Date   : Sat, 06 Nov 2004 23:18:07 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Which SidewayROM-board for the BBC?

"janssenp" <janssenp@...> wrote:
> The most known SidewayROM-boards are from Watford, ATPL and Solidisk I
 
and Aries.
 
> believe. I have heard that they all, except the ATPL-board, make the
> user-port unusable, or at least have a negative effect on some other
> functions/ports of the BBC. Is this true?  If so, are there, beside the
 
No, not true, and would make a sideways RAM board useless if it did so.
 
I have used and programmed with Aries B12, Aries B32, Watford-12,
Watford-13, ATPL and Solidisk boards. None of them interfer with the user
port in any way whatsoever.
 
As far as the BBC is concerned, there are lots of ROM slots instead of
just four. Some of them also implement a WRITE paging register. For
instance, on the Watford boards, writing any value to &FF00+r sends any
writes to &8000-&BFFF to the specified ROM number r.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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