280 lines
7.1 KiB
C
Executable File
280 lines
7.1 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperFMPAC.c,v $
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**
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** $Revision: 1.18 $
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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 "romMapperFMPAC.h"
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#include "MediaDb.h"
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#include "IoPort.h"
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#include "SlotManager.h"
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#include "DeviceManager.h"
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#include "DebugDeviceManager.h"
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#include "YM2413.h"
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#include "Board.h"
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#include "SaveState.h"
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#include "sramLoader.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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static char pacHeader[] = "PAC2 BACKUP DATA";
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typedef struct {
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int deviceHandle;
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int debugHandle;
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YM_2413* ym2413;
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UInt8 romData[0x10000];
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UInt8 sram[0x2000];
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char sramFilename[512];
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int bankSelect;
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int slot;
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int sslot;
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int startPage;
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int sramEnabled;
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int enable;
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UInt8 reg1ffe;
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UInt8 reg1fff;
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} RomMapperFMPAC;
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static void saveState(RomMapperFMPAC* rm)
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{
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SaveState* state = saveStateOpenForWrite("mapperFMPAC");
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saveStateSet(state, "bankSelect", rm->bankSelect);
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saveStateSet(state, "enable", rm->enable);
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saveStateSet(state, "sramEnabled", rm->sramEnabled);
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saveStateSet(state, "reg1ffe", rm->reg1ffe);
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saveStateSet(state, "reg1fff", rm->reg1fff);
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saveStateSetBuffer(state, "sram", rm->sram, sizeof(rm->sram));
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saveStateClose(state);
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if (rm->ym2413 != NULL) {
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ym2413SaveState(rm->ym2413);
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}
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}
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static void loadState(RomMapperFMPAC* rm)
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{
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SaveState* state = saveStateOpenForRead("mapperFMPAC");
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rm->bankSelect = saveStateGet(state, "bankSelect", 0);
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rm->enable = saveStateGet(state, "enable", 0);
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rm->sramEnabled = saveStateGet(state, "sramEnabled", 0);
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rm->reg1ffe = (UInt8)saveStateGet(state, "reg1ffe", 0);
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rm->reg1fff = (UInt8)saveStateGet(state, "reg1fff", 0);
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saveStateGetBuffer(state, "sram", rm->sram, sizeof(rm->sram));
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saveStateClose(state);
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if (rm->ym2413 != NULL) {
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ym2413LoadState(rm->ym2413);
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}
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}
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static void destroy(RomMapperFMPAC* rm)
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{
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sramSave(rm->sramFilename, rm->sram, 0x1ffe, pacHeader, strlen(pacHeader));
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ioPortUnregister(0x7c);
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ioPortUnregister(0x7d);
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if (rm->ym2413 != NULL) {
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ym2413Destroy(rm->ym2413);
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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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debugDeviceUnregister(rm->debugHandle);
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free(rm);
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}
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static void reset(RomMapperFMPAC* rm)
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{
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if (rm->ym2413 != NULL) {
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ym2413Reset(rm->ym2413);
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}
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rm->reg1ffe = 0xff;
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rm->reg1fff = 0xff;
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rm->enable = 0;
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rm->bankSelect = 0;
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}
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static UInt8 read(RomMapperFMPAC* rm, UInt16 address)
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{
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address &= 0x3fff;
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if (address == 0x3ff6) {
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return rm->enable;
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}
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if (address == 0x3ff7) {
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return rm->bankSelect;
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}
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if (!rm->sramEnabled) {
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return rm->romData[(rm->bankSelect << 14) + address];
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}
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if (address < 0x1ffe) {
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return rm->sram[address];
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}
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if (address == 0x1ffe) {
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return rm->reg1ffe;
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}
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if (address == 0x1fff) {
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return rm->reg1fff;
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}
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return 0xff;
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}
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static void write(RomMapperFMPAC* rm, UInt16 address, UInt8 value)
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{
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address &= 0x3fff;
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switch (address) {
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case 0x1ffe:
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if ((rm->enable & 0x10) == 0) {
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rm->reg1ffe = value;
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rm->sramEnabled = rm->reg1ffe == 0x4d && rm->reg1fff == 0x69;
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}
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break;
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case 0x1fff:
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if ((rm->enable & 0x10) == 0) {
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rm->reg1fff = value;
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rm->sramEnabled = rm->reg1ffe == 0x4d && rm->reg1fff == 0x69;
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}
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break;
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case 0x3ff4:
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if (rm->ym2413 != NULL) {
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ym2413WriteAddress(rm->ym2413, value);
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}
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break;
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case 0x3ff5:
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if (rm->ym2413 != NULL) {
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ym2413WriteData(rm->ym2413, value);
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}
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break;
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case 0x3ff6:
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rm->enable = value & 0x11;
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if (rm->enable & 0x10) {
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rm->reg1ffe = 0;
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rm->reg1fff = 0;
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rm->sramEnabled = 0;
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}
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break;
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case 0x3ff7:
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rm->bankSelect = value & 3;
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break;
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default:
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if (rm->sramEnabled && address < 0x1ffe) {
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rm->sram[address] = value;
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}
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break;
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}
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}
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static void writeIo(RomMapperFMPAC* rm, UInt16 port, UInt8 data)
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{
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if (rm->enable & 1) {
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switch (port & 1) {
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case 0:
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ym2413WriteAddress(rm->ym2413, data);
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break;
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case 1:
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ym2413WriteData(rm->ym2413, data);
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break;
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}
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}
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}
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static void getDebugInfo(RomMapperFMPAC* rm, DbgDevice* dbgDevice)
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{
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DbgIoPorts* ioPorts;
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if (rm->ym2413 == NULL) {
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return;
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}
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if (rm->enable & 1) {
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ioPorts = dbgDeviceAddIoPorts(dbgDevice, langDbgDevFmpac(), 2);
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dbgIoPortsAddPort(ioPorts, 0, 0x7c, DBG_IO_WRITE, 0);
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dbgIoPortsAddPort(ioPorts, 1, 0x7d, DBG_IO_WRITE, 0);
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}
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ym2413GetDebugInfo(rm->ym2413, dbgDevice);
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}
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int romMapperFMPACCreate(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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DebugCallbacks dbgCallbacks = { getDebugInfo, NULL, NULL, NULL };
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RomMapperFMPAC* rm;
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if (size != 0x10000) {
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return 0;
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}
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rm = malloc(sizeof(RomMapperFMPAC));
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rm->deviceHandle = deviceManagerRegister(ROM_FMPAC, &callbacks, rm);
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slotRegister(slot, sslot, startPage, 2, read, read, write, destroy, rm);
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rm->ym2413 = NULL;
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if (boardGetYm2413Enable()) {
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rm->ym2413 = ym2413Create(boardGetMixer());
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rm->debugHandle = debugDeviceRegister(DBGTYPE_AUDIO, langDbgDevFmpac(), &dbgCallbacks, rm);
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ioPortRegister(0x7c, NULL, writeIo, rm);
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ioPortRegister(0x7d, NULL, writeIo, rm);
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}
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memcpy(rm->romData, romData, 0x10000);
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memset(rm->sram, 0xff, 0x2000);
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rm->bankSelect = 0;
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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->sramEnabled = 0;
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strcpy(rm->sramFilename, sramCreateFilename(filename));
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sramLoad(rm->sramFilename, rm->sram, 0x1ffe, pacHeader, strlen(pacHeader));
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slotMapPage(rm->slot, rm->sslot, rm->startPage, rm->romData, 0, 0);
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slotMapPage(rm->slot, rm->sslot, rm->startPage + 1, rm->romData + 0x2000, 0, 0);
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reset(rm);
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return 1;
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}
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