124 lines
3.6 KiB
C
Executable File
124 lines
3.6 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperLodeRunner.c,v $
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**
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** $Revision: 1.6 $
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**
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** $Date: 2008-03-30 18:38:44 $
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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 "romMapperLodeRunner.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 "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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typedef struct {
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int deviceHandle;
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UInt8* romData;
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int slot;
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int sslot;
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int startPage;
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int size;
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int romMapper;
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} RomMapperLodeRunner;
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static void saveState(RomMapperLodeRunner* rm)
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{
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SaveState* state = saveStateOpenForWrite("mapperLodeRunner");
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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(RomMapperLodeRunner* rm)
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{
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SaveState* state = saveStateOpenForRead("mapperLodeRunner");
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UInt8* bankData;
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rm->romMapper = saveStateGet(state, "romMapper", 0);
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saveStateClose(state);
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bankData = rm->romData + (rm->romMapper << 14);
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slotMapPage(rm->slot, rm->sslot, rm->startPage, bankData, 1, 0);
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 1, bankData + 0x2000, 1, 0);
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}
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static void destroy(RomMapperLodeRunner* 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 void write(RomMapperLodeRunner* rm, UInt16 address, UInt8 value)
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{
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value &= (rm->size / 0x4000 - 1);
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if (rm->romMapper != value) {
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UInt8* bankData = rm->romData + ((int)value << 14);
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rm->romMapper = value;
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slotMapPage(rm->slot, rm->sslot, rm->startPage, bankData, 1, 0);
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 1, bankData + 0x2000, 1, 0);
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}
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}
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int romMapperLodeRunnerCreate(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, NULL, saveState, loadState };
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RomMapperLodeRunner* rm;
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if (size != 0x20000) {
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return 0;
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}
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rm = malloc(sizeof(RomMapperLodeRunner));
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rm->deviceHandle = deviceManagerRegister(ROM_LODERUNNER, &callbacks, rm);
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slotRegister(slot, sslot, startPage, 4, NULL, NULL, NULL, destroy, rm);
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slotRegisterWrite0(write, rm);
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rm->romData = malloc(size);
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memcpy(rm->romData, romData, size);
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rm->size = 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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slotMapPage(rm->slot, rm->sslot, rm->startPage, rm->romData + rm->romMapper * 0x2000, 1, 0);
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 1, rm->romData + rm->romMapper * 0x2000 + 0x2000, 1, 0);
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return 1;
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}
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