29 Jul
2006
29 Jul
'06
10:42 a.m.
When I first used my SWTP TV Typewriter, I adapted a keyboard from a piece
of (IIRC) RCA gear (it may have been Spectra 70 related). The original TVT
keyboard was a piece of junk.
Output was EBCDIC and encoding was done with a diode matrix and some DTL.
I was able to rework the encoding matrix so that the keyboard produced
mostly ASCII. It was a wonderful keyboard--made by George Risk and had
individual pressure-calibrated sealed reed switches for the keys (function
keys were set to have a higher activation pressure than alphanumerics). It
was enclosed in a diecast housing.
I wish I would have hung onto it--it was a great keyboard. They don't
build 'em like that anymore.
Cheers,
Chuck