Path: nntp1.ba.best.com!inwap From: inwap@best.com (Joe Smith) Newsgroups: alt.sys.pdp10 Subject: Re: Tymshare 26XL Date: 1 Oct 2000 10:11:33 GMT Organization: Chez Inwap Lines: 22 Message-ID: <8r72kl$mku$1@nntp1.ba.best.com> References: <851yy2c2ut.fsf@junk.nocrew.org> NNTP-Posting-Host: shell3.ba.best.com X-Trace: nntp1.ba.best.com 970395093 23198 206.184.139.134 (1 Oct 2000 10:11:33 GMT) X-Complaints-To: abuse@best.com NNTP-Posting-Date: 1 Oct 2000 10:11:33 GMT Xref: nntp1.ba.best.com alt.sys.pdp10:1405 In article <851yy2c2ut.fsf@junk.nocrew.org>, lars brinkhoff wrote: >The most obscure PDP-10 clone, even more so than the MAXC, seems to be >Tymshare 26XL. I've found exactly one reference: > http://www.inwap.com/pdp10/usenet/poole > >Was there really such a beast? Was F4 = 26XL? About 10 of them were built. Four were installed in-house at Tymshare's facilities on Bubb Road or Valley Green Drive in Cupertino, the rest were installed by Doug Engelbart (http://www.bootstrap.org) at an Air Force base back East (Wright-Patterson? Memory is hazy) as part of the OFFICE and AUGMENTATION projects. The prototypes (F4) used a custom board plugged into an Apple ][ for loading the microcode and diagnostics. The production models (26XL, circa 1986) used an IBM PC-XT for that purpose. None of them were sold to outside customers. -Joe -- See http://www.inwap.com/ for PDP-10 and "ReBoot" pages.