mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 06:55:05 +01:00
165 lines
3.9 KiB
C++
165 lines
3.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2020 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
|
|
*
|
|
* Double Dragon 310000-in-1 (4040R)
|
|
* 700000-in-1 (BS-400R)(Unl)
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
#include "mmc3.h"
|
|
|
|
static uint8 pointer;
|
|
static uint8 offset;
|
|
static uint8 *WRAM = NULL;
|
|
static uint32 WRAMSIZE;
|
|
|
|
static int getPRGBankBS4XXXR(int bank)
|
|
{
|
|
if (((~bank) & 1) && (pointer & 0x40))
|
|
bank ^= 2;
|
|
return (bank & 2) ? (0xFE | (bank & 1)) : EXPREGS[4 | (bank & 1)];
|
|
}
|
|
|
|
static void BS4XXXRPW(uint32 A, uint8 V) {
|
|
|
|
if ((EXPREGS[3] >> 4) & 0x01)
|
|
{
|
|
int AND = ((EXPREGS[0] >> 1) & 1) ? 0x0F : 0x0F;
|
|
int OR = (EXPREGS[0] & 7) << 4;
|
|
int bank0 = getPRGBankBS4XXXR(0);
|
|
int bank1 = getPRGBankBS4XXXR(1);
|
|
if (!((EXPREGS[3] >> 1) & 1)) //16K Mode
|
|
{
|
|
setprg8(0x8000, ((bank0) & AND) | OR);
|
|
setprg8(0xA000, ((bank1) & AND) | OR);
|
|
setprg8(0xC000, ((bank0) & AND) | OR);
|
|
setprg8(0xE000, ((bank1) & AND) | OR);
|
|
}
|
|
else // 32K Mode
|
|
{
|
|
setprg8(0x8000, ((bank0) & AND) | OR);
|
|
setprg8(0xA000, ((bank1) & AND) | OR);
|
|
setprg8(0xC000, ((bank0 | 2) & AND) | OR);
|
|
setprg8(0xE000, ((bank1 | 2) & AND) | OR);
|
|
}
|
|
}
|
|
else // MMC3 Mode
|
|
{
|
|
int prgAND = ((EXPREGS[0] >> offset) & 1) ? 0x0F : 0x1F;
|
|
int prgOR = (EXPREGS[0] & 7) << 4;
|
|
setprg8(A, (V & prgAND) | (prgOR));
|
|
}
|
|
setprg8r(0x10, 0x6000, 0);
|
|
}
|
|
|
|
static void BS4XXXRCW(uint32 A, uint8 V) {
|
|
if ((EXPREGS[3] >> 4) & 1)
|
|
{
|
|
int AND = ((EXPREGS[0] >> 1) & 1) ? 0x0F : 0x0F;
|
|
int bank = EXPREGS[2] & AND;
|
|
int chrOR = ((EXPREGS[0] >> 3) & 7) << 4;
|
|
setchr8((bank) | (chrOR));
|
|
}
|
|
else
|
|
{
|
|
int chrAND = ((EXPREGS[0] >> 1) & 1) ? 0xFF : 0xFF;
|
|
int chrOR = ((EXPREGS[0] >> 3) & 7) << 7;
|
|
setchr1(A, (V & chrAND) | (chrOR));
|
|
}
|
|
}
|
|
|
|
static DECLFW(BS4XXXRHiWrite) {
|
|
// FCEU_printf("w: %04x-%02x\n",A,V)
|
|
if (A==0x8000)
|
|
{
|
|
pointer = MMC3_cmd ^ V;
|
|
}
|
|
else if (A == 0x8001)
|
|
{
|
|
if((MMC3_cmd & 7) > 5)
|
|
EXPREGS[4|(MMC3_cmd & 1)] = V;
|
|
}
|
|
MMC3_CMDWrite(A, V);
|
|
}
|
|
|
|
static DECLFW(BS4XXXRLoWrite) {
|
|
// FCEU_printf("w: %04x-%02x\n", A, V);
|
|
if (A & 0x800)
|
|
{
|
|
if (!(EXPREGS[3] & 0x80)) {
|
|
EXPREGS[A & 0x03] = V;
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
}
|
|
else if (EXPREGS[3] & 0x10)
|
|
{
|
|
EXPREGS[A & 0x03] = V;
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
}
|
|
else
|
|
WRAM[A - 0x6000] = V;
|
|
}
|
|
else
|
|
WRAM[A - 0x6000] = V;
|
|
}
|
|
|
|
|
|
static void BSXXXXRPower(void) {
|
|
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = EXPREGS[4] = EXPREGS[5] = 0;
|
|
GenMMC3Power();
|
|
SetReadHandler(0x6000, 0x7FFF, CartBR);
|
|
SetWriteHandler(0x6000, 0x7FFF, BS4XXXRLoWrite);
|
|
SetWriteHandler(0x8000, 0x9FFF, BS4XXXRHiWrite);
|
|
FixMMC3PRG(MMC3_cmd);
|
|
FixMMC3CHR(MMC3_cmd);
|
|
}
|
|
|
|
static void BS4XXXRClose(void) {
|
|
if (WRAM)
|
|
FCEU_gfree(WRAM);
|
|
WRAM = NULL;
|
|
}
|
|
|
|
void BSXXXXR_Init(CartInfo *info) {
|
|
GenMMC3_Init(info, 512, 256, 8, 0);
|
|
cwrap = BS4XXXRCW;
|
|
pwrap = BS4XXXRPW;
|
|
|
|
info->Power = BSXXXXRPower;
|
|
info->Close = BS4XXXRClose;
|
|
|
|
WRAMSIZE = 8192;
|
|
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
|
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
|
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
|
|
|
AddExState(EXPREGS, 8, 0, "EXPR");
|
|
}
|
|
|
|
void BS400R_Init(CartInfo *info) {
|
|
offset = 1;
|
|
BSXXXXR_Init(info);
|
|
}
|
|
|
|
void BS4040R_Init(CartInfo *info) {
|
|
offset = 6;
|
|
BSXXXXR_Init(info);
|
|
}
|