c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | /* TODO: Add (better) file io error checking */ |
22 | /* TODO: Change save state file format. */ |
23 | |
24 | #include <stdio.h> |
25 | #include <stdlib.h> |
26 | #include <string.h> |
92e249b1 |
27 | #ifdef GP2X |
28 | #include <unistd.h> |
29 | #endif |
c62d2810 |
30 | |
31 | #include "types.h" |
32 | #include "x6502.h" |
33 | #include "version.h" |
34 | #include "fce.h" |
35 | #include "sound.h" |
36 | #define INESPRIV // Take this out when old save state support is removed in a future version. |
37 | #include "ines.h" |
38 | #include "svga.h" |
39 | #include "endian.h" |
40 | #include "fds.h" |
41 | #include "general.h" |
42 | #include "state.h" |
43 | #include "memory.h" |
5232c20c |
44 | #include "ppu.h" |
c62d2810 |
45 | |
46 | static SFORMAT SFMDATA[64]; |
47 | static int SFEXINDEX; |
48 | static int stateversion; |
49 | |
50 | #define RLSB 0x80000000 |
51 | |
52 | #define SFCPUELEMENTS 7 |
53 | |
54 | SFORMAT SFCPU[SFCPUELEMENTS]={ |
55 | { &X.PC, 2|RLSB, "PC\0"}, |
56 | { &X.A, 1, "A\0\0"}, |
57 | { &X.P, 1, "P\0\0"}, |
58 | { &X.X, 1, "X\0\0"}, |
59 | { &X.Y, 1, "Y\0\0"}, |
60 | { &X.S, 1, "S\0\0"}, |
61 | { RAM, 0x800, "RAM"} |
62 | }; |
63 | |
64 | #define SFCPUCELEMENTS 6 |
65 | SFORMAT SFCPUC[SFCPUCELEMENTS]={ |
66 | { &X.jammed, 1, "JAMM"}, |
67 | { &X.IRQlow, 1, "IRQL"}, |
68 | { &X.tcount, 4|RLSB, "ICoa"}, |
69 | { &X.count, 4|RLSB, "ICou"}, |
70 | { ×tamp, 4|RLSB, "TIME"}, |
71 | { ×tampbase, 8|RLSB, "TMEB"} |
72 | }; |
73 | |
74 | static uint16 TempAddrT,RefreshAddrT; |
75 | |
76 | #define SFPPUELEMENTS 10 |
77 | SFORMAT SFPPU[SFPPUELEMENTS]={ |
78 | { NTARAM, 0x800, "NTAR"}, |
79 | { PALRAM, 0x20, "PRAM"}, |
80 | { SPRAM, 0x100, "SPRA"}, |
81 | { PPU, 0x4, "PPUR"}, |
82 | { &XOffset, 1, "XOFF"}, |
83 | { &vtoggle, 1, "VTOG"}, |
84 | { &RefreshAddrT, 2|RLSB, "RADD"}, |
85 | { &TempAddrT, 2|RLSB, "TADD"}, |
86 | { &VRAMBuffer, 1, "VBUF"}, |
87 | { &PPUGenLatch, 1, "PGEN"}, |
88 | }; |
89 | |
90 | // Is this chunk necessary? I'll fix it later. |
91 | //#define SFCTLRELEMENTS 2 |
92 | //SFORMAT SFCTLR[SFCTLRELEMENTS]={ |
93 | // { &joy_readbit, 1, "J1RB"}, |
94 | // { &joy2_readbit, 1, "J2RB"} |
95 | //}; |
96 | |
97 | #define SFSNDELEMENTS 18 |
98 | SFORMAT SFSND[SFSNDELEMENTS]={ |
99 | { &fhcnt, 4|RLSB,"FHCN"}, |
100 | { &fcnt, 1, "FCNT"}, |
101 | { PSG, 14, "PSG"}, |
102 | { &PSG[0x15], 1, "P15"}, |
103 | { &PSG[0x17], 1, "P17"}, |
104 | { decvolume, 3, "DECV"}, |
105 | { &sqnon, 1, "SQNO"}, |
106 | { &nreg, 2|RLSB, "NREG"}, |
107 | { &trimode, 1, "TRIM"}, |
108 | { &tricoop, 1, "TRIC"}, |
109 | { sweepon, 2, "SWEE"}, |
110 | { &curfreq[0], 4|RLSB,"CRF1"}, |
111 | { &curfreq[1], 4|RLSB,"CRF2"}, |
112 | { SweepCount, 2,"SWCT"}, |
113 | { DecCountTo1, 3,"DCT1"}, |
114 | { &PCMBitIndex, 1,"PBIN"}, |
115 | { &PCMAddressIndex, 4|RLSB, "PAIN"}, |
116 | { &PCMSizeIndex, 4|RLSB, "PSIN"} |
117 | }; |
118 | |
119 | |
120 | int WriteStateChunk(FILE *st, int type, SFORMAT *sf, int count) |
121 | { |
122 | int bsize; |
123 | int x; |
124 | |
125 | fputc(type,st); |
22f08d95 |
126 | |
c62d2810 |
127 | for(x=bsize=0;x<count;x++) |
128 | bsize+=sf[x].s&(~RLSB); |
129 | bsize+=count<<3; |
130 | write32(bsize,st); |
131 | for(x=0;x<count;x++) |
132 | { |
133 | fwrite(sf[x].desc,1,4,st); |
134 | write32(sf[x].s&(~RLSB),st); |
135 | #ifdef LSB_FIRST |
136 | fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st); |
137 | #else |
138 | { |
139 | int z; |
140 | if(sf[x].s&RLSB) |
141 | { |
142 | for(z=(sf[x].s&(~RLSB))-1;z>=0;z--) |
143 | { |
144 | fputc(*(uint8*)sf[x].v,st); |
145 | } |
146 | } |
147 | else |
148 | fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st); |
149 | } |
150 | #endif |
151 | } |
152 | return (bsize+5); |
153 | } |
154 | |
155 | int ReadStateChunk(FILE *st, SFORMAT *sf, int count, int size) |
156 | { |
157 | uint8 tmpyo[16]; |
158 | int bsize; |
159 | int x; |
160 | |
161 | for(x=bsize=0;x<count;x++) |
162 | bsize+=sf[x].s&(~RLSB); |
163 | if(stateversion>=53) |
164 | bsize+=count<<3; |
165 | else |
166 | { |
167 | if(bsize!=size) |
168 | { |
169 | fseek(st,size,SEEK_CUR); |
170 | return 0; |
171 | } |
172 | } |
173 | |
174 | if(stateversion<56) |
175 | memcpy(tmpyo,mapbyte3,16); |
176 | |
177 | if(stateversion>=53) |
178 | { |
179 | int temp; |
180 | temp=ftell(st); |
181 | |
182 | while(ftell(st)<temp+size) |
183 | { |
184 | int tsize; |
185 | char toa[4]; |
186 | |
187 | if(fread(toa,1,4,st)<=0) |
188 | return 0; |
189 | read32(&tsize,st); |
190 | |
191 | for(x=0;x<count;x++) |
192 | { |
193 | if(!memcmp(toa,sf[x].desc,4)) |
194 | { |
195 | if(tsize!=(sf[x].s&(~RLSB))) |
196 | goto nkayo; |
197 | #ifndef LSB_FIRST |
198 | if(sf[x].s&RLSB) |
199 | { |
200 | int z; |
22f08d95 |
201 | for(z=(sf[x].s&(~RLSB))-1;z>=0;z--) |
c62d2810 |
202 | *(uint8*)sf[x].v=fgetc(st); |
203 | } |
204 | else |
205 | #endif |
206 | { |
207 | fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st); |
208 | } |
209 | goto bloo; |
210 | } |
211 | } |
212 | nkayo: |
213 | fseek(st,tsize,SEEK_CUR); |
214 | bloo:; |
215 | } // while(...) |
216 | } // >=53 |
217 | else |
218 | { |
219 | for(x=0;x<count;x++) |
220 | { |
221 | #ifdef LSB_FIRST |
222 | fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st); |
223 | #else |
224 | int z; |
225 | if(sf[x].s&RLSB) |
226 | for(z=(sf[x].s&(~RLSB))-1;z>=0;z--) |
227 | { |
228 | *(uint8*)sf[x].v=fgetc(st); |
229 | } |
230 | else |
231 | fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st); |
232 | #endif |
233 | } |
234 | } |
235 | if(stateversion<56) |
236 | { |
237 | for(x=0;x<16;x++) |
238 | #ifdef LSB_FIRST |
239 | mapbyte1[x]=mapbyte1[x<<1]; |
240 | #else |
241 | mapbyte1[x]=mapbyte1[(x<<1)+1]; |
242 | #endif |
243 | memcpy(mapbyte3,tmpyo,16); |
244 | } |
245 | return 1; |
246 | } |
247 | |
248 | int ReadStateChunks(FILE *st) |
249 | { |
250 | int t; |
251 | uint32 size; |
252 | int ret=1; |
253 | |
254 | for(;;) |
255 | { |
256 | t=fgetc(st); |
257 | if(t==EOF) break; |
258 | if(!read32(&size,st)) break; |
259 | switch(t) |
260 | { |
92e249b1 |
261 | case 1:if(!ReadStateChunk(st,SFCPU,SFCPUELEMENTS,size)) ret=0; |
262 | #ifdef ASM_6502 |
263 | asmcpu_unpack(); |
264 | #endif |
265 | break; |
c62d2810 |
266 | case 2:if(!ReadStateChunk(st,SFCPUC,SFCPUCELEMENTS,size)) ret=0; |
267 | else |
268 | { |
269 | X.mooPI=X.P; // Quick and dirty hack. |
270 | } |
271 | break; |
272 | case 3:if(!ReadStateChunk(st,SFPPU,SFPPUELEMENTS,size)) ret=0;break; |
273 | // case 4:if(!ReadStateChunk(st,SFCTLR,SFCTLRELEMENTS,size)) ret=0;break; |
274 | case 5:if(!ReadStateChunk(st,SFSND,SFSNDELEMENTS,size)) ret=0;break; |
275 | case 0x10:if(!ReadStateChunk(st,SFMDATA,SFEXINDEX,size)) ret=0;break; |
276 | default: if(fseek(st,size,SEEK_CUR)<0) goto endo;break; |
277 | } |
278 | } |
279 | endo: |
280 | return ret; |
281 | } |
282 | |
283 | |
284 | int CurrentState=0; |
285 | extern int geniestage; |
286 | void SaveState(void) |
287 | { |
288 | FILE *st=NULL; |
289 | |
290 | TempAddrT=TempAddr; |
291 | RefreshAddrT=RefreshAddr; |
292 | |
293 | if(geniestage==1) |
294 | { |
295 | FCEU_DispMessage("Cannot save FCS in GG screen."); |
296 | return; |
297 | } |
298 | |
299 | st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"wb"); |
300 | |
301 | if(st!=NULL) |
302 | { |
303 | static uint32 totalsize; |
304 | static uint8 header[16]="FCS"; |
305 | memset(header+4,0,13); |
306 | header[3]=VERSION_NUMERIC; |
307 | fwrite(header,1,16,st); |
308 | |
92e249b1 |
309 | #ifdef ASM_6502 |
310 | asmcpu_pack(); |
311 | #endif |
c62d2810 |
312 | totalsize=WriteStateChunk(st,1,SFCPU,SFCPUELEMENTS); |
313 | totalsize+=WriteStateChunk(st,2,SFCPUC,SFCPUCELEMENTS); |
314 | totalsize+=WriteStateChunk(st,3,SFPPU,SFPPUELEMENTS); |
315 | // totalsize+=WriteStateChunk(st,4,SFCTLR,SFCTLRELEMENTS); |
316 | totalsize+=WriteStateChunk(st,5,SFSND,SFSNDELEMENTS); |
317 | totalsize+=WriteStateChunk(st,0x10,SFMDATA,SFEXINDEX); |
22f08d95 |
318 | |
c62d2810 |
319 | fseek(st,4,SEEK_SET); |
320 | write32(totalsize,st); |
321 | SaveStateStatus[CurrentState]=1; |
322 | fclose(st); |
92e249b1 |
323 | #ifdef GP2X |
324 | sync(); |
325 | #endif |
c62d2810 |
326 | FCEU_DispMessage("State %d saved.",CurrentState); |
327 | } |
328 | else |
329 | FCEU_DispMessage("State %d save error.",CurrentState); |
330 | } |
331 | |
332 | static int LoadStateOld(FILE *st); |
333 | void LoadState(void) |
334 | { |
335 | int x; |
336 | FILE *st=NULL; |
337 | |
338 | if(geniestage==1) |
339 | { |
340 | FCEU_DispMessage("Cannot load FCS in GG screen."); |
341 | return; |
342 | } |
343 | |
344 | st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"rb"); |
345 | |
346 | if(st!=NULL) |
347 | { |
348 | uint8 header[16]; |
349 | |
350 | fread(&header,1,16,st); |
351 | if(memcmp(header,"FCS",3)) |
352 | { |
22f08d95 |
353 | fseek(st,0,SEEK_SET); |
c62d2810 |
354 | if(!LoadStateOld(st)) |
355 | goto lerror; |
356 | goto okload; |
357 | } |
358 | stateversion=header[3]; |
359 | if(stateversion<53) |
360 | FixOldSaveStateSFreq(); |
361 | x=ReadStateChunks(st); |
362 | if(GameStateRestore) GameStateRestore(header[3]); |
363 | if(x) |
364 | { |
365 | okload: |
366 | TempAddr=TempAddrT; |
367 | RefreshAddr=RefreshAddrT; |
368 | |
369 | SaveStateStatus[CurrentState]=1; |
370 | FCEU_DispMessage("State %d loaded.",CurrentState); |
371 | SaveStateStatus[CurrentState]=1; |
372 | } |
373 | else |
374 | { |
375 | SaveStateStatus[CurrentState]=1; |
376 | FCEU_DispMessage("Error(s) reading state %d!",CurrentState); |
377 | } |
378 | } |
379 | else |
380 | { |
381 | lerror: |
382 | FCEU_DispMessage("State %d load error.",CurrentState); |
383 | SaveStateStatus[CurrentState]=0; |
384 | return; |
385 | } |
386 | fclose(st); |
387 | } |
388 | |
389 | char SaveStateStatus[10]; |
390 | void CheckStates(void) |
391 | { |
392 | FILE *st=NULL; |
393 | int ssel; |
394 | |
22f08d95 |
395 | if(SaveStateStatus[0]==(char)-1) |
c62d2810 |
396 | for(ssel=0;ssel<10;ssel++) |
397 | { |
398 | st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb"); |
399 | if(st) |
400 | { |
401 | SaveStateStatus[ssel]=1; |
402 | fclose(st); |
403 | } |
404 | else |
405 | SaveStateStatus[ssel]=0; |
406 | } |
407 | } |
408 | |
409 | void SaveStateRefresh(void) |
410 | { |
411 | SaveStateStatus[0]=-1; |
412 | } |
413 | |
414 | void ResetExState(void) |
415 | { |
416 | int x; |
417 | for(x=0;x<SFEXINDEX;x++) |
418 | free(SFMDATA[x].desc); |
419 | SFEXINDEX=0; |
420 | } |
421 | |
422 | void AddExState(void *v, uint32 s, int type, char *desc) |
423 | { |
424 | SFMDATA[SFEXINDEX].desc=FCEU_malloc(5); |
425 | if(SFMDATA[SFEXINDEX].desc) |
426 | { |
427 | strcpy(SFMDATA[SFEXINDEX].desc,desc); |
428 | SFMDATA[SFEXINDEX].v=v; |
429 | SFMDATA[SFEXINDEX].s=s; |
430 | if(type) SFMDATA[SFEXINDEX].s|=RLSB; |
431 | if(SFEXINDEX<63) SFEXINDEX++; |
432 | } |
433 | } |
434 | |
435 | /* Old state loading code follows */ |
436 | |
437 | uint8 *StateBuffer; |
438 | unsigned int intostate; |
439 | |
440 | static void afread(void *ptr, size_t _size, size_t _nelem) |
441 | { |
442 | memcpy(ptr,StateBuffer+intostate,_size*_nelem); |
443 | intostate+=_size*_nelem; |
444 | } |
445 | |
446 | |
447 | static void areadlower8of16(int8 *d) |
448 | { |
449 | #ifdef LSB_FIRST |
450 | *d=StateBuffer[intostate++]; |
451 | #else |
452 | d[1]=StateBuffer[intostate++]; |
453 | #endif |
454 | } |
455 | |
456 | |
457 | static void areadupper8of16(int8 *d) |
458 | { |
459 | #ifdef LSB_FIRST |
460 | d[1]=StateBuffer[intostate++]; |
461 | #else |
462 | *d=StateBuffer[intostate++]; |
463 | #endif |
464 | } |
465 | |
466 | |
467 | static void aread16(int8 *d) |
468 | { |
469 | #ifdef LSB_FIRST |
470 | *d=StateBuffer[intostate++]; |
471 | d[1]=StateBuffer[intostate++]; |
472 | #else |
473 | d[1]=StateBuffer[intostate++]; |
474 | *d=StateBuffer[intostate++]; |
475 | #endif |
476 | } |
477 | |
478 | |
479 | static void aread32(int8 *d) |
480 | { |
481 | #ifdef LSB_FIRST |
482 | *d=StateBuffer[intostate++]; |
483 | d[1]=StateBuffer[intostate++]; |
484 | d[2]=StateBuffer[intostate++]; |
485 | d[3]=StateBuffer[intostate++]; |
486 | #else |
487 | d[3]=StateBuffer[intostate++]; |
488 | d[2]=StateBuffer[intostate++]; |
489 | d[1]=StateBuffer[intostate++]; |
490 | *d=StateBuffer[intostate++]; |
491 | #endif |
492 | } |
493 | |
494 | static int LoadStateOld(FILE *st) |
495 | { |
496 | int x; |
497 | int32 nada; |
498 | uint8 version; |
499 | nada=0; |
22f08d95 |
500 | |
c62d2810 |
501 | StateBuffer=FCEU_malloc(59999); |
502 | if(StateBuffer==NULL) |
503 | return 0; |
504 | if(!fread(StateBuffer,59999,1,st)) |
505 | { |
506 | fclose(st); |
507 | free(StateBuffer); |
508 | return 0; |
509 | } |
510 | |
511 | intostate=0; |
512 | |
513 | { |
514 | uint8 a[2]; |
515 | afread(&a[0],1,1); |
516 | afread(&a[1],1,1); |
517 | X.PC=a[0]|(a[1]<<8); |
518 | } |
519 | afread(&X.A,1,1); |
520 | afread(&X.P,1,1); |
521 | afread(&X.X,1,1); |
522 | afread(&X.Y,1,1); |
523 | afread(&X.S,1,1); |
524 | afread(&version,1,1); |
525 | afread(&nada,1,1); |
526 | afread(&nada,1,1); |
527 | afread(&nada,1,1); |
528 | afread(&nada,1,1); |
529 | aread32((int8 *)&X.count); |
530 | afread(&nada,1,1); |
531 | afread(&nada,1,1); |
532 | afread(&nada,1,1); |
533 | afread(&nada,1,1); |
534 | aread32((int8 *)&nada); |
535 | afread(&nada,1,1); |
536 | afread(&nada,1,1); |
537 | afread(&nada,1,1); |
538 | afread(&nada,1,1); |
22f08d95 |
539 | |
c62d2810 |
540 | for(x=0;x<8;x++) |
541 | areadupper8of16((int8 *)&CHRBankList[x]); |
542 | afread(PRGBankList,4,1); |
543 | for(x=0;x<8;x++) |
544 | areadlower8of16((int8 *)&CHRBankList[x]); |
545 | afread(CHRRAM,1,0x2000); |
546 | afread(NTARAM,1,0x400); |
547 | afread(ExtraNTARAM,1,0x400); |
548 | afread(NTARAM+0x400,1,0x400); |
549 | afread(ExtraNTARAM+0x400,1,0x400); |
550 | |
551 | for(x=0;x<0xF00;x++) |
552 | afread(&nada,1,1); |
553 | afread(PALRAM,1,0x20); |
554 | for(x=0;x<256-32;x++) |
555 | afread(&nada,1,1); |
556 | for(x=0x00;x<0x20;x++) |
557 | PALRAM[x]&=0x3f; |
558 | afread(PPU,1,4); |
559 | afread(SPRAM,1,0x100); |
560 | afread(WRAM,1,8192); |
561 | afread(RAM,1,0x800); |
562 | aread16((int8 *)&scanline); |
563 | aread16((int8 *)&RefreshAddr); |
564 | afread(&VRAMBuffer,1,1); |
22f08d95 |
565 | |
c62d2810 |
566 | afread(&IRQa,1,1); |
567 | aread32((int8 *)&IRQCount); |
568 | aread32((int8 *)&IRQLatch); |
569 | afread(&Mirroring,1,1); |
570 | afread(PSG,1,0x17); |
571 | PSG[0x11]&=0x7F; |
572 | afread(MapperExRAM,1,193); |
573 | if(version>=31) |
574 | PSG[0x17]=MapperExRAM[115]; |
575 | else |
576 | PSG[0x17]|=0x40; |
577 | PSG[0x15]&=0xF; |
578 | sqnon=PSG[0x15]; |
579 | |
580 | X.IRQlow=0; |
581 | afread(&nada,1,1); |
582 | afread(&nada,1,1); |
583 | afread(&nada,1,1); |
584 | afread(&nada,1,1); |
585 | afread(&nada,1,1); |
586 | afread(&nada,1,1); |
587 | afread(&XOffset,1,1); |
588 | PPUCHRRAM=0; |
589 | for(x=0;x<8;x++) |
590 | { |
591 | nada=0; |
592 | afread(&nada,1,1); |
22f08d95 |
593 | PPUCHRRAM|=(nada?1:0)<<x; |
c62d2810 |
594 | } |
22f08d95 |
595 | |
c62d2810 |
596 | afread(mapbyte1,1,8); |
597 | afread(mapbyte2,1,8); |
598 | afread(mapbyte3,1,8); |
599 | afread(mapbyte4,1,8); |
600 | for(x=0;x<4;x++) |
601 | aread16((int8 *)&nada); |
22f08d95 |
602 | |
c62d2810 |
603 | PPUNTARAM=0; |
604 | for(x=0;x<4;x++) |
605 | { |
606 | nada=0; |
607 | aread16((int8 *)&nada); |
608 | PPUNTARAM|=((nada&0x800)?0:1)<<x; |
609 | } |
610 | afread(MapperExRAM,1,32768); |
611 | afread(&vtoggle,1,1); |
612 | aread16((int8 *)&TempAddrT); |
613 | aread16((int8 *)&RefreshAddrT); |
22f08d95 |
614 | |
c62d2810 |
615 | if(GameStateRestore) GameStateRestore(version); |
616 | free(StateBuffer); |
617 | FixOldSaveStateSFreq(); |
618 | X.mooPI=X.P; |
619 | return 1; |
620 | } |
621 | |