Apple II Plus keyboard - strange output on Mimeo
So I recently finished my Mimeo-1 (so excited!), and other than some bad 7400s, everything has gone smoothly. I'm now at the stage to connect a keyboard, and have an Apple-II Plus keyboard that I thought would do the job. However, the only keys that output what they should are Reset and Space, and a few of the number and punctuation keys. Nothing will display letters.
1234567890:- maps to 10145458908-
QWERTYUIOP maps to 15%0495)-0
I checked the daughter board and saw that the encoder is an NKBD-931 8003UX which I'm guessing is the problem as I've only seen people use KR3600 or MM5740.
I don't know much about these though so I'm not sure if the keyboard is at fault or if its something on the Apple-1 side.
If the problem is the NKBD-931 8003UX, could I just swap that with a KR3600 chip?
Thanks for any help guys!
(I attached some pictures of the encoder board, and my finished Mimeo-1 for posterity)
|encoder board.jpg||720.74 KB|
|Mimeo setup.jpg||291.66 KB|