135 lines
4.9 KiB
C++
135 lines
4.9 KiB
C++
/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#include "stdafx.h"
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#include "Mempak.H"
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#include <stdio.h>
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#include <Common/path.h>
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uint8_t Mempaks[4][128 * 256]; /* [CONTROLLERS][PAGES][BYTES_PER_PAGE] */
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CPath MempakNames[4];
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void Mempak::Load(int32_t Control)
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{
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stdstr MempakName;
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MempakName.Format("%s_Cont_%d", g_Settings->LoadStringVal(Game_GameName).c_str(), Control + 1);
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MempakNames[Control] = CPath(g_Settings->LoadStringVal(Directory_NativeSave).c_str(), stdstr_f("%s.mpk",MempakName.c_str()).c_str());
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if (!MempakNames[Control].DirectoryExists())
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{
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MempakNames[Control].DirectoryCreate();
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}
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if (MempakNames[Control].Exists())
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{
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FILE *mempak = fopen(MempakNames[Control], "rb");
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fread(Mempaks[Control], 1, 0x8000, mempak);
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fclose(mempak);
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}
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else
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{
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Mempak::Format(Control);
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}
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}
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void Mempak::Format(int32_t Control)
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{
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static const uint8_t Initialize[] = {
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0x81, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
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0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD,
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0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x71, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
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};
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memcpy(&Mempaks[Control][0], &Initialize[0], sizeof(Initialize));
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for (size_t count = sizeof(Initialize); count < 128 * 256; count += 2)
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{
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Mempaks[Control][count + 0] = 0x00;
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Mempaks[Control][count + 1] = 0x03;
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}
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}
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uint8_t Mempak::CalculateCrc(uint8_t * DataToCrc)
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{
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uint32_t Count;
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uint32_t XorTap;
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int32_t Length;
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uint8_t CRC = 0;
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for (Count = 0; Count < 0x21; Count++)
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{
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for (Length = 0x80; Length >= 1; Length >>= 1)
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{
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XorTap = (CRC & 0x80) ? 0x85 : 0x00;
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CRC <<= 1;
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if (Count == 0x20)
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{
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CRC &= 0xFF;
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}
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else
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{
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if ((*DataToCrc & Length) != 0)
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{
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CRC |= 1;
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}
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}
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CRC ^= XorTap;
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}
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DataToCrc++;
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}
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return CRC;
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}
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void Mempak::ReadFrom(int32_t Control, uint32_t address, uint8_t * data)
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{
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if (address < 0x8000)
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{
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memcpy(data, &Mempaks[Control][address], 0x20);
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}
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else
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{
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memset(data, 0x00, 0x20);
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/* Rumble pack area */
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}
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}
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void Mempak::WriteTo(int32_t Control, uint32_t address, uint8_t * data)
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{
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if (address < 0x8000)
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{
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memcpy(&Mempaks[Control][address], data, 0x20);
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FILE* mempak = fopen(MempakNames[Control], "wb");
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fwrite(Mempaks[Control], 1, 0x8000, mempak);
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fclose(mempak);
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}
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else
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{
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/* Rumble pack area */
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}
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} |