Hello, it follows a refined version where thanks to Seth and his extensive x86 assembly knowledge my initial assumption about how Apple does byte writes could be falsified. It appears that byte writes only failed because the index protocol was not correctly followed in the read functions. Cheers, Bernhard -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html