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synced 2024-09-10 16:53:15 +02:00
[Core/MD] added support for earlier revision of SF-001 mapper
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@ -2,7 +2,7 @@
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* Genesis Plus
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* Mega Drive cartridge hardware support
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*
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* Copyright (C) 2007-2011 Eke-Eke (Genesis Plus GX)
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* Copyright (C) 2007-2013 Eke-Eke (Genesis Plus GX)
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*
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* Most cartridge protections were initially documented by Haze
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* (http://haze.mameworld.info/)
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@ -904,8 +904,8 @@ static void mapper_sf001_w(uint32 address, uint32 data)
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zbank_memory_map[i].read = NULL;
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}
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/* 256K ROM banks #2 to #15 mapped to $040000-$3BFFFF */
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for (i=0x04; i<0x3c; i++)
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/* 256K ROM banks #2 to #15 mapped to $040000-$3BFFFF (last revision) or $040000-$3FFFFF (older revisions) */
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for (i=0x04; i<(sram.start >> 16); i++)
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{
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m68k.memory_map[i].base = cart.rom + (i << 16);
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m68k.memory_map[i].read8 = NULL;
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@ -913,8 +913,8 @@ static void mapper_sf001_w(uint32 address, uint32 data)
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zbank_memory_map[i].read = NULL;
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}
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/* 32K static RAM mirrored into $3C0000-$3FFFFF (odd bytes only) */
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for (i=0x3c; i<0x40; i++)
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/* 32K static RAM mirrored into $3C0000-$3FFFFF (odd bytes only) (last revision only) */
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while (i<0x40)
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{
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m68k.memory_map[i].base = sram.sram;
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m68k.memory_map[i].read8 = NULL;
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@ -923,11 +923,12 @@ static void mapper_sf001_w(uint32 address, uint32 data)
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m68k.memory_map[i].write16 = NULL;
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zbank_memory_map[i].read = NULL;
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zbank_memory_map[i].write = NULL;
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i++;
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}
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}
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else
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{
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/* 256K ROM banks #1 to #16 mapped to $000000-$3FFFFF */
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/* 256K ROM banks #1 to #16 mapped to $000000-$3FFFFF (default) */
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for (i=0x00; i<0x40; i++)
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{
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m68k.memory_map[i].base = cart.rom + (i << 16);
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@ -2,7 +2,7 @@
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* Genesis Plus
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* Mega Drive cartridge hardware support
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*
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* Copyright (C) 2007-2011 Eke-Eke (Genesis Plus GX)
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* Copyright (C) 2007-2013 Eke-Eke (Genesis Plus GX)
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*
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* Most cartridge protections were initially documented by Haze
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* (http://haze.mameworld.info/)
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@ -2,7 +2,7 @@
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* Genesis Plus
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* Backup RAM support
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*
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* Copyright (C) 2007-2011 Eke-Eke (Genesis Plus GX)
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* Copyright (C) 2007-2013 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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@ -122,15 +122,25 @@ void sram_init()
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{
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/* Xin Qigai Wangzi (use uncommon area) */
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sram.on = 1;
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sram.start = 0x400000;
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sram.start = 0x400001;
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sram.end = 0x40ffff;
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}
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else if ((strstr(rominfo.ROMType,"SF") != NULL) && (strstr(rominfo.product,"001") != NULL))
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{
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/* SF-001 (use bankswitching) */
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/* SF-001 */
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sram.on = 1;
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sram.start = 0x3c0001;
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sram.end = 0x3cffff;
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if (rominfo.checksum == 0x3e08)
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{
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/* last revision (use bankswitching) */
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sram.start = 0x3c0001;
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sram.end = 0x3cffff;
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}
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else
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{
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/* older revisions (use uncommon area) */
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sram.start = 0x400001;
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sram.end = 0x40ffff;
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}
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}
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else if ((strstr(rominfo.ROMType,"SF") != NULL) && (strstr(rominfo.product,"004") != NULL))
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{
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@ -147,7 +157,7 @@ void sram_init()
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/* Sonic 3 & Knuckles combined ROM */
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/* it shows S&K header but should obviously use FRAM from Sonic 3 */
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sram.on = 1;
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sram.start = 0x200000;
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sram.start = 0x200001;
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sram.end = 0x203fff;
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}
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}
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@ -2,7 +2,7 @@
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* Genesis Plus
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* Backup RAM support
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*
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* Copyright (C) 2007-2011 Eke-Eke (Genesis Plus GX)
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* Copyright (C) 2007-2013 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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