118 lines
3.1 KiB
C
Executable File
118 lines
3.1 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperF4device.c,v $
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**
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** $Revision: 1.8 $
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**
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** $Date: 2008-03-30 18:38:43 $
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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 "romMapperF4device.h"
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#include "MediaDb.h"
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#include "DeviceManager.h"
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#include "DebugDeviceManager.h"
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#include "SaveState.h"
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#include "IoPort.h"
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#include "Language.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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typedef struct {
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int deviceHandle;
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int debugHandle;
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int inverted;
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int status;
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} RomMapperF4device;
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static void saveState(RomMapperF4device* rm)
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{
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SaveState* state = saveStateOpenForWrite("mapperF4device");
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saveStateSet(state, "status", rm->status);
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saveStateClose(state);
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}
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static void loadState(RomMapperF4device* rm)
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{
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SaveState* state = saveStateOpenForRead("mapperF4device");
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rm->status = saveStateGet(state, "status", 0);
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saveStateClose(state);
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}
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static void destroy(RomMapperF4device* rm)
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{
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deviceManagerUnregister(rm->deviceHandle);
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debugDeviceUnregister(rm->debugHandle);
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ioPortUnregister(0xf4);
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free(rm);
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}
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static UInt8 read(RomMapperF4device* rm, UInt16 ioPort)
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{
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return rm->status;
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}
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static void write(RomMapperF4device* rm, UInt16 ioPort, UInt8 value)
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{
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if (rm->inverted) {
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rm->status = value | 0x7f;
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}
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else {
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rm->status = (rm->status & 0x20) | (value & 0xa0);
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}
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}
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static void reset(RomMapperF4device* rm)
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{
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rm->status = rm->inverted ? 0xff : 0;
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}
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static void getDebugInfo(RomMapperF4device* rm, DbgDevice* dbgDevice)
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{
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DbgIoPorts* ioPorts;
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ioPorts = dbgDeviceAddIoPorts(dbgDevice, langDbgDevF4Device(), 1);
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dbgIoPortsAddPort(ioPorts, 0, 0xf4, DBG_IO_READWRITE, read(rm, 0xe4));
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}
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int romMapperF4deviceCreate(int inverted)
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{
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DeviceCallbacks callbacks = { destroy, reset, saveState, loadState };
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DebugCallbacks dbgCallbacks = { getDebugInfo, NULL, NULL, NULL };
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RomMapperF4device* rm = malloc(sizeof(RomMapperF4device));
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rm->inverted = inverted;
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rm->deviceHandle = deviceManagerRegister(inverted ? ROM_F4INVERTED : ROM_F4DEVICE, &callbacks, rm);
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rm->debugHandle = debugDeviceRegister(DBGTYPE_BIOS, langDbgDevF4Device(), &dbgCallbacks, rm);
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ioPortRegister(0xf4, read, write, rm);
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reset(rm);
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return 1;
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}
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