View Single Post
Old 10-19-2007, 03:03 AM
Cappellanus Cappellanus is offline
Junior Member
Join Date: Jul 2007
Posts: 24

That modification on Eric Klein's machine is interesting because it is the first (and only?) modification known on a Kenbak-1. Common sense suggests that this should be an input or output, the only thing that a Kenbak-1 lacks to do "real work." We've probably all wondered how to make an input or output (of course, Grant's investigations show the light lines can be used, maybe with a low-pass filter.)

I seem to recall that Herbert Eisengruber (Nova Scotia) had some type of machine interfaced up to a Kenbak-1, but maybe I just dreamed this up. At one VCF meeting, in the pictures, I thought he had some later hardware that was hooked up to a kenbak-1, but now I can't find a source, and the pictures don't make that clear.

Look at this picture....
towards the bottom right of the picture is a photo showing a kenbak-1 with a later box on top of it. Was this a input/output interface? If anyone knows Herbert, maybe they could ask him. Herbert's machines came right out of a technical school, so I wouldn't expect them to have the modifications such as a privately owned machine could have attained.

In any case, maybe we'll never know details of why Erik's machine was modified, as a whole-big circuit board with lots of logic could have been interfaced into those few signals, and all that is long lost.

Oh, and Grant: I didn't get to the bank before they closed, so no money order. I'll definitely get it mailed by Saturday, priority mail. Don't give my kit away to anyone else!!!
Attached Images

Last edited by Grant Stockly; 09-10-2012 at 09:18 PM.
Reply With Quote