XT/AT keyboard

Discussion in 'Retro & Arcade' started by @rt, Nov 5, 2015.

  1. @rt

    @rt Member

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    Hi Guys :)
    I have Googled a bit, and Wiki. It seems easy someone should know.
    Is the only difference between an XT and AT keyboard the number of keys?

    I’m interested in compatibility. I have a Windows IBM PS2 keyboard which is
    working fine with a 5 pin DIN interface XT/AT socket in vintage computer.
    All I did was chopped the PS2 connector and soldered a DIN connector matching the pins.
    http://www.kbdbabel.org/conn/kbd_connector_ps2.png

    So I’m wondering what actually happened when you switched the XT/AT switch
    underneath an old keyboard that came with he 5 pin DIN connector?
    Cheers, Art.
     
  2. Flamin Joe

    Flamin Joe Member

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    You know you could of simply just brought a PS/2 to AT Adaptor? :D

    The XT/AT switch essentially changes the communication between the keyboard and the PC. It's probably best explained here:

    http://ilkerf.tripod.com/c64tower/F_Keyboard_FAQ.html#KEYBOARDFAQ_021

    You can do AT to PS/2 (and vice versa) because they communicate the same way, but as you can see with the differences between XT and AT (and PS/2 for that matter), it's just not possible to simply convert it. The only reason XT/AT share the same plug would simply be convenience. There was no need for a different connector until PS/2 came along and also took on the Mouse.
     
  3. OP
    OP
    @rt

    @rt Member

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    Hi :) Thanks for the reply.

    I can assume the computer wants an AT keyboard then.

    I know they did exist, but wouldn’t have expected to find one now.
    Who’s going to buy them a bunch of Guys with Amigas? :D

    It's a junk keyboard specifically for use with the old computer so it doesn’t matter the PS2 plug got the chop.
    Seriously though thanks, I don’t really have to look into it any further.

    [​IMG]
     
    Last edited: Nov 6, 2015
  4. QuakeDude

    QuakeDude ooooh weeee ooooh

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    I have one right here :lol:

    [​IMG]
     
  5. zebu

    zebu Member

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  6. Flamin Joe

    Flamin Joe Member

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    You can still buy them on eBay. I had a quick look there are quite a few sellers.
     
  7. OP
    OP
    @rt

    @rt Member

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    This is cheaper! Plus I have access to a pallet bin of this keyboard :D
    Waiting for eBay don’t beat having it done yesterday :D

    [​IMG]
     
  8. zebu

    zebu Member

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    plus mad retro props for IBM branded keyboard :p
     
  9. OP
    OP
    @rt

    @rt Member

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    I did want a "real" brand, but probably considered a no-no with Amiga
    fans to stick an IBM accessory!
     
  10. /invariance\

    /invariance\ Member

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    Out of curiosity, whar is the part number of your board?
     
  11. OP
    OP
    @rt

    @rt Member

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    P/N: 89P8300.

    For style I’ll still look out for a more rectangular streamline one, but it works well.
     
  12. /invariance\

    /invariance\ Member

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    Thanks.
    When I read your op it was late at night and I got the plug it had and your conversion ass about and wondered what board it was with a 5pin din.

    Sleep clarified my confusion.
     
  13. OP
    OP
    @rt

    @rt Member

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    Nah.. It’s pretty modern recently obsoleted crap sent to recycling centre.. has Windows keys.
    All their stuff is about 5 or more years old, but not old enough to be anything retro.

    I got a D-Link external 56k modem too, also for the Amiga, for $5 so that was cool :)
     

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