142 lines
3.8 KiB
C
Executable File
142 lines
3.8 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperA1FMModem.c,v $
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**
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** $Revision: 1.3 $
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**
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** $Date: 2008-03-30 18:38:42 $
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**
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** More info: http://www.bluemsx.com
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**
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** Copyright (C) 2003-2006 Daniel Vik
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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******************************************************************************
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*/
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#include "romMapperA1FMModem.h"
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#include "MediaDb.h"
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#include "SlotManager.h"
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#include "DeviceManager.h"
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#include "Board.h"
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#include "Switches.h"
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#include "SaveState.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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extern UInt8 panasonicSramGet(UInt32 address);
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extern void panasonicSramSet(UInt32 address, UInt8 value);
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typedef struct {
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int deviceHandle;
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UInt8* romData;
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int romSize;
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int slot;
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int sslot;
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int startPage;
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int romMapper;
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} RomMapperA1FMModem;
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static void saveState(RomMapperA1FMModem* rm)
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{
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SaveState* state = saveStateOpenForWrite("mapperPanasonicA1FM");
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saveStateSet(state, "romMapper", rm->romMapper);
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saveStateClose(state);
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}
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static void loadState(RomMapperA1FMModem* rm)
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{
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SaveState* state = saveStateOpenForRead("mapperPanasonicA1FM");
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rm->romMapper = saveStateGet(state, "romMapper", 0);
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saveStateClose(state);
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slotMapPage(rm->slot, rm->sslot, rm->startPage, rm->romData + rm->romMapper * 0x2000, 1, 0);
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}
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static void destroy(RomMapperA1FMModem* rm)
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{
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slotUnregister(rm->slot, rm->sslot, rm->startPage);
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deviceManagerUnregister(rm->deviceHandle);
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free(rm->romData);
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free(rm);
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}
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static UInt8 read(RomMapperA1FMModem* rm, UInt16 address)
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{
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address += 0x4000;
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if (address >= 0x7fc0 && address < 0x7fd0) {
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switch (address & 0x0f) {
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case 4:
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return rm->romMapper;
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case 6:
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return switchGetFront() ? 0xfb : 0xff;
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default:
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return 0xff;
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}
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}
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return panasonicSramGet(address & 0x1fff);
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}
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static void write(RomMapperA1FMModem* rm, UInt16 address, UInt8 value)
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{
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address += 0x4000;
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if (address >= 0x6000 && address < 0x8000) {
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panasonicSramSet(address & 0x1fff, value);
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if (address == 0x7fc4) {
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rm->romMapper = value & 0x0f;
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slotMapPage(rm->slot, rm->sslot, rm->startPage, rm->romData + rm->romMapper * 0x2000, 1, 0);
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}
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}
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}
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static void reset(RomMapperA1FMModem* rm)
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{
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 0, rm->romData + rm->romMapper * 0x2000, 1, 0);
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 1, NULL, 0, 0);
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}
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int romMapperA1FMModemCreate(const char* filename, UInt8* romData,
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int size, int slot, int sslot, int startPage)
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{
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DeviceCallbacks callbacks = { destroy, reset, saveState, loadState };
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RomMapperA1FMModem* rm;
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rm = malloc(sizeof(RomMapperA1FMModem));
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rm->deviceHandle = deviceManagerRegister(ROM_FSA1FMMODEM, &callbacks, rm);
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slotRegister(slot, sslot, startPage, 2, read, read, write, destroy, rm);
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rm->romData = malloc(size);
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memcpy(rm->romData, romData, size);
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rm->romSize = size;
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rm->slot = slot;
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rm->sslot = sslot;
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rm->startPage = startPage;
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rm->romMapper = 0;
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reset(rm);
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return 1;
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}
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