112 lines
2.1 KiB
C
112 lines
2.1 KiB
C
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
*
|
|
* Copyright (C) 2008 -2020 dragon2snow,loong2snow from www.nesbbs.com
|
|
*
|
|
* 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[4];
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ regs, 4, "REGS" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void)
|
|
{
|
|
uint8 mirr;
|
|
int r = 0;
|
|
|
|
if ((regs[1]) & 0x20)
|
|
r = 1;
|
|
if ((regs[1] >> 4) & 0x01)
|
|
{
|
|
setprg16(0x8000, (regs[1] & 0x07) | (r << 3));
|
|
setprg16(0xC000, (regs[1] & 0x07) | (r << 3));
|
|
setchr8((regs[0] & 0x07) | (r << 3));
|
|
}
|
|
else
|
|
{
|
|
setprg32(0x8000, ((regs[1] >> 1) & 0x03) | (r << 2));
|
|
setchr8((regs[2] & 0x01) | (r << 3));
|
|
}
|
|
|
|
mirr = (((regs[0] >> 4) & 0x1));
|
|
|
|
if (mirr)
|
|
setmirror(0);
|
|
else
|
|
setmirror(1);
|
|
|
|
}
|
|
|
|
static DECLFW(KG256WriteHi) {
|
|
regs[2] = V;
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(KG256WriteLo) {
|
|
regs[A & 0x03] = V;
|
|
Sync();
|
|
}
|
|
|
|
static void KG256Power(void) {
|
|
|
|
regs[0] = 0;
|
|
regs[1] = 0;
|
|
regs[2] = 0;
|
|
regs[3] = 0;
|
|
|
|
SetWriteHandler(0x8000, 0xFFFF, KG256WriteHi);
|
|
SetWriteHandler(0x6000, 0x7FFF, KG256WriteLo);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
|
|
Sync();
|
|
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
static void KG256Reset(void) {
|
|
|
|
regs[0] = 0;
|
|
regs[1] = 0;
|
|
regs[2] = 0;
|
|
|
|
Sync();
|
|
}
|
|
|
|
void KG256_Init(CartInfo *info) {
|
|
|
|
Sync();
|
|
|
|
info->Power = KG256Power;
|
|
info->Reset = KG256Reset;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
GameStateRestore = StateRestore;
|
|
}
|
|
|
|
|
|
|