mirror of
https://github.com/dborth/fceugx.git
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116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2009 CaH4e3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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static uint8 regs[8];
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static uint8 *WRAM = NULL;
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[] =
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{
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{ regs, 8, "REGS" },
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{ 0 }
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};
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static void Sync(void) {
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setprg2r(0x10, 0x0800, 0);
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setprg2r(0x10, 0x1000, 1);
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setprg2r(0x10, 0x1800, 2);
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setprg8r(0x10, 0x6000, 1);
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setprg16(0x8000, 0);
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setprg16(0xC000, ~0);
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setchr8(0);
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}
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//static DECLFW(SSSNROMWrite)
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//{
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// CartBW(A,V);
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//}
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static DECLFW(SSSNROMWrite) {
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// FCEU_printf("write %04x %02x\n",A,V);
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// regs[A&7] = V;
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}
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static DECLFR(SSSNROMRead) {
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// FCEU_printf("read %04x\n",A);
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switch (A & 7) {
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case 0: return regs[0] = 0xff; // clear all exceptions
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case 2: return 0xc0; // DIP selftest + freeplay
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case 3: return 0x00; // 0, 1 - attract
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// 2
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// 4 - menu
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// 8 - self check and game casette check
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// 10 - lock?
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// 20 - game title & count display
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case 7: return 0x22; // TV type, key not turned, relay B
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default: return 0;
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}
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}
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static void SSSNROMPower(void) {
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regs[0] = regs[1] = regs[2] = regs[3] = regs[4] = regs[5] = regs[6] = 0;
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regs[7] = 0xff;
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Sync();
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memset(WRAM, 0x00, WRAMSIZE);
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// SetWriteHandler(0x0000,0x1FFF,SSSNROMRamWrite);
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SetReadHandler(0x0800, 0x1FFF, CartBR);
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SetWriteHandler(0x0800, 0x1FFF, CartBW);
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SetReadHandler(0x5000, 0x5FFF, SSSNROMRead);
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SetWriteHandler(0x5000, 0x5FFF, SSSNROMWrite);
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SetReadHandler(0x6000, 0x7FFF, CartBR);
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SetWriteHandler(0x6000, 0x7FFF, CartBW);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
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}
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static void SSSNROMReset(void) {
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regs[1] = regs[2] = regs[3] = regs[4] = regs[5] = regs[6] = 0;
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}
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static void SSSNROMClose(void) {
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if (WRAM)
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FCEU_gfree(WRAM);
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WRAM = NULL;
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}
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static void SSSNROMIRQHook(void) {
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// X6502_IRQBegin(FCEU_IQEXT);
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}
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static void StateRestore(int version) {
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Sync();
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}
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void SSSNROM_Init(CartInfo *info) {
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info->Reset = SSSNROMReset;
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info->Power = SSSNROMPower;
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info->Close = SSSNROMClose;
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GameHBIRQHook = SSSNROMIRQHook;
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GameStateRestore = StateRestore;
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WRAMSIZE = 16384;
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WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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