fceugx/source/fceultra/boards/103.cpp

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2009-07-17 19:27:04 +02:00
/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2007 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 reg0, reg1, reg2;
static uint8 *WRAM=NULL;
static uint32 WRAMSIZE;
static SFORMAT StateRegs[]=
{
{&reg0, 1, "REG0"},
{&reg1, 1, "REG1"},
{&reg2, 1, "REG2"},
{0}
};
static void Sync(void)
{
setchr8(0);
setprg8(0x8000,0xc);
setprg8(0xe000,0xf);
if(reg2&0x10)
{
setprg8(0x6000,reg0);
setprg8(0xa000,0xd);
setprg8(0xc000,0xe);
}
else
{
setprg8r(0x10,0x6000,0);
setprg4(0xa000,(0xd<<1));
setprg2(0xb000,(0xd<<2)+2);
setprg2r(0x10,0xb800,4);
setprg2r(0x10,0xc000,5);
setprg2r(0x10,0xc800,6);
setprg2r(0x10,0xd000,7);
setprg2(0xd800,(0xe<<2)+3);
}
setmirror(reg1);
}
static DECLFW(M103Write0)
{
reg0=V&0xf;
Sync();
}
static DECLFW(M103Write1)
{
reg1=(V>>3)&1;
Sync();
}
static DECLFW(M103Write2)
{
reg2=V;
Sync();
}
static void M103Power(void)
{
reg0=reg1=0; reg2=0;
Sync();
SetReadHandler(0x6000,0x7FFF,CartBR);
SetWriteHandler(0x6000,0x7FFF,CartBW);
SetReadHandler(0x8000,0xFFFF,CartBR);
SetWriteHandler(0xB800,0xD7FF,CartBW);
SetWriteHandler(0x8000,0x8FFF,M103Write0);
SetWriteHandler(0xE000,0xEFFF,M103Write1);
SetWriteHandler(0xF000,0xFFFF,M103Write2);
}
static void M103Close(void)
{
if(WRAM)
FCEU_gfree(WRAM);
WRAM=NULL;
}
static void StateRestore(int version)
{
Sync();
}
void Mapper103_Init(CartInfo *info)
{
info->Power=M103Power;
info->Close=M103Close;
GameStateRestore=StateRestore;
WRAMSIZE=16384;
WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
AddExState(&StateRegs, ~0, 0, 0);
}