mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2009 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"
|
|
|
|
static uint8 reg[8];
|
|
static uint32 lastnt = 0;
|
|
static uint8 *WRAM = NULL;
|
|
static uint32 WRAMSIZE;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ reg, 2, "REG" },
|
|
{ &lastnt, 4, "LNT" },
|
|
{ 0 }
|
|
};
|
|
|
|
static uint8 bs_tbl[128] = {
|
|
0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, // 00
|
|
0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, // 10
|
|
0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, // 20
|
|
0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, // 30
|
|
0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, // 40
|
|
0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, // 50
|
|
0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x00, 0x10, 0x20, 0x30, // 60
|
|
0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, // 70
|
|
};
|
|
|
|
static uint8 br_tbl[16] = {
|
|
0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setchr8(0);
|
|
setprg8r(0x10, 0x6000, 0);
|
|
if(PRGsize[0] == 512 * 1024) {
|
|
if(reg[0] & 0x010) {
|
|
setprg32(0x8000, reg[0] & 7);
|
|
} else {
|
|
if(reg[0] & 0x40)
|
|
setprg8(0x8000, (reg[0] & 0x0F) | 0x20 | ((reg[0] & 0x20) >> 1));
|
|
}
|
|
if((reg[0] & 0x18) == 0x18)
|
|
setmirror(MI_H);
|
|
else
|
|
setmirror(MI_V);
|
|
} else {
|
|
setprg16(0x8000, bs_tbl[reg[0] & 0x7f] >> 4);
|
|
setprg16(0xc000, bs_tbl[reg[0] & 0x7f] & 0xf);
|
|
setmirror(MI_V);
|
|
}
|
|
}
|
|
|
|
static DECLFW(UNLPEC586Write) {
|
|
reg[(A & 0x700) >> 8] = V;
|
|
PEC586Hack = (reg[0] & 0x80) >> 7;
|
|
// FCEU_printf("bs %04x %02x\n", A, V);
|
|
Sync();
|
|
}
|
|
|
|
static DECLFR(UNLPEC586Read) {
|
|
// FCEU_printf("read %04x\n", A);
|
|
return (X.DB & 0xD8) | br_tbl[reg[4] >> 4];
|
|
}
|
|
|
|
static DECLFR(UNLPEC586ReadHi) {
|
|
if((reg[0] & 0x10) || ((reg[0] & 0x40) && (A < 0xA000)))
|
|
return CartBR(A);
|
|
else
|
|
return PRGptr[0][((0x0107 | ((A >> 7) & 0x0F8)) << 10) | (A & 0x3FF)];
|
|
}
|
|
|
|
static void UNLPEC586Power(void) {
|
|
if(PRGsize[0] == 512 * 1024)
|
|
reg[0] = 0x00;
|
|
else
|
|
reg[0] = 0x0E;
|
|
Sync();
|
|
SetReadHandler(0x6000, 0x7FFF, CartBR);
|
|
SetWriteHandler(0x6000, 0x7FFF, CartBW);
|
|
if(PRGsize[0] == 512 * 1024)
|
|
SetReadHandler(0x8000, 0xFFFF, UNLPEC586ReadHi);
|
|
else
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
SetWriteHandler(0x5000, 0x5fff, UNLPEC586Write);
|
|
SetReadHandler(0x5000, 0x5fff, UNLPEC586Read);
|
|
FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
|
|
}
|
|
|
|
static void UNLPEC586Close(void) {
|
|
if (WRAM)
|
|
FCEU_gfree(WRAM);
|
|
WRAM = NULL;
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void UNLPEC586Init(CartInfo *info) {
|
|
info->Power = UNLPEC586Power;
|
|
info->Close = UNLPEC586Close;
|
|
GameStateRestore = StateRestore;
|
|
|
|
WRAMSIZE = 8192;
|
|
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
|
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
|
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
|
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|