Date   : Sat, 25 Jun 2005 08:03:12 +0100
From   : Mike Howard <aixguru@...>
Subject: Re: BBC/B+ 64k/128k & Econet

Pete Turnbull wrote:
> On Jun 24 2005, 18:06, Mike Howard wrote:
>>I have a switchable BBC/B+. It has an Acorn card fitted and a switch to
>>select 64k or 128k (I've no idea if this is a standard set-up).
> 
> No, it's not.  But I've seen one or two others like that.
> 
>>One of the leads from the switch is soldered to pin 16 of IC88 (no chip is
>>present at IC88).
>>My question is this; Does anybody know, if fitting Econet to this B+ and 
>>therefore fitting a 74LS123 to IC88, would cause problems or would it
>>just be a case of re-soldering the lead to pin 16 of the 74LS123?
> 
> Pin 16 of an LS123 is just the +5V line, so it shouldn't cause any
> problems.  Probably just a convenient source of power, controlled by
> the switch, for the 64K upgrade board.

Thanks Peter, that is what I thought/hoped.

Regards,
-- 
Mike Howard                    aixguru at blueyonder dot co dot uk
Eccleston                       (Hotmail Reply-To is a spam trap)
UK