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[Core/MS] improved region detection (fixes BIOS support with Japanese games)

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This commit is contained in:
EkeEke 2018-06-21 00:28:57 +02:00
parent 5903e8291c
commit ae28f87402
4 changed files with 19 additions and 8 deletions
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19
core/cart_hw/sms_cart.c
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@ -2,7 +2,7 @@
* Genesis Plus
* SG-1000, Master System & Game Gear cartridge hardware support
*
* Copyright (C) 2007-2017 Eke-Eke (Genesis Plus GX)
* Copyright (C) 2007-2018 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
@ -718,10 +718,21 @@ int sms_cart_region_detect(void)
while(i--);
/* Mark-III hardware */
if (system_hw == SYSTEM_MARKIII)
if (config.system == SYSTEM_MARKIII)
{
/* Japan */
return REGION_JAPAN_NTSC;
/* Japan only */
region_code = REGION_JAPAN_NTSC;
}
/* Master System / Game Gear ROM file */
if (system_hw >= SYSTEM_SMS)
{
/* missing header or valid header with Japan region code */
if (!rominfo.country[0] || !memcmp(rominfo.country,"SMS Japan",9) || !memcmp(rominfo.country,"GG Japan",8))
{
/* assume Japan region (fixes BIOS support) */
return REGION_JAPAN_NTSC;
}
}
/* default region */

2
core/cart_hw/sms_cart.h
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@ -2,7 +2,7 @@
* Genesis Plus
* SG-1000, Master System & Game Gear cartridge hardware support
*
* Copyright (C) 2007-2017 Eke-Eke (Genesis Plus GX)
* Copyright (C) 2007-2018 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:

4
core/loadrom.c
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@ -3,7 +3,7 @@
* ROM Loading Support
*
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
* Copyright (C) 2007-2017 Eke-Eke (Genesis Plus GX)
* Copyright (C) 2007-2018 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
@ -311,7 +311,7 @@ void getrominfo(char *romheader)
}
/* if found, get infos from header */
if (offset)
if ((offset > 0) && (offset < cart.romsize))
{
/* checksum */
rominfo.checksum = romheader[offset + 0x0a] | (romheader[offset + 0x0b] << 8);

2
core/loadrom.h
View File

@ -3,7 +3,7 @@
* ROM Loading Support
*
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
* Copyright (C) 2007-2017 Eke-Eke (Genesis Plus GX)
* Copyright (C) 2007-2018 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met: