Date   : Fri, 12 Jun 1992 08:44:34 +0100
From   : "Mik Davis" <davism@...>
Subject: Re: Screen memory

 >      "Mik Davis" <davism@...> writes:
 >      
 >      > I think I must have been asleep at the time not to realise that MODE 3
 >      > grabs nearly 20K of RAM.
 >      
 >      Which reminds me... how many of you out there realised that there is some
 >      hidden memory *after* the screen memory and *before* the ROM starts, in
 >      modes 3, 6 and 7? I haven't seen this in a magazine before, and I don't
 >      believe it is documented as such in the Advanced User Guide.
 >      
 >      Mode 7 is allocated exactly 1024 bytes for display but needs only 1000
 >      at a time (ie. 40*25 characters), so there are 24 bytes free from
 >      &7FE8-&7FFF.
 >      

  I thought that mode 7 used those 24 bytes. Didnt Richard (challenger) mention
this on Monochrome?


|         Michael Davis           |   If you can keep your head when all  |
|    davism@...                   |   around are losing theirs, you're    |
|_________________________________|   probably the executioner            |