mirror of
https://github.com/dborth/fceugx.git
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114 lines
2.3 KiB
C
114 lines
2.3 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) 2003 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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/* Not finished. Darn evil game... *Mumble*... */
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#include "mapinc.h"
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static uint8 cmd;
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static uint8 regs[8];
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static void DoPRG(void)
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{
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if(cmd&0x40)
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{
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setprg8(0xC000,regs[4]);
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setprg8(0xA000,regs[5]);
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setprg8(0x8000,~1);
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setprg8(0xE000,~0);
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}
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else
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{
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setprg8(0x8000,regs[4]);
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setprg8(0xA000,regs[5]);
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setprg8(0xC000,~1);
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setprg8(0xE000,~0);
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}
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}
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static void DoCHR(void)
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{
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uint32 base=(cmd&0x80)<<5;
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setchr2(0x0000^base,regs[0]);
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setchr2(0x0800^base,regs[2]);
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setchr1(0x1000^base,regs[6]);
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setchr1(0x1400^base,regs[1]);
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setchr1(0x1800^base,regs[7]);
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setchr1(0x1c00^base,regs[3]);
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}
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static DECLFW(PWrite)
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{
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//printf("$%04x:$%02x\n",A,V);
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}
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static DECLFW(H2288Write)
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{
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//printf("$%04x:$%02x, $%04x\n",A,V,X.PC);
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//FCEUI_DumpMem("dmp",0xc000,0xffff);
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switch(A&0xE001)
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{
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case 0xa000:setmirror((V&1)^1);break;
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case 0x8000:
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cmd=V;DoPRG();DoCHR();break;
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case 0x8001:regs[cmd&7]=V;
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if((cmd&7)==4 || (cmd&7)==5)
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DoPRG();
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else
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DoCHR();
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break;
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}
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}
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static DECLFR(H2288Read)
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{
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int bit;
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//printf("Read: $%04x, $%04x\n",A,X.PC);
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//DumpMem("out",0x8000,0xFFFF);
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bit=(A&1)^1;
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bit&=((A>>8)&1);
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bit^=1;
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return((X.DB&0xFE)|bit);
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}
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static void H2288Reset(void)
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{
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int x;
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SetReadHandler(0x5000,0x5FFF,H2288Read);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x5000,0x5FFF,PWrite);
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SetWriteHandler(0x8000,0xFFFF,H2288Write);
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for(x=0;x<8;x++) regs[x]=0;
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regs[4]=0;
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regs[5]=1;
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cmd=0;
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DoPRG();
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DoCHR();
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}
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void H2288_Init(CartInfo *info)
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{
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info->Power=H2288Reset;
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}
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