Author Topic: Strange Dumb Terminal Keyboard connector  (Read 2747 times)

aparsons

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Strange Dumb Terminal Keyboard connector
« on: January 26, 2013, 06:35:06 AM »
Hey guys,

There is this young fellow (14 years old) that likes to play around with old hardware. Anyway, he picked up an old Gentec GT 4000 Terminal.
However it doesn't have a keyboard. And I have never seen a keyboard with that type of connection.

Is it possible to make a converter to AT or PS/2?

Attached is a zip file with the pic in it.

Any help is appreciated.

Regards.

K_F

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Re: Strange Dumb Terminal Keyboard connector
« Reply #1 on: January 26, 2013, 07:43:13 AM »
That's a DIN6-270 or DIN7-270(earth conn at the top) connector.
270 being the angular spread of the pins.

They're actually not that old.. Pre-USB keyboard connectors used something similar.
These connectors are still in use and should be available from your local electronics store

Older PC Keyboard's might still work with this as they were standardised, but you'll have to check many hardware things

- Keyboard controller chip
- Terminal keyboard chips
- Terminal BIOS system
..etc

Also try get hold of some circuit diagrams/user docs for the terminal and older keyboards
 8)
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dedndave

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Re: Strange Dumb Terminal Keyboard connector
« Reply #2 on: January 26, 2013, 08:45:34 AM »
i seriously doubt that an ibm-compatible keyboard would
work with anything except an ibm-compatible computer
the hardware interface is somewhat unique - and differs between XT and AT types

the exception might be some manufacturer that designed
their keyboard to be ibm compatible due to parts availability
but, it may be that your terminal pre-dates the ibm pc   :P
i say that because - it's a terminal - lol

Van - i think a PS/2 connector has more pins   :P

it could be an RS-232 interface, in fact
another thought - maybe it's similar to a c-128/apple/atari keyboard

MichaelW

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Re: Strange Dumb Terminal Keyboard connector
« Reply #3 on: January 26, 2013, 05:10:48 PM »
The AT connector has 5 pins and the PS/2 has 6.
Well Microsoft, here’s another nice mess you’ve gotten us into.

dedndave

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Re: Strange Dumb Terminal Keyboard connector
« Reply #4 on: January 26, 2013, 07:26:24 PM »
just because something fits doesn't mean it will work
in fact, it may do harm
i would try to get the schematic for the terminal and/or the keyboard and go from there

anunitu

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Re: Strange Dumb Terminal Keyboard connector
« Reply #5 on: January 27, 2013, 02:38:48 AM »
Here is a link for finding out about most hardware.

http://www.hardwarebook.info/

And here is a link to download the book,might be in a help format.

http://electronics-lab.com/downloads/calculators/001/index.html

I have seen some PDF format ones as well.

There are pictures of the connectors that help if you are wondering about what you have.

hfheatherfox07

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Re: Strange Dumb Terminal Keyboard connector
« Reply #6 on: February 02, 2013, 05:39:57 AM »
There are places online that you can buy NOS ( New Old Stock )
This guy had a new old IBM keyboard
I bought from him before and was impressed with the item quality and fast shipping , and how he packed it!

Point is you can find almost anything on eBay and even request item once you know what you need !

http://www.ebay.com/itm/181056224032?redirect=mobile


P.S
I am posting of my phone , I hope the link I visible on PC :)
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