Date   : Mon, 29 Oct 2007 12:31:49 +0000
From   : pete@... (Pete Turnbull)
Subject: Master boot-up help

On 28/10/2007 21:11, Anders Carlsson wrote:

> Back to my question, if the drive does not respond on a command from
> the BBC, could that be a damaged 6522 chip inside the computer or
> something similar?

The 6522s are normally socketed on a Beeb, and I think they are on a 
Master 128 as well, though it's a long time since I looked.   However, 
they don't have anything to do with the disk drives.  The 8271 is the 
floppy controller, or a 1770/1772 on a Master, and there are some other 
TTL and LSTTL chips associated with the interface.

-- 

Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York