fceux/boards/88.cpp

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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2005 CaH4e3
*
* 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 "mapinc.h"
static uint8 reg[8];
static uint8 mirror, cmd, is154;
static SFORMAT StateRegs[]=
{
{&cmd, 1, "CMD"},
{&mirror, 1, "MIRR"},
{reg, 8, "REGS"},
{0}
};
static void Sync(void)
{
setchr2(0x0000,reg[0]>>1);
setchr2(0x0800,reg[1]>>1);
setchr1(0x1000,reg[2]|0x40);
setchr1(0x1400,reg[3]|0x40);
setchr1(0x1800,reg[4]|0x40);
setchr1(0x1C00,reg[5]|0x40);
setprg8(0x8000,reg[6]);
setprg8(0xA000,reg[7]);
}
static void MSync(void)
{
if(is154)setmirror(MI_0+(mirror&1));
}
static DECLFW(M88Write)
{
switch(A&0x8001)
{
case 0x8000: cmd=V&7; mirror=V>>6; MSync(); break;
case 0x8001: reg[cmd]=V; Sync(); break;
}
}
static void M88Power(void)
{
setprg16(0xC000,~0);
SetReadHandler(0x8000,0xFFFF,CartBR);
SetWriteHandler(0x8000,0xFFFF,M88Write);
}
static void StateRestore(int version)
{
Sync();
MSync();
}
void Mapper88_Init(CartInfo *info)
{
is154=0;
info->Power=M88Power;
GameStateRestore=StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}
void Mapper154_Init(CartInfo *info)
{
is154=1;
info->Power=M88Power;
GameStateRestore=StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}