fceugx/source/fceultra/boards/dance2000.cpp
2016-09-17 20:43:24 -07:00

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);
}