Coco variations (was: Proper name for Tandy Color Computer?

[Tony Duell]

> 
> IIRC, Tandy also made a "Vidoetext" terminal that was in a white version
> of the Coco 1 case.

I've always wondered what was inside that Videotex machine. I've not seen 
the service manual on the web anywhere, and I've never seen any info in 
print. Is it a modified CoCo? Does it even have a 6809 + 6883 (SAM) + 
6847 (VDG) in the middile of it?

-tony