mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2005 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"
|
|
#include "mmc3.h"
|
|
|
|
static uint8 *CHRRAM = NULL;
|
|
static int masko8[8] = { 63, 31, 15, 1, 3, 0, 0, 0 };
|
|
|
|
static void Super24PW(uint32 A, uint8 V) {
|
|
uint32 NV = V & masko8[EXPREGS[0] & 7];
|
|
NV |= (EXPREGS[1] << 1);
|
|
setprg8r((NV >> 6) & 0xF, A, NV);
|
|
}
|
|
|
|
static void Super24CW(uint32 A, uint8 V) {
|
|
if (EXPREGS[0] & 0x20)
|
|
setchr1r(0x10, A, V);
|
|
else{
|
|
uint32 NV = V | (EXPREGS[2] << 3);
|
|
setchr1r((NV >> 9) & 0xF, A, NV);
|
|
}
|
|
}
|
|
|
|
static DECLFW(Super24Write) {
|
|
switch (A) {
|
|
case 0x5FF0:
|
|
EXPREGS[0] = V;
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
break;
|
|
case 0x5FF1:
|
|
EXPREGS[1] = V;
|
|
FixMMC3PRG(MMC3_cmd);
|
|
break;
|
|
case 0x5FF2:
|
|
EXPREGS[2] = V;
|
|
FixMMC3CHR(MMC3_cmd);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void Super24Power(void) {
|
|
EXPREGS[0] = 0x24;
|
|
EXPREGS[1] = 159;
|
|
EXPREGS[2] = 0;
|
|
GenMMC3Power();
|
|
SetWriteHandler(0x5000, 0x7FFF, Super24Write);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
}
|
|
|
|
static void Super24Reset(void) {
|
|
EXPREGS[0] = 0x24;
|
|
EXPREGS[1] = 159;
|
|
EXPREGS[2] = 0;
|
|
MMC3RegReset();
|
|
}
|
|
|
|
static void Super24Close(void) {
|
|
if (CHRRAM)
|
|
FCEU_gfree(CHRRAM);
|
|
CHRRAM = NULL;
|
|
}
|
|
|
|
void Super24_Init(CartInfo *info) {
|
|
GenMMC3_Init(info, 128, 256, 0, 0);
|
|
info->Power = Super24Power;
|
|
info->Reset = Super24Reset;
|
|
info->Close = Super24Close;
|
|
cwrap = Super24CW;
|
|
pwrap = Super24PW;
|
|
CHRRAM = (uint8*)FCEU_gmalloc(8192);
|
|
SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
|
|
AddExState(CHRRAM, 8192, 0, "CHRR");
|
|
AddExState(EXPREGS, 3, 0, "BIG2");
|
|
}
|