d97315ac |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 1998 BERO\r |
5 | * Copyright (C) 2002 Xodnizel\r |
6 | *\r |
7 | * This program is free software; you can redistribute it and/or modify\r |
8 | * it under the terms of the GNU General Public License as published by\r |
9 | * the Free Software Foundation; either version 2 of the License, or\r |
10 | * (at your option) any later version.\r |
11 | *\r |
12 | * This program is distributed in the hope that it will be useful,\r |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
15 | * GNU General Public License for more details.\r |
16 | *\r |
17 | * You should have received a copy of the GNU General Public License\r |
18 | * along with this program; if not, write to the Free Software\r |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
20 | */\r |
21 | \r |
22 | #include "mapinc.h"\r |
23 | \r |
24 | static void GenMMC1Power(void);\r |
25 | static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery);\r |
26 | \r |
27 | static uint8 DRegs[4];\r |
28 | static uint8 Buffer,BufferShift;\r |
29 | \r |
30 | static int mmc1opts;\r |
31 | \r |
32 | static void (*MMC1CHRHook4)(uint32 A, uint8 V);\r |
33 | static void (*MMC1PRGHook16)(uint32 A, uint8 V);\r |
34 | \r |
35 | static uint8 *WRAM=NULL;\r |
36 | static uint8 *CHRRAM=NULL;\r |
37 | static int is155;\r |
38 | \r |
39 | static DECLFW(MBWRAM)\r |
40 | {\r |
41 | if(!(DRegs[3]&0x10)||is155)\r |
42 | Page[A>>11][A]=V; // WRAM is enabled.\r |
43 | }\r |
44 | \r |
45 | static DECLFR(MAWRAM)\r |
46 | {\r |
47 | if((DRegs[3]&0x10)&&!is155)\r |
48 | return X.DB; // WRAM is disabled\r |
49 | return(Page[A>>11][A]);\r |
50 | }\r |
51 | \r |
52 | static void MMC1CHR(void)\r |
53 | {\r |
54 | if(mmc1opts&4)\r |
55 | {\r |
56 | if(DRegs[0]&0x10)\r |
57 | setprg8r(0x10,0x6000,(DRegs[1]>>4)&1);\r |
58 | else\r |
59 | setprg8r(0x10,0x6000,(DRegs[1]>>3)&1);\r |
60 | }\r |
61 | if(MMC1CHRHook4)\r |
62 | {\r |
63 | if(DRegs[0]&0x10)\r |
64 | {\r |
65 | MMC1CHRHook4(0x0000,DRegs[1]);\r |
66 | MMC1CHRHook4(0x1000,DRegs[2]);\r |
67 | }\r |
68 | else\r |
69 | {\r |
70 | MMC1CHRHook4(0x0000,(DRegs[1]&0xFE));\r |
71 | MMC1CHRHook4(0x1000,DRegs[1]|1);\r |
72 | }\r |
73 | }\r |
74 | else\r |
75 | {\r |
76 | if(DRegs[0]&0x10)\r |
77 | {\r |
78 | setchr4(0x0000,DRegs[1]);\r |
79 | setchr4(0x1000,DRegs[2]);\r |
80 | }\r |
81 | else\r |
82 | setchr8(DRegs[1]>>1);\r |
83 | }\r |
84 | }\r |
85 | \r |
86 | static void MMC1PRG(void)\r |
87 | {\r |
88 | uint8 offs=DRegs[1]&0x10;\r |
89 | \r |
90 | if(MMC1PRGHook16)\r |
91 | {\r |
92 | switch(DRegs[0]&0xC)\r |
93 | {\r |
94 | case 0xC: MMC1PRGHook16(0x8000,(DRegs[3]+offs));\r |
95 | MMC1PRGHook16(0xC000,0xF+offs);\r |
96 | break;\r |
97 | case 0x8: MMC1PRGHook16(0xC000,(DRegs[3]+offs));\r |
98 | MMC1PRGHook16(0x8000,offs);\r |
99 | break;\r |
100 | case 0x0:\r |
101 | case 0x4:\r |
102 | MMC1PRGHook16(0x8000,((DRegs[3]&~1)+offs));\r |
103 | MMC1PRGHook16(0xc000,((DRegs[3]&~1)+offs+1));\r |
104 | break;\r |
105 | }\r |
106 | }\r |
107 | else switch(DRegs[0]&0xC)\r |
108 | {\r |
109 | case 0xC: setprg16(0x8000,(DRegs[3]+offs));\r |
110 | setprg16(0xC000,0xF+offs);\r |
111 | break;\r |
112 | case 0x8: setprg16(0xC000,(DRegs[3]+offs));\r |
113 | setprg16(0x8000,offs);\r |
114 | break;\r |
115 | case 0x0:\r |
116 | case 0x4:\r |
117 | setprg16(0x8000,((DRegs[3]&~1)+offs));\r |
118 | setprg16(0xc000,((DRegs[3]&~1)+offs+1));\r |
119 | break;\r |
120 | }\r |
121 | }\r |
122 | \r |
123 | static void MMC1MIRROR(void)\r |
124 | {\r |
125 | switch(DRegs[0]&3)\r |
126 | {\r |
127 | case 2: setmirror(MI_V); break;\r |
128 | case 3: setmirror(MI_H); break;\r |
129 | case 0: setmirror(MI_0); break;\r |
130 | case 1: setmirror(MI_1); break;\r |
131 | }\r |
132 | }\r |
133 | \r |
134 | \r |
135 | static uint64 lreset;\r |
136 | static DECLFW(MMC1_write)\r |
137 | {\r |
138 | int n=(A>>13)-4;\r |
139 | //FCEU_DispMessage("%016x",timestampbase+timestamp);\r |
140 | //printf("$%04x:$%02x, $%04x\n",A,V,X.PC);\r |
141 | //DumpMem("out",0xe000,0xffff);\r |
142 | \r |
143 | /* The MMC1 is busy so ignore the write. */\r |
144 | /* As of version FCE Ultra 0.81, the timestamp is only\r |
145 | increased before each instruction is executed(in other words\r |
146 | precision isn't that great), but this should still work to\r |
147 | deal with 2 writes in a row from a single RMW instruction. */\r |
148 | if((timestampbase+timestamp)<(lreset+2)) return;\r |
149 | \r |
150 | if(V&0x80)\r |
151 | {\r |
152 | DRegs[0]|=0xC;\r |
153 | BufferShift=Buffer=0;\r |
154 | MMC1PRG();\r |
155 | lreset=timestampbase+timestamp;\r |
156 | return;\r |
157 | }\r |
158 | Buffer|=(V&1)<<(BufferShift++);\r |
159 | if(BufferShift==5)\r |
160 | {\r |
161 | DRegs[n] = Buffer;\r |
162 | BufferShift = Buffer = 0;\r |
163 | switch(n)\r |
164 | {\r |
165 | case 0: MMC1MIRROR(); MMC1CHR(); MMC1PRG(); break;\r |
166 | case 1: MMC1CHR(); MMC1PRG(); break;\r |
167 | case 2: MMC1CHR(); break;\r |
168 | case 3: MMC1PRG(); break;\r |
169 | }\r |
170 | }\r |
171 | }\r |
172 | \r |
173 | static void MMC1_Restore(int version)\r |
174 | {\r |
175 | MMC1MIRROR();\r |
176 | MMC1CHR();\r |
177 | MMC1PRG();\r |
178 | //lreset=0; /* timestamp(base) is not stored in save states. */ // it is now!\r |
179 | }\r |
180 | \r |
181 | static void MMC1CMReset(void)\r |
182 | {\r |
183 | int i;\r |
184 | for(i=0;i<4;i++)\r |
185 | DRegs[i]=0;\r |
186 | Buffer = BufferShift = 0;\r |
187 | DRegs[0]=0x1F;\r |
188 | DRegs[1]=0;\r |
189 | DRegs[2]=0; // Should this be something other than 0?\r |
190 | DRegs[3]=0;\r |
191 | \r |
192 | MMC1MIRROR();\r |
193 | MMC1CHR();\r |
194 | MMC1PRG();\r |
195 | }\r |
196 | \r |
197 | static int DetectMMC1WRAMSize(uint32 crc32)\r |
198 | {\r |
199 | switch(crc32)\r |
200 | {\r |
201 | case 0xc6182024: /* Romance of the 3 Kingdoms */\r |
202 | case 0x2225c20f: /* Genghis Khan */\r |
203 | case 0x4642dda6: /* Nobunaga's Ambition */\r |
204 | case 0x29449ba9: /* "" "" (J) */\r |
205 | case 0x2b11e0b0: /* "" "" (J) */\r |
206 | FCEU_printf(" >8KB external WRAM present. Use UNIF if you hack the ROM image.\n");\r |
207 | return(16);\r |
208 | break;\r |
209 | default:return(8);\r |
210 | }\r |
211 | }\r |
212 | \r |
213 | static uint32 NWCIRQCount;\r |
214 | static uint8 NWCRec;\r |
215 | #define NWCDIP 0xE\r |
216 | \r |
217 | static void FP_FASTAPASS(1) NWCIRQHook(int a)\r |
218 | {\r |
219 | if(!(NWCRec&0x10))\r |
220 | {\r |
221 | NWCIRQCount+=a;\r |
222 | if((NWCIRQCount|(NWCDIP<<25))>=0x3e000000)\r |
223 | {\r |
224 | NWCIRQCount=0;\r |
225 | X6502_IRQBegin(FCEU_IQEXT);\r |
226 | }\r |
227 | }\r |
228 | }\r |
229 | \r |
230 | static void NWCCHRHook(uint32 A, uint8 V)\r |
231 | {\r |
232 | if((V&0x10)) // && !(NWCRec&0x10))\r |
233 | {\r |
234 | NWCIRQCount=0;\r |
235 | X6502_IRQEnd(FCEU_IQEXT);\r |
236 | }\r |
237 | NWCRec=V;\r |
238 | if(V&0x08)\r |
239 | MMC1PRG();\r |
240 | else\r |
241 | setprg32(0x8000,(V>>1)&3);\r |
242 | }\r |
243 | \r |
244 | static void NWCPRGHook(uint32 A, uint8 V)\r |
245 | {\r |
246 | if(NWCRec&0x8)\r |
247 | setprg16(A,8|(V&0x7));\r |
248 | else\r |
249 | setprg32(0x8000,(NWCRec>>1)&3);\r |
250 | }\r |
251 | \r |
252 | static void NWCPower(void)\r |
253 | {\r |
254 | GenMMC1Power();\r |
255 | setchr8r(0,0);\r |
256 | }\r |
257 | \r |
258 | void Mapper105_Init(CartInfo *info)\r |
259 | {\r |
260 | GenMMC1Init(info, 256, 256, 8, 0);\r |
261 | MMC1CHRHook4=NWCCHRHook;\r |
262 | MMC1PRGHook16=NWCPRGHook;\r |
263 | MapIRQHook=NWCIRQHook;\r |
264 | info->Power=NWCPower;\r |
265 | }\r |
266 | \r |
267 | static void GenMMC1Power(void)\r |
268 | {\r |
269 | lreset=0;\r |
270 | if(mmc1opts&1)\r |
271 | {\r |
272 | FCEU_CheatAddRAM(8,0x6000,WRAM);\r |
273 | if(mmc1opts&4)\r |
274 | FCEU_dwmemset(WRAM,0,8192)\r |
275 | else if(!(mmc1opts&2))\r |
276 | FCEU_dwmemset(WRAM,0,8192);\r |
277 | }\r |
278 | SetWriteHandler(0x8000,0xFFFF,MMC1_write);\r |
279 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
280 | \r |
281 | if(mmc1opts&1)\r |
282 | {\r |
283 | SetReadHandler(0x6000,0x7FFF,MAWRAM);\r |
284 | SetWriteHandler(0x6000,0x7FFF,MBWRAM);\r |
285 | setprg8r(0x10,0x6000,0);\r |
286 | }\r |
287 | \r |
288 | MMC1CMReset();\r |
289 | }\r |
290 | \r |
291 | static void GenMMC1Close(void)\r |
292 | {\r |
293 | if(CHRRAM)\r |
294 | FCEU_gfree(CHRRAM);\r |
295 | if(WRAM)\r |
296 | FCEU_gfree(WRAM);\r |
297 | CHRRAM=WRAM=NULL;\r |
298 | }\r |
299 | \r |
300 | static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery)\r |
301 | {\r |
302 | is155=0;\r |
303 | \r |
304 | info->Close=GenMMC1Close;\r |
305 | MMC1PRGHook16=MMC1CHRHook4=0;\r |
306 | mmc1opts=0;\r |
307 | PRGmask16[0]&=(prg>>14)-1;\r |
308 | CHRmask4[0]&=(chr>>12)-1;\r |
309 | CHRmask8[0]&=(chr>>13)-1;\r |
310 | \r |
311 | if(wram)\r |
312 | {\r |
313 | WRAM=(uint8*)FCEU_gmalloc(wram*1024);\r |
314 | mmc1opts|=1;\r |
315 | if(wram>8) mmc1opts|=4;\r |
316 | SetupCartPRGMapping(0x10,WRAM,wram*1024,1);\r |
317 | AddExState(WRAM, wram*1024, 0, "WRAM");\r |
318 | if(battery)\r |
319 | {\r |
320 | mmc1opts|=2;\r |
321 | info->SaveGame[0]=WRAM+((mmc1opts&4)?8192:0);\r |
322 | info->SaveGameLen[0]=8192;\r |
323 | }\r |
324 | }\r |
325 | if(!chr)\r |
326 | {\r |
327 | CHRRAM=(uint8*)FCEU_gmalloc(8192);\r |
328 | SetupCartCHRMapping(0, CHRRAM, 8192, 1);\r |
329 | AddExState(CHRRAM, 8192, 0, "CHRR");\r |
330 | }\r |
331 | AddExState(DRegs, 4, 0, "DREG");\r |
332 | \r |
333 | info->Power=GenMMC1Power;\r |
334 | GameStateRestore=MMC1_Restore;\r |
335 | AddExState(&lreset, 8, 1, "LRST");\r |
336 | AddExState(&Buffer, 1, 1, "BFFR");\r |
337 | AddExState(&BufferShift, 1, 1, "BFRS");\r |
338 | }\r |
339 | \r |
340 | void Mapper1_Init(CartInfo *info)\r |
341 | {\r |
342 | int ws=DetectMMC1WRAMSize(info->CRC32);\r |
343 | GenMMC1Init(info, 512, 256, ws, info->battery);\r |
344 | }\r |
345 | \r |
346 | /* Same as mapper 1, without respect for WRAM enable bit. */\r |
347 | void Mapper155_Init(CartInfo *info)\r |
348 | {\r |
349 | GenMMC1Init(info,512,256,8,info->battery);\r |
350 | is155=1;\r |
351 | }\r |
352 | \r |
353 | void SAROM_Init(CartInfo *info)\r |
354 | {\r |
355 | GenMMC1Init(info, 128, 64, 8, info->battery);\r |
356 | }\r |
357 | \r |
358 | void SBROM_Init(CartInfo *info)\r |
359 | {\r |
360 | GenMMC1Init(info, 128, 64, 0, 0);\r |
361 | }\r |
362 | \r |
363 | void SCROM_Init(CartInfo *info)\r |
364 | {\r |
365 | GenMMC1Init(info, 128, 128, 0, 0);\r |
366 | }\r |
367 | \r |
368 | void SEROM_Init(CartInfo *info)\r |
369 | {\r |
370 | GenMMC1Init(info, 32, 64, 0, 0);\r |
371 | }\r |
372 | \r |
373 | void SGROM_Init(CartInfo *info)\r |
374 | {\r |
375 | GenMMC1Init(info, 256, 0, 0, 0);\r |
376 | }\r |
377 | \r |
378 | void SKROM_Init(CartInfo *info)\r |
379 | {\r |
380 | GenMMC1Init(info, 256, 64, 8, info->battery);\r |
381 | }\r |
382 | \r |
383 | void SLROM_Init(CartInfo *info)\r |
384 | {\r |
385 | GenMMC1Init(info, 256, 128, 0, 0);\r |
386 | }\r |
387 | \r |
388 | void SL1ROM_Init(CartInfo *info)\r |
389 | {\r |
390 | GenMMC1Init(info, 128, 128, 0, 0);\r |
391 | }\r |
392 | \r |
393 | /* Begin unknown - may be wrong - perhaps they use different MMC1s from the\r |
394 | similarly functioning boards?\r |
395 | */\r |
396 | \r |
397 | void SL2ROM_Init(CartInfo *info)\r |
398 | {\r |
399 | GenMMC1Init(info, 256, 256, 0, 0);\r |
400 | }\r |
401 | \r |
402 | void SFROM_Init(CartInfo *info)\r |
403 | {\r |
404 | GenMMC1Init(info, 256, 256, 0, 0);\r |
405 | }\r |
406 | \r |
407 | void SHROM_Init(CartInfo *info)\r |
408 | {\r |
409 | GenMMC1Init(info, 256, 256, 0, 0);\r |
410 | }\r |
411 | \r |
412 | /* End unknown */\r |
413 | /* */\r |
414 | /* */\r |
415 | \r |
416 | void SNROM_Init(CartInfo *info)\r |
417 | {\r |
418 | GenMMC1Init(info, 256, 0, 8, info->battery);\r |
419 | }\r |
420 | \r |
421 | void SOROM_Init(CartInfo *info)\r |
422 | {\r |
423 | GenMMC1Init(info, 256, 0, 16, info->battery);\r |
424 | }\r |
425 | \r |
426 | \r |