Re: [chat] ps2 loopback hack

[Jan Schmidt <thaytan@xxxxxxxxxxxxxx>]

Detection of a keyboard is done by communicating with the processor in the
keyboard over the serial line of the cable. In order to be detected, the
keyboard indicates a status to the bios that it has self tested etc. To fool
the bios, you'd need a little processor.... doesn't need to be particularly
powerful, since it just has to tell the computer it is there. A cheap PIC
should do it, but you'll have to write the software. 

Alternatively, Jamie Honan demonstrated his Atmel AVR based keyboard replacement
which attaches an LCD screen to the keyboard port, and that code (which does
the keyboard initialisation communications) is already written and debugged,
and the AVR processor is not too expensive, right Jamie?

J.

<quote who="David Kempe">

> I have this compaq Ipaq desktop machine, and i need to disable it from
> worrying about the keyboard on boot. Its a demo machine to accompany a
> travelling salesguy and he doesnt want to lug a keyboard around. There is no
> option in the bios to tell it not to worry about a keyboard, so I was
> wondering is there some sort of loopback plug you can get? how would i make
> one?
>

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