Date   : Tue, 14 Jul 2009 17:26:52 +0100
From   : jumbos.bazzar@... (Mark Haysman)
Subject: BBC B ROMs with Tube Host

>I actually have to get one machine out later this evening, its has a
> 1770 controller and WE DDFS (I think it's 1.54T) , will plug in my 6502
> co-pro to see what happens. I do "think" it will work with this DFS
> though...

Yes, DDFS 1.54T has the Host Code.  It's mistakenly thought that the "T" 
means Tube code, but some earlier versions, such as 1.53 had it as well, the 
T seems to signify it's for use with the DDB3 board, and is also conmpatible 
with the Acorn board.

JGH has disassemblies for the host code on his site:

http://mdfs.net/Software/Tube/BBC/

Mark.