mirror of
https://github.com/dborth/fceugx.git
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79 lines
1.8 KiB
C++
79 lines
1.8 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., 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 cmd;
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static uint8 DRegs[8];
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static SFORMAT StateRegs[] =
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{
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{ &cmd, 1, "CMD" },
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{ DRegs, 8, "DREG" },
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{ 0 }
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};
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static void Sync(void) {
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setchr2(0x0000, DRegs[0]);
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setchr2(0x0800, DRegs[1]);
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int x;
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for (x = 0; x < 4; x++)
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setchr1(0x1000 + (x << 10), DRegs[2 + x]);
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setprg8(0x8000, DRegs[6]);
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setprg8(0xa000, DRegs[7]);
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setprg8(0xc000, ~1);
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setprg8(0xe000, ~0);
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}
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static void StateRestore(int version) {
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Sync();
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}
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static DECLFW(M206Write) {
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switch (A & 0x8001) {
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case 0x8000: cmd = V & 0x07; break;
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case 0x8001:
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if (cmd <= 0x05)
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V &= 0x3F;
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else
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V &= 0x0F;
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if (cmd <= 0x01) V >>= 1;
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DRegs[cmd & 0x07] = V;
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Sync();
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break;
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}
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}
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static void M206Power(void) {
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cmd = 0;
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DRegs[6] = 0;
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DRegs[7] = 1;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M206Write);
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}
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void Mapper206_Init(CartInfo *info) {
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info->Power = M206Power;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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