A500 keyboard membrane - pc kb adapter built (help)

[DrDekker]

Try building 'IBMKey25' instead - this definitely works. See - Keyboard Adapter

For programming the PIC16F84 I built a programmer based on the 'COM84' design - the simplest.  Only suitable for old AT style motherboards as newer ATX (or laptops) can't deliver enough juice to the serial port.  See -  COM84

PM me if you need any help or more info.