On 06/19/2016 06:11 PM, Phil via Tacos wrote: > Can it be upgraded to tri-state input? Or is that what the space key > is for? :-) I note there are actually 4 symbols. 1, 0, newline (lever on left), and space-bar. _M -- kf4hcw Pete McNeil lifeatwarp9.com/kf4hcw