Akop Karapetyan
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperOpcodeBios.c,v $
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**
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** $Revision: 1.1 $
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**
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** $Date: 2008-11-23 20:26:12 $
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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 "romMapperOpcodeBios.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 "SlotManager.h"
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#include "SaveState.h"
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#include "AY8910.h"
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#include "Board.h"
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#include "IoPort.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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UInt8 biosLatch;
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int slot;
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int sslot;
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int startPage;
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int deviceHandle;
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int debugHandle;
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UInt8 biosRom[0x20000];
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} RomMapperOpcodeBios;
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static void saveState(RomMapperOpcodeBios* rm)
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{
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SaveState* state = saveStateOpenForWrite("mapperOpcodeBios");
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saveStateSet(state, "biosLatch", rm->biosLatch);
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saveStateClose(state);
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}
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static void loadState(RomMapperOpcodeBios* rm)
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{
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SaveState* state = saveStateOpenForRead("mapperOpcodeBios");
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rm->biosLatch = (UInt8)saveStateGet(state, "biosLatch", 0);
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saveStateClose(state);
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slotMapPage(rm->slot, rm->sslot, 0, rm->biosRom + rm->biosLatch * 0x2000, 1, 0);
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}
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static void destroy(RomMapperOpcodeBios* rm)
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{
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deviceManagerUnregister(rm->deviceHandle);
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debugDeviceUnregister(rm->debugHandle);
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ioPortUnregister(0x40);
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free(rm);
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}
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static UInt8 peek(RomMapperOpcodeBios* rm, UInt16 ioPort)
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{
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return rm->biosLatch;
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}
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static UInt8 read(RomMapperOpcodeBios* rm, UInt16 ioPort)
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{
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return rm->biosLatch;
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}
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static void write(RomMapperOpcodeBios* rm, UInt16 ioPort, UInt8 value)
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{
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rm->biosLatch = value & 0x03;
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slotMapPage(rm->slot, rm->sslot, 0, rm->biosRom + rm->biosLatch * 0x2000, 1, 0);
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}
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static void reset(RomMapperOpcodeBios* rm)
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{
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rm->biosLatch = 0;
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slotMapPage(rm->slot, rm->sslot, 0, rm->biosRom + rm->biosLatch * 0x2000, 1, 0);
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}
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static void getDebugInfo(RomMapperOpcodeBios* rm, DbgDevice* dbgDevice)
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{
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DbgIoPorts* ioPorts;
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ioPorts = dbgDeviceAddIoPorts(dbgDevice, "BIOS", 1);
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dbgIoPortsAddPort(ioPorts, 0, 0x40, DBG_IO_READWRITE, peek(rm, 0x40));
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dbgDeviceAddMemoryBlock(dbgDevice, "BIOS", 0, 0, sizeof(rm->biosRom), rm->biosRom);
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}
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int romMapperOpcodeBiosCreate(const char* filename, UInt8* romData,
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int size, int slot, int sslot,
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int startPage)
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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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RomMapperOpcodeBios* rm = malloc(sizeof(RomMapperOpcodeBios));
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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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memset(rm->biosRom, 0xff, sizeof(rm->biosRom));
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if (romData != NULL) {
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if (size > sizeof(rm->biosRom)) {
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size = sizeof(rm->biosRom);
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}
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memcpy(rm->biosRom, romData, size);
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}
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rm->deviceHandle = deviceManagerRegister(ROM_OPCODEBIOS, &callbacks, rm);
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rm->debugHandle = debugDeviceRegister(DBGTYPE_BIOS, "BIOS", &dbgCallbacks, rm);
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ioPortRegister(0x40, read, write, rm);
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reset(rm);
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return 1;
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}
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