mirror of
https://github.com/dborth/fceugx.git
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104 lines
2.4 KiB
C++
104 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) 2012 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 preg[2], creg[8], mirr;
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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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{ preg, 4, "PREG" },
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{ creg, 8, "CREG" },
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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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uint16 swap = ((mirr & 2) << 13);
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setmirror((mirr & 1) ^ 1);
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setprg8r(0x10, 0x6000, 0);
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setprg8(0x8000 ^ swap, preg[0]);
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setprg8(0xA000, preg[1]);
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setprg8(0xC000 ^ swap, ~1);
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setprg8(0xE000, ~0);
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uint8 i;
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for (i = 0; i < 8; i++)
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setchr1(i << 10, creg[i]);
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}
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static DECLFW(M32Write0) {
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preg[0] = V;
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Sync();
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}
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static DECLFW(M32Write1) {
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mirr = V;
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Sync();
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}
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static DECLFW(M32Write2) {
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preg[1] = V;
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Sync();
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}
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static DECLFW(M32Write3) {
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creg[A & 7] = V;
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Sync();
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}
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static void M32Power(void) {
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Sync();
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SetReadHandler(0x6000,0x7fff,CartBR);
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SetWriteHandler(0x6000,0x7fff,CartBW);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0x8FFF, M32Write0);
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SetWriteHandler(0x9000, 0x9FFF, M32Write1);
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SetWriteHandler(0xA000, 0xAFFF, M32Write2);
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SetWriteHandler(0xB000, 0xBFFF, M32Write3);
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FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
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}
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static void M32Close(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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Sync();
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}
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void Mapper32_Init(CartInfo *info) {
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info->Power = M32Power;
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info->Close = M32Close;
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GameStateRestore = StateRestore;
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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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AddExState(&StateRegs, ~0, 0, 0);
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}
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