They came out of that custom built machine that had
all the GAPP cards
in it but right now they're not in anything. FWIW the 4853s were used in
the Zenith Z-100s. I had some of them in the two z-100s that I had. That's
were I got the docs for them from. I'm not sure but I think the two
SB-180s that I used to have also used 4853s.
Ahhh...I've got four of them myself, all installed in TRS-80
Model 2000's. The tech and maint. manuals for both variants are
included in the 2000's tech manual.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757