mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
83 lines
1.9 KiB
C++
83 lines
1.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2002 Xodnizel
|
|
*
|
|
* 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 cmd;
|
|
static uint8 DRegs[8];
|
|
|
|
static SFORMAT DEI_StateRegs[]=
|
|
{
|
|
{&cmd, 1, "CMD"},
|
|
{DRegs, 8, "DREG"},
|
|
{0}
|
|
};
|
|
|
|
static void Sync(void)
|
|
{
|
|
int x;
|
|
setchr2(0x0000,DRegs[0]);
|
|
setchr2(0x0800,DRegs[1]);
|
|
for(x=0;x<4;x++)
|
|
setchr1(0x1000+(x<<10),DRegs[2+x]);
|
|
setprg8(0x8000,DRegs[6]);
|
|
setprg8(0xa000,DRegs[7]);
|
|
}
|
|
|
|
static void StateRestore(int version)
|
|
{
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(DEIWrite)
|
|
{
|
|
switch(A&0x8001)
|
|
{
|
|
case 0x8000: cmd=V&0x07; break;
|
|
case 0x8001: if(cmd<=0x05)
|
|
V&=0x3F;
|
|
else
|
|
V&=0x0F;
|
|
if(cmd<=0x01) V>>=1;
|
|
DRegs[cmd&0x07]=V;
|
|
Sync();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void DEIPower(void)
|
|
{
|
|
setprg8(0xc000,0xE);
|
|
setprg8(0xe000,0xF);
|
|
cmd=0;
|
|
memset(DRegs,0,8);
|
|
Sync();
|
|
SetReadHandler(0x8000,0xFFFF,CartBR);
|
|
SetWriteHandler(0x8000,0xFFFF,DEIWrite);
|
|
}
|
|
|
|
|
|
void DEIROM_Init(CartInfo *info)
|
|
{
|
|
info->Power=DEIPower;
|
|
GameStateRestore=StateRestore;
|
|
AddExState(&DEI_StateRegs, ~0, 0, 0);
|
|
}
|