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

115 lines
3.1 KiB
C++
Raw Normal View History

#include "stdafx.h"
CEeprom::CEeprom (bool ReadOnly):
m_ReadOnly(ReadOnly),
m_hFile(NULL)
{
memset(m_EEPROM,0,sizeof(m_EEPROM));
//LoadEeprom();
}
CEeprom::~CEeprom (void) {
if (m_hFile) {
CloseHandle(m_hFile);
m_hFile = NULL;
}
}
void CEeprom::EepromCommand ( BYTE * Command) {
if (g_SaveUsing == SaveChip_Auto) { g_SaveUsing = SaveChip_Eeprom_4K; }
switch (Command[2]) {
case 0: // check
if (g_SaveUsing != SaveChip_Eeprom_4K && g_SaveUsing != SaveChip_Eeprom_16K) {
Command[1] |= 0x80;
break;
}
if (Command[1] != 3) {
Command[1] |= 0x40;
if ((Command[1] & 3) > 0) { Command[3] = 0x00; }
if (g_SaveUsing == SaveChip_Eeprom_4K) {
if ((Command[1] & 3) > 1) { Command[4] = 0x80; }
} else {
if ((Command[1] & 3) > 1) { Command[4] = 0xC0; }
}
if ((Command[1] & 3) > 2) { Command[5] = 0x00; }
} else {
Command[3] = 0x00;
Command[4] = g_SaveUsing == SaveChip_Eeprom_4K?0x80:0xC0;
Command[5] = 0x00;
}
break;
case 4: // Read from Eeprom
#ifndef EXTERNAL_RELEASE
if (Command[0] != 2) { DisplayError("What am I meant to do with this Eeprom Command"); }
if (Command[1] != 8) { DisplayError("What am I meant to do with this Eeprom Command"); }
#endif
ReadFrom(&Command[4],Command[3]);
break;
case 5:
#ifndef EXTERNAL_RELEASE
if (Command[0] != 10) { DisplayError("What am I meant to do with this Eeprom Command"); }
if (Command[1] != 1) { DisplayError("What am I meant to do with this Eeprom Command"); }
#endif
WriteTo(&Command[4],Command[3]);
break;
default:
if (_Settings->LoadDword(Debugger_ShowPifErrors)) { DisplayError("Unknown EepromCommand %d",Command[2]); }
}
}
void CEeprom::LoadEeprom (void) {
CPath FileName;
DWORD dwRead;
memset(m_EEPROM,0,sizeof(m_EEPROM));
FileName.SetDriveDirectory( _Settings->LoadString(Directory_NativeSave).c_str());
FileName.SetName(_Settings->LoadString(Game_GameName).c_str());
FileName.SetExtension("eep");
if (!FileName.DirectoryExists())
{
FileName.CreateDirectory();
}
m_hFile = CreateFile(FileName,m_ReadOnly ? GENERIC_READ : GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if (m_hFile == INVALID_HANDLE_VALUE)
{
WriteTraceF(TraceError,"CEeprom::LoadEeprom: Failed to open (%s), ReadOnly = %d, LastError = %X",(LPCTSTR)FileName, m_ReadOnly, GetLastError());
DisplayError(GS(MSG_FAIL_OPEN_EEPROM));
return;
}
SetFilePointer(m_hFile,0,NULL,FILE_BEGIN);
ReadFile(m_hFile,m_EEPROM,sizeof(m_EEPROM),&dwRead,NULL);
}
void CEeprom::ReadFrom(BYTE * Buffer, int line) {
int i;
if (m_hFile == NULL)
{
LoadEeprom();
}
for(i=0; i < 8; i++)
{
Buffer[i] = m_EEPROM[line*8+i];
}
}
void CEeprom::WriteTo(BYTE * Buffer, int line) {
DWORD dwWritten;
int i;
if (m_hFile == NULL)
{
LoadEeprom();
}
for(i=0;i<8;i++) { m_EEPROM[line*8+i]=Buffer[i]; }
SetFilePointer(m_hFile,line*8,NULL,FILE_BEGIN);
WriteFile( m_hFile,Buffer,8,&dwWritten,NULL );
FlushFileBuffers(m_hFile);
}