Yes it was though I think the Rainbow used the Z80 as
an IOT processor.
The video was CGA level
No it was not!. It was CGA (US TV, RS170) scan rates, but it was
_analogue_ RGB, with sung-on-green. It was not TTL levels like CGA.
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.
Actually, they are not hard to get in the UK, provided you don't mind
having to spearate the sunc from the green signal. Most TVs -- even
modern ones -- have at least one SCART socket with analogue RGB inpots,
and most TVs over here can hadnle US scan rates.
-tony