mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2012 CaH4e3
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 regs[8];
|
|
static uint8 *WRAM = NULL;
|
|
static uint32 WRAMSIZE;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ regs, 8, "REGS" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setprg2r(0x10, 0x6800, 0);
|
|
setprg8(0x8000, regs[0]);
|
|
setprg8(0xA000, regs[1]);
|
|
setprg8(0xC000, regs[2]);
|
|
setprg8(0xE000, regs[3]);
|
|
setchr2(0x0000, regs[4]);
|
|
setchr2(0x0800, regs[5]);
|
|
setchr2(0x1000, regs[6]);
|
|
setchr2(0x1800, regs[7]);
|
|
}
|
|
|
|
static DECLFW(M246Write) {
|
|
regs[A & 7] = V;
|
|
Sync();
|
|
}
|
|
|
|
static void M246Power(void) {
|
|
regs[0] = regs[1] = regs[2] = regs[3] = ~0;
|
|
Sync();
|
|
SetWriteHandler(0x6000, 0x67FF, M246Write);
|
|
SetReadHandler(0x6800, 0x6FFF, CartBR);
|
|
SetWriteHandler(0x6800, 0x6FFF, CartBW);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
}
|
|
|
|
static void M246Close(void)
|
|
{
|
|
if(WRAM)
|
|
FCEU_gfree(WRAM);
|
|
WRAM = NULL;
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void Mapper246_Init(CartInfo *info) {
|
|
info->Power = M246Power;
|
|
info->Close = M246Close;
|
|
GameStateRestore = StateRestore;
|
|
|
|
WRAMSIZE = 2048;
|
|
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
|
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
|
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
|
|
|
if (info->battery) {
|
|
info->SaveGame[0] = WRAM;
|
|
info->SaveGameLen[0] = WRAMSIZE;
|
|
}
|
|
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|