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This is a mirror of 4/2000 post from


"ZRT-80 CRT terminal board - manual, schematics, and rom images (manufactured by Digital Research Computers)."

In the early days, most CP/M computers (S100 and single-board) required a video terminal (video monitor / keyboard combination). The 'terminal' attached to the computer via a serial port.

The ZRT-80 was a 'budget' terminal - a kit consisting of a single pcb to which one added a parallel ascii keyboard and video monitor. As many were sold, they are likely to turn up on the surplus market. I thought it would be a good idea to preserve the manual/schematics etc for anyone needing it.

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