Date   : Mon, 29 Oct 2007 14:13:12 +0100
From   : anders.carlsson@... (Anders Carlsson)
Subject: Master boot-up help

Pete Turnbull wrote:

> 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.

Oh. I was having a Commodore moment. :-) But those 15XX drives of course 
have their FDC inside the floppy drive.

I don't think any pins were bent, and I got the computer to boot up with the 
Acorn 1770 DFS message. The data cable goes directly into the drive, no 
connector on the back side. At a later point I may disassemble it to see 
that it attaches to something. If it wasn't for shipping expenses, I could 
get another known good floppy drive just for comparison.

Regards

-- 
Anders Carlsson