mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-10 19:35:05 +01:00
111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2007 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 prg, mode;
|
|
static uint8 *WRAM = NULL;
|
|
static uint32 WRAMSIZE;
|
|
static uint32 lastnt = 0;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ &prg, 1, "REGS" },
|
|
{ &mode, 1, "MODE" },
|
|
{ &lastnt, 4, "LSNT" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setmirror((mode ^ 1) & 1);
|
|
setprg8r(0x10, 0x6000, 0);
|
|
setchr4(0x0000, lastnt);
|
|
setchr4(0x1000, 1);
|
|
if (mode & 4)
|
|
setprg32(0x8000, prg & 7);
|
|
else {
|
|
setprg16(0x8000, prg & 0x0f);
|
|
setprg16(0xC000, 0);
|
|
}
|
|
}
|
|
|
|
static DECLFW(UNLD2000Write) {
|
|
switch (A) {
|
|
case 0x5000: prg = V; Sync(); break;
|
|
case 0x5200: mode = V; if (mode & 4) Sync(); break;
|
|
}
|
|
}
|
|
|
|
static DECLFR(UNLD2000Read) {
|
|
if (prg & 0x40)
|
|
return X.DB;
|
|
else
|
|
return CartBR(A);
|
|
}
|
|
|
|
static void UNLD2000Power(void) {
|
|
prg = mode = 0;
|
|
Sync();
|
|
SetReadHandler(0x6000, 0x7FFF, CartBR);
|
|
SetWriteHandler(0x6000, 0x7FFF, CartBW);
|
|
SetReadHandler(0x8000, 0xFFFF, UNLD2000Read);
|
|
SetWriteHandler(0x5000, 0x5FFF, UNLD2000Write);
|
|
FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
|
|
}
|
|
|
|
static void UNL2000Hook(uint32 A) {
|
|
if (mode & 2) {
|
|
if ((A & 0x3000) == 0x2000) {
|
|
uint32 curnt = A & 0x800;
|
|
if (curnt != lastnt) {
|
|
setchr4(0x0000, curnt >> 11);
|
|
lastnt = curnt;
|
|
}
|
|
}
|
|
} else {
|
|
lastnt = 0;
|
|
setchr4(0x0000, 0);
|
|
}
|
|
}
|
|
|
|
static void UNLD2000Close(void) {
|
|
if (WRAM)
|
|
FCEU_gfree(WRAM);
|
|
WRAM = NULL;
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void UNLD2000_Init(CartInfo *info) {
|
|
info->Power = UNLD2000Power;
|
|
info->Close = UNLD2000Close;
|
|
PPU_hook = UNL2000Hook;
|
|
GameStateRestore = StateRestore;
|
|
|
|
WRAMSIZE = 8192;
|
|
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
|
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
|
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
|
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|