I checked with my copy of Pete Keller's book, "The Cathode-Ray Tube
Technology, History and Applications". He says write-through capability was
added to the T4014 in 1978. And, "Color write-through was a further
improvement in 1981 that presented the overwritten information in a different
color than the stored information (which is green)."
Battlestar Galactica originally aired in Sept 1978, so the 4081 must have
been out the same year as the T4014, and thus my tour of Wilsonville must
have been around mid 1978.
Don
