Date   : Sun, 21 Feb 2016 13:46:43 +0000
From   : jgh@... (J.G.Harston)
Subject: Fwd: BBC B+ 128 and 64k models

Wookiee wrote:
> I know if you burn a EPROM with OS1.2 & BASIC and stick that in a B+ it
> behaves just like a standard Beeb but how does a standard Beeb cope if
> you put the B+ OS in it ?

Works perfectly happily, but if you select a shadow screen mode the 
system puts HIMEM at &8000, but the screen memory is still user memory. 
For example:

> MODE 135
> PRINT ~HIMEM
       8000
> !&7C00=-1
(screen memory gets poked into)

-- 
J.G.Harston - jgh@...      - mdfs.net/jgh