mirror of
https://github.com/dborth/fceugx.git
synced 2024-12-27 09:01:56 +01:00
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2003 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 void Sync(void)
|
|
{
|
|
int x;
|
|
|
|
setmirror(((mapbyte1[0]>>6)&1)^1);
|
|
switch(mapbyte1[1]&0x3)
|
|
{
|
|
case 0x0:
|
|
for(x=0;x<4;x++)
|
|
setprg8(0x8000+x*8192,(((mapbyte1[0]&0x7F)<<1)+x)^(mapbyte1[0]>>7));
|
|
break;
|
|
case 0x2:
|
|
for(x=0;x<4;x++)
|
|
setprg8(0x8000+x*8192,((mapbyte1[0]&0x7F)<<1)+(mapbyte1[0]>>7));
|
|
break;
|
|
case 0x1:
|
|
case 0x3:
|
|
for(x=0;x<4;x++)
|
|
{
|
|
unsigned int b;
|
|
|
|
b=mapbyte1[0]&0x7F;
|
|
if(x>=2 && !(mapbyte1[1]&0x2))
|
|
b=0x7F;
|
|
setprg8(0x8000+x*8192,(x&1)+((b<<1)^(mapbyte1[0]>>7)));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static DECLFW(Mapper15_write)
|
|
{
|
|
mapbyte1[0]=V;
|
|
mapbyte1[1]=A&3;
|
|
Sync();
|
|
}
|
|
|
|
static void StateRestore(int version)
|
|
{
|
|
Sync();
|
|
}
|
|
|
|
void Mapper15_init(void)
|
|
{
|
|
mapbyte1[0]=mapbyte1[1]=0;
|
|
Sync();
|
|
GameStateRestore=StateRestore;
|
|
SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
|
|
}
|
|
|