74bd49bfd8
- makes this consistent with the rest of the mapper files and codebase in general - this affects new and edited files in recent commits
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/* FCEUmm - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2020 negativeExponent
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* NES 2.0 Mapper 390 - Realtec 8031 */
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 regs[2];
|
|
static uint8 dipswitch;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ ®s, 2, "REG" },
|
|
{ &dipswitch, 1, "DPSW" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
switch ((regs[1] >> 4) & 3) {
|
|
case 0:
|
|
case 1:
|
|
/* UNROM */
|
|
setprg16(0x8000, regs[1]);
|
|
setprg16(0xC000, regs[1] | 7);
|
|
break;
|
|
case 2:
|
|
/* Maybe unused, NROM-256? */
|
|
setprg32(0x8000, regs[1] >> 1);
|
|
break;
|
|
case 3:
|
|
/* NROM-128 */
|
|
setprg16(0x8000, regs[1]);
|
|
setprg16(0xC000, regs[1]);
|
|
break;
|
|
}
|
|
setchr8(regs[0]);
|
|
setmirror(((regs[0] & 0x20) >> 5) ^ 1);
|
|
}
|
|
|
|
static DECLFR(M390Read) {
|
|
uint8 ret = CartBR(A);
|
|
if ((regs[1] & 0x30) == 0x10)
|
|
ret |= dipswitch;
|
|
return ret;
|
|
}
|
|
|
|
static DECLFW(M390Write) {
|
|
regs[(A >> 14) & 1] = A & 0x3F;
|
|
Sync();
|
|
}
|
|
|
|
static void M390Power(void) {
|
|
regs[0] = 0;
|
|
regs[1] = 0;
|
|
dipswitch = 11; /* hard-coded 150-in-1 menu */
|
|
Sync();
|
|
SetReadHandler(0x8000, 0xffff, M390Read);
|
|
SetWriteHandler(0x8000, 0xffff, M390Write);
|
|
}
|
|
|
|
static void M390Reset(void) {
|
|
dipswitch = 11; /* hard-coded 150-in-1 menu */
|
|
Sync();
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void Mapper390_Init(CartInfo *info) {
|
|
info->Reset = M390Reset;
|
|
info->Power = M390Power;
|
|
GameStateRestore = StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|