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[/] [branches/] [smsplus_adhoc/] [loadrom.c] - Rev 204

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/*
    loadrom.c --
    File loading and management.
*/
 
#include "shared.h"
 
char game_name[PATH_MAX];
 
typedef struct {
    uint32 crc;
    int mapper;
    int display;
    int territory;
    char *name;
} rominfo_t;
 
rominfo_t game_list[] = {
    {0x29822980, MAPPER_CODIES, DISPLAY_PAL, TERRITORY_EXPORT, "Cosmic Spacehead"},
    {0xB9664AE1, MAPPER_CODIES, DISPLAY_PAL, TERRITORY_EXPORT, "Fantastic Dizzy"},
    {0xA577CE46, MAPPER_CODIES, DISPLAY_PAL, TERRITORY_EXPORT, "Micro Machines"},
    {0x8813514B, MAPPER_CODIES, DISPLAY_PAL, TERRITORY_EXPORT, "Excellent Dizzy (Proto)"},
    {0xAA140C9C, MAPPER_CODIES, DISPLAY_PAL, TERRITORY_EXPORT, "Excellent Dizzy (Proto - GG)"}, 
    {-1        , -1  , NULL},
};
 
int load_rom(char *filename)
{
    int i;
    int size;
 
    if(cart.rom)
    {
        free(cart.rom);
        cart.rom = NULL;
    }
 
    if(check_zip(filename))
    {
        char name[PATH_MAX];
        cart.rom = loadFromZipByName(filename, name, &size);
        if(!cart.rom) return 0;
        strcpy(game_name, name);
    }
    else
    {
        strcpy(game_name, filename);
 
        FILE *fd = NULL;
 
        fd = fopen(filename, "rb");
        if(!fd) return 0;
 
        /* Seek to end of file, and get size */
        fseek(fd, 0, SEEK_END);
        size = ftell(fd);
        fseek(fd, 0, SEEK_SET);
 
        cart.rom = malloc(size);
        if(!cart.rom) return 0;
        fread(cart.rom, size, 1, fd);
 
        fclose(fd);
    }
 
    /* Don't load games smaller than 16K */
    if(size < 0x4000) return 0;
 
    /* Take care of image header, if present */
    if((size / 512) & 1)
    {
        size -= 512;
        memmove(cart.rom, cart.rom + 512, size);
    }
 
    cart.pages = (size / 0x4000);
    cart.crc = crc32(0L, cart.rom, size);
 
    /* Assign default settings (US NTSC machine) */
    cart.mapper     = MAPPER_SEGA;
    sms.display     = DISPLAY_NTSC;
    sms.territory   = TERRITORY_EXPORT;
 
    /* Look up mapper in game list */
    for(i = 0; game_list[i].name != NULL; i++)
    {
        if(cart.crc == game_list[i].crc)
        {
            cart.mapper     = game_list[i].mapper;
            sms.display     = game_list[i].display;
            sms.territory   = game_list[i].territory;
        }
    }
 
    /* Figure out game image type */
    if(stricmp(strrchr(game_name, '.'), ".gg") == 0)
        sms.console = CONSOLE_GG;
    else
        sms.console = CONSOLE_SMS;
 
    system_assign_device(PORT_A, DEVICE_PAD2B);
    system_assign_device(PORT_B, DEVICE_PAD2B);
 
    return 1;
}
 
 

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