Date   : Tue, 01 Jan 2008 12:46:30 +0100
From   : steven.bass@... (Steven Bass)
Subject: Technomatic Disaster

Ian
In message <73441632BE2C4E0EBD9646E76F6DD288.MAI@...>
          "Ian Wolstenholme" <bbcmailinglist@...> wrote:

> It wouldn't be Christmas at the BeebMaster household without some
> great disaster befalling one of my prized items.  This year it's the
> Technomatic Winchester Disc.  I was using it very happily on Friday afternoon
> and left it for about an hour and when I came back I got no response.  I
> turned it off and on again and any number of *ADFS, *MOUNT etc. commands
> just go straight to the floppy drive.
> 
> I have taken it to pieces and tested it as much as I can.  The disc
> itself spins
> up OK and the Adaptec controller board appears to be working - the LED blinks
> in concert with the drive light during initialisation.  The Akhter
> host adapter
> board reports normal seeming voltages when tested with a multimeter.  I've
> tried a different Winchester disc with no success and also a different ribbon
> cable to the 1MHz bus of the Beeb as the original cable did have a bit of
> damage which I was hoping was the problem.
> 
> Can anybody suggest anything else?
> 
> Best wishes,
> 
> 
> 
> Ian
The fact that *MOUNT 0 goes to the floppy drive suggests that the Host 
Adapter is not being 'seen' by the BEEB.

See if you can write and read to the registers at &FC40 - &FC47.  If 
not check the cable to the 1 MHz bus and use a known working Host 
Adapter from one of your other Winchester setups.

Let us all know how you get on.


-- 
Steve Bass