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

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/****************************************************************************
* *
* 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 <Project64-core/N64System/Mips/Eeprom.h>
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/N64System/N64Class.h>
#include <time.h>
CEeprom::CEeprom(bool ReadOnly) :
m_ReadOnly(ReadOnly)
{
memset(m_EEPROM, 0xFF, sizeof(m_EEPROM));
}
CEeprom::~CEeprom()
{
}
uint8_t byte2bcd(int32_t n)
{
n %= 100;
return (uint8_t)(((n / 10) << 4) | (n % 10));
}
void CEeprom::EepromCommand(uint8_t * Command)
{
time_t curtime_time;
struct tm curtime;
if (g_System->m_SaveUsing == SaveChip_Auto)
{
g_System->m_SaveUsing = SaveChip_Eeprom_4K;
}
switch (Command[2])
{
case 0: // check
if (g_System->m_SaveUsing != SaveChip_Eeprom_4K && g_System->m_SaveUsing != SaveChip_Eeprom_16K)
{
Command[1] |= 0x80;
break;
}
if (Command[1] != 3)
{
Command[1] |= 0x40;
if ((Command[1] & 3) > 0)
{
Command[3] = 0x00;
}
if ((Command[1] & 3) > 1)
{
Command[4] = (g_System->m_SaveUsing == SaveChip_Eeprom_4K) ? 0x80 : 0xC0;
}
if ((Command[1] & 3) > 2)
{
Command[5] = 0x00;
}
}
else
{
Command[3] = 0x00;
Command[4] = g_System->m_SaveUsing == SaveChip_Eeprom_4K ? 0x80 : 0xC0;
Command[5] = 0x00;
}
break;
case 4: // Read from Eeprom
if (Command[0] != 2 && bHaveDebugger())
{
g_Notify->DisplayError("What am I meant to do with this Eeprom Command");
}
if (Command[1] != 8 && bHaveDebugger())
{
g_Notify->DisplayError("What am I meant to do with this Eeprom Command");
}
ReadFrom(&Command[4], Command[3]);
break;
case 5: //Write to Eeprom
if (Command[0] != 10 && bHaveDebugger())
{
g_Notify->DisplayError("What am I meant to do with this Eeprom Command");
}
if (Command[1] != 1 && bHaveDebugger())
{
g_Notify->DisplayError("What am I meant to do with this Eeprom Command");
}
WriteTo(&Command[4], Command[3]);
break;
case 6: //RTC Status query
Command[3] = 0x00;
Command[4] = 0x10;
Command[5] = 0x00;
break;
case 7: //Read RTC block
switch (Command[3])
{
case 0: //Block number
Command[4] = 0x00;
Command[5] = 0x02;
Command[12] = 0x00;
break;
case 1:
//read block, Command[2], Unimplemented
break;
case 2: //Set RTC Time
time(&curtime_time);
memcpy(&curtime, localtime(&curtime_time), sizeof(curtime)); // fd's fix
Command[4] = byte2bcd(curtime.tm_sec);
Command[5] = byte2bcd(curtime.tm_min);
Command[6] = 0x80 + byte2bcd(curtime.tm_hour);
Command[7] = byte2bcd(curtime.tm_mday);
Command[8] = byte2bcd(curtime.tm_wday);
Command[9] = byte2bcd(curtime.tm_mon + 1);
Command[10] = byte2bcd(curtime.tm_year);
Command[11] = byte2bcd(curtime.tm_year / 100);
Command[12] = 0x00; // status
break;
}
break;
case 8:
//Write RTC, unimplemented
if (g_Settings->LoadDword(Debugger_ShowPifErrors))
{
g_Notify->DisplayError("Write RTC, unimplemented");
}
break;
default:
if (g_Settings->LoadDword(Debugger_ShowPifErrors))
{
g_Notify->DisplayError(stdstr_f("Unknown EepromCommand %d", Command[2]).c_str());
}
}
}
void CEeprom::LoadEeprom()
{
memset(m_EEPROM, 0xFF, sizeof(m_EEPROM));
CPath FileName(g_Settings->LoadStringVal(Directory_NativeSave).c_str(), "");
if (g_Settings->LoadBool(Setting_UniqueSaveDir))
{
FileName.AppendDirectory(g_Settings->LoadStringVal(Game_UniqueSaveDir).c_str());
}
FileName.SetName(g_Settings->LoadStringVal(Game_GameName).c_str());
FileName.SetExtension("eep");
if (!FileName.DirectoryExists())
{
FileName.DirectoryCreate();
}
if (!m_File.Open(FileName, (m_ReadOnly ? CFileBase::modeRead : CFileBase::modeReadWrite) | CFileBase::modeNoTruncate | CFileBase::modeCreate))
{
#ifdef _WIN32
WriteTrace(TraceN64System, TraceError, "Failed to open (%s), ReadOnly = %d, LastError = %X", (const char *)FileName, m_ReadOnly, GetLastError());
#else
WriteTrace(TraceN64System, TraceError, "Failed to open (%s), ReadOnly = %d", (const char *)FileName, m_ReadOnly);
#endif
g_Notify->DisplayError(GS(MSG_FAIL_OPEN_EEPROM));
return;
}
m_File.SeekToBegin();
m_File.Read(m_EEPROM, sizeof(m_EEPROM));
}
void CEeprom::ReadFrom(uint8_t * Buffer, int32_t line)
{
int32_t i;
if (!m_File.IsOpen())
{
LoadEeprom();
}
for (i = 0; i < 8; i++)
{
Buffer[i] = m_EEPROM[line * 8 + i];
}
}
void CEeprom::WriteTo(uint8_t * Buffer, int32_t line)
{
if (m_ReadOnly)
{
return;
}
int32_t i;
if (!m_File.IsOpen())
{
LoadEeprom();
}
for (i = 0; i < 8; i++)
{
m_EEPROM[line * 8 + i] = Buffer[i];
}
m_File.Seek(line * 8, CFile::begin);
m_File.Write(Buffer, 8);
m_File.Flush();
}