mirror of
https://github.com/libretro/blueMSX-libretro.git
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125 lines
3.4 KiB
C
Executable File
125 lines
3.4 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperOpcodePsg.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 "romMapperOpcodePsg.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 "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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AY8910* ay8910;
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int deviceHandle;
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int debugHandle;
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} RomMapperOpcodePsg;
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static void saveState(RomMapperOpcodePsg* rm)
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{
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ay8910SaveState(rm->ay8910);
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}
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static void loadState(RomMapperOpcodePsg* rm)
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{
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ay8910LoadState(rm->ay8910);
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}
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static void destroy(RomMapperOpcodePsg* rm)
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{
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deviceManagerUnregister(rm->deviceHandle);
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debugDeviceUnregister(rm->debugHandle);
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ay8910Destroy(rm->ay8910);
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ioPortUnregister(0x50);
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ioPortUnregister(0x51);
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ioPortUnregister(0x52);
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free(rm);
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}
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static UInt8 peek(RomMapperOpcodePsg* rm, UInt16 ioPort)
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{
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return ay8910PeekData(rm->ay8910, ioPort);
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}
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static UInt8 read(RomMapperOpcodePsg* rm, UInt16 ioPort)
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{
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return ay8910ReadData(rm->ay8910, ioPort);
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}
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static void write(RomMapperOpcodePsg* rm, UInt16 ioPort, UInt8 value)
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{
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if ((ioPort & 3) == 0) {
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ay8910WriteAddress(rm->ay8910, ioPort, value);
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}
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if ((ioPort & 3) == 1) {
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ay8910WriteData(rm->ay8910, ioPort, value);
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}
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}
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static void reset(RomMapperOpcodePsg* rm)
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{
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ay8910Reset(rm->ay8910);
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}
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static void getDebugInfo(RomMapperOpcodePsg* rm, DbgDevice* dbgDevice)
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{
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DbgIoPorts* ioPorts;
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ioPorts = dbgDeviceAddIoPorts(dbgDevice, "AY8910", 3);
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dbgIoPortsAddPort(ioPorts, 0, 0x50, DBG_IO_WRITE, 0xff);
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dbgIoPortsAddPort(ioPorts, 1, 0x51, DBG_IO_WRITE, 0xff);
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dbgIoPortsAddPort(ioPorts, 2, 0x52, DBG_IO_READ, peek(rm, 0x52));
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}
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int romMapperOpcodePsgCreate()
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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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RomMapperOpcodePsg* rm = malloc(sizeof(RomMapperOpcodePsg));
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rm->deviceHandle = deviceManagerRegister(ROM_OPCODEPSG, &callbacks, rm);
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rm->debugHandle = debugDeviceRegister(DBGTYPE_AUDIO, "AY8910", &dbgCallbacks, rm);
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rm->ay8910 = ay8910Create(boardGetMixer(), AY8910_MSX, PSGTYPE_AY8910, 0, NULL);
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ioPortRegister(0x50, NULL, write, rm);
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ioPortRegister(0x51, NULL, write, rm);
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ioPortRegister(0x52, read, NULL, rm);
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reset(rm);
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return 1;
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}
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