project64/Source/Project64/N64 System/Mips/Mempak.cpp

151 lines
5.0 KiB
C++

/****************************************************************************
* *
* Project 64 - 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"
static BYTE Mempaks[4][0x8000];
HANDLE hMempakFile[4];
void Mempak::Close(void) {
for (int i = 0; i < 4; i++)
{
if (hMempakFile[i])
{
CloseHandle(hMempakFile[i]);
hMempakFile[i] = NULL;
}
}
}
void LoadMempak (int Control) {
CPath FileName;
DWORD dwRead;
stdstr MempakName;
bool bFormatMempak = false;
MempakName.Format("%s_Cont_%d", g_Settings->LoadString(Game_GameName).c_str(), Control + 1);
FileName.SetDriveDirectory(g_Settings->LoadString(Directory_NativeSave).c_str());
FileName.SetName(MempakName.c_str());
FileName.SetExtension("mpk");
if (!FileName.Exists())
{
bFormatMempak = true;
if (!FileName.DirectoryExists())
{
FileName.CreateDirectory();
}
BYTE Initilize[] = {
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], Initilize, 0x110);
for (int count = 0x110; count < 0x8000; count += 2)
{
Mempaks[Control][count] = 0x00;
Mempaks[Control][count + 1] = 0x03;
}
}
hMempakFile[Control] = CreateFile(FileName, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if (hMempakFile[Control] == INVALID_HANDLE_VALUE)
{
WriteTraceF(TraceError,__FUNCTION__ ": Failed to open (%s), lastError = %X",(LPCTSTR)FileName, GetLastError());
return;
}
SetFilePointer(hMempakFile[Control], 0, NULL, FILE_BEGIN);
if (bFormatMempak)
{
WriteFile(hMempakFile[Control], Mempaks[Control], 0x8000, &dwRead, NULL);
}
else
{
ReadFile(hMempakFile[Control], Mempaks[Control], 0x8000, &dwRead, NULL);
}
}
BYTE Mempak::CalculateCrc(BYTE * DataToCrc) {
DWORD Count;
DWORD XorTap;
int Length;
BYTE CRC = 0;
for (Count = 0; Count < 0x21; Count++) {
for (Length = 0x80; Length >= 1; Length >>= 1) {
XorTap = (CRC & 0x80) ? 0x85 : 0;
CRC <<= 1;
if (Count == 0x20) {
CRC &= 0xFF;
} else {
if ((*DataToCrc & Length) != 0) {
CRC |= 1;
}
}
CRC ^= XorTap;
}
DataToCrc++;
}
return CRC;
}
void Mempak::ReadFrom(int Control, int Address, BYTE * Buffer) {
if (Address < 0x8000) {
if (hMempakFile[Control] == NULL) {
LoadMempak(Control);
}
memcpy(Buffer, &Mempaks[Control][Address], 0x20);
} else {
memset(Buffer, 0, 0x20);
/* Rumble pack area */
}
Buffer[0x20] = CalculateCrc(Buffer);
}
void Mempak::WriteTo(int Control, int Address, BYTE * Buffer) {
DWORD dwWritten;
if (Address < 0x8000) {
if (hMempakFile[Control] == NULL) {
LoadMempak(Control);
}
memcpy(&Mempaks[Control][Address], Buffer, 0x20);
SetFilePointer(hMempakFile[Control], 0,NULL,FILE_BEGIN);
WriteFile(hMempakFile[Control], &Mempaks[Control][0], 0x8000, &dwWritten, NULL);
} else {
/* Rumble pack area */
}
Buffer[0x20] = CalculateCrc(Buffer);
}