Thanks all you asm programers out there that helped me with that on/off program. I have one problem though. I recently upgraded to FAT32 and now every DOS program, and many windows programs, don't work. It doesn't register DOS *.exe and *.bat as actual files(?). So I was wondering if somebody could make me a prog, in 83p, to turn off my calc. Thanks: Phelan 'Amen' Wolf