Date : Sun, 26 Jul 2009 18:50:06 +0100
From : michael.firth@... (Firth,MJC,Michael,DMJ R)
Subject: Master ethernet upgrade
I did have an e-mail exchange with the creator when I was looking at creating
one of those to fit an Econet interface to the Beeb.
That confirmed that as well as the wobbly connections, the original design
had the D+ and D- pins swapped, meaning it wouldn't work without either a
modified uplink cable, or a mod to the board.
I got most of the CAD work done towards recreating the design, but decided
it would be simpler and more reliable to remove the 68B54 from the Master
module, and fit the Econet interface in the standard way.
Regards
Michael
-----Original Message-----
From: Rob <robert@...>
Sent: 26 July 2009 13:02
To: bbc-micro@... <bbc-micro@...>
Subject: Re: [BBC-Micro] Master ethernet upgrade
Was just googling about for something else, and found this:
http://www.tea-with.me.uk/index.php?cid=2340
looks like all the original design info, etc, for the adapter board in
Ian's beeb. Project Document confirms that it's the cheap ic sockets
that are to blame for the unreliability..
On 23/07/2009, Ian Wolstenholme <bbcmailinglist@...> wrote:
> The Econet interface in that machine doesn't actually work. It appeared
> to be a bit of home-made unfinished business when it was sold to me a
> few years back. Sometimes the Beeb won't power up at all, sometimes
> you get a different station number, all depending on where you apply
> pressure on the board that plugs into the motherboard. Even when it
> works, unfortunately it won't connect to the network, just gives No clock
> or Net error or Line jammed. I don't recall it stopping the rest of the
> network, but I think I've only tested it in fairly isolated circumstances.
>
> That's not to say that something similar couldn't be used to plug the
> Master Ethernet Module (which is totally brilliant by the way and solves
> all my file transfer problems) into a BBC B.
>
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