d97315ac |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2002 Xodnizel\r |
5 | *\r |
6 | * This program is free software; you can redistribute it and/or modify\r |
7 | * it under the terms of the GNU General Public License as published by\r |
8 | * the Free Software Foundation; either version 2 of the License, or\r |
9 | * (at your option) any later version.\r |
10 | *\r |
11 | * This program is distributed in the hope that it will be useful,\r |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
14 | * GNU General Public License for more details.\r |
15 | *\r |
16 | * You should have received a copy of the GNU General Public License\r |
17 | * along with this program; if not, write to the Free Software\r |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | */\r |
20 | \r |
21 | #include <stdio.h>\r |
22 | #include <stdlib.h>\r |
23 | #include <string.h>\r |
24 | \r |
25 | #include "types.h"\r |
26 | #include "x6502.h"\r |
27 | #include "fce.h"\r |
28 | #include "fds.h"\r |
29 | #include "sound.h"\r |
30 | #include "general.h"\r |
31 | #include "state.h"\r |
32 | #include "file.h"\r |
33 | #include "memory.h"\r |
34 | #include "cart.h"\r |
35 | #include "md5.h"\r |
36 | #include "netplay.h"\r |
37 | \r |
38 | #include "svga.h"\r |
39 | \r |
40 | /* TODO: Add code to put a delay in between the time a disk is inserted\r |
41 | and the when it can be successfully read/written to. This should\r |
42 | prevent writes to wrong places OR add code to prevent disk ejects\r |
43 | when the virtual motor is on(mmm...virtual motor).\r |
44 | */\r |
45 | \r |
46 | static DECLFR(FDSRead4030);\r |
47 | static DECLFR(FDSRead4031);\r |
48 | static DECLFR(FDSRead4032);\r |
49 | static DECLFR(FDSRead4033);\r |
50 | \r |
51 | static DECLFW(FDSWrite);\r |
52 | \r |
53 | static DECLFW(FDSWaveWrite);\r |
54 | static DECLFR(FDSWaveRead);\r |
55 | \r |
56 | static DECLFR(FDSSRead);\r |
57 | static DECLFW(FDSSWrite);\r |
58 | static DECLFR(FDSBIOSRead);\r |
59 | static DECLFR(FDSRAMRead);\r |
60 | static DECLFW(FDSRAMWrite);\r |
61 | static void FDSInit(void);\r |
62 | static void FP_FASTAPASS(1) FDSFix(int a);\r |
63 | \r |
64 | #define FDSRAM GameMemBlock\r |
65 | #define CHRRAM (GameMemBlock+32768)\r |
66 | \r |
67 | static uint8 FDSRegs[6];\r |
68 | static int32 IRQLatch,IRQCount;\r |
69 | static uint8 IRQa;\r |
70 | static void FDSClose(void);\r |
71 | \r |
72 | static uint8 FDSBIOS[8192];\r |
73 | \r |
74 | /* Original disk data backup, to help in creating save states. */\r |
75 | static uint8 *diskdatao[8]={0,0,0,0,0,0,0,0};\r |
76 | \r |
77 | static uint8 *diskdata[8]={0,0,0,0,0,0,0,0};\r |
78 | \r |
79 | static unsigned int TotalSides;\r |
80 | static uint8 DiskWritten=0; /* Set to 1 if disk was written to. */\r |
81 | static uint8 writeskip;\r |
82 | static uint32 DiskPtr;\r |
83 | static int32 DiskSeekIRQ;\r |
84 | static uint8 SelectDisk,InDisk;\r |
85 | \r |
86 | #define DC_INC 1\r |
87 | \r |
88 | void FDSGI(int h)\r |
89 | {\r |
90 | switch(h)\r |
91 | {\r |
92 | case GI_CLOSE: FDSClose();break;\r |
93 | case GI_POWER: FDSInit();break;\r |
94 | }\r |
95 | }\r |
96 | \r |
97 | static void FDSStateRestore(int version)\r |
98 | {\r |
99 | int x;\r |
100 | \r |
101 | setmirror(((FDSRegs[5]&8)>>3)^1);\r |
102 | \r |
103 | if(version >= 9810)\r |
104 | for(x=0;x<TotalSides;x++)\r |
105 | {\r |
106 | int b;\r |
107 | for(b=0; b<65500; b++)\r |
108 | diskdata[x][b] ^= diskdatao[x][b];\r |
109 | }\r |
110 | \r |
111 | }\r |
112 | \r |
113 | void FDSSound();\r |
114 | void FDSSoundReset(void);\r |
115 | void FDSSoundStateAdd(void);\r |
116 | static void RenderSound(void);\r |
117 | //static void RenderSoundHQ(void);\r |
118 | \r |
119 | static void FDSInit(void)\r |
120 | {\r |
121 | memset(FDSRegs,0,sizeof(FDSRegs));\r |
122 | writeskip=DiskPtr=DiskSeekIRQ=0;\r |
123 | setmirror(1);\r |
124 | \r |
125 | setprg8r(0,0xe000,0); // BIOS\r |
126 | setprg32r(1,0x6000,0); // 32KB RAM\r |
127 | setchr8(0); // 8KB CHR RAM\r |
128 | \r |
129 | MapIRQHook=FDSFix;\r |
130 | GameStateRestore=FDSStateRestore;\r |
131 | \r |
132 | SetReadHandler(0x4030,0x4030,FDSRead4030);\r |
133 | SetReadHandler(0x4031,0x4031,FDSRead4031);\r |
134 | SetReadHandler(0x4032,0x4032,FDSRead4032);\r |
135 | SetReadHandler(0x4033,0x4033,FDSRead4033);\r |
136 | \r |
137 | SetWriteHandler(0x4020,0x4025,FDSWrite);\r |
138 | \r |
139 | SetWriteHandler(0x6000,0xdfff,FDSRAMWrite);\r |
140 | SetReadHandler(0x6000,0xdfff,FDSRAMRead);\r |
141 | SetReadHandler(0xE000,0xFFFF,FDSBIOSRead);\r |
142 | IRQCount=IRQLatch=IRQa=0;\r |
143 | \r |
144 | FDSSoundReset();\r |
145 | InDisk=0;\r |
146 | SelectDisk=0;\r |
147 | }\r |
148 | \r |
149 | void FCEU_FDSInsert(void)\r |
150 | {\r |
151 | if(TotalSides==0)\r |
152 | {\r |
153 | FCEU_DispMessage("Not FDS; can't eject disk.");\r |
154 | return;\r |
155 | }\r |
156 | if(InDisk==255)\r |
157 | {\r |
158 | FCEU_DispMessage("Disk %d Side %s Inserted",SelectDisk>>1,(SelectDisk&1)?"B":"A");\r |
159 | InDisk=SelectDisk;\r |
160 | }\r |
161 | else\r |
162 | {\r |
163 | FCEU_DispMessage("Disk %d Side %s Ejected",SelectDisk>>1,(SelectDisk&1)?"B":"A");\r |
164 | InDisk=255;\r |
165 | }\r |
166 | }\r |
167 | /*\r |
168 | void FCEU_FDSEject(void)\r |
169 | {\r |
170 | InDisk=255;\r |
171 | }\r |
172 | */\r |
173 | void FCEU_FDSSelect(void)\r |
174 | {\r |
175 | if(TotalSides==0)\r |
176 | {\r |
177 | FCEU_DispMessage("Not FDS; can't select disk.");\r |
178 | return;\r |
179 | }\r |
180 | if(InDisk!=255)\r |
181 | {\r |
182 | FCEU_DispMessage("Eject disk before selecting.");\r |
183 | return;\r |
184 | }\r |
185 | SelectDisk=((SelectDisk+1)%TotalSides)&3;\r |
186 | FCEU_DispMessage("Disk %d Side %c Selected",SelectDisk>>1,(SelectDisk&1)?'B':'A');\r |
187 | }\r |
188 | \r |
189 | static void FP_FASTAPASS(1) FDSFix(int a)\r |
190 | {\r |
191 | if((IRQa&2) && IRQCount)\r |
192 | {\r |
193 | IRQCount-=a;\r |
194 | if(IRQCount<=0)\r |
195 | {\r |
196 | if(!(IRQa&1))\r |
197 | {\r |
198 | IRQa&=~2;\r |
199 | IRQCount=IRQLatch=0;\r |
200 | }\r |
201 | else\r |
202 | IRQCount=IRQLatch;\r |
203 | //IRQCount=IRQLatch; //0xFFFF;\r |
204 | X6502_IRQBegin(FCEU_IQEXT);\r |
205 | //printf("IRQ: %d\n",timestamp);\r |
206 | // printf("IRQ: %d\n",scanline);\r |
207 | }\r |
208 | }\r |
209 | if(DiskSeekIRQ>0)\r |
210 | {\r |
211 | DiskSeekIRQ-=a;\r |
212 | if(DiskSeekIRQ<=0)\r |
213 | {\r |
214 | if(FDSRegs[5]&0x80)\r |
215 | {\r |
216 | X6502_IRQBegin(FCEU_IQEXT2);\r |
217 | }\r |
218 | }\r |
219 | }\r |
220 | }\r |
221 | \r |
222 | static DECLFR(FDSRead4030)\r |
223 | {\r |
224 | uint8 ret=0;\r |
225 | \r |
226 | /* Cheap hack. */\r |
227 | if(X.IRQlow&FCEU_IQEXT) ret|=1;\r |
228 | if(X.IRQlow&FCEU_IQEXT2) ret|=2;\r |
229 | \r |
230 | if(!fceuindbg)\r |
231 | {\r |
232 | X6502_IRQEnd(FCEU_IQEXT);\r |
233 | X6502_IRQEnd(FCEU_IQEXT2);\r |
234 | }\r |
235 | return ret;\r |
236 | }\r |
237 | \r |
238 | static DECLFR(FDSRead4031)\r |
239 | {\r |
240 | static uint8 z=0;\r |
241 | if(InDisk!=255)\r |
242 | {\r |
243 | z=diskdata[InDisk][DiskPtr];\r |
244 | if(!fceuindbg)\r |
245 | {\r |
246 | if(DiskPtr<64999) DiskPtr++;\r |
247 | DiskSeekIRQ=150;\r |
248 | X6502_IRQEnd(FCEU_IQEXT2);\r |
249 | }\r |
250 | }\r |
251 | return z;\r |
252 | }\r |
253 | static DECLFR(FDSRead4032)\r |
254 | {\r |
255 | uint8 ret;\r |
256 | \r |
257 | ret=X.DB&~7;\r |
258 | if(InDisk==255)\r |
259 | ret|=5;\r |
260 | \r |
261 | if(InDisk==255 || !(FDSRegs[5]&1) || (FDSRegs[5]&2))\r |
262 | ret|=2;\r |
263 | return ret;\r |
264 | }\r |
265 | \r |
266 | static DECLFR(FDSRead4033)\r |
267 | {\r |
268 | return 0x80; // battery\r |
269 | }\r |
270 | \r |
271 | static DECLFW(FDSRAMWrite)\r |
272 | {\r |
273 | (FDSRAM-0x6000)[A]=V;\r |
274 | }\r |
275 | \r |
276 | static DECLFR(FDSBIOSRead)\r |
277 | {\r |
278 | return (FDSBIOS-0xE000)[A];\r |
279 | }\r |
280 | \r |
281 | static DECLFR(FDSRAMRead)\r |
282 | {\r |
283 | return (FDSRAM-0x6000)[A];\r |
284 | }\r |
285 | \r |
286 | /* Begin FDS sound */\r |
287 | \r |
288 | #define FDSClock (1789772.7272727272727272/2)\r |
289 | \r |
290 | typedef struct {\r |
291 | int64 cycles; // Cycles per PCM sample\r |
292 | int64 count; // Cycle counter\r |
293 | int64 envcount; // Envelope cycle counter\r |
294 | uint32 b19shiftreg60;\r |
295 | uint32 b24adder66;\r |
296 | uint32 b24latch68;\r |
297 | uint32 b17latch76;\r |
298 | int32 clockcount; // Counter to divide frequency by 8.\r |
299 | uint8 b8shiftreg88; // Modulation register.\r |
300 | uint8 amplitude[2]; // Current amplitudes.\r |
301 | uint8 speedo[2];\r |
302 | uint8 mwcount;\r |
303 | uint8 mwstart;\r |
304 | uint8 mwave[0x20]; // Modulation waveform\r |
305 | uint8 cwave[0x40]; // Game-defined waveform(carrier)\r |
306 | uint8 SPSG[0xB];\r |
307 | } FDSSOUND;\r |
308 | \r |
309 | static FDSSOUND fdso;\r |
310 | \r |
311 | #define SPSG fdso.SPSG\r |
312 | #define b19shiftreg60 fdso.b19shiftreg60\r |
313 | #define b24adder66 fdso.b24adder66\r |
314 | #define b24latch68 fdso.b24latch68\r |
315 | #define b17latch76 fdso.b17latch76\r |
316 | #define b8shiftreg88 fdso.b8shiftreg88\r |
317 | #define clockcount fdso.clockcount\r |
318 | #define amplitude fdso.amplitude\r |
319 | #define speedo fdso.speedo\r |
320 | \r |
321 | void FDSSoundStateAdd(void)\r |
322 | {\r |
323 | AddExState(fdso.cwave,64,0,"WAVE");\r |
324 | AddExState(fdso.mwave,32,0,"MWAV");\r |
325 | AddExState(amplitude,2,0,"AMPL");\r |
326 | AddExState(SPSG,0xB,0,"SPSG");\r |
327 | \r |
328 | AddExState(&b8shiftreg88,1,0,"B88");\r |
329 | \r |
330 | AddExState(&clockcount, 4, 1, "CLOC");\r |
331 | AddExState(&b19shiftreg60,4,1,"B60");\r |
332 | AddExState(&b24adder66,4,1,"B66");\r |
333 | AddExState(&b24latch68,4,1,"B68");\r |
334 | AddExState(&b17latch76,4,1,"B76");\r |
335 | \r |
336 | }\r |
337 | \r |
338 | static DECLFR(FDSSRead)\r |
339 | {\r |
340 | switch(A&0xF)\r |
341 | {\r |
342 | case 0x0:return(amplitude[0]|(X.DB&0xC0));\r |
343 | case 0x2:return(amplitude[1]|(X.DB&0xC0));\r |
344 | }\r |
345 | return(X.DB);\r |
346 | }\r |
347 | \r |
348 | static DECLFW(FDSSWrite)\r |
349 | {\r |
350 | if(FSettings.SndRate)\r |
351 | {\r |
352 | #if 0\r |
353 | if(FSettings.soundq>=1)\r |
354 | RenderSoundHQ();\r |
355 | else\r |
356 | #endif\r |
357 | RenderSound();\r |
358 | }\r |
359 | A-=0x4080;\r |
360 | switch(A)\r |
361 | {\r |
362 | case 0x0:\r |
363 | case 0x4: if(V&0x80)\r |
364 | amplitude[(A&0xF)>>2]=V&0x3F; //)>0x20?0x20:(V&0x3F);\r |
365 | break;\r |
366 | case 0x5://printf("$%04x:$%02x\n",A,V);\r |
367 | break;\r |
368 | case 0x7: b17latch76=0;SPSG[0x5]=0;//printf("$%04x:$%02x\n",A,V);\r |
369 | break;\r |
370 | case 0x8:\r |
371 | b17latch76=0;\r |
372 | // printf("%d:$%02x, $%02x\n",SPSG[0x5],V,b17latch76);\r |
373 | fdso.mwave[SPSG[0x5]&0x1F]=V&0x7;\r |
374 | SPSG[0x5]=(SPSG[0x5]+1)&0x1F;\r |
375 | break;\r |
376 | }\r |
377 | //if(A>=0x7 && A!=0x8 && A<=0xF)\r |
378 | //if(A==0xA || A==0x9)\r |
379 | //printf("$%04x:$%02x\n",A,V);\r |
380 | SPSG[A]=V;\r |
381 | }\r |
382 | \r |
383 | // $4080 - Fundamental wave amplitude data register 92\r |
384 | // $4082 - Fundamental wave frequency data register 58\r |
385 | // $4083 - Same as $4082($4083 is the upper 4 bits).\r |
386 | \r |
387 | // $4084 - Modulation amplitude data register 78\r |
388 | // $4086 - Modulation frequency data register 72\r |
389 | // $4087 - Same as $4086($4087 is the upper 4 bits)\r |
390 | \r |
391 | \r |
392 | static void DoEnv()\r |
393 | {\r |
394 | int x;\r |
395 | \r |
396 | for(x=0;x<2;x++)\r |
397 | if(!(SPSG[x<<2]&0x80) && !(SPSG[0x3]&0x40))\r |
398 | {\r |
399 | static int counto[2]={0,0};\r |
400 | \r |
401 | if(counto[x]<=0)\r |
402 | {\r |
403 | if(!(SPSG[x<<2]&0x80))\r |
404 | {\r |
405 | if(SPSG[x<<2]&0x40)\r |
406 | {\r |
407 | if(amplitude[x]<0x3F)\r |
408 | amplitude[x]++;\r |
409 | }\r |
410 | else\r |
411 | {\r |
412 | if(amplitude[x]>0)\r |
413 | amplitude[x]--;\r |
414 | }\r |
415 | }\r |
416 | counto[x]=(SPSG[x<<2]&0x3F);\r |
417 | }\r |
418 | else\r |
419 | counto[x]--;\r |
420 | }\r |
421 | }\r |
422 | \r |
423 | static DECLFR(FDSWaveRead)\r |
424 | {\r |
425 | return(fdso.cwave[A&0x3f]|(X.DB&0xC0));\r |
426 | }\r |
427 | \r |
428 | static DECLFW(FDSWaveWrite)\r |
429 | {\r |
430 | //printf("$%04x:$%02x, %d\n",A,V,SPSG[0x9]&0x80);\r |
431 | if(SPSG[0x9]&0x80)\r |
432 | fdso.cwave[A&0x3f]=V&0x3F;\r |
433 | }\r |
434 | \r |
435 | static int ta;\r |
436 | static INLINE void ClockRise(void)\r |
437 | {\r |
438 | if(!clockcount)\r |
439 | {\r |
440 | ta++;\r |
441 | \r |
442 | b19shiftreg60=(SPSG[0x2]|((SPSG[0x3]&0xF)<<8));\r |
443 | b17latch76=(SPSG[0x6]|((SPSG[0x07]&0xF)<<8))+b17latch76;\r |
444 | \r |
445 | if(!(SPSG[0x7]&0x80))\r |
446 | {\r |
447 | int t=fdso.mwave[(b17latch76>>13)&0x1F]&7;\r |
448 | int t2=amplitude[1];\r |
449 | int adj = 0;\r |
450 | \r |
451 | if((t&3))\r |
452 | {\r |
453 | if((t&4))\r |
454 | adj -= (t2 * ((4 - (t&3) ) ));\r |
455 | else\r |
456 | adj += (t2 * ( (t&3) ));\r |
457 | }\r |
458 | adj *= 2;\r |
459 | if(adj > 0x7F) adj = 0x7F;\r |
460 | if(adj < -0x80) adj = -0x80;\r |
461 | //if(adj) printf("%d ",adj);\r |
462 | b8shiftreg88=0x80 + adj;\r |
463 | }\r |
464 | else\r |
465 | {\r |
466 | b8shiftreg88=0x80;\r |
467 | }\r |
468 | }\r |
469 | else\r |
470 | {\r |
471 | b19shiftreg60<<=1;\r |
472 | b8shiftreg88>>=1;\r |
473 | }\r |
474 | // b24adder66=(b24latch68+b19shiftreg60)&0x3FFFFFF;\r |
475 | b24adder66=(b24latch68+b19shiftreg60)&0x1FFFFFF;\r |
476 | }\r |
477 | \r |
478 | static INLINE void ClockFall(void)\r |
479 | {\r |
480 | //if(!(SPSG[0x7]&0x80))\r |
481 | {\r |
482 | if((b8shiftreg88&1)) // || clockcount==7)\r |
483 | b24latch68=b24adder66;\r |
484 | }\r |
485 | clockcount=(clockcount+1)&7;\r |
486 | }\r |
487 | \r |
488 | static INLINE int32 FDSDoSound(void)\r |
489 | {\r |
490 | fdso.count+=fdso.cycles;\r |
491 | if(fdso.count>=((int64)1<<40))\r |
492 | {\r |
493 | dogk:\r |
494 | fdso.count-=(int64)1<<40;\r |
495 | ClockRise();\r |
496 | ClockFall();\r |
497 | fdso.envcount--;\r |
498 | if(fdso.envcount<=0)\r |
499 | {\r |
500 | fdso.envcount+=SPSG[0xA]*3;\r |
501 | DoEnv();\r |
502 | }\r |
503 | }\r |
504 | if(fdso.count>=32768) goto dogk;\r |
505 | \r |
506 | // Might need to emulate applying the amplitude to the waveform a bit better...\r |
507 | {\r |
508 | int k=amplitude[0];\r |
509 | if(k>0x20) k=0x20;\r |
510 | return (fdso.cwave[b24latch68>>19]*k)*4/((SPSG[0x9]&0x3)+2);\r |
511 | }\r |
512 | }\r |
513 | \r |
514 | static int32 FBC=0;\r |
515 | \r |
516 | static void RenderSound(void)\r |
517 | {\r |
518 | int32 end, start;\r |
519 | int32 x;\r |
520 | \r |
521 | start=FBC;\r |
522 | end=(SOUNDTS<<16)/soundtsinc;\r |
523 | if(end<=start)\r |
524 | return;\r |
525 | FBC=end;\r |
526 | \r |
527 | if(!(SPSG[0x9]&0x80))\r |
528 | for(x=start;x<end;x++)\r |
529 | {\r |
530 | uint32 t=FDSDoSound();\r |
531 | t+=t>>1;\r |
532 | t>>=4;\r |
533 | Wave[x>>4]+=t; //(t>>2)-(t>>3); //>>3;\r |
534 | }\r |
535 | }\r |
536 | \r |
537 | #if 0\r |
538 | static void RenderSoundHQ(void)\r |
539 | {\r |
540 | int32 x;\r |
541 | \r |
542 | if(!(SPSG[0x9]&0x80))\r |
543 | for(x=FBC;x<SOUNDTS;x++)\r |
544 | {\r |
545 | uint32 t=FDSDoSound();\r |
546 | t+=t>>1;\r |
547 | WaveHi[x]+=t; //(t<<2)-(t<<1);\r |
548 | }\r |
549 | FBC=SOUNDTS;\r |
550 | }\r |
551 | #endif\r |
552 | \r |
553 | static void HQSync(int32 ts)\r |
554 | {\r |
555 | FBC=ts;\r |
556 | }\r |
557 | \r |
558 | void FDSSound(int c)\r |
559 | {\r |
560 | RenderSound();\r |
561 | FBC=c;\r |
562 | }\r |
563 | \r |
564 | /*\r |
565 | static DECLFR(FDSBIOSPatch)\r |
566 | {\r |
567 | if(FDSRegs[5]&0x4)\r |
568 | {\r |
569 | X.X=FDSRead4031(0x4031);\r |
570 | FDSWrite(0x4024,X.A);\r |
571 | X.A=X.X;\r |
572 | return(0x60);\r |
573 | }\r |
574 | else\r |
575 | {\r |
576 | return(0x58);\r |
577 | //puts("Write");\r |
578 | }\r |
579 | }\r |
580 | */\r |
581 | \r |
582 | static void FDS_ESI(void)\r |
583 | {\r |
584 | if(FSettings.SndRate)\r |
585 | {\r |
586 | #if 0\r |
587 | if(FSettings.soundq>=1)\r |
588 | {\r |
589 | fdso.cycles=(int64)1<<39;\r |
590 | }\r |
591 | else\r |
592 | #endif\r |
593 | {\r |
594 | fdso.cycles=((int64)1<<40)*FDSClock;\r |
595 | fdso.cycles/=FSettings.SndRate *16;\r |
596 | }\r |
597 | }\r |
598 | // fdso.cycles=(int64)32768*FDSClock/(FSettings.SndRate *16);\r |
599 | SetReadHandler(0x4040,0x407f,FDSWaveRead);\r |
600 | SetWriteHandler(0x4040,0x407f,FDSWaveWrite);\r |
601 | SetWriteHandler(0x4080,0x408A,FDSSWrite);\r |
602 | SetReadHandler(0x4090,0x4092,FDSSRead);\r |
603 | \r |
604 | //SetReadHandler(0xE7A3,0xE7A3,FDSBIOSPatch);\r |
605 | }\r |
606 | \r |
607 | void FDSSoundReset(void)\r |
608 | {\r |
609 | memset(&fdso,0,sizeof(fdso));\r |
610 | FDS_ESI();\r |
611 | GameExpSound.HiSync=HQSync;\r |
612 | GameExpSound.HiFill=0;//RenderSoundHQ;\r |
613 | GameExpSound.Fill=FDSSound;\r |
614 | GameExpSound.RChange=FDS_ESI;\r |
615 | }\r |
616 | \r |
617 | static DECLFW(FDSWrite)\r |
618 | {\r |
619 | //extern int scanline;\r |
620 | //FCEU_printf("$%04x:$%02x, %d\n",A,V,scanline);\r |
621 | switch(A)\r |
622 | {\r |
623 | case 0x4020:\r |
624 | X6502_IRQEnd(FCEU_IQEXT);\r |
625 | IRQLatch&=0xFF00;\r |
626 | IRQLatch|=V;\r |
627 | // printf("$%04x:$%02x\n",A,V);\r |
628 | break;\r |
629 | case 0x4021:\r |
630 | X6502_IRQEnd(FCEU_IQEXT);\r |
631 | IRQLatch&=0xFF;\r |
632 | IRQLatch|=V<<8;\r |
633 | // printf("$%04x:$%02x\n",A,V);\r |
634 | break;\r |
635 | case 0x4022:\r |
636 | X6502_IRQEnd(FCEU_IQEXT);\r |
637 | IRQCount=IRQLatch;\r |
638 | IRQa=V&3;\r |
639 | // printf("$%04x:$%02x\n",A,V);\r |
640 | break;\r |
641 | case 0x4023:break;\r |
642 | case 0x4024:\r |
643 | if(InDisk!=255 && !(FDSRegs[5]&0x4) && (FDSRegs[3]&0x1))\r |
644 | {\r |
645 | if(DiskPtr>=0 && DiskPtr<65500)\r |
646 | {\r |
647 | if(writeskip) writeskip--;\r |
648 | else if(DiskPtr>=2)\r |
649 | {\r |
650 | DiskWritten=1;\r |
651 | diskdata[InDisk][DiskPtr-2]=V;\r |
652 | }\r |
653 | }\r |
654 | }\r |
655 | break;\r |
656 | case 0x4025:\r |
657 | X6502_IRQEnd(FCEU_IQEXT2);\r |
658 | if(InDisk!=255)\r |
659 | {\r |
660 | if(!(V&0x40))\r |
661 | {\r |
662 | if(FDSRegs[5]&0x40 && !(V&0x10))\r |
663 | {\r |
664 | DiskSeekIRQ=200;\r |
665 | DiskPtr-=2;\r |
666 | }\r |
667 | if(DiskPtr<0) DiskPtr=0;\r |
668 | }\r |
669 | if(!(V&0x4)) writeskip=2;\r |
670 | if(V&2) {DiskPtr=0;DiskSeekIRQ=200;}\r |
671 | if(V&0x40) DiskSeekIRQ=200;\r |
672 | }\r |
673 | setmirror(((V>>3)&1)^1);\r |
674 | break;\r |
675 | }\r |
676 | FDSRegs[A&7]=V;\r |
677 | }\r |
678 | \r |
679 | static void FreeFDSMemory(void)\r |
680 | {\r |
681 | int x;\r |
682 | \r |
683 | for(x=0;x<TotalSides;x++)\r |
684 | if(diskdata[x])\r |
685 | {\r |
686 | free(diskdata[x]);\r |
687 | diskdata[x]=0;\r |
688 | }\r |
689 | }\r |
690 | \r |
691 | static int SubLoad(int fp)\r |
692 | {\r |
693 | struct md5_context md5;\r |
694 | uint8 header[16];\r |
695 | int x;\r |
696 | \r |
697 | FCEU_fread(header,16,1,fp);\r |
698 | \r |
699 | if(memcmp(header,"FDS\x1a",4))\r |
700 | {\r |
701 | if(!(memcmp(header+1,"*NINTENDO-HVC*",14)))\r |
702 | {\r |
703 | long t;\r |
704 | t=FCEU_fgetsize(fp);\r |
705 | if(t<65500)\r |
706 | t=65500;\r |
707 | TotalSides=t/65500;\r |
708 | FCEU_fseek(fp,0,SEEK_SET);\r |
709 | }\r |
710 | else\r |
711 | return(0);\r |
712 | }\r |
713 | else\r |
714 | TotalSides=header[4];\r |
715 | \r |
716 | md5_starts(&md5);\r |
717 | \r |
718 | if(TotalSides>8) TotalSides=8;\r |
719 | if(TotalSides<1) TotalSides=1;\r |
720 | \r |
721 | for(x=0;x<TotalSides;x++)\r |
722 | {\r |
723 | diskdata[x]=(uint8 *)FCEU_malloc(65500);\r |
724 | if(!diskdata[x])\r |
725 | {\r |
726 | int zol;\r |
727 | for(zol=0;zol<x;zol++)\r |
728 | free(diskdata[zol]);\r |
729 | return 0;\r |
730 | }\r |
731 | FCEU_fread(diskdata[x],1,65500,fp);\r |
732 | md5_update(&md5,diskdata[x],65500);\r |
733 | }\r |
734 | md5_finish(&md5,FCEUGameInfo.MD5);\r |
735 | return(1);\r |
736 | }\r |
737 | \r |
738 | static void PreSave(void)\r |
739 | {\r |
740 | int x;\r |
741 | \r |
742 | //if(DiskWritten)\r |
743 | for(x=0;x<TotalSides;x++)\r |
744 | {\r |
745 | int b;\r |
746 | for(b=0; b<65500; b++)\r |
747 | diskdata[x][b] ^= diskdatao[x][b];\r |
748 | }\r |
749 | }\r |
750 | \r |
751 | static void PostSave(void)\r |
752 | {\r |
753 | int x;\r |
754 | \r |
755 | //if(DiskWritten)\r |
756 | for(x=0;x<TotalSides;x++)\r |
757 | {\r |
758 | int b;\r |
759 | \r |
760 | for(b=0; b<65500; b++)\r |
761 | diskdata[x][b] ^= diskdatao[x][b];\r |
762 | }\r |
763 | \r |
764 | }\r |
765 | \r |
766 | int FDSLoad(const char *name, int fp)\r |
767 | {\r |
768 | FILE *zp;\r |
769 | int x;\r |
770 | char *fn;\r |
771 | \r |
772 | FCEU_fseek(fp,0,SEEK_SET);\r |
773 | \r |
774 | if(!SubLoad(fp))\r |
775 | return(0);\r |
776 | \r |
777 | \r |
778 | fn = FCEU_MakeFName(FCEUMKF_FDSROM,0,0);\r |
779 | \r |
780 | if(!(zp=FCEUD_UTF8fopen(fn,"rb")))\r |
781 | {\r |
782 | FCEU_PrintError("FDS BIOS ROM image missing!");\r |
783 | FreeFDSMemory();\r |
784 | free(fn);\r |
785 | return 0;\r |
786 | }\r |
787 | \r |
788 | free(fn);\r |
789 | \r |
790 | if(fread(FDSBIOS,1,8192,zp)!=8192)\r |
791 | {\r |
792 | fclose(zp);\r |
793 | FreeFDSMemory();\r |
794 | FCEU_PrintError("Error reading FDS BIOS ROM image.");\r |
795 | return 0;\r |
796 | }\r |
797 | \r |
798 | fclose(zp);\r |
799 | \r |
800 | \r |
801 | {\r |
802 | int tp;\r |
803 | char *fn=FCEU_MakeFName(FCEUMKF_FDS,0,0);\r |
804 | \r |
805 | int x;\r |
806 | for(x=0;x<TotalSides;x++)\r |
807 | {\r |
808 | diskdatao[x]=(uint8 *)FCEU_malloc(65500);\r |
809 | memcpy(diskdatao[x],diskdata[x],65500);\r |
810 | }\r |
811 | \r |
812 | if((tp=FCEU_fopen(fn,"rb")))\r |
813 | {\r |
814 | FreeFDSMemory();\r |
815 | if(!SubLoad(tp))\r |
816 | {\r |
817 | FCEU_PrintError("Error reading auxillary FDS file.");\r |
818 | free(fn);\r |
819 | return(0);\r |
820 | }\r |
821 | FCEU_fclose(tp);\r |
822 | DiskWritten=1; /* For save state handling. */\r |
823 | }\r |
824 | free(fn);\r |
825 | }\r |
826 | \r |
827 | FCEUGameInfo.type=GIT_FDS;\r |
828 | GameInterface=FDSGI;\r |
829 | \r |
830 | SelectDisk=0;\r |
831 | InDisk=255;\r |
832 | \r |
833 | ResetExState(PreSave,PostSave);\r |
834 | FDSSoundStateAdd();\r |
835 | \r |
836 | for(x=0;x<TotalSides;x++)\r |
837 | {\r |
838 | char temp[5];\r |
839 | sprintf(temp,"DDT%d",x);\r |
840 | AddExState(diskdata[x],65500,0,temp);\r |
841 | }\r |
842 | \r |
843 | AddExState(FDSRAM,32768,0,"FDSR");\r |
844 | AddExState(FDSRegs,sizeof(FDSRegs),0,"FREG");\r |
845 | AddExState(CHRRAM,8192,0,"CHRR");\r |
846 | AddExState(&IRQCount, 4, 1, "IRQC");\r |
847 | AddExState(&IRQLatch, 4, 1, "IQL1");\r |
848 | AddExState(&IRQa, 1, 0, "IRQA");\r |
849 | AddExState(&writeskip,1,0,"WSKI");\r |
850 | AddExState(&DiskPtr,4,1,"DPTR");\r |
851 | AddExState(&DiskSeekIRQ,4,1,"DSIR");\r |
852 | AddExState(&SelectDisk,1,0,"SELD");\r |
853 | AddExState(&InDisk,1,0,"INDI");\r |
854 | AddExState(&DiskWritten,1,0,"DSKW");\r |
855 | \r |
856 | ResetCartMapping();\r |
857 | SetupCartCHRMapping(0,CHRRAM,8192,1);\r |
858 | SetupCartMirroring(0,0,0);\r |
859 | memset(CHRRAM,0,8192);\r |
860 | memset(FDSRAM,0,32768);\r |
861 | \r |
862 | FCEU_printf(" Sides: %d\n\n",TotalSides);\r |
863 | \r |
864 | FCEUI_SetVidSystem(0);\r |
865 | \r |
866 | return 1;\r |
867 | }\r |
868 | \r |
869 | void FDSClose(void)\r |
870 | {\r |
871 | FILE *fp;\r |
872 | int x;\r |
873 | char *fn=FCEU_MakeFName(FCEUMKF_FDS,0,0);\r |
874 | \r |
875 | if(!DiskWritten) return;\r |
876 | \r |
877 | if(!(fp=FCEUD_UTF8fopen(fn,"wb")))\r |
878 | {\r |
879 | free(fn);\r |
880 | return;\r |
881 | }\r |
882 | free(fn);\r |
883 | \r |
884 | for(x=0;x<TotalSides;x++)\r |
885 | {\r |
886 | if(fwrite(diskdata[x],1,65500,fp)!=65500)\r |
887 | {\r |
888 | FCEU_PrintError("Error saving FDS image!");\r |
889 | fclose(fp);\r |
890 | return;\r |
891 | }\r |
892 | }\r |
893 | FreeFDSMemory();\r |
894 | fclose(fp);\r |
895 | }\r |