93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2005 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];
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static uint8 mirror, cmd;
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static uint8 *WRAM=NULL;
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static SFORMAT StateRegs[]=
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{
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{&cmd, 1, "CMD"},
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{&mirror, 1, "MIRR"},
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{reg, 8, "REGS"},
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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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setmirror(mirror^1);
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setprg8(0x8000,reg[0]);
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setprg8(0xA000,reg[1]);
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setchr2(0x0000,reg[2]>>1);
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setchr2(0x0800,reg[3]>>1);
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setchr1(0x1000,reg[4]);
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setchr1(0x1400,reg[5]);
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setchr1(0x1800,reg[6]);
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setchr1(0x1C00,reg[7]);
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}
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static DECLFW(M112Write)
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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 0xe000: mirror=V&1; Sync(); ;break;
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case 0x8000: cmd=V&7; break;
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case 0xa000: reg[cmd]=V; Sync(); break;
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// default: FCEU_printf("bs %04x %02x\n",A,V);
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}
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}
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static void M112Close(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 M112Power(void)
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{
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setprg16(0xC000,~0);
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setprg8r(0x10,0x6000,0);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x8000,0xFFFF,M112Write);
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SetWriteHandler(0x4020,0x5FFF,M112Write);
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SetReadHandler(0x6000,0x7FFF,CartBR);
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SetWriteHandler(0x6000,0x7FFF,CartBW);
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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 Mapper112_Init(CartInfo *info)
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{
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info->Power=M112Power;
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info->Close=M112Close;
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GameStateRestore=StateRestore;
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WRAM=(uint8*)FCEU_gmalloc(8192);
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SetupCartPRGMapping(0x10,WRAM,8192,1);
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AddExState(WRAM, 8192, 0, "WRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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