> Alas I have no idea what they are or if there is hope of using them. Megatek built graphics terminals and I think plotters that were used in CAD shops. Prime used them with some of their CAD offerings. Megatek also did boards for at least DG, -11, Modcomp systems, maybe others. In fact, some of the terminals may be based on Nova processors. The Megagraphic line mentions a bit-slice custom processor inside.
The Whizzard line seems to interface via RS-232, but the Megagraphic family brochures say they had pio/dma interfaces for a variety of minicomputers, so are probably closer to matching your board set. You'd be looking for the relevant terminal, I'd think. De