From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <2c6fc3d11230511490b3e967577699ff@plan9.bell-labs.com>
Date: Mon,  9 Jan 2006 00:27:48 -0500
From: jmk@plan9.bell-labs.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] serial reboot boxes
In-Reply-To: <9ab217670601082116kecc9b49r@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Topicbox-Message-UUID: d485c28c-ead0-11e9-9d60-3106f5b1d025

On Mon Jan  9 00:20:50 EST 2006, devon.odell@gmail.com wrote:
> ...
> You could use a parallel port to control more than 1 device. With
> output and ground, you could use a microcontroller (or probably some
> gates, but my EE skills suck) to determine which pins are set and have
> an 8 bit mask to control up to 255 devices, I think.
> ...
> --Devon

i think we decided on using 5 bits to select the device and
one bit as an enable. i don't remember if the other two bits
were used but 32 was more than enough for our little setup.

--jim