I finished the reproduction Digital Group Video Card PCB layout a few months ago. This summer, I’ve been busy with other projects, but I’ve finally ordered a batch of PCBs. I should have them in hand in another week or so. I have all components in hand or on order. I’ve found the 5 MhZ crystal is not exactly common. I currently have a few on backorder at Mouser. Expected ship date is early December, so I may not be able to fully check out this card for a while.

I don’t expect the software to be very difficult, as the hardware interface is very basic. If you want to change any characters or do anything like scrolling, it looks like you need to write out the whole page of display data. The easiest thing might be to keep a mirror of video memory in main memory and write out the whole thing anytime that there is a change.