Date   : Thu, 15 Jan 2004 17:29:03 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: Host adapter Issue D

Other than Acorn and Torch, who else made hard disk interface boards for
the BBC? Torch did both a SCSI and SASI interface board; I'd assume only
the SASI was fitted to standard BBC machines (although even the SCSI
board is very simple).

Oh, the board set from another Torch Hard Disk machine landed on the
doorstep yesterday, and it got me curious as it's the first time I've
seen the use of an Adaptec ACB4000 board; normally Torch favoured Xebec
controllers on their BBC-based machines and Omti boards on some of the
higher-spec systems. 

That does kind-of imply that enough of the command set is the same
between the Xebec and Adaptec boards that they are interchangeable as
far as driving them from software is concerned. That or someone replaced
a dead Xebec board with an Adaptec one, wondered why nothing worked, and
stripped the machine for the boards :-)

I'll have to draw out the schematics for the Torch SASI interface
sometime and see how it compares to Acorn's board.

cheers

Jules