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651e91ece6
Genesis-Plus-GX/source/cart_hw/sms_cart.c
ekeeke31 651e91ece6 Reverted to r598
2011-07-13 22:49:52 +00:00

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/****************************************************************************
* Genesis Plus
* Master System cartridge hardware support
*
*
* Copyright (C) 1998-2007 Charles MacDonald (SMS Plus original code)
* Eke-Eke (2007-2011), additional code & fixes for the GCN/Wii port
*
* Most cartridge protections documented by Haze
* (http://haze.mameworld.info/)
*
* Realtec mapper documented by TascoDeluxe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***************************************************************************/
#include "shared.h"
#define MAPPER_NONE (0)
#define MAPPER_SEGA (1)
#define MAPPER_CODIES (2)
#define MAPPER_KOREA (3)
#define MAPPER_MSX (4)
#define GAME_DATABASE_CNT (75)
typedef struct
{
uint32 crc;
uint8 glasses_3d;
uint8 peripheral;
uint8 mapper;
uint8 region;
} rominfo_t;
static struct
{
uint8 fcr[4];
uint8 mapper;
} slot;
/* SMS game database */
static const rominfo_t game_list[GAME_DATABASE_CNT] =
{
/* games requiring CODEMASTER mapper (NOTE: extended video modes don't work on Genesis VDP !) */
{0x29822980, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Cosmic Spacehead */
{0xA577CE46, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Micro Machines */
{0xF7C524F6, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Micro Machines [BAD DUMP] */
{0xDBE8895C, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Micro Machines 2 - Turbo Tournament */
{0xC1756BEE, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Pete Sampras Tennis */
{0x8813514B, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_EUROPE}, /* Excellent Dizzy Collection, The [Proto] */
{0xEA5C3A6F, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Dinobasher - Starring Bignose the Caveman [Proto] */
{0x152F0DCC, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Drop Zone" */
{0xAA140C9C, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Excellent Dizzy Collection, The [SMS-GG] */
{0xB9664AE1, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Fantastic Dizzy */
{0xC888222B, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Fantastic Dizzy [SMS-GG] */
{0x76C5BDFB, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Jang Pung 2 [SMS-GG] */
{0xD9A7F170, 0, SYSTEM_MS_GAMEPAD, MAPPER_CODIES, REGION_USA}, /* Man Overboard! */
/* games requiring KOREA mappers (NOTE: TMS9918 video modes don't work on Genesis VDP !) */
{0x17AB6883, 0, SYSTEM_MS_GAMEPAD, MAPPER_NONE, REGION_JAPAN_NTSC}, /* FA Tetris (KR) */
{0x61E8806F, 0, SYSTEM_MS_GAMEPAD, MAPPER_NONE, REGION_JAPAN_NTSC}, /* Flash Point (KR) */
{0x445525E2, 0, SYSTEM_MS_GAMEPAD, MAPPER_MSX, REGION_JAPAN_NTSC}, /* Penguin Adventure (KR) */
{0x83F0EEDE, 0, SYSTEM_MS_GAMEPAD, MAPPER_MSX, REGION_JAPAN_NTSC}, /* Street Master (KR) */
{0xA05258F5, 0, SYSTEM_MS_GAMEPAD, MAPPER_MSX, REGION_JAPAN_NTSC}, /* Won-Si-In (KR) */
{0x06965ED9, 0, SYSTEM_MS_GAMEPAD, MAPPER_MSX, REGION_JAPAN_NTSC}, /* F-1 Spirit - The way to Formula-1 (KR) */
{0x89B79E77, 0, SYSTEM_MS_GAMEPAD, MAPPER_KOREA, REGION_JAPAN_NTSC}, /* Dodgeball King (KR) */
{0x18FB98A3, 0, SYSTEM_MS_GAMEPAD, MAPPER_KOREA, REGION_JAPAN_NTSC}, /* Jang Pung 3 (KR) */
{0x97D03541, 0, SYSTEM_MS_GAMEPAD, MAPPER_KOREA, REGION_JAPAN_NTSC}, /* Sangokushi 3 (KR)"} */
{0x67C2F0FF, 0, SYSTEM_MS_GAMEPAD, MAPPER_KOREA, REGION_JAPAN_NTSC}, /* Super Boy 2 (KR) */
/* games requiring PAL timings */
{0x72420F38, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Addams Familly */
{0x2D48C1D3, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Back to the Future Part III */
{0x1CBB7BF1, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Battlemaniacs (BR) */
{0x1B10A951, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Bram Stoker's Dracula */
{0xC0E25D62, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* California Games II */
{0x45C50294, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Jogos de Verao II (BR) */
{0xC9DBF936, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Home Alone */
{0x0047B615, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Predator2 */
{0xF42E145C, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Quest for the Shaven Yak Starring Ren Hoek & Stimpy (BR) */
{0x9F951756, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* RoboCop 3 */
{0xF8176918, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Sensible Soccer */
{0x1575581D, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Shadow of the Beast */
{0x96B3F29E, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Sonic Blast (BR) */
{0x5B3B922C, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Sonic the Hedgehog 2 [V0] */
{0xD6F2BFCA, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Sonic the Hedgehog 2 [V1] */
{0xCA1D3752, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Space Harrier [50 Hz] */
{0x85CFC9C9, 0, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_EUROPE}, /* Taito Chase H.Q. */
/* games requiring 3-D Glasses */
{0x871562b0, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Maze Walker */
{0x156948f9, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Space Harrier 3-D (J) */
{0x6BD5C2BF, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Space Harrier 3-D */
{0x8ECD201C, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Blade Eagle 3-D */
{0xFBF96C81, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Blade Eagle 3-D (BR) */
{0x58D5FC48, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Blade Eagle 3-D [Proto] */
{0x31B8040B, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Maze Hunter 3-D */
{0xABD48AD2, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Poseidon Wars 3-D */
{0xA3EF13CB, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Zaxxon 3-D */
{0xBBA74147, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Zaxxon 3-D [Proto] */
{0xD6F43DDA, 1, SYSTEM_MS_GAMEPAD, MAPPER_SEGA, REGION_USA}, /* Out Run 3-D */
/* games requiring 3-D Glasses & Sega Light Phaser */
{0xFBE5CFBB, 1, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Missile Defense 3D */
{0xE79BB689, 1, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Missile Defense 3D [BIOS] */
/* games requiring Sega Light Phaser */
{0x861B6E79, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Assault City [Light Phaser] */
{0x5FC74D2A, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Gangster Town */
{0xE167A561, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Hang-On / Safari Hunt */
{0xC5083000, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Hang-On / Safari Hunt [BAD DUMP] */
{0x91E93385, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Hang-On / Safari Hunt [BIOS] */
{0xE8EA842C, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Marksman Shooting / Trap Shooting */
{0xE8215C2E, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Marksman Shooting / Trap Shooting / Safari Hunt */
{0x205CAAE8, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Operation Wolf (can be played with gamepad in port B)*/
{0x23283F37, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Operation Wolf [A] (can be played with gamepad in port B) */
{0xDA5A7013, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Rambo 3 */
{0x79AC8E7F, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Rescue Mission */
{0x4B051022, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Shooting Gallery */
{0xA908CFF5, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Spacegun */
{0x5359762D, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Wanted */
{0x0CA95637, 0, SYSTEM_LIGHTPHASER, MAPPER_SEGA, REGION_USA}, /* Laser Ghost */
/* games requiring Sega Paddle */
{0xF9DBB533, 0, SYSTEM_PADDLE, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Alex Kidd BMX Trial */
{0xA6FA42D0, 0, SYSTEM_PADDLE, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Galactic Protector */
{0x29BC7FAD, 0, SYSTEM_PADDLE, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Megumi Rescue */
{0x315917D4, 0, SYSTEM_PADDLE, MAPPER_SEGA, REGION_JAPAN_NTSC}, /* Woody Pop */
/* games requiring Sega Sport Pad */
{0x0CB7E21F, 0, SYSTEM_SPORTSPAD, MAPPER_SEGA, REGION_USA}, /* Great Ice Hockey */
{0xE42E4998, 0, SYSTEM_SPORTSPAD, MAPPER_SEGA, REGION_USA}, /* Sports Pad Football */
{0x41C948BF, 0, SYSTEM_SPORTSPAD, MAPPER_SEGA, REGION_USA} /* Sports Pad Soccer */
};
/* 1K trash buffer */
static uint8 dummy[0x400];
/* Function prorotypes */
static void mapper_8k_w(int offset, unsigned int data);
static void mapper_16k_w(int offset, unsigned int data);
static void write_mapper_none(unsigned int address, unsigned char data);
static void write_mapper_sega(unsigned int address, unsigned char data);
static void write_mapper_codies(unsigned int address, unsigned char data);
static void write_mapper_korea(unsigned int address, unsigned char data);
static void write_mapper_msx(unsigned int address, unsigned char data);
void sms_cart_init(void)
{
/* default mapper */
slot.mapper = MAPPER_SEGA;
/* default supported peripheral */
uint8 device = SYSTEM_MS_GAMEPAD;
cart.special = 0;
/* compute CRC */
uint32 crc = crc32(0, cart.rom, cart.romsize);
/* detect cartridge mapper */
int i;
for (i=0; i<GAME_DATABASE_CNT; i++)
{
if (crc == game_list[i].crc)
{
cart.special = game_list[i].glasses_3d;
slot.mapper = game_list[i].mapper;
device = game_list[i].peripheral;
i = GAME_DATABASE_CNT;
}
}
/* initialize Z80 write handler */
switch(slot.mapper)
{
case MAPPER_NONE:
z80_writemem = write_mapper_none;
break;
case MAPPER_CODIES:
z80_writemem = write_mapper_codies;
break;
case MAPPER_KOREA:
z80_writemem = write_mapper_korea;
break;
case MAPPER_MSX:
z80_writemem = write_mapper_msx;
break;
default:
z80_writemem = write_mapper_sega;
break;
}
/* initialize default SRAM (32K max.) */
sram_init();
/* restore previous input settings */
if (old_system[0] != -1)
{
input.system[0] = old_system[0];
}
if (old_system[1] != -1)
{
input.system[1] = old_system[1];
}
/* default gun offset */
input.x_offset = 20;
input.y_offset = 0;
/* detect if game requires specific peripheral */
if (device != SYSTEM_MS_GAMEPAD)
{
/* save port A setting */
if (old_system[0] == -1)
{
old_system[0] = input.system[0];
}
/* force port A configuration */
input.system[0] = device;
/* SpaceGun & Gangster Town use different gun offset */
if ((crc == 0x5359762D) || (crc == 0x5FC74D2A))
{
input.x_offset = 16;
}
}
}
void sms_cart_reset(void)
{
int i;
/* Unmapped memory return $FF */
memset(dummy, 0xFF, 0x400);
/* Reset Z80 memory mapping at $0000-$BFFF (first 32k of ROM mirrored) */
for(i = 0x00; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(i & 0x1F) << 10];
z80_writemap[i] = dummy;
}
/* Reset Z80 memory mapping at $C000-$FFFF (first 8K of 68k RAM mirrored) */
for(i = 0x30; i < 0x40; i++)
{
z80_readmap[i] = z80_writemap[i] = &work_ram[(i & 0x07) << 10];
}
/* Reset cartridge paging registers */
switch(slot.mapper)
{
case MAPPER_NONE:
case MAPPER_SEGA:
{
slot.fcr[0] = 0;
slot.fcr[1] = 0;
slot.fcr[2] = 1;
slot.fcr[3] = 2;
break;
}
default:
{
slot.fcr[0] = 0;
slot.fcr[1] = 0;
slot.fcr[2] = 1;
slot.fcr[3] = 0;
break;
}
}
/* Set default memory map */
if (slot.mapper != MAPPER_MSX)
{
mapper_16k_w(0,slot.fcr[0]);
mapper_16k_w(1,slot.fcr[1]);
mapper_16k_w(2,slot.fcr[2]);
mapper_16k_w(3,slot.fcr[3]);
}
else
{
mapper_8k_w(0,slot.fcr[0]);
mapper_8k_w(1,slot.fcr[1]);
mapper_8k_w(2,slot.fcr[2]);
mapper_8k_w(3,slot.fcr[3]);
}
}
void sms_cart_switch(int enabled)
{
int i;
if (enabled)
{
/* Enable cartdige ROM at $0000-$BFFF */
for(i = 0x00; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(i & 0x1F) << 10];
z80_writemap[i] = dummy;
}
}
else
{
/* Disable cartridge ROM at $0000-$BFFF */
for(i = 0x00; i < 0x30; i++)
{
z80_readmap[i] = z80_writemap[i] = dummy;
}
}
}
int sms_cart_region_detect(void)
{
/* compute CRC */
uint32 crc = crc32(0, cart.rom, cart.romsize);
/* detect game region */
int i;
for (i=0; i<GAME_DATABASE_CNT; i++)
{
if (crc == game_list[i].crc)
{
return game_list[i].region;
}
}
/* default region */
return REGION_USA;
}
int sms_cart_context_save(uint8 *state)
{
int bufferptr = 0;
save_param(slot.fcr, sizeof(slot.fcr));
return bufferptr;
}
int sms_cart_context_load(uint8 *state)
{
int bufferptr = 0;
load_param(slot.fcr, sizeof(slot.fcr));
/* Set default memory map */
if (slot.mapper != MAPPER_MSX)
{
mapper_16k_w(0,slot.fcr[0]);
mapper_16k_w(1,slot.fcr[1]);
mapper_16k_w(2,slot.fcr[2]);
mapper_16k_w(3,slot.fcr[3]);
}
else
{
mapper_8k_w(0,slot.fcr[0]);
mapper_8k_w(1,slot.fcr[1]);
mapper_8k_w(2,slot.fcr[2]);
mapper_8k_w(3,slot.fcr[3]);
}
return bufferptr;
}
void mapper_8k_w(int offset, unsigned int data)
{
int i;
/* cartridge ROM page (8k) */
uint8 page = data % (cart.romsize >> 13);
/* Save frame control register data */
slot.fcr[offset] = data;
/* 4 x 8k banks */
switch (offset & 3)
{
case 0: /* cartridge ROM bank (8k) at $8000-$9FFF */
{
for(i = 0x20; i < 0x28; i++)
{
z80_readmap[i] = &cart.rom[(page << 13) | ((i & 0x07) << 10)];
}
break;
}
case 1: /* cartridge ROM bank (8k) at $A000-$BFFF */
{
for(i = 0x28; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(page << 13) | ((i & 0x07) << 10)];
}
break;
}
case 2: /* cartridge ROM bank (8k) at $4000-$5FFF */
{
for(i = 0x10; i < 0x18; i++)
{
z80_readmap[i] = &cart.rom[(page << 13) | ((i & 0x07) << 10)];
}
break;
}
case 3: /* cartridge ROM bank (8k) at $6000-$7FFF */
{
for(i = 0x18; i < 0x20; i++)
{
z80_readmap[i] = &cart.rom[(page << 13) | ((i & 0x07) << 10)];
}
break;
}
}
}
void mapper_16k_w(int offset, unsigned int data)
{
int i;
/* cartridge ROM page (16k) */
uint8 page = data % (cart.romsize >> 14);
/* page index increment (SEGA mapper) */
if (slot.fcr[0] & 0x03)
{
page = (page + ((4 - (slot.fcr[0] & 0x03)) << 3)) % (cart.romsize >> 14);
}
/* save frame control register data */
slot.fcr[offset] = data;
switch (offset)
{
case 0: /* control register (SEGA mapper) */
{
if(data & 0x08)
{
/* external RAM (upper or lower 16K) mapped at $8000-$BFFF */
for(i = 0x20; i <= 0x2F; i++)
{
z80_readmap[i] = z80_writemap[i] = &sram.sram[((data & 0x04) << 12) + ((i & 0x0F) << 10)];
}
}
else
{
/* cartridge ROM page (16k) */
page = slot.fcr[3] % (cart.romsize >> 14);
/* page index increment (SEGA mapper) */
if (data & 0x03)
{
page = (page + ((4 - (data & 0x03)) << 3)) % (cart.romsize >> 14);
}
/* cartridge ROM mapped at $8000-$BFFF */
for(i = 0x20; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
z80_writemap[i] = dummy;
}
}
if(data & 0x10)
{
/* external RAM (lower 16K) mapped at $C000-$FFFF */
for(i = 0x30; i < 0x40; i++)
{
z80_readmap[i] = z80_writemap[i] = &sram.sram[(i & 0x0F) << 10];
}
}
else
{
/* internal RAM (8K mirrorred) mapped at $C000-$FFFF */
for(i = 0x30; i < 0x40; i++)
{
z80_readmap[i] = z80_writemap[i] = &work_ram[(i & 0x07) << 10];
}
}
break;
}
case 1: /* cartridge ROM bank (16k) at $0000-$3FFF */
{
/* first 1k is not fixed (CODEMASTER mapper) */
if (slot.mapper == MAPPER_CODIES)
{
z80_readmap[0] = &cart.rom[(page << 14)];
}
for(i = 0x01; i < 0x10; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
}
break;
}
case 2: /* cartridge ROM bank (16k) at $4000-$7FFF */
{
for(i = 0x10; i < 0x20; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
}
/* Ernie Elf's Golf external RAM switch */
if (slot.mapper == MAPPER_CODIES)
{
if (data & 0x80)
{
/* external RAM (8k) mapped at $A000-$BFFF */
for(i = 0x28; i < 0x30; i++)
{
z80_readmap[i] = z80_writemap[i] = &sram.sram[(i & 0x0F) << 10];
}
}
else
{
/* cartridge ROM page (16k) */
page = slot.fcr[3] % (cart.romsize >> 14);
/* cartridge ROM mapped at $A000-$BFFF */
for(i = 0x28; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
z80_writemap[i] = dummy;
}
}
}
break;
}
case 3: /* cartridge ROM bank (16k) at $8000-$BFFF */
{
/* check that external RAM (16k) is not mapped at $8000-$BFFF (SEGA mapper) */
if ((slot.fcr[0] & 0x08)) break;
/* first 8k */
for(i = 0x20; i < 0x28; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
}
/* check that external RAM (8k) is not mapped at $A000-$BFFF (CODEMASTER mapper) */
if ((slot.mapper == MAPPER_CODIES) && (slot.fcr[2] & 0x80)) break;
/* last 8k */
for(i = 0x28; i < 0x30; i++)
{
z80_readmap[i] = &cart.rom[(page << 14) | ((i & 0x0F) << 10)];
}
break;
}
}
}
static void write_mapper_none(unsigned int address, unsigned char data)
{
z80_writemap[address >> 10][address & 0x03FF] = data;
}
static void write_mapper_sega(unsigned int address, unsigned char data)
{
if(address >= 0xFFFC)
{
mapper_16k_w(address & 3, data);
}
z80_writemap[address >> 10][address & 0x03FF] = data;
}
static void write_mapper_codies(unsigned int address, unsigned char data)
{
if (address == 0x0000)
{
mapper_16k_w(1,data);
return;
}
if (address == 0x4000)
{
mapper_16k_w(2,data);
return;
}
if (address == 0x8000)
{
mapper_16k_w(3,data);
return;
}
z80_writemap[address >> 10][address & 0x03FF] = data;
}
static void write_mapper_korea(unsigned int address, unsigned char data)
{
if (address == 0xA000)
{
mapper_16k_w(3,data);
return;
}
z80_writemap[address >> 10][address & 0x03FF] = data;
}
static void write_mapper_msx(unsigned int address, unsigned char data)
{
if (address <= 0x0003)
{
mapper_8k_w(address,data);
return;
}
z80_writemap[address >> 10][address & 0x03FF] = data;
}
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