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Author Topic: RJ45 to ps/2  (Read 4893 times)

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Offline Infinite north

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RJ45 to ps/2
« on: Fri, 23 July 2010, 21:13:32 »
Does anyone know the wire layout for RJ45 to ps/2? I am using an old ps/2 cord and the wiring on that end is easy enough but I am not sure where to put what for the RJ45 end.
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Offline Superfluous Parentheses

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RJ45 to ps/2
« Reply #1 on: Fri, 23 July 2010, 21:40:53 »
Quote from: Infinite north;205834
Does anyone know the wire layout for RJ45 to ps/2? I am using an old ps/2 cord and the wiring on that end is easy enough but I am not sure where to put what for the RJ45 end.

Are you talking about an IBM Model M (SDL) connector (which AFAIK are NOT RJ45 but look similar) or something else?

I don't think there are established standards for these kinds of connectors. Model M types of different sub-models are generally interchangeable but other manufacturers may or may not use completely different wiring. So, well, please be more precise.

edit: RJ45 connectors have a single tab on the top, while model M connectors have a tab on each side.
« Last Edit: Fri, 23 July 2010, 21:46:33 by Superfluous Parentheses »
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Current collection: HHKB Pro 2 black on black, HHKB Pro 2 white/grey blank, [strike]Dell AT101W[/strike] (sold to SirClickAlot), 1992 Model M, Key Tronic Ergoforce KT 2001, BTC 5100 C. Dead boards: MS Natural Elite, MS Natural 4000.

Offline Infinite north

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RJ45 to ps/2
« Reply #2 on: Fri, 23 July 2010, 23:24:58 »
I am talking like a cat5/6 connector. is there are any known standard for this conversion or am I just going to have to play with it? I picked up an Access Is board without a cable.
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Offline Findecanor

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RJ45 to ps/2
« Reply #3 on: Sat, 24 July 2010, 03:23:12 »
RJ45 is the name of a telephone standard that uses a 8P2C connector, but I suppose that your connector has more than two connected wires.
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Offline Stone

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RJ45 to ps/2
« Reply #4 on: Sat, 24 July 2010, 05:55:12 »
Are you sure the board puts out PS/2 compatible serial signals? If not you'll need something like a kbdbabel converter, not a simple wire->wire convertor. You should be able to look up its datasheet here.

There are a load of VT220 terminal keyboards at my work which I've had my eye on in the past (nice and clicky!) but they all use a unique protocol over a telephone-style connector.

Stone
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Offline ch_123

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RJ45 to ps/2
« Reply #5 on: Sat, 24 July 2010, 06:13:33 »
Quote from: Stone;205902
There are a load of VT220 terminal keyboards at my work which I've had my eye on in the past (nice and clicky!) but they all use a unique protocol over a telephone-style connector.


Must be clones. The original DEC ones are the single worst keyboard to be unleashed on mankind.
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Offline Infinite north

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RJ45 to ps/2
« Reply #6 on: Sun, 25 July 2010, 17:07:38 »
I have laid out how the wires connect to the port keyboard side, but I am still at a loss as to what is what. the only wire that I am sure of is the ground (labeled scrn) but it looks like it shares a connection with the other black wire.

I flipped the bottom image so they line up the same.


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