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Re: FS/FT: Two PDP-8 Omnibus Boards

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  • joshbensadon
    ... I noticed it uses a 2017 Uart chip. I am guessing the 8017 chips I ve seen around are future relatives of the 2017?
    Message 1 of 6 , Mar 22, 2013
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      > --- In midatlanticretro@yahoogroups.com, Dave McGuire <Mcguire@> wrote:
      > >
      > > On 03/20/2013 08:22 PM, Systems Glitch wrote:
      > > > These two came in a recent purchase:
      > > >
      > > > http://www.glitchwrks.com/temp/pdp8serial.jpg
      > > > http://www.glitchwrks.com/temp/hexexpander.jpg
      > > >

      I noticed it uses a 2017 Uart chip. I am guessing the 8017 chips I've seen around are future relatives of the 2017?

      :)J
    • David Gesswein
      ... Traffic is low enough that probably doesn t need to go off list. Its for PDP-8/A. They are hex wide.
      Message 2 of 6 , Mar 23, 2013
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        On Sat, Mar 23, 2013 at 03:56:26AM -0000, s100doctor wrote:
        > I'm curious about the
        > hex expander, as my Omnibus 8 is quad width. Maybe a few of us can discuss
        > this board offline,
        >
        Traffic is low enough that probably doesn't need to go off list.

        Its for PDP-8/A. They are hex wide.
        http://technology.niagarac.on.ca/people/mcsele/images/PDP8A-Cards.jpg
        I assume it was to allow connection of two chassis together to get more
        slots. Without the second board it has limited use.
      • David Gesswein
        ... 2017 uses +5 and -12. 8017 is 5V only version of 2017.
        Message 3 of 6 , Mar 23, 2013
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          On Sat, Mar 23, 2013 at 04:05:39AM -0000, joshbensadon wrote:
          > > --- In midatlanticretro@yahoogroups.com, Dave McGuire <Mcguire@> wrote:
          > > >
          > > > On 03/20/2013 08:22 PM, Systems Glitch wrote:
          > > > > These two came in a recent purchase:
          > > > >
          > > > > http://www.glitchwrks.com/temp/pdp8serial.jpg
          > > > > http://www.glitchwrks.com/temp/hexexpander.jpg
          > > > >
          >
          > I noticed it uses a 2017 Uart chip. I am guessing the 8017 chips I've
          > seen around are future relatives of the 2017?
          >
          2017 uses +5 and -12. 8017 is 5V only version of 2017.
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