Date   : Mon, 11 Sep 2006 17:05:40 +0100
From   : Andrew Benham <adsb@...>
Subject: Re: Master AIV SCSI

Jules Richardson wrote:

> Never tried as I don't think the software side of it's there, but fuzzy
> memory says that the Master AIV SCSI interface is actually proper SCSI
> rather than SASI.

Ooo.  The LV-ROM players seem to date from 1987, which is a couple of
years later than the BBC Winchester upgrade.

I've found that VFS talks to registers at FE80-3, rather than FC40-3,
but I've not got as far as tracing an OSBYTE $62 yet.

> I'm reasonably confident that the VP-415 *is* proper SCSI, which in turn
> suggests that the VFS ROM does drive the /ATN line.

Right, I'll press on with my reading of the code then.

The next question will be does anyone have a schematic of the Acorn SCSI
card (0161,000) ?

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

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