#include "rockmacros.h" #include "defs.h" #include "regs.h" #include "mem.h" #include "hw.h" #include "lcd-gb.h" #include "rtc-gb.h" #include "save.h" #include "sound.h" #include "loader.h" /* From http://www.semis.demon.co.uk/Gameboy/Gbspec.txt (4/17/2007) * Cartridge type: * 0 - ROM ONLY 12 - ROM+MBC3+RAM * 1 - ROM+MBC1 13 - ROM+MBC3+RAM+BATT * 2 - ROM+MBC1+RAM 19 - ROM+MBC5 * 3 - ROM+MBC1+RAM+BATT 1A - ROM+MBC5+RAM * 5 - ROM+MBC2 1B - ROM+MBC5+RAM+BATT * 6 - ROM+MBC2+BATTERY 1C - ROM+MBC5+RUMBLE * 8 - ROM+RAM 1D - ROM+MBC5+RUMBLE+SRAM * 9 - ROM+RAM+BATTERY 1E - ROM+MBC5+RUMBLE+SRAM+BATT * B - ROM+MMM01 1F - Pocket Camera * C - ROM+MMM01+SRAM FD - Bandai TAMA5 * D - ROM+MMM01+SRAM+BATT FE - Hudson HuC-3 * F - ROM+MBC3+TIMER+BATT FF - Hudson HuC-1 * 10 - ROM+MBC3+TIMER+RAM+BATT * 11 - ROM+MBC3 */ static const int mbc_table[256] = { MBC_NONE, MBC_MBC1, MBC_MBC1, MBC_MBC1 | MBC_BAT, 0, MBC_MBC2, MBC_MBC2 | MBC_BAT, 0, 0, MBC_BAT, 0, 0, 0, MBC_BAT, 0, MBC_MBC3 | MBC_BAT | MBC_RTC, MBC_MBC3 | MBC_BAT | MBC_RTC, MBC_MBC3, MBC_MBC3, MBC_MBC3 | MBC_BAT, 0, 0, 0, 0, 0, MBC_MBC5, MBC_MBC5, MBC_MBC5 | MBC_BAT, MBC_RUMBLE, MBC_RUMBLE, MBC_RUMBLE | MBC_BAT, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, MBC_HUC3, MBC_HUC1 }; static const unsigned short romsize_table[56] = { 2, 4, 8, 16, 32, 64, 128, 256, 512, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 128, 128, 0 /* 0, 0, 0, 0, 72, 80, 96 -- actual values but bad to use these! */ }; /* Ram size should be no larger then 16 banks 1Mbit */ static const unsigned char ramsize_table[5] = { 0, 1, 1, 4, 16 }; static const char *romfile; static char sramfile[500]; static char rtcfile[500]; static char snfile[500]; static char saveprefix[500]; static int forcebatt, nobatt; static int forcedmg; static int memfill = -1, memrand = -1; static void initmem(void *mem, int size) { char *p = mem; if (memrand >= 0) { srand(memrand ? memrand : -6 ); /* time(0)); */ while(size--) *(p++) = rand(); } else if (memfill >= 0) memset(p, memfill, size); } static byte *loadfile(int fd, int *len) { byte *d; *len=lseek(fd,0,SEEK_END); d=malloc((*len)*sizeof(char)+64); if(d==0) { die("Not enough memory"); return 0; } lseek(fd,0,SEEK_SET); read(fd, d, *len); return d; } static int rom_load(void) { int fd; byte c, *data, *header; int len = 0, rlen; fd = open(romfile, O_RDONLY); if (fd<0) { die("cannot open rom file %s", romfile); return 1; } data = loadfile(fd, &len); close(fd); if(data==0) { die("Not Enough Memory"); return 1; } header = data; /* no zip. = decompress(data, &len); */ memcpy(rom.name, header+0x0134, 16); if (rom.name[14] & 0x80) rom.name[14] = 0; if (rom.name[15] & 0x80) rom.name[15] = 0; rom.name[16] = 0; c = header[0x0147]; mbc.type = mbc_table[c]&(MBC_MBC1|MBC_MBC2|MBC_MBC3|MBC_MBC5|MBC_RUMBLE|MBC_HUC1|MBC_HUC3); mbc.batt = ((mbc_table[c]&MBC_BAT) && !nobatt) || forcebatt; rtc.batt = mbc_table[c]&MBC_RTC; if(header[0x0148]<10 || (header[0x0148]>51 && header[0x0148]<55)) mbc.romsize = romsize_table[header[0x0148]]; else { die("unknown ROM size %02X\n", header[0x0148]); return 1; } if(header[0x0149]<5) mbc.ramsize = ramsize_table[header[0x0149]]; else { die("unknown SRAM size %02X\n", header[0x0149]); return 1; } rlen = 16384 * mbc.romsize; rom.bank = (void *) data; /* realloc(data, rlen); */ if (rlen > len) memset(rom.bank[0]+len, 0xff, rlen - len); /* This is the size of the ram on the cartridge * See http://www.semis.demon.co.uk/Gameboy/Gbspec.txt * for a full description. (8192*number of banks) */ ram.sbank = malloc(8192 * mbc.ramsize); if(ram.sbank==0 && mbc.ramsize!=0) { die("Not enough Memory"); return 1; } /* ram.ibank = malloc(4096*8); */ initmem(ram.sbank, 8192 * mbc.ramsize); initmem(ram.ibank, 4096 * 8); mbc.rombank = 1; mbc.rambank = 0; c = header[0x0143]; hw.cgb = ((c == 0x80) || (c == 0xc0)) && !forcedmg; return 0; } static int sram_load(void) { int fd; if (!mbc.batt || !*sramfile) return -1; /* Consider sram loaded at this point, even if file doesn't exist */ ram.loaded = 1; fd = open(sramfile, O_RDONLY); if (fd<0) return -1; read(fd,ram.sbank, 8192*mbc.ramsize); close(fd); return 0; } static int sram_save(void) { int fd; /* If we crash before we ever loaded sram, DO NOT SAVE! */ if (!mbc.batt || !ram.loaded || !mbc.ramsize) return -1; fd = open(sramfile, O_WRONLY|O_CREAT|O_TRUNC, 0666); if (fd<0) return -1; write(fd,ram.sbank, 8192*mbc.ramsize); close(fd); return 0; } static void rtc_save(void) { int fd; if (!rtc.batt) return; if ((fd = open(rtcfile, O_WRONLY|O_CREAT|O_TRUNC, 0666))<0) return; rtc_save_internal(fd); close(fd); } static void rtc_load(void) { int fd; if (!rtc.batt) return; if ((fd = open(rtcfile, O_RDONLY))<0) return; rtc_load_internal(fd); close(fd); } void sn_save(void) { int fd; if ((fd = open(snfile, O_WRONLY | O_CREAT, 0666)) < 0) return; savestate(fd); close(fd); } void sn_load(void) { int fd; if ((fd = open(snfile, O_RDONLY, 0666)) < 0) return; loadstate(fd); close(fd); } void cleanup(void) { sram_save(); rtc_save(); /* IDEA - if error, write emergency savestate..? */ } void loader_init(const char *s) { romfile = s; if(rom_load()) return; snprintf(saveprefix, 499, "%s/%s", savedir, rom.name); strcpy(sramfile, saveprefix); strcat(sramfile, ".sav"); strcpy(rtcfile, saveprefix); strcat(rtcfile, ".rtc"); strcpy(snfile, saveprefix); strcat(snfile, ".sn"); sram_load(); rtc_load(); }