we are trying to connect an Apple ][ Europlus keyboard to our Apple 1, following the pdf made by Wendell Sanders in 2010 ("Using Apple II Keyboard for Apple 1")...
We connected everything, we cut the right traces, made the jumpers etc...
The keyboard turn on, light's on, clear screen (REPT) works, ctrl-reset works... but keys act weird!
Here's what we obtain:
Key I press (space) what appears on screen
1 0 (means: I press 1, I read 0 on screen)
2 2 (...etc)
As you can see, some keys are correct, some are not
We changed every TTL IC on the keyboard (7400, 7404, 555) but no way. Also changed the 6520, same result. Double checked any connection almost 20 times!
We also swapped the 331-0931-B chip from a working APPLE 2 and the result is exactly the same, so we're sure this keyboard encoder is working.
Any hint? help please!
PS where can I find the 128 bytes ASCII table used in APPLE 1? I can't find it anywhere - maybe checking the scancodes in binary I can trace something (e.g. some lines connected togheter somewhere?)