Date   : Thu, 05 Feb 2004 21:16:09 +0100 (GMT)
From   : Johan Heuseveldt <johan@...>
Subject: Re: [Econet] Circuit Diagram for the Issue 2 Econet Module

Hi Chris,

On Thu 05 Feb, Chris Johns wrote:
> 
> I'm after one - I've got one for the Issue 1 version but not for the
> issue 2 (ie. the one with the hardware collision detect).
> 
> I'm trying to see why my data isn't getting onto the wire - it's getting
> to the ADLC TxD pin but no further. I suspect the line driver.

Perhaps look at the older BBC drawing(s); the implementation there is the
same as later (final) ones, as used in the Master & Archimedes; they all have
hardware collision detection. Even the one for the A4000 is the same -
convinced by checking the parts on the PCB, although the board size
dimensions is different.

As I learned from (on this list) here a while back, the design is always the
same - implementation with software collision was only used temporarely. Only
the line drivers were changed to cheaper ones on the Master/Archi versions,
I think.

greetings,
Johan

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

  The best place is a Riscy place
 
"He taught us drawing, stretching, and fainting in coils."