Date   : Thu, 28 Jul 2005 20:26:10 +0200 (BST)
From   : Johan Heuseveldt <johan@...>
Subject: Re: Econet-Ethernet bridge

Hi,

On Thu 28 Jul, Jules Richardson wrote:
> On Thu, 2005-07-28 at 12:33 +0000, Jules Richardson wrote:
> > > Has anybody got the circuit for Acorn's Econet-Econet Bridge (one on
> > > ebay  at the moment) - what's in there, and how does that manage it?
> > 
> > I've got the hardware; if nothing else I could grab some photos
> > (probably not until tomorrow). I seem to remember it's a 6502-based
> > board in there, just with two lots of Econet interface circuitry.
> > Actually I need to photograph it anyway and back up the ROMs, so it's a
> > good excuse...
> 
> I just dug the box out of the cupboard. It's nice and elegant inside.
> Small board containing a 6502, CPU clock, 8KB ROM, 8KB static RAM, pair
> of 68B54 chips, line drivers/receivers, and about 6 TTL chips for bus
> buffering / address decoding. That's it. Single 5V power supply.
> 
> Will grab some photos ASAP...

It should be possible to extent the RAM to 32K. Are there 3 empty
sockets? There are quite a few jumpers on board to configure that. 


greetings,
Johan

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

  The best place is a Riscy place
 
Any wire cut to specified length will be too short.