As far as I know there's no connection to existing video circuitry. The video output is independent so you need a separate monitor, or switcher, which was a little inconvenient so I never really did much with mine. It should be trivial to re-create this board and/or update it to take a single ram chip. My desoldering skills are a little rusty, but I'd be willing to remove all the components and scan the PCB if that would help you recreate the schematic.dave wrote: ↑Thu May 04, 2017 3:17 pm Yes, that's the Mittendorf board. Thanks for the nice photos. If someone were to trace out the schematic, I could write something up about it, since I did a hi-res mod for my C2 that I think would be similar enough.
I imagine this circuit borrows signals from the video timing chain to sequence addresses to 1 port of a 2-port RAM; a data latch; and a shift register whose output can be OR'd with the OSI video shift register.
It would be great to reproduce one of these. Any chance of working with one of you to get one of these boards scanned?
Steve