mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2005 CaH4e3
|
|
* Copyright (C) 2009 qeed
|
|
*
|
|
* 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
|
|
*
|
|
* 22 + Contra Reset based custom mapper...
|
|
*
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 latche, reset;
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ &reset, 1, "RST" },
|
|
{ &latche, 1, "LATC" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
if(reset) {
|
|
setprg16(0x8000, latche & 7);
|
|
setprg16(0xC000, 7);
|
|
setmirror(MI_V);
|
|
} else {
|
|
uint32 bank = (latche & 0x1F) + 8;
|
|
if (latche & 0x20) {
|
|
setprg16(0x8000, bank);
|
|
setprg16(0xC000, bank);
|
|
} else
|
|
setprg32(0x8000, bank >> 1);
|
|
setmirror((latche >> 6) & 1);
|
|
}
|
|
setchr8(0);
|
|
}
|
|
|
|
static DECLFW(M230Write) {
|
|
latche = V;
|
|
Sync();
|
|
}
|
|
|
|
static void M230Reset(void) {
|
|
reset ^= 1;
|
|
Sync();
|
|
}
|
|
|
|
static void M230Power(void) {
|
|
latche = reset = 0;
|
|
Sync();
|
|
SetWriteHandler(0x8000, 0xFFFF, M230Write);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void Mapper230_Init(CartInfo *info) {
|
|
info->Power = M230Power;
|
|
info->Reset = M230Reset;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
GameStateRestore = StateRestore;
|
|
}
|