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Re: [midatlanticretro] Re: FS/FT: Two PDP-8 Omnibus Boards

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  • 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 1 of 6 , Mar 23, 2013
      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 2 of 6 , Mar 23, 2013
        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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