mirror of
https://github.com/dborth/fceugx.git
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95 lines
2.4 KiB
C++
95 lines
2.4 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) 2007 CaH4e3
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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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static uint8 reg[8], cmd, IRQa;
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static int32 IRQCount;
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static SFORMAT StateRegs[]=
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{
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{&cmd, 1, "CMD"},
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{reg, 8, "REGS"},
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{&IRQa, 1, "IRQA"},
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{&IRQCount, 4, "IRQC"},
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{0}
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};
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static void Sync(void)
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{
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setprg8(0x6000,reg[4]);
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setprg8(0x8000,reg[1]);
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setprg8(0xA000,reg[2]);
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setprg8(0xC000,reg[3]);
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setprg8(0xE000,~0);
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setchr8(0);
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}
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static DECLFW(UNLKS7032Write)
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{
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// FCEU_printf("bs %04x %02x\n",A,V);
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switch(A)
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{
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// case 0x8FFF: reg[4]=V; Sync(); break;
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case 0x8000: X6502_IRQEnd(FCEU_IQEXT); IRQCount=(IRQCount&0x000F)|(V&0x0F); break;
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case 0x9000: X6502_IRQEnd(FCEU_IQEXT); IRQCount=(IRQCount&0x00F0)|((V&0x0F)<<4); break;
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case 0xA000: X6502_IRQEnd(FCEU_IQEXT); IRQCount=(IRQCount&0x0F00)|((V&0x0F)<<8); break;
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case 0xB000: X6502_IRQEnd(FCEU_IQEXT); IRQCount=(IRQCount&0xF000)|(V<<12); break;
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case 0xC000: X6502_IRQEnd(FCEU_IQEXT); IRQa=1; break;
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case 0xE000: cmd=V&7; break;
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case 0xF000: reg[cmd]=V; Sync(); break;
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}
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}
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static void UNLSMB2JIRQHook(int a)
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{
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if(IRQa)
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{
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IRQCount+=a;
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if(IRQCount>=0xFFFF)
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{
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IRQa=0;
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IRQCount=0;
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X6502_IRQBegin(FCEU_IQEXT);
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}
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}
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}
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static void UNLKS7032Power(void)
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{
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Sync();
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SetReadHandler(0x6000,0x7FFF,CartBR);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x4020,0xFFFF,UNLKS7032Write);
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}
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static void StateRestore(int version)
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{
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Sync();
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}
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void UNLKS7032_Init(CartInfo *info)
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{
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info->Power=UNLKS7032Power;
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MapIRQHook=UNLSMB2JIRQHook;
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GameStateRestore=StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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