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93 lines
2.3 KiB
C++
93 lines
2.3 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) 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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* Many-in-one hacked mapper crap.
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*
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* Original BNROM is actually AxROM variations without mirroring control,
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* and haven't SRAM on-board, so it must be removed from here
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*
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* Difficult banking is what NINA board doing, most hacks for 34 mapper are
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* NINA hacks, so this is actually 34 mapper
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*
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*/
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#include "mapinc.h"
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static uint8 regs[3];
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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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{ regs, 3, "REGS" },
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{ 0 }
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};
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static void Sync(void) {
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setprg8r(0x10, 0x6000, 0);
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setprg32(0x8000, regs[0]);
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setchr4(0x0000, regs[1]);
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setchr4(0x1000, regs[2]);
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}
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static DECLFW(M34Write) {
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if (A >= 0x8000)
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regs[0] = V;
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else
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switch (A) {
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case 0x7ffd: regs[0] = V; break;
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case 0x7ffe: regs[1] = V; break;
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case 0x7fff: regs[2] = V; break;
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}
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Sync();
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}
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static void M34Power(void) {
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regs[0] = regs[1] = 0;
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regs[2] = 1;
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Sync();
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SetReadHandler(0x6000, 0x7ffc, CartBR);
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SetWriteHandler(0x6000, 0x7ffc, CartBW);
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SetReadHandler(0x8000, 0xffff, CartBR);
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SetWriteHandler(0x7ffd, 0xffff, M34Write);
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}
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static void M34Close(void) {
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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 Mapper34_Init(CartInfo *info) {
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info->Power = M34Power;
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info->Close = M34Close;
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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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