Date   : Wed, 24 Dec 1997 07:26:47 +0000
From   : Mike Tomlinson <jasper@...>
Subject: Re: BBC SCSI

In article <1997122200362666447@...>, Mike Mallett
<mike.mallett@...> writes

<snip>

(from quoted email)

>  SCSI drives do in fact work direct to 
>a BBC Host Adapter, my set-up is exactly this.

Now that is interesting.  Presumably in the light of comments in other
threads, the drive would have to be set to ID0 and have parity disabled.

As the host interface was fairly simple, it would be a cheap and
attractive way to add a SCSI drive to a Beeb - all you'd need would be
the adapter, the drive, a power supply and the ADFS ROM.

Has anyone looked on the Acorn ftp site to see if there's a circuit
diagram of the adapter there?  The Acorn adapter used quite a few chips
but I seem to remember it was all standard TTL, whereas the Watford
adapter used far fewer chips but used a couple of PALs, which would be
impossible to duplicate.

-- 
Mike Tomlinson