PS/2 loopback connector

Joined: Jun 16, 2005 Posts: 1

Is there a way to build a connector that fools a BIOS into thinking their is a keyboard where there isnt one. i am trying to do this for a Point of Sale register which doesnt need a keyboard in normal operation. I am also open to buying one if someone has a place that sells such things.

Thanks

-Jeff

External Since: Feb 12, 2004 Posts: 8

On Thu, 16 Jun 2005 18:37:58 -0400, jeffon wrote:

> Is there a way to build a connector that fools a BIOS into thinking
> their is a keyboard where there isnt one. i am trying to do this for a
> Point of Sale register which doesnt need a keyboard in normal operation.
> I am also open to buying one if someone has a place that sells such
> things.

You can buy them here, both hot-swap and non hot-swap versions.
<a style='text-decoration: underline;' href="http://www.vetra.com/Elimina2.htm" target="_blank">http://www.vetra.com/Elimina2.htm</a>

In many BIOS versions there is an option to bypass 'halt on keyboard
error'. If that's not available, building one to fool a BIOS would
probably need a microcontroller that speaks PS/2 - See
<a style='text-decoration: underline;' href="http://www.computer-engineering.org/ps2protocol/" target="_blank">http://www.computer-engineering.org/ps2protocol/</a>

Alternatively, if you don't need hot-swap, you could use the PCB
and cable from a cheap or old keyboard.