With my keyboard interface still incomplete I haven’t been able to do a full test of my Apple 1. However, I was able to enter the test program from the Apple 1 operations manual. The program ran just as expected. At this point I am waiting for my replacement ATMEGA8515 for my IIe interface to arrive from Jameco. I figured out that I had accidentally connected D6 to pin 7 on the keyboard socket which is 12V+. »
My effort to find the right keyboard for my Apple 1 was a long and relatively fruitless process. Since the original Apple 1 did not supply a keyboard, a variety of keyboards were used. The requirement is that the keyboard needs to provide an ASCII interface that you can wire into the Apple 1 keyboard socket. A common choice for this was a Datanetics keyboard. As it turns out, datanetics and every other variety of ASCII keyboards have become very tough to find. »