mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
75 lines
2.2 KiB
C
75 lines
2.2 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 void FP_FASTAPASS(1) FFEIRQHook(int a)
|
|
{
|
|
if(IRQa)
|
|
{
|
|
IRQCount+=a;
|
|
|
|
if(IRQCount>=0x10000)
|
|
{
|
|
X6502_IRQBegin(FCEU_IQEXT);
|
|
IRQa=0;
|
|
IRQCount=0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
DECLFW(Mapper17_write)
|
|
{
|
|
switch(A){
|
|
default:
|
|
break;
|
|
case 0x42FE:
|
|
onemir((V>>4)&1);
|
|
break;
|
|
case 0x42FF:
|
|
MIRROR_SET((V>>4)&1);
|
|
break;
|
|
case 0x4501:IRQa=V&1;X6502_IRQEnd(FCEU_IQEXT);break;
|
|
case 0x4502:IRQCount&=0xFF00;IRQCount|=V;X6502_IRQEnd(FCEU_IQEXT);break;
|
|
case 0x4503:IRQCount&=0x00FF;IRQCount|=V<<8;IRQa=1;X6502_IRQEnd(FCEU_IQEXT);break;
|
|
case 0x4504: ROM_BANK8(0x8000,V);break;
|
|
case 0x4505: ROM_BANK8(0xA000,V);break;
|
|
case 0x4506: ROM_BANK8(0xC000,V);break;
|
|
case 0x4507: ROM_BANK8(0xE000,V);break;
|
|
case 0x4510: VROM_BANK1(0x0000,V);break;
|
|
case 0x4511: VROM_BANK1(0x0400,V);break;
|
|
case 0x4512: VROM_BANK1(0x0800,V);break;
|
|
case 0x4513: VROM_BANK1(0x0C00,V);break;
|
|
case 0x4514: VROM_BANK1(0x1000,V);break;
|
|
case 0x4515: VROM_BANK1(0x1400,V);break;
|
|
case 0x4516: VROM_BANK1(0x1800,V);break;
|
|
case 0x4517: VROM_BANK1(0x1C00,V);break;
|
|
}
|
|
}
|
|
|
|
void Mapper17_init(void)
|
|
{
|
|
MapIRQHook=FFEIRQHook;
|
|
SetWriteHandler(0x4020,0x5fff,Mapper17_write);
|
|
}
|