Date   : Thu, 14 Feb 2008 20:13:16 +1100
From   : msmcdoug@... (Mark McDougall)
Subject: Model A (16K) RAM memory map?

Sprow wrote:

> Simple:
>  write 0 to &0000
>  write 0 to &4000
>  write 1 to &0000
>  read from &4000, if it's 1 then there's 16k of RAM

This this is a known fact, or speculation on your part? i.e. do you know if
the BBC is (a) mirrored and (b) this is how the MOS ROM actually does it?

TIA
Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"