I couldn't get it working.

how to declare somthing as xdata?
in my headerfile (keil) the bits are defined as EEMEN_ , but if I put that underscore in my code too, it gives an error.

I did find another example on this site:

char eeprom_read(unsigned int addr)
{
char eeprom_data = 0;
eeprom_data = (*(char xdata *)addr);
return eeprom_data;
}

void eeprom_write(char data_value, unsigned int addr)
{
WMCON |= 0x10; // Set the EEMWE bit to start a write to EEPROM.
(*(char xdata *) addr) = data_value;
WMCON &= ~0x10; // Clear the EEMWE bit to finish write.
}

but that doesn't work too, the only thing it returns, is the address. and what's the function of that ~ ?

thanks for the example in assembler, but I can use c a little.