Pat There's a hint in one of the web pages I found - trying to "colour" the 2260 - that the 2250 came first - for the engineers - and the 2260 was a later development - for business - based on some aspects of 2250 technology.
I tried to find the web page where I think I found this "hint" and I think I did but the IBM webmaster seems to be getting in the way - just in the last few days? ( www.research.ibm.com/journal/rd/443/wisnieff.pdf ) Anyhow you may have better luck accessing this "Journal of Research and Development" article. I found what I think is similar text in the following: http://www.strak.se/AdamStrak_2B5234_Essay_20050520.pdf Finally, incidentally, trying to find this web page again, I found a colour picture of a 2260 - and another of a 2250 - with *green* characters! http://www.nfrpartners.com/comphistory/ Chris Mason ----- Original Message ----- From: "Patrick O'Keefe" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Friday, 01 September, 2006 8:45 PM Subject: Re: >27x132? > On Fri, 1 Sep 2006 10:15:19 +0200, Chris Mason <[EMAIL PROTECTED]> > wrote: > > >... > >I did receive conformation that the 2260 is closely related to the 2250 > >which appears to have come first, 2250: 1964, 2260: 1965. I actually saw a > >2250-like display being used as a system console at the IBM Santa Teresa > >labs. I'm pretty sure the characters were orange - and were somewhat > >distorted because - I believe I recall - they had to be rendered from > short > >straight lines. > >... > > Chris, are you sure about the 2260 / 2250 relationship? I vaguely remember > the 2260 looking pretty much like a 3270-ish device. I definitely > remember it had a fixed character generation capability. The control unit > had core plains as part of the character generation mechanism where each > pixel was a core. (You could see the character shapes by looking at the > core plain uin the control unit.) > > The 2250 was a vectored display device where characters were drawn. It > had a pretty interesting high-level geometry-based programming language > for drawing. I think it's main intended purpose was for CAD/CAM stuff > but there was a console emulator in it. Part of that console support > had a last-gasp routine for processor checks in the CPU. It would > display RUN SEREP in big block letters. > > Pat O'Keefe ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
