Two birds with one stone

A project log for Gigatron TTL microcomputer

Just because! A home computer without microprocessor

Marcel van KervinckMarcel van Kervinck 05/21/2017 at 16:012 Comments

An Atari joystick will do as input device for the games I have in mind. But the breadboard computer has the potential to run a BASIC. For that, keyboard input would be great. USB is out of the question, and even PS/2 looks a bit involved. A simple matrix keyboard would be a better starting point.

Also, at some point I'll need an enclosure to keep dust out and to be able to bring it to places.

Today, I might have stumbled upon the solution for both problems.

[ Edit: to the millions of voices that suddenly cried out in terror: it had a broken PLA chip ]


Dr. Cockroach wrote 05/22/2017 at 06:39 point

Glad to hear that, I was going to cry out " OH Noooooo" :-) That will make a great data entry keyboard for this build :-)

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Marcel van Kervinck wrote 05/22/2017 at 20:40 point

Indeed it would. I haven't yet figured out where to hook it up, as all my output lines are in use. I think I need at least two outputs to drive a shift register. First mission is to get some text on the screen though :)

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