120 lines
3.0 KiB
C
120 lines
3.0 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 regs[8];
|
|
static uint8 *WRAM = NULL;
|
|
static uint32 WRAMSIZE;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ regs, 8, "REGS" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setprg2r(0x10, 0x0800, 0);
|
|
setprg2r(0x10, 0x1000, 1);
|
|
setprg2r(0x10, 0x1800, 2);
|
|
setprg8r(0x10, 0x6000, 1);
|
|
setprg16(0x8000, 0);
|
|
setprg16(0xC000, ~0);
|
|
setchr8(0);
|
|
}
|
|
|
|
#if 0
|
|
static DECLFW(SSSNROMWrite)
|
|
{
|
|
CartBW(A,V);
|
|
}
|
|
#endif
|
|
|
|
static DECLFW(SSSNROMWrite) {
|
|
#if 0
|
|
FCEU_printf("write %04x %02x\n",A,V);
|
|
regs[A&7] = V;
|
|
#endif
|
|
}
|
|
|
|
static DECLFR(SSSNROMRead) {
|
|
/* FCEU_printf("read %04x\n",A); */
|
|
switch (A & 7) {
|
|
case 0: return regs[0] = 0xff; /* clear all exceptions */
|
|
case 2: return 0xc0; /* DIP selftest + freeplay */
|
|
case 3: return 0x00; /* 0, 1 - attract
|
|
* 2
|
|
* 4 - menu
|
|
* 8 - self check and game casette check
|
|
* 10 - lock?
|
|
* 20 - game title & count display
|
|
*/
|
|
case 7: return 0x22; /* TV type, key not turned, relay B */
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
static void SSSNROMPower(void) {
|
|
regs[0] = regs[1] = regs[2] = regs[3] = regs[4] = regs[5] = regs[6] = 0;
|
|
regs[7] = 0xff;
|
|
Sync();
|
|
/* SetWriteHandler(0x0000,0x1FFF,SSSNROMRamWrite); */
|
|
SetReadHandler(0x0800, 0x1FFF, CartBR);
|
|
SetWriteHandler(0x0800, 0x1FFF, CartBW);
|
|
SetReadHandler(0x5000, 0x5FFF, SSSNROMRead);
|
|
SetWriteHandler(0x5000, 0x5FFF, SSSNROMWrite);
|
|
SetReadHandler(0x6000, 0x7FFF, CartBR);
|
|
SetWriteHandler(0x6000, 0x7FFF, CartBW);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
|
|
}
|
|
|
|
static void SSSNROMReset(void) {
|
|
regs[1] = regs[2] = regs[3] = regs[4] = regs[5] = regs[6] = 0;
|
|
}
|
|
|
|
static void SSSNROMClose(void) {
|
|
if (WRAM)
|
|
FCEU_gfree(WRAM);
|
|
WRAM = NULL;
|
|
}
|
|
|
|
static void SSSNROMIRQHook(void) {
|
|
/* X6502_IRQBegin(FCEU_IQEXT); */
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void SSSNROM_Init(CartInfo *info) {
|
|
info->Reset = SSSNROMReset;
|
|
info->Power = SSSNROMPower;
|
|
info->Close = SSSNROMClose;
|
|
GameHBIRQHook = SSSNROMIRQHook;
|
|
GameStateRestore = StateRestore;
|
|
|
|
WRAMSIZE = 16384;
|
|
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
|
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
|
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|