fceux/boards/fk23c.cpp

128 lines
2.9 KiB
C++

/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2006 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"
#include "mmc3.h"
static uint8 unromchr;
static uint8 dipswitch;
static void BMCFK23CCW(uint32 A, uint8 V)
{
if(EXPREGS[0]&0x40)
setchr8(EXPREGS[2]|unromchr);
else
{
uint16 base=(EXPREGS[2]&0x7F)<<3;
setchr1(A,V|base);
if(EXPREGS[3]&2)
{
setchr1(0x0400,EXPREGS[6]|base);
setchr1(0x0C00,EXPREGS[7]|base);
}
}
}
static void BMCFK23CPW(uint32 A, uint8 V)
{
if(EXPREGS[0]&4)
setprg32(0x8000,EXPREGS[1]>>1);
else
{
if(EXPREGS[0]&2)
setprg8(A,(V&(0x3F>>(EXPREGS[0]&3)))|(EXPREGS[1]<<1));
else
setprg8(A,V);
if(EXPREGS[3]&2)
{
setprg8(0xC000,EXPREGS[4]);
setprg8(0xE000,EXPREGS[5]);
}
}
}
static DECLFW(BMCFK23CHiWrite)
{
if(EXPREGS[0]&0x40)
{
if(EXPREGS[0]&0x20)
unromchr=0;
else
{
unromchr=V&3;
FixMMC3CHR(MMC3_cmd);
}
}
else
{
if((A==0x8001)&&(EXPREGS[3]&2&&MMC3_cmd&8))
{
EXPREGS[4|(MMC3_cmd&3)]=V;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
else
if(A<0xC000)
MMC3_CMDWrite(A,V);
else
MMC3_IRQWrite(A,V);
}
}
static DECLFW(BMCFK23CWrite)
{
if(A&(1<<(dipswitch+4)))
{
EXPREGS[A&3]=V;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
}
static void BMCFK23CReset(void)
{
dipswitch++;
dipswitch&=3;
EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;
EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;
MMC3RegReset();
}
static void BMCFK23CPower(void)
{
EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;
EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;
GenMMC3Power();
SetWriteHandler(0x5001,0x5fff,BMCFK23CWrite);
SetWriteHandler(0x8000,0xFFFF,BMCFK23CHiWrite);
}
void BMCFK23C_Init(CartInfo *info)
{
GenMMC3_Init(info, 512, 256, 8, 0);
cwrap=BMCFK23CCW;
pwrap=BMCFK23CPW;
info->Power=BMCFK23CPower;
info->Reset=BMCFK23CReset;
AddExState(EXPREGS, 8, 0, "EXPR");
AddExState(&unromchr, 1, 0, "UNCHR");
AddExState(&dipswitch, 1, 0, "DIPSW");
}