OK, I see. For the "sg1000" driver this makes no sense at all because the keyboard is missing. For the SG-1000 (1K internal RAM)/SG-1000 II (2K internal RAM) exist a add-on called SK-1100 (keyboard) Maybe we should make a additional driver which support the SG-1000 + SK-1100 (Keyboard, Tape and Printer)? So we can use some specific BASIC cartridges.