fceux/boards/164.cpp

118 lines
2.4 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 StateRegs[]=
{
{&cmd, 1, "CMD"},
{DRegs, 8, "DREG"},
{0}
};
static void Sync(void)
{
setprg32(0x8000,(DRegs[0]<<4)|(DRegs[1]&0xF));
setchr8(0);
}
static void StateRestore(int version)
{
Sync();
}
static DECLFW(Write)
{
switch (A&0x7300)
{
case 0x5100: DRegs[0]=V; Sync(); break;
case 0x5000: DRegs[1]=V; Sync(); break;
}
}
static DECLFW(Write2)
{
// FCEU_printf("bs %04x %02x\n",A,V);
switch (A&0x7300)
{
case 0x5200: DRegs[0]=V; Sync(); break;
case 0x5000: DRegs[1]=V; Sync(); break;
}
}
static uint8 WRAM[8192];
static DECLFR(AWRAM)
{
return(WRAM[A-0x6000]);
}
static DECLFW(BWRAM)
{
WRAM[A-0x6000]=V;
}
static void Power(void)
{
memset(DRegs,0,8);
DRegs[1]=0xFF;
cmd=0;
SetReadHandler(0x8000,0xFFFF,CartBR);
SetWriteHandler(0x4020,0xFFFF,Write);
SetReadHandler(0x6000,0x7FFF,AWRAM);
SetWriteHandler(0x6000,0x7FFF,BWRAM);
Sync();
}
static void M163HB(void)
{
if(scanline==127&&DRegs[1]&0x80)
setchr4(0x0000,1);
}
static void Power2(void)
{
memset(DRegs,0,8);
DRegs[1]=0xFF;
cmd=0;
SetReadHandler(0x8000,0xFFFF,CartBR);
SetWriteHandler(0x4020,0xFFFF,Write2);
SetReadHandler(0x6000,0x7FFF,AWRAM);
SetWriteHandler(0x6000,0x7FFF,BWRAM);
Sync();
}
void Mapper164_Init(CartInfo *info)
{
info->Power=Power;
GameStateRestore=StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}
void Mapper163_Init(CartInfo *info)
{
info->Power=Power2;
GameHBIRQHook=M163HB;
GameStateRestore=StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}