Date   : Fri, 08 Sep 2006 12:21:09 +0100
From   : "Ian Wolstenholme" <BBCMailingList@...>
Subject: Re: Tube File Copying

I don't think it's the same thing, all the values may be correct.
This is the terminating resistor in the Master AIV "Domesday"
SCSI interface which is a bit different than the Acorn host
adapter board.

Best wishes,




Ian

----- Original Message -----
From: Andrew Benham
To:  Ian Wolstenholme <BBCMailingList@...>
Cc:   bbc-micro@...
Sent:  Fri, 08 Sep 2006 10:31:09 +0100
Subject: Re: [BBC-Micro] Re: Tube File Copying

Ian Wolstenholme wrote:
> It's definitely a worry.  Does anybody know the correct type of 
> resistor pack used and how I tell what's in mine?

Assuming we're talking about the SCSI terminator resistor pack,
      http://www.scsita.org/aboutscsi/termTutorial.html
tells us they should be 330 ohms to ground and 220 ohms
to TERMPOWER.

And the Acorn Winchester Disc Service Manual (from
     http://members.aon.at/~musher/bbc/hardware.htm
) agrees.

-- 
Andrew Benham           adsb@...       
Southgate, London N14, United Kingdom

The gates in my computer are AND OR and NOT, not "Bill".