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unified menu wip and some reorganization for it
[picodrive.git] / platform / common / emu.c
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ea8c405f 1// (c) Copyright 2006-2007 notaz, All rights reserved.\r
2// Free for non-commercial use.\r
3\r
4// For commercial use, separate licencing terms must be obtained.\r
5\r
6#include <stdio.h>\r
7#include <stdlib.h>\r
8#include <ctype.h> // tolower\r
9#ifndef NO_SYNC\r
10#include <unistd.h>\r
11#endif\r
12\r
13#include "emu.h"\r
14#include "menu.h"\r
15#include "fonts.h"\r
16#include "lprintf.h"\r
58c86d00 17#include "config.h"\r
3a3947cd 18#include "common.h"\r
ea8c405f 19\r
efcba75f 20#include <pico/pico_int.h>\r
21#include <pico/patch.h>\r
22#include <pico/cd/cue.h>\r
ea8c405f 23#include <zlib/zlib.h>\r
24\r
ea8c405f 25\r
c46ffd31 26char *PicoConfigFile = "config.cfg";\r
58c86d00 27currentConfig_t currentConfig, defaultConfig;\r
eacee137 28int rom_loaded = 0;\r
ca482e5d 29char noticeMsg[64] = { 0, };\r
ea8c405f 30int state_slot = 0;\r
31int config_slot = 0, config_slot_current = 0;\r
ca482e5d 32char loadedRomFName[512] = { 0, };\r
bdec53c9 33int kb_combo_keys = 0, kb_combo_acts = 0; // keys and actions which need button combos\r
c060a9ab 34int pico_inp_mode = 0;\r
ea8c405f 35\r
36unsigned char *movie_data = NULL;\r
37static int movie_size = 0;\r
38\r
39// provided by platform code:\r
ea8c405f 40extern void emu_noticeMsgUpdated(void);\r
ca482e5d 41extern int emu_getMainDir(char *dst, int len);\r
ea8c405f 42extern void menu_romload_prepare(const char *rom_name);\r
43extern void menu_romload_end(void);\r
44\r
45\r
46// utilities\r
f8af9634 47static void strlwr_(char *string)\r
ea8c405f 48{\r
f8af9634 49 char *p;\r
50 for (p = string; *p; p++)\r
51 *p = (char)tolower(*p);\r
ea8c405f 52}\r
53\r
ca482e5d 54static int try_rfn_cut(char *fname)\r
ea8c405f 55{\r
56 FILE *tmp;\r
57 char *p;\r
58\r
ca482e5d 59 p = fname + strlen(fname) - 1;\r
60 for (; p > fname; p--)\r
ea8c405f 61 if (*p == '.') break;\r
62 *p = 0;\r
63\r
ca482e5d 64 if((tmp = fopen(fname, "rb"))) {\r
ea8c405f 65 fclose(tmp);\r
66 return 1;\r
67 }\r
68 return 0;\r
69}\r
70\r
71static void get_ext(char *file, char *ext)\r
72{\r
73 char *p;\r
74\r
75 p = file + strlen(file) - 4;\r
76 if (p < file) p = file;\r
77 strncpy(ext, p, 4);\r
78 ext[4] = 0;\r
79 strlwr_(ext);\r
80}\r
81\r
2d2247c2 82char *biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" };\r
83char *biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303" };\r
ea8c405f 84char *biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };\r
85\r
86int emu_findBios(int region, char **bios_file)\r
87{\r
88 static char bios_path[1024];\r
89 int i, count;\r
90 char **files;\r
91 FILE *f = NULL;\r
92\r
93 if (region == 4) { // US\r
94 files = biosfiles_us;\r
95 count = sizeof(biosfiles_us) / sizeof(char *);\r
96 } else if (region == 8) { // EU\r
97 files = biosfiles_eu;\r
98 count = sizeof(biosfiles_eu) / sizeof(char *);\r
99 } else if (region == 1 || region == 2) {\r
100 files = biosfiles_jp;\r
101 count = sizeof(biosfiles_jp) / sizeof(char *);\r
102 } else {\r
103 return 0;\r
104 }\r
105\r
106 for (i = 0; i < count; i++)\r
107 {\r
108 emu_getMainDir(bios_path, sizeof(bios_path));\r
109 strcat(bios_path, files[i]);\r
110 strcat(bios_path, ".bin");\r
111 f = fopen(bios_path, "rb");\r
112 if (f) break;\r
113\r
114 bios_path[strlen(bios_path) - 4] = 0;\r
115 strcat(bios_path, ".zip");\r
116 f = fopen(bios_path, "rb");\r
117 if (f) break;\r
118 }\r
119\r
120 if (f) {\r
121 lprintf("using bios: %s\n", bios_path);\r
122 fclose(f);\r
123 if (bios_file) *bios_file = bios_path;\r
124 return 1;\r
125 } else {\r
126 sprintf(menuErrorMsg, "no %s BIOS files found, read docs",\r
127 region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
128 lprintf("%s\n", menuErrorMsg);\r
129 return 0;\r
130 }\r
131}\r
132\r
c6196c0f 133/* check if the name begins with BIOS name */\r
1ca2ea4f 134/*\r
c6196c0f 135static int emu_isBios(const char *name)\r
136{\r
137 int i;\r
138 for (i = 0; i < sizeof(biosfiles_us)/sizeof(biosfiles_us[0]); i++)\r
139 if (strstr(name, biosfiles_us[i]) != NULL) return 1;\r
140 for (i = 0; i < sizeof(biosfiles_eu)/sizeof(biosfiles_eu[0]); i++)\r
141 if (strstr(name, biosfiles_eu[i]) != NULL) return 1;\r
142 for (i = 0; i < sizeof(biosfiles_jp)/sizeof(biosfiles_jp[0]); i++)\r
143 if (strstr(name, biosfiles_jp[i]) != NULL) return 1;\r
144 return 0;\r
145}\r
1ca2ea4f 146*/\r
c6196c0f 147\r
1ca2ea4f 148static unsigned char id_header[0x100];\r
58c86d00 149\r
ca482e5d 150/* checks if fname points to valid MegaCD image\r
ea8c405f 151 * if so, checks for suitable BIOS */\r
ca482e5d 152int emu_cdCheck(int *pregion, char *fname_in)\r
ea8c405f 153{\r
154 unsigned char buf[32];\r
155 pm_file *cd_f;\r
9037e45d 156 int region = 4; // 1: Japan, 4: US, 8: Europe\r
ca482e5d 157 char ext[5], *fname = fname_in;\r
9037e45d 158 cue_track_type type = CT_UNKNOWN;\r
159 cue_data_t *cue_data = NULL;\r
b923ecbe 160\r
ca482e5d 161 get_ext(fname_in, ext);\r
9037e45d 162 if (strcasecmp(ext, ".cue") == 0) {\r
ca482e5d 163 cue_data = cue_parse(fname_in);\r
9037e45d 164 if (cue_data != NULL) {\r
165 fname = cue_data->tracks[1].fname;\r
166 type = cue_data->tracks[1].type;\r
167 }\r
f9f40f10 168 else\r
169 return -1;\r
9037e45d 170 }\r
171\r
172 cd_f = pm_open(fname);\r
173 if (cue_data != NULL)\r
174 cue_destroy(cue_data);\r
ea8c405f 175\r
f9f40f10 176 if (cd_f == NULL) return 0; // let the upper level handle this\r
ea8c405f 177\r
178 if (pm_read(buf, 32, cd_f) != 32) {\r
179 pm_close(cd_f);\r
f9f40f10 180 return -1;\r
ea8c405f 181 }\r
182\r
9037e45d 183 if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) {\r
184 if (type && type != CT_ISO)\r
185 elprintf(EL_STATUS, ".cue has wrong type: %i", type);\r
186 type = CT_ISO; // Sega CD (ISO)\r
187 }\r
188 if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) {\r
189 if (type && type != CT_BIN)\r
190 elprintf(EL_STATUS, ".cue has wrong type: %i", type);\r
191 type = CT_BIN; // Sega CD (BIN)\r
192 }\r
193\r
194 if (type == CT_UNKNOWN) {\r
ea8c405f 195 pm_close(cd_f);\r
196 return 0;\r
197 }\r
198\r
9037e45d 199 pm_seek(cd_f, (type == CT_ISO) ? 0x100 : 0x110, SEEK_SET);\r
1ca2ea4f 200 pm_read(id_header, sizeof(id_header), cd_f);\r
58c86d00 201\r
ea8c405f 202 /* it seems we have a CD image here. Try to detect region now.. */\r
9037e45d 203 pm_seek(cd_f, (type == CT_ISO) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);\r
ea8c405f 204 pm_read(buf, 1, cd_f);\r
205 pm_close(cd_f);\r
206\r
207 if (buf[0] == 0x64) region = 8; // EU\r
208 if (buf[0] == 0xa1) region = 1; // JAP\r
209\r
210 lprintf("detected %s Sega/Mega CD image with %s region\n",\r
9037e45d 211 type == CT_BIN ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
ea8c405f 212\r
213 if (pregion != NULL) *pregion = region;\r
214\r
215 return type;\r
216}\r
217\r
7a87643e 218static int extract_text(char *dest, const unsigned char *src, int len, int swab)\r
58c86d00 219{\r
220 char *p = dest;\r
221 int i;\r
222\r
223 if (swab) swab = 1;\r
224\r
225 for (i = len - 1; i >= 0; i--)\r
226 {\r
227 if (src[i^swab] != ' ') break;\r
228 }\r
229 len = i + 1;\r
230\r
231 for (i = 0; i < len; i++)\r
232 {\r
233 unsigned char s = src[i^swab];\r
234 if (s >= 0x20 && s < 0x7f && s != '#' && s != '|' &&\r
235 s != '[' && s != ']' && s != '\\')\r
236 {\r
237 *p++ = s;\r
238 }\r
239 else\r
240 {\r
241 sprintf(p, "\\%02x", s);\r
242 p += 3;\r
243 }\r
244 }\r
245\r
246 return p - dest;\r
247}\r
248\r
249char *emu_makeRomId(void)\r
250{\r
ca482e5d 251 static char id_string[3+0xe*3+0x3*3+0x30*3+3];\r
bdec53c9 252 int pos, swab = 1;\r
58c86d00 253\r
602133e1 254 if (PicoAHW & PAHW_MCD) {\r
bdec53c9 255 strcpy(id_string, "CD|");\r
256 swab = 0;\r
257 }\r
1ca2ea4f 258 else strcpy(id_string, "MD|");\r
58c86d00 259 pos = 3;\r
260\r
bdec53c9 261 pos += extract_text(id_string + pos, id_header + 0x80, 0x0e, swab); // serial\r
58c86d00 262 id_string[pos] = '|'; pos++;\r
bdec53c9 263 pos += extract_text(id_string + pos, id_header + 0xf0, 0x03, swab); // region\r
58c86d00 264 id_string[pos] = '|'; pos++;\r
bdec53c9 265 pos += extract_text(id_string + pos, id_header + 0x50, 0x30, swab); // overseas name\r
58c86d00 266 id_string[pos] = 0;\r
267\r
58c86d00 268 return id_string;\r
269}\r
270\r
ca482e5d 271// buffer must be at least 150 byte long\r
272void emu_getGameName(char *str150)\r
273{\r
274 int ret, swab = (PicoAHW & PAHW_MCD) ? 0 : 1;\r
275 char *s, *d;\r
276\r
277 ret = extract_text(str150, id_header + 0x50, 0x30, swab); // overseas name\r
278\r
279 for (s = d = str150 + 1; s < str150+ret; s++)\r
280 {\r
281 if (*s == 0) break;\r
282 if (*s != ' ' || d[-1] != ' ')\r
283 *d++ = *s;\r
284 }\r
285 *d = 0;\r
286}\r
287\r
288// note: this function might mangle rom_fname\r
289int emu_ReloadRom(char *rom_fname)\r
ea8c405f 290{\r
291 unsigned int rom_size = 0;\r
ca482e5d 292 char *used_rom_name = rom_fname;\r
eacee137 293 unsigned char *rom_data = NULL;\r
ea8c405f 294 char ext[5];\r
f9f40f10 295 pm_file *rom = NULL;\r
ea8c405f 296 int ret, cd_state, cd_region, cfg_loaded = 0;\r
297\r
ca482e5d 298 lprintf("emu_ReloadRom(%s)\n", rom_fname);\r
ea8c405f 299\r
ca482e5d 300 get_ext(rom_fname, ext);\r
ea8c405f 301\r
302 // detect wrong extensions\r
eacee137 303 if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz\r
f9f40f10 304 sprintf(menuErrorMsg, "Not a ROM/CD selected.");\r
ea8c405f 305 return 0;\r
306 }\r
307\r
308 PicoPatchUnload();\r
309\r
310 // check for movie file\r
eacee137 311 if (movie_data) {\r
ea8c405f 312 free(movie_data);\r
313 movie_data = 0;\r
314 }\r
2d2247c2 315 if (!strcmp(ext, ".gmv"))\r
316 {\r
ea8c405f 317 // check for both gmv and rom\r
318 int dummy;\r
ca482e5d 319 FILE *movie_file = fopen(rom_fname, "rb");\r
ea8c405f 320 if(!movie_file) {\r
321 sprintf(menuErrorMsg, "Failed to open movie.");\r
322 return 0;\r
323 }\r
324 fseek(movie_file, 0, SEEK_END);\r
325 movie_size = ftell(movie_file);\r
326 fseek(movie_file, 0, SEEK_SET);\r
327 if(movie_size < 64+3) {\r
328 sprintf(menuErrorMsg, "Invalid GMV file.");\r
329 fclose(movie_file);\r
330 return 0;\r
331 }\r
332 movie_data = malloc(movie_size);\r
333 if(movie_data == NULL) {\r
334 sprintf(menuErrorMsg, "low memory.");\r
335 fclose(movie_file);\r
336 return 0;\r
337 }\r
338 fread(movie_data, 1, movie_size, movie_file);\r
339 fclose(movie_file);\r
340 if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
341 sprintf(menuErrorMsg, "Invalid GMV file.");\r
342 return 0;\r
343 }\r
ca482e5d 344 dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);\r
ea8c405f 345 if (!dummy) {\r
346 sprintf(menuErrorMsg, "Could't find a ROM for movie.");\r
347 return 0;\r
348 }\r
ca482e5d 349 get_ext(rom_fname, ext);\r
f8af9634 350 lprintf("gmv loaded for %s\n", rom_fname);\r
ea8c405f 351 }\r
ca482e5d 352 else if (!strcmp(ext, ".pat"))\r
353 {\r
ea8c405f 354 int dummy;\r
ca482e5d 355 PicoPatchLoad(rom_fname);\r
356 dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);\r
ea8c405f 357 if (!dummy) {\r
358 sprintf(menuErrorMsg, "Could't find a ROM to patch.");\r
359 return 0;\r
360 }\r
ca482e5d 361 get_ext(rom_fname, ext);\r
ea8c405f 362 }\r
363\r
ca482e5d 364 emu_shutdownMCD();\r
ea8c405f 365\r
366 // check for MegaCD image\r
ca482e5d 367 cd_state = emu_cdCheck(&cd_region, rom_fname);\r
f9f40f10 368 if (cd_state >= 0 && cd_state != CIT_NOT_CD)\r
ea8c405f 369 {\r
602133e1 370 PicoAHW |= PAHW_MCD;\r
ea8c405f 371 // valid CD image, check for BIOS..\r
372\r
373 // we need to have config loaded at this point\r
374 ret = emu_ReadConfig(1, 1);\r
375 if (!ret) emu_ReadConfig(0, 1);\r
376 cfg_loaded = 1;\r
377\r
378 if (PicoRegionOverride) {\r
379 cd_region = PicoRegionOverride;\r
380 lprintf("overrided region to %s\n", cd_region != 4 ? (cd_region == 8 ? "EU" : "JAP") : "USA");\r
381 }\r
382 if (!emu_findBios(cd_region, &used_rom_name)) {\r
383 // bios_help() ?\r
602133e1 384 PicoAHW &= ~PAHW_MCD;\r
ea8c405f 385 return 0;\r
386 }\r
387\r
ea8c405f 388 get_ext(used_rom_name, ext);\r
389 }\r
390 else\r
391 {\r
602133e1 392 if (PicoAHW & PAHW_MCD) Stop_CD();\r
393 PicoAHW &= ~PAHW_MCD;\r
ea8c405f 394 }\r
395\r
396 rom = pm_open(used_rom_name);\r
eacee137 397 if (!rom) {\r
f9f40f10 398 sprintf(menuErrorMsg, "Failed to open ROM/CD image");\r
399 goto fail;\r
400 }\r
401\r
402 if (cd_state < 0) {\r
403 sprintf(menuErrorMsg, "Invalid CD image");\r
404 goto fail;\r
ea8c405f 405 }\r
406\r
4b167c12 407 menu_romload_prepare(used_rom_name); // also CD load\r
ea8c405f 408\r
eacee137 409 PicoCartUnload();\r
410 rom_loaded = 0;\r
ea8c405f 411\r
eacee137 412 if ( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {\r
f8af9634 413 if (ret == 2) sprintf(menuErrorMsg, "Out of memory");\r
414 else if (ret == 3) sprintf(menuErrorMsg, "Read failed");\r
415 else sprintf(menuErrorMsg, "PicoCartLoad() failed.");\r
ea8c405f 416 lprintf("%s\n", menuErrorMsg);\r
f9f40f10 417 goto fail2;\r
ea8c405f 418 }\r
419 pm_close(rom);\r
f9f40f10 420 rom = NULL;\r
ea8c405f 421\r
422 // detect wrong files (Pico crashes on very small files), also see if ROM EP is good\r
eacee137 423 if (rom_size <= 0x200 || strncmp((char *)rom_data, "Pico", 4) == 0 ||\r
ea8c405f 424 ((*(unsigned char *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {\r
425 if (rom_data) free(rom_data);\r
ea8c405f 426 sprintf(menuErrorMsg, "Not a ROM selected.");\r
f9f40f10 427 goto fail2;\r
ea8c405f 428 }\r
429\r
430 // load config for this ROM (do this before insert to get correct region)\r
602133e1 431 if (!(PicoAHW & PAHW_MCD))\r
1ca2ea4f 432 memcpy(id_header, rom_data + 0x100, sizeof(id_header));\r
ea8c405f 433 if (!cfg_loaded) {\r
434 ret = emu_ReadConfig(1, 1);\r
435 if (!ret) emu_ReadConfig(0, 1);\r
436 }\r
437\r
438 lprintf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);\r
eacee137 439 if (PicoCartInsert(rom_data, rom_size)) {\r
ea8c405f 440 sprintf(menuErrorMsg, "Failed to load ROM.");\r
f9f40f10 441 goto fail2;\r
ea8c405f 442 }\r
443\r
ea8c405f 444 // insert CD if it was detected\r
b923ecbe 445 if (cd_state != CIT_NOT_CD) {\r
ca482e5d 446 ret = Insert_CD(rom_fname, cd_state);\r
ea8c405f 447 if (ret != 0) {\r
448 sprintf(menuErrorMsg, "Insert_CD() failed, invalid CD image?");\r
449 lprintf("%s\n", menuErrorMsg);\r
f9f40f10 450 goto fail2;\r
ea8c405f 451 }\r
452 }\r
453\r
4b167c12 454 menu_romload_end();\r
455\r
ea8c405f 456 if (PicoPatches) {\r
457 PicoPatchPrepare();\r
458 PicoPatchApply();\r
459 }\r
460\r
461 // additional movie stuff\r
f9f40f10 462 if (movie_data)\r
463 {\r
464 if (movie_data[0x14] == '6')\r
602133e1 465 PicoOpt |= POPT_6BTN_PAD; // 6 button pad\r
466 else PicoOpt &= ~POPT_6BTN_PAD;\r
2aa27095 467 PicoOpt |= POPT_DIS_VDP_FIFO; // no VDP fifo timing\r
f9f40f10 468 if (movie_data[0xF] >= 'A') {\r
469 if (movie_data[0x16] & 0x80) {\r
ea8c405f 470 PicoRegionOverride = 8;\r
471 } else {\r
472 PicoRegionOverride = 4;\r
473 }\r
1cb1584b 474 PicoReset();\r
ea8c405f 475 // TODO: bits 6 & 5\r
476 }\r
477 movie_data[0x18+30] = 0;\r
478 sprintf(noticeMsg, "MOVIE: %s", (char *) &movie_data[0x18]);\r
479 }\r
480 else\r
481 {\r
602133e1 482 PicoOpt &= ~POPT_DIS_VDP_FIFO;\r
f9f40f10 483 if (Pico.m.pal) {\r
ea8c405f 484 strcpy(noticeMsg, "PAL SYSTEM / 50 FPS");\r
485 } else {\r
486 strcpy(noticeMsg, "NTSC SYSTEM / 60 FPS");\r
487 }\r
488 }\r
489 emu_noticeMsgUpdated();\r
490\r
491 // load SRAM for this ROM\r
ca482e5d 492 if (currentConfig.EmuOpt & EOPT_USE_SRAM)\r
ea8c405f 493 emu_SaveLoadGame(1, 1);\r
494\r
ca482e5d 495 strncpy(loadedRomFName, rom_fname, sizeof(loadedRomFName)-1);\r
496 loadedRomFName[sizeof(loadedRomFName)-1] = 0;\r
eacee137 497 rom_loaded = 1;\r
ea8c405f 498 return 1;\r
f9f40f10 499\r
500fail2:\r
501 menu_romload_end();\r
502fail:\r
503 if (rom != NULL) pm_close(rom);\r
504 return 0;\r
ea8c405f 505}\r
506\r
507\r
ca482e5d 508void emu_shutdownMCD(void)\r
509{\r
510 if ((PicoAHW & PAHW_MCD) && Pico_mcd != NULL)\r
511 Stop_CD();\r
512 PicoAHW &= ~PAHW_MCD;\r
513}\r
514\r
ea8c405f 515static void romfname_ext(char *dst, const char *prefix, const char *ext)\r
516{\r
517 char *p;\r
518 int prefix_len = 0;\r
519\r
520 // make save filename\r
ca482e5d 521 p = loadedRomFName+strlen(loadedRomFName)-1;\r
522 for (; p >= loadedRomFName && *p != PATH_SEP_C; p--); p++;\r
ea8c405f 523 *dst = 0;\r
524 if (prefix) {\r
ca482e5d 525 int len = emu_getMainDir(dst, 512);\r
526 strcpy(dst + len, prefix);\r
527 prefix_len = len + strlen(prefix);\r
ea8c405f 528 }\r
ca482e5d 529#ifdef UIQ3\r
530 else p = loadedRomFName; // backward compatibility\r
531#endif\r
ea8c405f 532 strncpy(dst + prefix_len, p, 511-prefix_len);\r
533 dst[511-8] = 0;\r
534 if (dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;\r
535 if (ext) strcat(dst, ext);\r
536}\r
537\r
538\r
08fe8094 539static void make_config_cfg(char *cfg)\r
540{\r
ca482e5d 541 int len;\r
542 len = emu_getMainDir(cfg, 512);\r
543 strncpy(cfg + len, PicoConfigFile, 512-6-1-len);\r
08fe8094 544 if (config_slot != 0)\r
545 {\r
546 char *p = strrchr(cfg, '.');\r
547 if (p == NULL) p = cfg + strlen(cfg);\r
548 sprintf(p, ".%i.cfg", config_slot);\r
549 }\r
550 cfg[511] = 0;\r
551}\r
552\r
ca482e5d 553void emu_packConfig(void)\r
554{\r
555 currentConfig.s_PicoOpt = PicoOpt;\r
556 currentConfig.s_PsndRate = PsndRate;\r
557 currentConfig.s_PicoRegion = PicoRegionOverride;\r
558 currentConfig.s_PicoAutoRgnOrder = PicoAutoRgnOrder;\r
559 currentConfig.s_PicoCDBuffers = PicoCDBuffers;\r
560}\r
561\r
562void emu_unpackConfig(void)\r
563{\r
564 PicoOpt = currentConfig.s_PicoOpt;\r
565 PsndRate = currentConfig.s_PsndRate;\r
566 PicoRegionOverride = currentConfig.s_PicoRegion;\r
567 PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
568 PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
569}\r
570\r
571static void emu_setDefaultConfig(void)\r
572{\r
573 memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
574 emu_unpackConfig();\r
575}\r
576\r
577\r
ea8c405f 578int emu_ReadConfig(int game, int no_defaults)\r
579{\r
58c86d00 580 char cfg[512];\r
58c86d00 581 int ret;\r
ea8c405f 582\r
583 if (!game)\r
584 {\r
585 if (!no_defaults)\r
ea8c405f 586 emu_setDefaultConfig();\r
08fe8094 587 make_config_cfg(cfg);\r
58c86d00 588 ret = config_readsect(cfg, NULL);\r
ea8c405f 589 }\r
58c86d00 590 else\r
591 {\r
1ca2ea4f 592 char *sect = emu_makeRomId();\r
ea8c405f 593\r
58c86d00 594 // try new .cfg way\r
595 if (config_slot != 0)\r
596 sprintf(cfg, "game.%i.cfg", config_slot);\r
597 else strcpy(cfg, "game.cfg");\r
1ca2ea4f 598\r
599 ret = -1;\r
08fe8094 600 if (config_havesect(cfg, sect))\r
601 {\r
602 // read user's config\r
7b802576 603 int vol = currentConfig.volume;\r
1ca2ea4f 604 emu_setDefaultConfig();\r
605 ret = config_readsect(cfg, sect);\r
7b802576 606 currentConfig.volume = vol; // make vol global (bah)\r
1ca2ea4f 607 }\r
a39b7867 608 else\r
08fe8094 609 {\r
610 // read global config, and apply game_def.cfg on top\r
611 make_config_cfg(cfg);\r
612 config_readsect(cfg, NULL);\r
613 ret = config_readsect("game_def.cfg", sect);\r
614 }\r
58c86d00 615\r
ca482e5d 616 if (ret == 0)\r
58c86d00 617 {\r
1ca2ea4f 618 lprintf("loaded cfg from sect \"%s\"\n", sect);\r
58c86d00 619 }\r
ea8c405f 620 }\r
58c86d00 621\r
ea8c405f 622 // some sanity checks\r
623 if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;\r
2445b7cb 624#ifdef PSP\r
625 if (currentConfig.gamma < -4 || currentConfig.gamma > 16) currentConfig.gamma = 0;\r
6fc57144 626 if (currentConfig.gamma2 < 0 || currentConfig.gamma2 > 2) currentConfig.gamma2 = 0;\r
2445b7cb 627#else\r
ea8c405f 628 if (currentConfig.gamma < 10 || currentConfig.gamma > 300) currentConfig.gamma = 100;\r
2445b7cb 629#endif\r
ea8c405f 630 if (currentConfig.volume < 0 || currentConfig.volume > 99) currentConfig.volume = 50;\r
9839d126 631#ifdef __GP2X__\r
ea8c405f 632 // if volume keys are unbound, bind them to volume control\r
633 if (!currentConfig.KeyBinds[23] && !currentConfig.KeyBinds[22]) {\r
634 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
635 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
636 }\r
9839d126 637#endif\r
58c86d00 638 if (ret == 0) config_slot_current = config_slot;\r
639 return (ret == 0);\r
ea8c405f 640}\r
641\r
642\r
58c86d00 643int emu_WriteConfig(int is_game)\r
ea8c405f 644{\r
58c86d00 645 char cfg[512], *game_sect = NULL;\r
646 int ret, write_lrom = 0;\r
ea8c405f 647\r
58c86d00 648 if (!is_game)\r
ea8c405f 649 {\r
ca482e5d 650 make_config_cfg(cfg);\r
58c86d00 651 write_lrom = 1;\r
ea8c405f 652 } else {\r
653 if (config_slot != 0)\r
58c86d00 654 sprintf(cfg, "game.%i.cfg", config_slot);\r
655 else strcpy(cfg, "game.cfg");\r
656 game_sect = emu_makeRomId();\r
1ca2ea4f 657 lprintf("emu_WriteConfig: sect \"%s\"\n", game_sect);\r
ea8c405f 658 }\r
659\r
660 lprintf("emu_WriteConfig: %s ", cfg);\r
58c86d00 661 ret = config_writesect(cfg, game_sect);\r
1ca2ea4f 662 if (write_lrom) config_writelrom(cfg);\r
ea8c405f 663#ifndef NO_SYNC\r
58c86d00 664 sync();\r
ea8c405f 665#endif\r
58c86d00 666 lprintf((ret == 0) ? "(ok)\n" : "(failed)\n");\r
ea8c405f 667\r
58c86d00 668 if (ret == 0) config_slot_current = config_slot;\r
669 return ret == 0;\r
ea8c405f 670}\r
671\r
672\r
d7dd4d66 673void emu_writelrom(void)\r
674{\r
675 char cfg[512];\r
676 make_config_cfg(cfg);\r
677 config_writelrom(cfg);\r
678#ifndef NO_SYNC\r
679 sync();\r
680#endif\r
681}\r
682\r
ca482e5d 683#ifndef UIQ3\r
ea8c405f 684void emu_textOut8(int x, int y, const char *text)\r
685{\r
686 int i,l,len=strlen(text);\r
687 unsigned char *screen = (unsigned char *)SCREEN_BUFFER + x + y*SCREEN_WIDTH;\r
688\r
689 /* always using built-in font */\r
690 for (i = 0; i < len; i++)\r
691 {\r
692 for (l=0;l<8;l++)\r
693 {\r
694 unsigned char fd = fontdata8x8[((text[i])*8)+l];\r
695 if (fd&0x80) screen[l*SCREEN_WIDTH+0]=0xf0;\r
696 if (fd&0x40) screen[l*SCREEN_WIDTH+1]=0xf0;\r
697 if (fd&0x20) screen[l*SCREEN_WIDTH+2]=0xf0;\r
698 if (fd&0x10) screen[l*SCREEN_WIDTH+3]=0xf0;\r
699 if (fd&0x08) screen[l*SCREEN_WIDTH+4]=0xf0;\r
700 if (fd&0x04) screen[l*SCREEN_WIDTH+5]=0xf0;\r
701 if (fd&0x02) screen[l*SCREEN_WIDTH+6]=0xf0;\r
702 if (fd&0x01) screen[l*SCREEN_WIDTH+7]=0xf0;\r
703 }\r
704 screen += 8;\r
705 }\r
706}\r
707\r
708void emu_textOut16(int x, int y, const char *text)\r
709{\r
710 int i,l,len=strlen(text);\r
711 unsigned short *screen = (unsigned short *)SCREEN_BUFFER + x + y*SCREEN_WIDTH;\r
712\r
713 for (i = 0; i < len; i++)\r
714 {\r
715 for (l=0;l<8;l++)\r
716 {\r
717 unsigned char fd = fontdata8x8[((text[i])*8)+l];\r
718 if(fd&0x80) screen[l*SCREEN_WIDTH+0]=0xffff;\r
719 if(fd&0x40) screen[l*SCREEN_WIDTH+1]=0xffff;\r
720 if(fd&0x20) screen[l*SCREEN_WIDTH+2]=0xffff;\r
721 if(fd&0x10) screen[l*SCREEN_WIDTH+3]=0xffff;\r
722 if(fd&0x08) screen[l*SCREEN_WIDTH+4]=0xffff;\r
723 if(fd&0x04) screen[l*SCREEN_WIDTH+5]=0xffff;\r
724 if(fd&0x02) screen[l*SCREEN_WIDTH+6]=0xffff;\r
725 if(fd&0x01) screen[l*SCREEN_WIDTH+7]=0xffff;\r
726 }\r
727 screen += 8;\r
728 }\r
729}\r
ca482e5d 730#endif\r
ea8c405f 731\r
6fc57144 732#ifdef PSP\r
733#define MAX_COMBO_KEY 23\r
734#else\r
735#define MAX_COMBO_KEY 31\r
736#endif\r
737\r
bdec53c9 738void emu_findKeyBindCombos(void)\r
739{\r
740 int act, u;\r
741\r
742 // find out which keys and actions are combos\r
743 kb_combo_keys = kb_combo_acts = 0;\r
744 for (act = 0; act < 32; act++)\r
745 {\r
746 int keyc = 0, keyc2 = 0;\r
747 if (act == 16 || act == 17) continue; // player2 flag\r
748 if (act > 17)\r
749 {\r
6fc57144 750 for (u = 0; u <= MAX_COMBO_KEY; u++)\r
bdec53c9 751 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
752 }\r
753 else\r
754 {\r
6fc57144 755 for (u = 0; u <= MAX_COMBO_KEY; u++)\r
bdec53c9 756 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1\r
757 (currentConfig.KeyBinds[u] & (1 << act))) keyc++;\r
6fc57144 758 for (u = 0; u <= MAX_COMBO_KEY; u++)\r
bdec53c9 759 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2\r
760 (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;\r
761 if (keyc2 > keyc) keyc = keyc2;\r
762 }\r
763 if (keyc > 1)\r
764 {\r
765 // loop again and mark those keys and actions as combo\r
6fc57144 766 for (u = 0; u <= MAX_COMBO_KEY; u++)\r
bdec53c9 767 {\r
768 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
769 kb_combo_keys |= 1 << u;\r
770 kb_combo_acts |= 1 << act;\r
771 }\r
772 }\r
773 }\r
774 }\r
775\r
776 // printf("combo keys/acts: %08x %08x\n", kb_combo_keys, kb_combo_acts);\r
777}\r
778\r
ea8c405f 779\r
780void emu_updateMovie(void)\r
781{\r
782 int offs = Pico.m.frame_count*3 + 0x40;\r
783 if (offs+3 > movie_size) {\r
784 free(movie_data);\r
785 movie_data = 0;\r
786 strcpy(noticeMsg, "END OF MOVIE.");\r
787 lprintf("END OF MOVIE.\n");\r
788 emu_noticeMsgUpdated();\r
789 } else {\r
790 // MXYZ SACB RLDU\r
791 PicoPad[0] = ~movie_data[offs] & 0x8f; // ! SCBA RLDU\r
f8af9634 792 if(!(movie_data[offs] & 0x10)) PicoPad[0] |= 0x40; // C\r
793 if(!(movie_data[offs] & 0x20)) PicoPad[0] |= 0x10; // A\r
794 if(!(movie_data[offs] & 0x40)) PicoPad[0] |= 0x20; // B\r
ea8c405f 795 PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU\r
f8af9634 796 if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // C\r
797 if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // A\r
798 if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // B\r
ea8c405f 799 PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX\r
800 if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X\r
801 if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z\r
802 PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX\r
803 if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X\r
804 if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z\r
805 }\r
806}\r
807\r
808\r
809static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r
810{\r
811 return gzread(file, p, _n);\r
812}\r
813\r
814\r
815static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r
816{\r
817 return gzwrite(file, p, _n);\r
818}\r
819\r
820static int try_ropen_file(const char *fname)\r
821{\r
822 FILE *f;\r
823\r
824 f = fopen(fname, "rb");\r
825 if (f) {\r
826 fclose(f);\r
827 return 1;\r
828 }\r
829 return 0;\r
830}\r
831\r
832char *emu_GetSaveFName(int load, int is_sram, int slot)\r
833{\r
834 static char saveFname[512];\r
835 char ext[16];\r
836\r
837 if (is_sram)\r
838 {\r
ca482e5d 839 romfname_ext(saveFname, (PicoAHW&1) ? "brm"PATH_SEP : "srm"PATH_SEP, (PicoAHW&1) ? ".brm" : ".srm");\r
ea8c405f 840 if (load) {\r
841 if (try_ropen_file(saveFname)) return saveFname;\r
842 // try in current dir..\r
602133e1 843 romfname_ext(saveFname, NULL, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");\r
ea8c405f 844 if (try_ropen_file(saveFname)) return saveFname;\r
845 return NULL; // give up\r
846 }\r
847 }\r
848 else\r
849 {\r
850 ext[0] = 0;\r
851 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
ca482e5d 852 strcat(ext, (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds");\r
ea8c405f 853\r
ca482e5d 854 romfname_ext(saveFname, "mds" PATH_SEP, ext);\r
ea8c405f 855 if (load) {\r
856 if (try_ropen_file(saveFname)) return saveFname;\r
857 romfname_ext(saveFname, NULL, ext);\r
858 if (try_ropen_file(saveFname)) return saveFname;\r
ca482e5d 859 // no gzipped states, search for non-gzipped\r
860 if (currentConfig.EmuOpt & EOPT_GZIP_SAVES)\r
861 {\r
ea8c405f 862 ext[0] = 0;\r
863 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
864 strcat(ext, ".mds");\r
865\r
ca482e5d 866 romfname_ext(saveFname, "mds"PATH_SEP, ext);\r
ea8c405f 867 if (try_ropen_file(saveFname)) return saveFname;\r
868 romfname_ext(saveFname, NULL, ext);\r
869 if (try_ropen_file(saveFname)) return saveFname;\r
870 }\r
871 return NULL;\r
872 }\r
873 }\r
874\r
875 return saveFname;\r
876}\r
877\r
878int emu_checkSaveFile(int slot)\r
879{\r
880 return emu_GetSaveFName(1, 0, slot) ? 1 : 0;\r
881}\r
882\r
883void emu_setSaveStateCbs(int gz)\r
884{\r
885 if (gz) {\r
886 areaRead = gzRead2;\r
887 areaWrite = gzWrite2;\r
888 areaEof = (areaeof *) gzeof;\r
889 areaSeek = (areaseek *) gzseek;\r
890 areaClose = (areaclose *) gzclose;\r
891 } else {\r
892 areaRead = (arearw *) fread;\r
893 areaWrite = (arearw *) fwrite;\r
894 areaEof = (areaeof *) feof;\r
895 areaSeek = (areaseek *) fseek;\r
896 areaClose = (areaclose *) fclose;\r
897 }\r
898}\r
899\r
900int emu_SaveLoadGame(int load, int sram)\r
901{\r
902 int ret = 0;\r
903 char *saveFname;\r
904\r
905 // make save filename\r
906 saveFname = emu_GetSaveFName(load, sram, state_slot);\r
907 if (saveFname == NULL) {\r
908 if (!sram) {\r
909 strcpy(noticeMsg, load ? "LOAD FAILED (missing file)" : "SAVE FAILED ");\r
910 emu_noticeMsgUpdated();\r
911 }\r
912 return -1;\r
913 }\r
914\r
915 lprintf("saveLoad (%i, %i): %s\n", load, sram, saveFname);\r
916\r
da42200b 917 if (sram)\r
918 {\r
ea8c405f 919 FILE *sramFile;\r
920 int sram_size;\r
921 unsigned char *sram_data;\r
922 int truncate = 1;\r
602133e1 923 if (PicoAHW & PAHW_MCD)\r
924 {\r
925 if (PicoOpt&POPT_EN_MCD_RAMCART) {\r
ea8c405f 926 sram_size = 0x12000;\r
927 sram_data = SRam.data;\r
928 if (sram_data)\r
929 memcpy32((int *)sram_data, (int *)Pico_mcd->bram, 0x2000/4);\r
930 } else {\r
931 sram_size = 0x2000;\r
932 sram_data = Pico_mcd->bram;\r
933 truncate = 0; // the .brm may contain RAM cart data after normal brm\r
934 }\r
935 } else {\r
936 sram_size = SRam.end-SRam.start+1;\r
937 if(Pico.m.sram_reg & 4) sram_size=0x2000;\r
938 sram_data = SRam.data;\r
939 }\r
940 if (!sram_data) return 0; // SRam forcefully disabled for this game\r
941\r
602133e1 942 if (load)\r
943 {\r
ea8c405f 944 sramFile = fopen(saveFname, "rb");\r
945 if(!sramFile) return -1;\r
946 fread(sram_data, 1, sram_size, sramFile);\r
947 fclose(sramFile);\r
602133e1 948 if ((PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_RAMCART))\r
ea8c405f 949 memcpy32((int *)Pico_mcd->bram, (int *)sram_data, 0x2000/4);\r
950 } else {\r
951 // sram save needs some special processing\r
952 // see if we have anything to save\r
953 for (; sram_size > 0; sram_size--)\r
954 if (sram_data[sram_size-1]) break;\r
955\r
956 if (sram_size) {\r
957 sramFile = fopen(saveFname, truncate ? "wb" : "r+b");\r
958 if (!sramFile) sramFile = fopen(saveFname, "wb"); // retry\r
959 if (!sramFile) return -1;\r
960 ret = fwrite(sram_data, 1, sram_size, sramFile);\r
961 ret = (ret != sram_size) ? -1 : 0;\r
962 fclose(sramFile);\r
963#ifndef NO_SYNC\r
964 sync();\r
965#endif\r
966 }\r
967 }\r
968 return ret;\r
969 }\r
970 else\r
971 {\r
972 void *PmovFile = NULL;\r
da42200b 973 if (strcmp(saveFname + strlen(saveFname) - 3, ".gz") == 0)\r
974 {\r
ea8c405f 975 if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {\r
976 emu_setSaveStateCbs(1);\r
da42200b 977 if (!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);\r
ea8c405f 978 }\r
979 }\r
980 else\r
981 {\r
982 if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {\r
983 emu_setSaveStateCbs(0);\r
984 }\r
985 }\r
986 if(PmovFile) {\r
987 ret = PmovState(load ? 6 : 5, PmovFile);\r
988 areaClose(PmovFile);\r
989 PmovFile = 0;\r
990 if (load) Pico.m.dirtyPal=1;\r
991#ifndef NO_SYNC\r
992 else sync();\r
993#endif\r
994 }\r
995 else ret = -1;\r
996 if (!ret)\r
2b1f0e25 997 strcpy(noticeMsg, load ? "GAME LOADED " : "GAME SAVED ");\r
ea8c405f 998 else\r
999 {\r
2b1f0e25 1000 strcpy(noticeMsg, load ? "LOAD FAILED " : "SAVE FAILED ");\r
ea8c405f 1001 ret = -1;\r
1002 }\r
1003\r
1004 emu_noticeMsgUpdated();\r
1005 return ret;\r
1006 }\r
1007}\r
bdec53c9 1008\r
c060a9ab 1009void emu_changeFastForward(int set_on)\r
1010{\r
1011 static void *set_PsndOut = NULL;\r
1012 static int set_Frameskip, set_EmuOpt, is_on = 0;\r
1013\r
1014 if (set_on && !is_on) {\r
1015 set_PsndOut = PsndOut;\r
1016 set_Frameskip = currentConfig.Frameskip;\r
1017 set_EmuOpt = currentConfig.EmuOpt;\r
1018 PsndOut = NULL;\r
1019 currentConfig.Frameskip = 8;\r
1020 currentConfig.EmuOpt &= ~4;\r
1021 currentConfig.EmuOpt |= 0x40000;\r
1022 is_on = 1;\r
1023 strcpy(noticeMsg, "FAST FORWARD ");\r
1024 emu_noticeMsgUpdated();\r
1025 }\r
1026 else if (!set_on && is_on) {\r
1027 PsndOut = set_PsndOut;\r
1028 currentConfig.Frameskip = set_Frameskip;\r
1029 currentConfig.EmuOpt = set_EmuOpt;\r
1030 PsndRerate(1);\r
1031 is_on = 0;\r
1032 }\r
1033}\r
1034\r
1035void emu_RunEventsPico(unsigned int events)\r
1036{\r
1037 if (events & (1 << 3)) {\r
1038 pico_inp_mode++;\r
1039 if (pico_inp_mode > 2) pico_inp_mode = 0;\r
1040 switch (pico_inp_mode) {\r
1041 case 2: strcpy(noticeMsg, "Input: Pen on Pad "); break;\r
1042 case 1: strcpy(noticeMsg, "Input: Pen on Storyware"); break;\r
1043 case 0: strcpy(noticeMsg, "Input: Joytick ");\r
1044 PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
1045 break;\r
1046 }\r
1047 emu_noticeMsgUpdated();\r
1048 }\r
1049 if (events & (1 << 4)) {\r
1050 PicoPicohw.page--;\r
1051 if (PicoPicohw.page < 0) PicoPicohw.page = 0;\r
1052 sprintf(noticeMsg, "Page %i ", PicoPicohw.page);\r
1053 emu_noticeMsgUpdated();\r
1054 }\r
1055 if (events & (1 << 5)) {\r
1056 PicoPicohw.page++;\r
1057 if (PicoPicohw.page > 6) PicoPicohw.page = 6;\r
1058 sprintf(noticeMsg, "Page %i ", PicoPicohw.page);\r
1059 emu_noticeMsgUpdated();\r
1060 }\r
1061}\r
1062\r
f0f0d2df 1063void emu_DoTurbo(int *pad, int acts)\r
1064{\r
1065 static int turbo_pad = 0;\r
1066 static unsigned char turbo_cnt[3] = { 0, 0, 0 };\r
1067 int inc = currentConfig.turbo_rate * 2;\r
1068\r
1069 if (acts & 0x1000) {\r
1070 turbo_cnt[0] += inc;\r
1071 if (turbo_cnt[0] >= 60)\r
1072 turbo_pad ^= 0x10, turbo_cnt[0] = 0;\r
1073 }\r
1074 if (acts & 0x2000) {\r
1075 turbo_cnt[1] += inc;\r
1076 if (turbo_cnt[1] >= 60)\r
1077 turbo_pad ^= 0x20, turbo_cnt[1] = 0;\r
1078 }\r
1079 if (acts & 0x4000) {\r
1080 turbo_cnt[2] += inc;\r
1081 if (turbo_cnt[2] >= 60)\r
1082 turbo_pad ^= 0x40, turbo_cnt[2] = 0;\r
1083 }\r
1084 *pad |= turbo_pad & (acts >> 8);\r
1085}\r
c060a9ab 1086\r
fast MegaDrive/MegaCD/32X emulator