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https://github.com/dborth/fceugx.git
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71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "mapinc.h"
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DECLFW(Mapper117_write)
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{
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//if(A>=0xc000)
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//printf("$%04x:$%02x, %d,%d\n",A,V,scanline,timestamp);
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switch(A)
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{
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case 0xc001:IRQLatch=V;break;
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case 0xc003:IRQCount=IRQLatch;IRQa|=2;break;
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case 0xe000:IRQa&=~1;IRQa|=V&1;X6502_IRQEnd(FCEU_IQEXT);break;
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case 0xc002:X6502_IRQEnd(FCEU_IQEXT);break;
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case 0xa000:VROM_BANK1(0x0000,V);break;
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case 0xa001:VROM_BANK1(0x0400,V);break;
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case 0xa002:VROM_BANK1(0x0800,V);break;
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case 0xa003:VROM_BANK1(0x0c00,V);break;
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case 0xa004:VROM_BANK1(0x1000,V);break;
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case 0xa005:VROM_BANK1(0x1400,V);break;
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case 0xa006:VROM_BANK1(0x1800,V);break;
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case 0xa007:VROM_BANK1(0x1c00,V);break;
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case 0x8000:ROM_BANK8(0x8000,V);break;
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case 0x8001:ROM_BANK8(0xa000,V);break;
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case 0x8002:ROM_BANK8(0xc000,V);break;
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case 0x8003:ROM_BANK8(0xe000,V);break;
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}
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}
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static void Mapper117_hb(void)
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{
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//if(scanline==0x40) X6502_IRQBegin(FCEU_IQEXT);
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//return;
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if(IRQa==3 && IRQCount)
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{
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IRQCount--;
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if(!IRQCount)
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{
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IRQa&=1;
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X6502_IRQBegin(FCEU_IQEXT);
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}
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}
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}
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void Mapper117_init(void)
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{
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GameHBIRQHook=Mapper117_hb;
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SetWriteHandler(0x8000,0xffff,Mapper117_write);
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}
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