parallel keyboard gizmos
Here is a popouri of parallel keyboard projects that I have been involved with designing.
Not shown
A simple single chip AVR PS/2 to parallel keyboard adapter that I forgot about when I assembled the items for this picture.
At top is:
A reproduction Datanetics keyboard
At bottom, from left to right…
Home etched/prototype PS/2 to parallel keyboard adapter
Production PS/2 parallel keyboard adapter configured for Apple 1/Mimeo
Production PS/2 parallel keyboard adapter configured for Apple ][. The latest version firmware can also be used with other vintage computers
Home made Apple ][ keyboard to Apple 1/Mimeo motherboard dongle with clear switch – based on schematic at Wendel Sander’s Apple 1 site
Production Vintage Micros Apple ][ keyboard to Apple 1/Mimeo motherboard dongle with clear switch. Similar to home made one
Corey Cohen’s parallel keyboard multiplexor. Automatically accepts and switches input from two different parallel keyboards to a single destination motherboard.
Not shown are a number of projects that I have started, but not completed (yet)
Datanetics replacement using modern components
MM5740 replacement using modern micro controller
And then there are the projects that never got past investigation stage.
ADB bus to parallel adapter
PS/2 Apple IIe keyboard adapter
It’s really hard to imagine that I have spent so much time mucking with simple parallel ASCII keyboard technology.
