
750 | {\r |
751 | u32 d=0;\r |
752 | \r |
753 | a&=0xffffff;\r |
754 | \r |
755 | // prg RAM\r |
756 | if (a < 0x80000) {\r |
757 | d = *(Pico_mcd->prg_ram+(a^1));\r |
758 | goto end;\r |
759 | }\r |
760 | \r |
761 | // regs\r |
762 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
763 | //dprintf("s68k_regs r8: [%02x] @ %06x", a&0x1ff, SekPcS68k);\r |
cc68a136 |
764 | d = s68k_reg_read16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;\r |
bf098bc5 |
765 | //dprintf("ret = %02x", (u8)d);\r |
cc68a136 |
766 | goto end;\r |
767 | }\r |
768 | \r |
d0d47c5b |
769 | // word RAM (2M area)\r |
770 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
771 | dprintf("s68k_wram2M r8: [%06x] @%06x", a, SekPc);\r |
772 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
773 | // TODO (decode)\r |
774 | dprintf("(decode)");\r |
775 | } else {\r |
776 | // allow access in any mode, like Gens does\r |
777 | d = Pico_mcd->word_ram[(a^1)&0x3ffff];\r |
778 | }\r |
779 | dprintf("ret = %02x", (u8)d);\r |
780 | goto end;\r |
781 | }\r |
782 | \r |
783 | // word RAM (1M area)\r |
784 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
785 | dprintf("s68k_wram1M r8: [%06x] @%06x", a, SekPc);\r |
bf098bc5 |
786 | a=((a&0x1fffe)<<1)|(a&1);\r |
787 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
788 | d = Pico_mcd->word_ram[a^1];\r |
789 | dprintf("ret = %02x", (u8)d);\r |
d0d47c5b |
790 | goto end;\r |
791 | }\r |
792 | \r |
cc68a136 |
793 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
794 | \r |
795 | end:\r |
796 | \r |
797 | #ifdef __debug_io2\r |
798 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
799 | #endif\r |
800 | return (u8)d;\r |
801 | }\r |
802 | \r |
803 | u16 PicoReadS68k16(u32 a)\r |
804 | {\r |
805 | u16 d=0;\r |
806 | \r |
807 | a&=0xfffffe;\r |
808 | \r |
809 | // prg RAM\r |
810 | if (a < 0x80000) {\r |
811 | d = *(u16 *)(Pico_mcd->prg_ram+a);\r |
812 | goto end;\r |
813 | }\r |
814 | \r |
815 | // regs\r |
816 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
817 | //dprintf("s68k_regs r16: [%02x] @ %06x", a&0x1fe, SekPcS68k);\r |
cc68a136 |
818 | d = s68k_reg_read16(a, 16);\r |
bf098bc5 |
819 | //dprintf("ret = %04x", d);\r |
cc68a136 |
820 | goto end;\r |
821 | }\r |
822 | \r |
d0d47c5b |
823 | // word RAM (2M area)\r |
824 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
825 | dprintf("s68k_wram2M r16: [%06x] @%06x", a, SekPc);\r |
826 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
827 | // TODO (decode)\r |
828 | dprintf("(decode)");\r |
829 | } else {\r |
830 | // allow access in any mode, like Gens does\r |
831 | d = *(u16 *)(Pico_mcd->word_ram+(a&0x3fffe));\r |
832 | }\r |
833 | dprintf("ret = %04x", (u8)d);\r |
834 | goto end;\r |
835 | }\r |
836 | \r |
837 | // word RAM (1M area)\r |
838 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
839 | dprintf("s68k_wram1M r16: [%06x] @%06x", a, SekPc);\r |
bf098bc5 |
840 | a=((a&0x1fffe)<<1);\r |
841 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
842 | d = *(u16 *)(Pico_mcd->word_ram+a);\r |
843 | dprintf("ret = %04x", (u8)d);\r |
d0d47c5b |
844 | goto end;\r |
845 | }\r |
846 | \r |
cc68a136 |
847 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
848 | \r |
849 | end:\r |
850 | \r |
851 | #ifdef __debug_io2\r |
852 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
853 | #endif\r |
854 | return d;\r |
855 | }\r |
856 | \r |
857 | u32 PicoReadS68k32(u32 a)\r |
858 | {\r |
859 | u32 d=0;\r |
860 | \r |
861 | a&=0xfffffe;\r |
862 | \r |
863 | // prg RAM\r |
864 | if (a < 0x80000) {\r |
865 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
866 | d = (pm[0]<<16)|pm[1];\r |
867 | goto end;\r |
868 | }\r |
869 | \r |
870 | // regs\r |
871 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
872 | //dprintf("s68k_regs r32: [%02x] @ %06x", a&0x1fe, SekPcS68k);\r |
cc68a136 |
873 | d = (s68k_reg_read16(a, 32)<<16)|s68k_reg_read16(a+2, 32);\r |
bf098bc5 |
874 | //dprintf("ret = %08x", d);\r |
cc68a136 |
875 | goto end;\r |
876 | }\r |
877 | \r |
d0d47c5b |
878 | // word RAM (2M area)\r |
879 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
880 | dprintf("s68k_wram2M r32: [%06x] @%06x", a, SekPc);\r |
881 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
882 | // TODO (decode)\r |
883 | dprintf("(decode)");\r |
884 | } else {\r |
885 | // allow access in any mode, like Gens does\r |
886 | u16 *pm=(u16 *)(Pico_mcd->word_ram+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];\r |
887 | }\r |
888 | dprintf("ret = %08x", (u8)d);\r |
889 | goto end;\r |
890 | }\r |
891 | \r |
892 | // word RAM (1M area)\r |
893 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
bf098bc5 |
894 | u16 *pm;\r |
d0d47c5b |
895 | dprintf("s68k_wram1M 32: [%06x] @%06x", a, SekPc);\r |
bf098bc5 |
896 | a=((a&0x1fffe)<<1);\r |
897 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
898 | pm=(u16 *)(Pico_mcd->word_ram+a);\r |
899 | d = (pm[0]<<16)|pm[1];\r |
900 | dprintf("ret = %08x", (u8)d);\r |
d0d47c5b |
901 | goto end;\r |
902 | }\r |
903 | \r |
cc68a136 |
904 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
905 | \r |
906 | end:\r |
907 | \r |
908 | #ifdef __debug_io2\r |
909 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
910 | #endif\r |
911 | return d;\r |
912 | }\r |
913 | \r |
914 | // -----------------------------------------------------------------\r |
915 | \r |
916 | void PicoWriteS68k8(u32 a,u8 d)\r |
917 | {\r |
918 | #ifdef __debug_io2\r |
919 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
920 | #endif\r |
921 | \r |
922 | a&=0xffffff;\r |
923 | \r |
924 | // prg RAM\r |
925 | if (a < 0x80000) {\r |
926 | u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));\r |
927 | *pm=d;\r |
928 | return;\r |
929 | }\r |
930 | \r |
672ad671 |
931 | if (a != 0xff0011 && (a&0xff8000) == 0xff0000) // PCM hack\r |
932 | return;\r |
933 | \r |
cc68a136 |
934 | // regs\r |
935 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
936 | //dprintf("s68k_regs w8: [%02x] %02x @ %06x", a&0x1ff, d, SekPcS68k);\r |
cc68a136 |
937 | s68k_reg_write8(a,d,8);\r |
938 | return;\r |
939 | }\r |
940 | \r |
d0d47c5b |
941 | // word RAM (2M area)\r |
942 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
943 | dprintf("s68k_wram2M w8: [%06x] %02x @%06x", a, d, SekPc);\r |
944 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
945 | // TODO (decode)\r |
946 | dprintf("(decode)");\r |
947 | } else {\r |
948 | // allow access in any mode, like Gens does\r |
bf098bc5 |
949 | *(u8 *)(Pico_mcd->word_ram+((a^1)&0x3ffff))=d;\r |
d0d47c5b |
950 | }\r |
951 | return;\r |
952 | }\r |
953 | \r |
954 | // word RAM (1M area)\r |
955 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
956 | if (d)\r |
957 | dprintf("s68k_wram1M w8: [%06x] %02x @%06x", a, d, SekPc);\r |
bf098bc5 |
958 | a=((a&0x1fffe)<<1)|(a&1);\r |
959 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
960 | *(u8 *)(Pico_mcd->word_ram+(a^1))=d;\r |
d0d47c5b |
961 | return;\r |
962 | }\r |
963 | \r |
cc68a136 |
964 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
965 | }\r |
966 | \r |
967 | void PicoWriteS68k16(u32 a,u16 d)\r |
968 | {\r |
969 | #ifdef __debug_io2\r |
970 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
971 | #endif\r |
972 | \r |
973 | a&=0xfffffe;\r |
974 | \r |
975 | // prg RAM\r |
976 | if (a < 0x80000) {\r |
977 | *(u16 *)(Pico_mcd->prg_ram+a)=d;\r |
978 | return;\r |
979 | }\r |
980 | \r |
981 | // regs\r |
982 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
983 | //dprintf("s68k_regs w16: [%02x] %04x @ %06x", a&0x1ff, d, SekPcS68k);\r |
cc68a136 |
984 | s68k_reg_write8(a, d>>8, 16);\r |
985 | s68k_reg_write8(a+1,d&0xff, 16);\r |
986 | return;\r |
987 | }\r |
988 | \r |
d0d47c5b |
989 | // word RAM (2M area)\r |
990 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
991 | dprintf("s68k_wram2M w16: [%06x] %04x @%06x", a, d, SekPc);\r |
992 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
993 | // TODO (decode)\r |
994 | dprintf("(decode)");\r |
995 | } else {\r |
996 | // allow access in any mode, like Gens does\r |
997 | *(u16 *)(Pico_mcd->word_ram+(a&0x3fffe))=d;\r |
998 | }\r |
999 | return;\r |
1000 | }\r |
1001 | \r |
1002 | // word RAM (1M area)\r |
1003 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
1004 | if (d)\r |
1005 | dprintf("s68k_wram1M w16: [%06x] %04x @%06x", a, d, SekPc);\r |
bf098bc5 |
1006 | a=((a&0x1fffe)<<1);\r |
1007 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
1008 | *(u16 *)(Pico_mcd->word_ram+a)=d;\r |
d0d47c5b |
1009 | return;\r |
1010 | }\r |
1011 | \r |
cc68a136 |
1012 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
1013 | }\r |
1014 | \r |
1015 | void PicoWriteS68k32(u32 a,u32 d)\r |
1016 | {\r |
1017 | #ifdef __debug_io2\r |
1018 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1019 | #endif\r |
1020 | \r |
1021 | a&=0xfffffe;\r |
1022 | \r |
1023 | // prg RAM\r |
1024 | if (a < 0x80000) {\r |
1025 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
1026 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
1027 | return;\r |
1028 | }\r |
1029 | \r |
1030 | // regs\r |
1031 | if ((a&0xfffe00) == 0xff8000) {\r |
bf098bc5 |
1032 | //dprintf("s68k_regs w32: [%02x] %08x @ %06x", a&0x1ff, d, SekPcS68k);\r |
cc68a136 |
1033 | s68k_reg_write8(a, d>>24, 32);\r |
1034 | s68k_reg_write8(a+1,(d>>16)&0xff, 32);\r |
1035 | s68k_reg_write8(a+2,(d>>8) &0xff, 32);\r |
1036 | s68k_reg_write8(a+3, d &0xff, 32);\r |
1037 | return;\r |
1038 | }\r |
1039 | \r |
d0d47c5b |
1040 | // word RAM (2M area)\r |
1041 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
1042 | dprintf("s68k_wram2M w32: [%06x] %08x @%06x", a, d, SekPc);\r |
1043 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
1044 | // TODO (decode)\r |
1045 | dprintf("(decode)");\r |
1046 | } else {\r |
1047 | // allow access in any mode, like Gens does\r |
1048 | u16 *pm=(u16 *)(Pico_mcd->word_ram+(a&0x3fffe));\r |
1049 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
1050 | }\r |
1051 | return;\r |
1052 | }\r |
1053 | \r |
1054 | // word RAM (1M area)\r |
1055 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
bf098bc5 |
1056 | u16 *pm;\r |
d0d47c5b |
1057 | if (d)\r |
1058 | dprintf("s68k_wram1M w32: [%06x] %08x @%06x", a, d, SekPc);\r |
bf098bc5 |
1059 | a=((a&0x1fffe)<<1);\r |
1060 | if (!(Pico_mcd->s68k_regs[3]&1)) a+=2;\r |
1061 | pm=(u16 *)(Pico_mcd->word_ram+a);\r |
1062 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
d0d47c5b |
1063 | return;\r |
1064 | }\r |
cc68a136 |
1065 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1066 | }\r |
1067 | \r |
1068 | \r |
1069 | \r |
1070 | // -----------------------------------------------------------------\r |
1071 | \r |
1072 | #ifdef EMU_M68K\r |
1073 | unsigned char PicoReadCD8w (unsigned int a) {\r |
1074 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);\r |
1075 | }\r |
1076 | unsigned short PicoReadCD16w(unsigned int a) {\r |
1077 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k16(a) : PicoReadM68k16(a);\r |
1078 | }\r |
1079 | unsigned int PicoReadCD32w(unsigned int a) {\r |
1080 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k32(a) : PicoReadM68k32(a);\r |
1081 | }\r |
1082 | void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
1083 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k8(a, d); else PicoWriteM68k8(a, d);\r |
1084 | }\r |
1085 | void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
1086 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k16(a, d); else PicoWriteM68k16(a, d);\r |
1087 | }\r |
1088 | void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
1089 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k32(a, d); else PicoWriteM68k32(a, d);\r |
1090 | }\r |
1091 | \r |
1092 | // these are allowed to access RAM\r |
1093 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {\r |
1094 | a&=0xffffff;\r |
1095 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1096 | if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram\r |
1097 | else dprintf("s68k read_pcrel8 @ %06x", a);\r |
1098 | } else {\r |
1099 | if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom\r |
1100 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
1101 | }\r |
1102 | return 0;//(u8) lastread_d;\r |
1103 | }\r |
1104 | unsigned int m68k_read_pcrelative_CD16(unsigned int a) {\r |
1105 | a&=0xffffff;\r |
1106 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1107 | if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram\r |
1108 | else dprintf("s68k read_pcrel16 @ %06x", a);\r |
1109 | } else {\r |
1110 | if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom\r |
1111 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
1112 | }\r |
1113 | return 0;//(u16) lastread_d;\r |
1114 | }\r |
1115 | unsigned int m68k_read_pcrelative_CD32(unsigned int a) {\r |
1116 | a&=0xffffff;\r |
1117 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1118 | if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram\r |
1119 | else dprintf("s68k read_pcrel32 @ %06x", a);\r |
1120 | } else {\r |
1121 | if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
1122 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
1123 | }\r |
1124 | return 0; //lastread_d;\r |
1125 | }\r |
1126 | #endif // EMU_M68K\r |
1127 | \r |