Re: DEC Keyboard Question

From: Christoph Gartmann (gartmann_at_non.immunbio.mpg.de.sens)
Date: 01/26/05 

Date: Wed, 26 Jan 2005 15:58:58 +0000 (UTC)

In article <tTNJd.6603$wy5.240@news.cpqcorp.net>, "FredK" <fred.nospam@nospam.dec.com> writes:
>The "default" is a PC-style KB. To get the driver to handle the KB as a
>LK411 there is an obscure handshake where the driver sends certain commands
>that will return "error" characters on a standard KB, and return something
>else on an LK411 (the LK450 has a subtle variation on this as well).

Ok, I see.

>Plugging in a KB (and it's powerup) causes the KB to send 0xAA to the system,
>which causes the driver to start this handshake. The generic problem with
>pass-thru switches is that the power up only gets sent to one system (or
>none, if the KVM is supplying power all the time).

In my case the KVM is supplying power all the time.

>VMS will poll the KB when the driver is reset to force a powerup sequence
>as well. But if no KB is there, the sequence may never complete.

So if I could tell the KVM to send 0xAA to the Alpha this should force the
Alpha to start the keyboard negotiation?

Or is it possible to "tell" a LK411 to genereate 0xAA via some key combination?

Regards,
   Christoph Gartmann 

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