project64/Source/Project64-core/N64System/Mips/Mempak.cpp

135 lines
4.9 KiB
C++

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