Date   : Sat, 01 Sep 2007 16:02:10 +0200 (BST)
From   : johan@... (Johan Heuseveldt)
Subject: Econet test rig (203,012)

Hi Jules,

On Tue 21 Aug, Jules Richardson wrote:

> I've been down in London today dropping off a Philips minicomputer for 
> someone, but I came away with the following (hand drawn) schematics:
> 
>    ARM Eval box
>    Microwriter MW4
>    Fischer Technik robotics interface
>    Morley Teletext decoder
>    Econet bridge

I've been doing that in the past myself. Perhaps a few of you
remember.
Most of it is straightforward, but I had some trouble around the
network connections. After downloading the datasheets about the line
driver 26LS30, I was able to figure out some more details, but some
of the connections between the two networks are yet a bigger mystery
to me. These last attempts took more time than the investigations for
the main 90% of it.

It can be found - this time properly zipped - in drafts, together with
the ROM dump and the first automated disassembly.
But some other input on that particular part of the schematics is very
welcome to me!

  <http://www.waaralnd.demon.nl/EcoBrdg.zip>

I would like a copy of the one you came across, and see if I am
completely wrong for that specific part.

>    Econet test rig (203,012)
>    Econet module (Acorn, 0259,200)
>    Econet module (Acorn, 0243,020)
>    Cheese wedge linear PSU
>    Cheese wedge SMPSU
>    SJ clock box
>    ABC 2xx (a bit more comprehensive than the service manual ones)

A few more are of interest to me.

Have you put them somewhere, or should/can I email you privately?



Greetings,
Johan

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

  The best place is a Riscy place
 
Clothes maketh the man. Naked people have little
or no influence on society. - Mark Twain