81 lines
2.0 KiB
C++
81 lines
2.0 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 int is48;
|
||
|
|
|
||
|
|
static DECLFW(Mapper33_write)
|
||
|
|
{
|
||
|
|
//printf("%04x:%02x, %d\n",A,V,scanline);
|
||
|
|
|
||
|
|
A&=0xF003;
|
||
|
|
if(A>=0xA000 && A<=0xA003)
|
||
|
|
VROM_BANK1(0x1000+((A&3)<<10),V);
|
||
|
|
else switch(A)
|
||
|
|
{
|
||
|
|
case 0x8000:if(!is48) MIRROR_SET((V>>6)&1);
|
||
|
|
ROM_BANK8(0x8000,V);
|
||
|
|
break;
|
||
|
|
case 0x8001:ROM_BANK8(0xA000,V); break;
|
||
|
|
case 0x8002:VROM_BANK2(0x0000,V);break;
|
||
|
|
case 0x8003:VROM_BANK2(0x0800,V);break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static DECLFW(Mapper48_HiWrite)
|
||
|
|
{
|
||
|
|
switch(A&0xF003)
|
||
|
|
{
|
||
|
|
case 0xc000:IRQLatch=V;break;
|
||
|
|
case 0xc001:IRQCount=IRQLatch;break;
|
||
|
|
case 0xc003:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break;
|
||
|
|
case 0xc002:IRQa=1;break;
|
||
|
|
case 0xe000:MIRROR_SET((V>>6)&1);break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void heho(void)
|
||
|
|
{
|
||
|
|
if(IRQa)
|
||
|
|
{
|
||
|
|
IRQCount++;
|
||
|
|
if(IRQCount==0x100)
|
||
|
|
{
|
||
|
|
X6502_IRQBegin(FCEU_IQEXT);
|
||
|
|
IRQa=0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void Mapper33_init(void)
|
||
|
|
{
|
||
|
|
SetWriteHandler(0x8000,0xffff,Mapper33_write);
|
||
|
|
is48=0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Mapper48_init(void)
|
||
|
|
{
|
||
|
|
SetWriteHandler(0x8000,0xffff,Mapper33_write);
|
||
|
|
SetWriteHandler(0xc000,0xffff,Mapper48_HiWrite);
|
||
|
|
GameHBIRQHook=heho;
|
||
|
|
is48=1;
|
||
|
|
}
|