On Mon, 13 Aug 2012, allison wrote:
Yes it was though I think the Rainbow used the Z80 as
an IOT processor.
The video was CGA level not VGA. Doing VGA video makes finding
compatible monitors easier (CGA (9pin)went the way of the dodo). That
does not require you to do VGA level video.
You actually can get LCD displays that accept CGA (and MDA) signals but
they cost more than a typical VGA display.