function void ExtraChar.InitExtraSlots()
{
	zeroMemory(sharedmemory.xtrachar, 0x08)
	
	ExtraChar.LoadExtraSlots()	// Read saved extra characters data
	ExtraChar.SaveExtraSlots()	// Save to create the keys in the Persistent Data file
	
	ExtraChar.debugLog("Extra SRAM and Persistent Data loaded.")	// Debug message
	
	ExtraChar.InitExtraSlots_LoadLegacy()	// Legacy load
	ExtraChar.InitExtraSlots_SaveCorrection()	// Fix your saves if they break
}

function void ExtraChar.InitExtraSlots_SaveCorrection()
{
	// Loop simulates slots
	for (u32 i = 0x00; i < 0x08; ++i)
	{
		u32 tempValue0 = 0xffffe6ac + i * 0x0a	// Slot address
		u32 tempValue1 = sharedmemory.xtrachar + i	// Extra address
		u8 tempValue2 = (u8[tempValue0 + 0x00] & 0x80)	// Unused slot
		u8 tempValue3 = (u8[tempValue0 + 0x02] >> 0x04)	// Character (see CHARS_* constants)
		
		// If an extra character is sitting here
		if (u8[tempValue1] > 0x00)
		{
			// This slot is unused (has been deleted), or is no longer Sonic only
			if (tempValue2 || tempValue3 != CHARS_SONIC_ALONE)
			{
				// Debug message
				ExtraChar.debugLog(stringformat("Extra #%d was deleted from slot #%d; Extra address: 0x%06x", u8[tempValue1], i + 0x01, tempValue1))
				
				// Remove an extra character from a slot
				zeroMemory(tempValue1, 0x01)
				ExtraChar.SaveExtraSlots()
			}
		}
	}
}

function void ExtraChar.LoadExtraSlots()
{
	SRAM.load(sharedmemory.xtrachar, 0x660, 0x08)
	System.loadPersistentData(sharedmemory.xtrachar, "SRAM_Extraslots", 0x08)
}

function void ExtraChar.InitExtraSlots_LoadLegacy()
{
	// Loop simulates slots
	for (u8 i = 0x00; i < 0x08; ++i)
	{
		// Legacy save offset
		u8 tempValue0 = 0x820000
		for (u8 k = i; k < 0x01; --k)
			tempValue0 += 0x01
		tempValue0 *= 0x04
		
		u8 tempValue1 = System.loadPersistentData(tempValue0, stringformat("ExtraSlot_%d", i + 0x01), 0x04)	// Load Legacy data
		u32 tempValue2 = sharedmemory.xtrachar + i	// New save address
		
		// If there is a Legacy slot here
		if (tempValue1 > 0x00)
		{
			// Debug message
			ExtraChar.debugLog(stringformat("Detected Legacy Extra char on Slot #%d; Merged.", i + 0x01))
			
			// Save new data
			u8[tempValue2] = tempValue1
			ExtraChar.SaveExtraSlots()
			
			// Delete legacy data
			System.savePersistentData(tempValue0, stringformat("ExtraSlot_%d", i + 0x01), 0x00)
		}
	}
}

function void ExtraChar.SaveExtraSlots()
{
	SRAM.save(sharedmemory.xtrachar, 0x660, 0x08)
	System.savePersistentData(sharedmemory.xtrachar, "SRAM_Extraslots", 0x08)
}