fceux/boards/01-222.cpp

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/* 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"
static uint8 reg[4];
static SFORMAT StateRegs[]=
{
{reg, 4, "REGS"},
{0}
};
static void Sync(void)
{
setprg32(0x8000,(reg[2]>>2)&1);
setchr8(reg[2]&3);
}
static DECLFW(UNL22211WriteLo)
{
// FCEU_printf("bs %04x %02x\n",A,V);
reg[A&3]=V;
}
static DECLFW(UNL22211WriteHi)
{
// FCEU_printf("bs %04x %02x\n",A,V);
Sync();
}
static DECLFR(UNL22211ReadLo)
{
if(reg[3])
return reg[2];
else
return X.DB;
}
static void UNL22211Power(void)
{
Sync();
SetReadHandler(0x8000,0xFFFF,CartBR);
SetReadHandler(0x4100,0x4100,UNL22211ReadLo);
SetWriteHandler(0x4100,0x4103,UNL22211WriteLo);
SetWriteHandler(0x8000,0xFFFF,UNL22211WriteHi);
}
static void StateRestore(int version)
{
Sync();
}
void UNL22211_Init(CartInfo *info)
{
info->Power=UNL22211Power;
GameStateRestore=StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}