mirror of
https://github.com/dborth/fceugx.git
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122 lines
2.7 KiB
C++
122 lines
2.7 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) 2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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static uint8 chrlo[8], chrhi[8], prg, mirr, mirrisused = 0;
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static uint8 *WRAM=NULL;
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[]=
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{
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{&prg, 1, "PREG"},
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{chrlo, 8, "CRGL"},
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{chrhi, 8, "CRGH"},
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{&mirr, 1, "MIRR"},
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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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uint32 i;
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for(i=0; i<8; i++)
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setchr1(i<<10, chrlo[i]|(chrhi[i] << 8));
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setprg8r(0x10,0x6000,0);
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setprg16(0x8000,prg);
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setprg16(0xC000,~0);
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if(mirrisused)
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setmirror(mirr ^ 1);
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else
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setmirror(MI_0);
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}
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static DECLFW(M156Write)
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{
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switch(A) {
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case 0xC000:
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case 0xC001:
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case 0xC002:
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case 0xC003: chrlo[A&3] = V; Sync(); break;
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case 0xC004:
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case 0xC005:
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case 0xC006:
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case 0xC007: chrhi[A&3] = V; Sync(); break;
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case 0xC008:
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case 0xC009:
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case 0xC00A:
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case 0xC00B: chrlo[4+(A&3)] = V; Sync(); break;
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case 0xC00C:
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case 0xC00D:
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case 0xC00E:
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case 0xC00F: chrhi[4+(A&3)] = V; Sync(); break;
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case 0xC010: prg = V; Sync(); break;
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case 0xC014: mirr = V; mirrisused = 1; Sync(); break;
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}
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}
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static void M156Reset(void)
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{
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uint32 i;
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for(i=0;i<8;i++)
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{
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chrlo[i]=0;
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chrhi[i]=0;
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}
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prg=0;
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mirr=0;
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mirrisused = 0;
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}
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static void M156Power(void)
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{
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M156Reset();
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Sync();
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SetReadHandler(0x6000,0xFFFF,CartBR);
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SetWriteHandler(0x6000,0x7FFF,CartBW);
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SetWriteHandler(0xC000,0xCFFF,M156Write);
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}
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static void M156Close(void)
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{
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if(WRAM)
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FCEU_gfree(WRAM);
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WRAM=NULL;
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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 Mapper156_Init(CartInfo *info)
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{
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info->Power=M156Reset;
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info->Power=M156Power;
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info->Close=M156Close;
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WRAMSIZE=8192;
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WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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GameStateRestore=StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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