mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
106 lines
2.1 KiB
C
106 lines
2.1 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"
|
|
|
|
#define rg mapbyte1
|
|
static void DoPRG(void)
|
|
{
|
|
int32 b=((rg[0]>>1)&0xF) | ((rg[0]>>3)&0x10) | ((rg[1]&1)<<5);
|
|
if(rg[0]&0x20) // 16 KB
|
|
{
|
|
ROM_BANK16(0x8000,(b<<1)|(rg[0]&1));
|
|
ROM_BANK16(0xC000,(b<<1)|(rg[0]&1));
|
|
}
|
|
else
|
|
ROM_BANK32(b);
|
|
}
|
|
|
|
static DECLFW(Mapper226_write)
|
|
{
|
|
rg[A&1]=V;
|
|
DoPRG();
|
|
if(A&1)
|
|
{
|
|
if(rg[1]&2)
|
|
PPUCHRRAM=0; // Write protected.
|
|
else
|
|
PPUCHRRAM=0xFF; // Not write protected.
|
|
}
|
|
else
|
|
MIRROR_SET2((rg[0]>>6)&1);
|
|
}
|
|
|
|
static void M26Reset(void)
|
|
{
|
|
rg[0]=rg[1]=0;
|
|
DoPRG();
|
|
PPUCHRRAM=0xFF;
|
|
MIRROR_SET2(0);
|
|
}
|
|
|
|
static void M26Restore(int version)
|
|
{
|
|
DoPRG();
|
|
if(rg[1]&2)
|
|
PPUCHRRAM=0; // Write protected.
|
|
else
|
|
PPUCHRRAM=0xFF; // Not write protected.
|
|
MIRROR_SET2((rg[0]>>6)&1);
|
|
}
|
|
|
|
void Mapper226_init(void)
|
|
{
|
|
SetWriteHandler(0x8000,0xffff,Mapper226_write);
|
|
MapperReset=M26Reset;
|
|
GameStateRestore=M26Restore;
|
|
M26Reset();
|
|
}
|
|
|
|
#ifdef OLD // What the heck is this??
|
|
DECLFW(Mapper226_write)
|
|
{
|
|
MIRROR_SET((A>>13)&1);
|
|
VROM_BANK8(A&0x7F);
|
|
if(A&0x1000)
|
|
{
|
|
if(A&0x40)
|
|
{
|
|
ROM_BANK16(0x8000,(((A>>7))<<1)+1);
|
|
ROM_BANK16(0xC000,(((A>>7))<<1)+1);
|
|
}
|
|
else
|
|
{
|
|
ROM_BANK16(0x8000,(((A>>7))<<1));
|
|
ROM_BANK16(0xC000,(((A>>7))<<1));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ROM_BANK32(A>>7);
|
|
}
|
|
}
|
|
|
|
void Mapper226_init(void)
|
|
{
|
|
SetWriteHandler(0x8000,0xffff,Mapper226_write);
|
|
}
|
|
#endif
|