[COCO] versions. How many?

[Bruce W. Calkins]

"Tandy's Little Wonder,
The Color Computer
1980-1991"
By, F. G. Swygert, Published by FARNA Systems.

Is the closest to your description, no pictures though.

I counted 15 model numbers there.  Although several variations exist 
within some of those model numbers.

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 From the book and my own knowledge;
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CoCo 1 revision "A" apparently was the prototype.

There is little indication the "B" revision was released for sale.
(I seem to recall a rumor once of it's existence though)

"C" & "D" boards came in 4K and 16k with or without Extended Color 
Basic.  (26-3001, 26-3002)

"E" revision were sold in 16k and 32k with or without Extended Color 
Basic.  (26-3001, 26-3002)

The final CoCo 1 revision (Marked NC or not marked beyond the silk 
screen number beginning with 285, nicknamed "F" board) came in 16k or 
64k with or without Extended Color Basic.  (26-3002A, 26-3003A, 
26-3004A, 26-3005)

The first (American) CoCo 2 came in 16k and 64k with or without Extended 
Color Basic.  Rumors exist that there were 2 or 3 board variations. 
(26-3026, 26-3027)(with A or B suffixes?)

The Korean CoCo 2 came in three board variations.  Again 16k and 64k 
with or without Extended Color Basic.  (Some have expressed doubt that 
the satellite 64k memory upgrade existed.  I have had two with this 64k 
upgrade.)  (26-3134(A,B), 26-3136(A,B))

"Stability" was "achieved" with the CoCo 3.  Only one board version is 
known to exist.  128k was standard with Super Extended Color Basic. 
Several vendors including Radio Shack had 512k upgrade boards.  Disto 
had 512k, 1 and 2 Meg versions as well.  (26-3334)

This list does not address the various 230 Volt and PAL versions.
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RJRTTY at aol.com wrote:
> Is there a source that lists all versions of the coco and
> their RS numbers and pictures of them too?
> 
> Roy
> 



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