92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2020
|
|
*
|
|
* 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
|
|
*
|
|
* NewStar 12-in-1 and 76-in-1
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 regs[2];
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ regs, 2, "REGS" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
uint8 mode = ((regs[0] >> 2) & 2) | ((regs[1] >> 6) & 1);
|
|
uint8 bank = ((regs[1] << 5) & 0x20) | ((regs[1] >> 1) & 0x18);
|
|
uint8 block = (regs[0] & 7);
|
|
switch (mode) {
|
|
case 0: /* UNROM */
|
|
setprg16(0x8000, bank | block);
|
|
setprg16(0xC000, bank | 7);
|
|
break;
|
|
case 1:
|
|
setprg16(0x8000, bank | block & 0xFE);
|
|
setprg16(0xC000, bank | 7);
|
|
break;
|
|
case 2: /* NROM-128 */
|
|
setprg16(0x8000, bank | block);
|
|
setprg16(0xC000, bank | block);
|
|
break;
|
|
case 3: /* NROM-256 */
|
|
setprg32(0x8000, (bank | block) >> 1);
|
|
break;
|
|
}
|
|
setchr8(0);
|
|
setmirror(((regs[1] >> 7) & 1) ^ 1);
|
|
}
|
|
|
|
static DECLFW(M293Write1) {
|
|
regs[0] = V;
|
|
regs[1] = V;
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(M293Write2) {
|
|
regs[1] = V;
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(M293Write3) {
|
|
regs[0] = V;
|
|
Sync();
|
|
}
|
|
|
|
static void M293Power(void) {
|
|
regs[0] = regs[1] = 0;
|
|
Sync();
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
SetWriteHandler(0x8000, 0x9FFF, M293Write1);
|
|
SetWriteHandler(0xA000, 0xBFFF, M293Write2);
|
|
SetWriteHandler(0xC000, 0xDFFF, M293Write3);
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
/* BMC 12-in-1/76-in-1 (NewStar) (Unl) */
|
|
void Mapper293_Init(CartInfo *info) {
|
|
info->Power = M293Power;
|
|
GameStateRestore = StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|