[Coco] Conversion of CGA to analog RGB for CoCo III

[Marty Goodman]

Dear Roy Justus,

Congratulations on your successful conversion of two CGA monitors to CoCo
III - compatible analog RGB!   I did two or three such conversions back in
the mid 1980's, myself.  All worked well, and at least one I accomplished
without a factory schematic diagram, doing just as you did, just tracing the
video circuitry.  Your report brings back to me happy memories!

The only "problem" with this approach (apart from a mild amount of
tediousness) is that CGA monitors, themselves, are getting as rare as hen's
teeth now, nearly 4 years into the 21st century!

Cheers!

---marty

(marty goodman, formerly of CoCo Consultations)