Date   : Fri, 19 Oct 2007 18:14:04 +0100
From   : julesrichardsonuk@... (Jules Richardson)
Subject: 12 kB Sideways RAM in a B+?

Daniel Beardsmore wrote:
> The manual confirms it -- the B+ has 12 kB Sideways RAM. It's not enough to
> host a ROM image, being 4 kB short of one page, so why did Acorn only fit 12
> kB instead of 16?

The ACW service manual suggests it's due to the shadow screen mode - that 
takes a maximum of 20KB, leaving 12KB left over for general use (on top of the 
32KB of 'normal' RAM)

Afraid I don't have any other B+ docs here, though :(

cheers

Jules