Date   : Wed, 27 Jul 2005 15:23:19 +0200 (BST)
From   : Johan Heuseveldt <johan@...>
Subject: Re: Econet-Ethernet bridge

Hi Mark,

On Wed 27 Jul, Mark Usher wrote:

> Yes, I was going to suggest adding the clock circuitry aswell. This would
> make a lot of sense with power already being available for the unit, and
> people building a network from scratch may not already have a clock unit. A
> simple jumper select to set the clock speed or off would be easy enough.

You should also allow to set the duty cycle of the clock, also called
the mark/space ratio. First the Econet clock was a 50/50 clock ratio. But
this could cause some problems in later 68B54 series, caused by the clock
transition half way. I hope I understood correctly at the time of reading
about the issue.
Indeed, second generation clock boxes allow this setting, as well the
SJResearch Clock Box/Bridge. 

greetings,
Johan

-- 
Johan Heuseveldt <johan@...              >
  aka  waarland

  The best place is a Riscy place
 
A bird in the hand is safer than one overhead.