deskthority

2b - why do you care? You won't be mass-producing them so shoehorning into 5267 is not a realistic perspective, and otherwise - why bother?
4 - why it's even a separate item?
5 - good luck. Your main problem will be fighting EMI.
6 - why? Building firmware on linux is pointless as you can't change ...

I'm working on restoring and converting a Xerox Diablo 1660 keyboard.
it has ITW/Cortron ferrite core switches.
The board is well documented in manuals and patents.

Upon initial power-up one of the caps smoked, and took out several 74 series ICs on the board.
After desoldering several chips and ...