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[libretro] added optional bootrom support (Mega Drive & Game Gear TMSS, Master System)

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This commit is contained in:
EkeEke 2015-05-07 13:45:52 +02:00
parent 8d2a466ca3
commit 9310dcf92c
3 changed files with 66 additions and 10 deletions
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BIN
builds/genesis_plus_gx_libretro.dll
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75
libretro/libretro.c
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@ -41,6 +41,7 @@ char GG_ROM[256];
char AR_ROM[256];
char SK_ROM[256];
char SK_UPMEM[256];
char MD_BIOS[256];
char GG_BIOS[256];
char MS_BIOS_EU[256];
char MS_BIOS_JP[256];
@ -154,16 +155,20 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
size = ftell(fd);
/* size limit */
if(size > maxsize)
if (size > MAXROMSIZE)
{
fclose(fd);
if (log_cb)
log_cb(RETRO_LOG_ERROR, "File is too large.\n");
return 0;
}
else if (size > maxsize)
{
size = maxsize;
}
if (log_cb)
log_cb(RETRO_LOG_INFO, "INFORMATION - Loading %d bytes ...\n", size);
log_cb(RETRO_LOG_INFO, "INFORMATION - Loading %d bytes ...\n", size);
/* filename extension */
if (extension)
@ -776,6 +781,24 @@ static void check_variables(void)
}
}
var.key = "genesis_plus_gx_bios";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
orig_value = config.bios;
if (!strcmp(var.value, "enabled"))
config.bios = 3;
else
config.bios = 0;
if (orig_value != config.bios)
{
if (system_hw)
{
reinit = true;
}
}
}
var.key = "genesis_plus_gx_force_dtack";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
@ -1311,6 +1334,7 @@ void retro_set_environment(retro_environment_t cb)
{ "genesis_plus_gx_system_hw", "System hardware; auto|sg-1000|sg-1000 II|mark-III|master system|master system II|game gear|mega drive / genesis" },
{ "genesis_plus_gx_region_detect", "System region; auto|ntsc-u|pal|ntsc-j" },
{ "genesis_plus_gx_force_dtack", "System lockups; enabled|disabled" },
{ "genesis_plus_gx_bios", "System bootrom; disabled|enabled" },
{ "genesis_plus_gx_addr_error", "68k address error; enabled|disabled" },
{ "genesis_plus_gx_lock_on", "Cartridge lock-on; disabled|game genie|action replay (pro)|sonic & knuckles" },
{ "genesis_plus_gx_ym2413", "Master System FM; auto|disabled|enabled" },
@ -1706,6 +1730,11 @@ bool retro_load_game(const struct retro_game_info *info)
snprintf(AR_ROM, sizeof(AR_ROM), "%s%careplay.bin", dir, slash);
snprintf(SK_ROM, sizeof(SK_ROM), "%s%csk.bin", dir, slash);
snprintf(SK_UPMEM, sizeof(SK_UPMEM), "%s%csk2chip.bin", dir, slash);
snprintf(MD_BIOS, sizeof(MD_BIOS), "%s%cbios_MD.bin", dir, slash);
snprintf(GG_BIOS, sizeof(GG_BIOS), "%s%cbios.gg", dir, slash);
snprintf(MS_BIOS_EU, sizeof(MS_BIOS_EU), "%s%cbios_E.sms", dir, slash);
snprintf(MS_BIOS_US, sizeof(MS_BIOS_US), "%s%cbios_U.sms", dir, slash);
snprintf(MS_BIOS_JP, sizeof(MS_BIOS_JP), "%s%cbios_J.sms", dir, slash);
snprintf(CD_BIOS_EU, sizeof(CD_BIOS_EU), "%s%cbios_CD_E.bin", dir, slash);
snprintf(CD_BIOS_US, sizeof(CD_BIOS_US), "%s%cbios_CD_U.bin", dir, slash);
snprintf(CD_BIOS_JP, sizeof(CD_BIOS_JP), "%s%cbios_CD_J.bin", dir, slash);
@ -1719,26 +1748,52 @@ bool retro_load_game(const struct retro_game_info *info)
log_cb(RETRO_LOG_INFO, "Action Replay (Pro) ROM should be located at: %s\n", AR_ROM);
log_cb(RETRO_LOG_INFO, "Sonic & Knuckles (2 MB) ROM should be located at: %s\n", SK_ROM);
log_cb(RETRO_LOG_INFO, "Sonic & Knuckles UPMEM (256 KB) ROM should be located at: %s\n", SK_UPMEM);
log_cb(RETRO_LOG_INFO, "Mega CD PAL BIOS should be located at: %s\n", CD_BIOS_EU);
log_cb(RETRO_LOG_INFO, "Sega CD NTSC-U BIOS should be located at: %s\n", CD_BIOS_US);
log_cb(RETRO_LOG_INFO, "Mega CD NTSC-J BIOS should be located at: %s\n", CD_BIOS_JP);
log_cb(RETRO_LOG_INFO, "Mega CD PAL BRAM is located at: %s\n", CD_BRAM_EU);
log_cb(RETRO_LOG_INFO, "Sega CD NTSC-U BRAM is located at: %s\n", CD_BRAM_US);
log_cb(RETRO_LOG_INFO, "Mega CD NTSC-J BRAM is located at: %s\n", CD_BRAM_JP);
log_cb(RETRO_LOG_INFO, "Mega CD RAM CART is located at: %s\n", CART_BRAM);
log_cb(RETRO_LOG_INFO, "Mega Drive TMSS BOOTROM should be located at: %s\n", MD_BIOS);
log_cb(RETRO_LOG_INFO, "Game Gear TMSS BOOTROM should be located at: %s\n", GG_BIOS);
log_cb(RETRO_LOG_INFO, "Master System (PAL) BOOTROM should be located at: %s\n", MS_BIOS_EU);
log_cb(RETRO_LOG_INFO, "Master System (NTSC-U) BOOTROM should be located at: %s\n", MS_BIOS_US);
log_cb(RETRO_LOG_INFO, "Master System (NTSC-J) BOOTROM should be located at: %s\n", MS_BIOS_JP);
log_cb(RETRO_LOG_INFO, "Mega CD (PAL) BIOS should be located at: %s\n", CD_BIOS_EU);
log_cb(RETRO_LOG_INFO, "Sega CD (NTSC-U) BIOS should be located at: %s\n", CD_BIOS_US);
log_cb(RETRO_LOG_INFO, "Mega CD (NTSC-J) BIOS should be located at: %s\n", CD_BIOS_JP);
log_cb(RETRO_LOG_INFO, "Mega CD (PAL) BRAM is located at: %s\n", CD_BRAM_EU);
log_cb(RETRO_LOG_INFO, "Sega CD (NTSC-U) BRAM is located at: %s\n", CD_BRAM_US);
log_cb(RETRO_LOG_INFO, "Mega CD (NTSC-J) BRAM is located at: %s\n", CD_BRAM_JP);
log_cb(RETRO_LOG_INFO, "Sega/Mega CD RAM CART is located at: %s\n", CART_BRAM);
}
check_variables();
if (!load_rom((char *)info->path))
return false;
if ((config.bios & 1) && !(system_bios & SYSTEM_MD))
{
memset(boot_rom, 0xFF, 0x800);
if (load_archive(MD_BIOS, boot_rom, 0x800, NULL) > 0)
{
if (!memcmp((char *)(boot_rom + 0x120),"GENESIS OS", 10))
{
system_bios |= SYSTEM_MD;
}
#ifdef LSB_FIRST
for (i=0; i<0x800; i+=2)
{
uint8 temp = boot_rom[i];
boot_rom[i] = boot_rom[i+1];
boot_rom[i+1] = temp;
}
#endif
}
}
audio_init(44100, vdp_pal ? pal_fps : ntsc_fps);
system_init();
system_reset();
is_running = false;
if (system_hw == SYSTEM_MCD)
bram_load();
bram_load();
update_viewport();

1
libretro/osd.h
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@ -76,6 +76,7 @@ extern char AR_ROM[256];
extern char SK_ROM[256];
extern char SK_UPMEM[256];
extern char GG_BIOS[256];
extern char MD_BIOS[256];
extern char CD_BIOS_EU[256];
extern char CD_BIOS_US[256];
extern char CD_BIOS_JP[256];