Hans, this site has some info. I just got one of them also, very neat.
http://web.wt.net/~damoore/oldcomp/cpq3/cpq3.html
Brian
P.S. I picked up an IBM 5291 Display Station yesterday complete with
manuals with a bunch of other computers/monitors for $5.00. Any idea what
would have fed it originally? Anyone in the Toronto area interested in it
for trade or $5.00?
Thanks.
Brian.
P.P.S. Sorry about the mailing list gaffe. I should have explained the
subscription process in English, I guess.
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http://members.xoom.com/T3C/
http://suite101.com/welcome.cfm/antique_computers
http://www.geocities.com/SiliconValley/Horizon/9107/