Date   : Sat, 03 Dec 2005 12:02:28 +0000
From   : Andy Armstrong <andy@...>
Subject: Re: ?Shadow RAM point

On 3 Dec 2005, at 04:45, Peter Craven wrote:
> If have Shadow RAM on BBC/ Master as being displayed, what happens  
> if you are entering a BASIC program that goes over &3000, as the  
> computer would have to swap the 'Non-Shadow' User memory back in to  
> store the program?????

It works the other way - it only pages in the shadow ram to write to  
the screen - 'normally' memory is usually mapped all the way up to  
&8000. The display hardware access the shadow memory independently of  
the CPU.

-- 
Andy Armstrong, hexten.net