mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
#include "mmc3.h"
|
|
|
|
// brk is a system call in *nix, and is an illegal variable name - soules
|
|
static uint8 chrcmd[8], prg0, prg1, bbrk, mirr, swap;
|
|
static SFORMAT StateRegs[]=
|
|
{
|
|
{chrcmd, 8, "CHRC"},
|
|
{&prg0, 1, "PRG0"},
|
|
{&prg1, 1, "PRG1"},
|
|
{&bbrk, 1, "BRK"},
|
|
{&mirr, 1, "MIRR"},
|
|
{&swap, 1, "SWAP"},
|
|
{0}
|
|
};
|
|
|
|
static void Sync(void)
|
|
{
|
|
int i;
|
|
setprg8(0x8000,prg0);
|
|
setprg8(0xA000,prg1);
|
|
setprg8(0xC000,~1);
|
|
setprg8(0xE000,~0);
|
|
for(i=0; i<8; i++)
|
|
setchr1(i<<10,chrcmd[i]);
|
|
setmirror(mirr^1);
|
|
}
|
|
|
|
static void UNLSL1632CW(uint32 A, uint8 V)
|
|
{
|
|
int cbase=(MMC3_cmd&0x80)<<5;
|
|
int page0=(bbrk&0x08)<<5;
|
|
int page1=(bbrk&0x20)<<3;
|
|
int page2=(bbrk&0x80)<<1;
|
|
setchr1(cbase^0x0000,page0|(DRegBuf[0]&(~1)));
|
|
setchr1(cbase^0x0400,page0|DRegBuf[0]|1);
|
|
setchr1(cbase^0x0800,page0|(DRegBuf[1]&(~1)));
|
|
setchr1(cbase^0x0C00,page0|DRegBuf[1]|1);
|
|
setchr1(cbase^0x1000,page1|DRegBuf[2]);
|
|
setchr1(cbase^0x1400,page1|DRegBuf[3]);
|
|
setchr1(cbase^0x1800,page2|DRegBuf[4]);
|
|
setchr1(cbase^0x1c00,page2|DRegBuf[5]);
|
|
}
|
|
|
|
static DECLFW(UNLSL1632CMDWrite)
|
|
{
|
|
if(A==0xA131)
|
|
{
|
|
bbrk=V;
|
|
}
|
|
if(bbrk&2)
|
|
{
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
if(A<0xC000)
|
|
MMC3_CMDWrite(A,V);
|
|
else
|
|
MMC3_IRQWrite(A,V);
|
|
}
|
|
else
|
|
{
|
|
if((A>=0xB000)&&(A<=0xE003))
|
|
{
|
|
int ind=((((A&2)|(A>>10))>>1)+2)&7;
|
|
int sar=((A&1)<<2);
|
|
chrcmd[ind]=(chrcmd[ind]&(0xF0>>sar))|((V&0x0F)<<sar);
|
|
}
|
|
else
|
|
switch(A&0xF003)
|
|
{
|
|
case 0x8000: prg0=V; break;
|
|
case 0xA000: prg1=V; break;
|
|
case 0x9000: mirr=V&1; break;
|
|
}
|
|
Sync();
|
|
}
|
|
}
|
|
|
|
static void StateRestore(int version)
|
|
{
|
|
if(bbrk&2)
|
|
{
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
}
|
|
else
|
|
Sync();
|
|
}
|
|
|
|
static void UNLSL1632Power(void)
|
|
{
|
|
GenMMC3Power();
|
|
SetWriteHandler(0x4100,0xFFFF,UNLSL1632CMDWrite);
|
|
}
|
|
|
|
void UNLSL1632_Init(CartInfo *info)
|
|
{
|
|
GenMMC3_Init(info, 256, 512, 0, 0);
|
|
cwrap=UNLSL1632CW;
|
|
info->Power=UNLSL1632Power;
|
|
GameStateRestore=StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|