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geekhack Community => Keyboards => Topic started by: obj-c on Sat, 05 March 2011, 12:07:30

Title: ps/1 and ps/2
Post by: obj-c on Sat, 05 March 2011, 12:07:30

what is the difference between these two types of ports?

Title: ps/1 and ps/2
Post by: rustybarnacle on Sat, 05 March 2011, 12:11:17

Ps2 you can find on modern hardware?

Title: ps/1 and ps/2
Post by: Surly73 on Sat, 05 March 2011, 12:32:55

I haven't checked any references, but having been a computer user back when PS2 was invented I'm not so sure there is a PS1 connector.  There was a PS/1 computer line from IBM, as well as a PS/2.  The connector launched on the PS/2 is foreverafter referred to as the "PS/2" connector.  I think it used to be called the "PS/2 style connector".

The connector is named for the computer it was first found on, it isn't a name which was originally given to the connector itself.  AFAIK.  So if I were to rephrase the answer the way some others here at GH: "The difference is that the PS2 connector exists".

Title: ps/1 and ps/2
Post by: keyb_gr on Sat, 05 March 2011, 15:48:56

Quote from: Surly73;305591

There was a PS/1 computer line from IBM, as well as a PS/2.  The connector launched on the PS/2 is foreverafter referred to as the "PS/2" connector.

This.

Before that, PC keyboards used 5-pin DIN connectors (easily adapted to PS/2 for anything that speaks at least the AT keyboard protocol), same as used for MIDI or older European audio components.