Date   : Sun, 15 Jan 2017 20:41:24 -0500
From   : lists@... (Stephen Harris)
Subject: Asking for directions in setting mode 7 screen to

On Mon, Jan 16, 2017 at 01:32:14AM +0000, nicola giacobbe wrote:
> I have many times found reference to the possibility to set the MODE 7
starting address to &3C00 even on a BBC B but I could not collect any reference
to example code and/or any theoretical info.

This thread might help
  http://stardot.org.uk/forums/viewtopic.php?f=2&t=12029&p=152532

In particular
  http://stardot.org.uk/forums/viewtopic.php?f=2&t=12029&p=152532#p152532
which hints that R12/R13 might work on a B (but not on a Master) to set
the base address to 3C00

-- 

rgds
Stephen