Date   : Mon, 08 Feb 1999 14:53:34 +0000 (GMT)
From   : Frank Lee <frank@...>
Subject: Re: BBC hard drives

Hi Mark,

> Yes. Using the circuit board "as is" will enable the connection of an SCSI
> hard drive, but it will not function 100% correctly. I am still unsure as to
> the reason why. The only way to make a hard drive work without any
> alterations to the design is to connect a MFM / RLL drive to the interface
> via an Adaptec 4000/4070 board or similar as described in the documents.
By 'not 100% correct' do you mean that it's useable? I don't really want 
to get into the game of having to find an Adaptec board and MFM/RLL drive 
when I've a couple of spare 80Mb SCSI drives looking for good use - most 
of the attraction is that of small outlay!

> I would be interested to know what you mean by the inconsistency in the
> power connections to the circuit board, and to correct any errors that may
> have crept in, or make amendments to the original documentation.
Quite a trivial one - the image showing the layout of th components gives 
the 5V connection as being the one nearest C1 - in fact the other 
diagrams show 5V as being the one nearest the 1MHz Bus Connector.

Thanks,

Frank

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