Date   : Thu, 11 Nov 2004 13:18:00 +0000 (GMT)
From   : Andrew W <a.weston2@...>
Subject: Re: SRAM

In <URL:news:local.misc> on Thu 11 Nov, Richard_Talbot-Watkins@... wrote:
> 
> 
> 
> 
> Andrew W wrote on 11/11/2004 00:58:50:
> 
> > I've been trying some SRAM routines from an old Beebug magazine. The
> > poke and 'pick' routines both use OSWORD 66. I'm trying these under
> > emulation so I'm not quite sure what is implemented. Could anybody
> > say what is this routine and where is it stored?
> 
> The sideways RAM utilities live in the 1770 DFS ROM on the B+/128 and
> Master.
> 
<snip>
> 
> More about this here:
> 
> http://acorn.riscos.com/documents/appnotes/016-030/030.ps
> 
Thanks, I'll  make a note of all that and the URL. I think this is what
BFS on Beebit must be implementing - the 1770DFS routines. In this case
how does a game like Exile manage to use SRAM on an otherwise
unexpanded BBC Micro? The only routine I know of in the OS is to read a
byte from paged ROM.


A.Weston
-- 
Staffordshire, UK of GB&NI.