Date   : Thu, 17 Nov 2005 14:16:52 +0000
From   : Rob <robert@...>
Subject: Re: Best Emulator??

At 12:19 17/11/2005, Jules Richardson wrote:
>This purely on the Master? I seem to recall the BBC B SCSI board being
>significantly more complex than the Master one, or at least in terms of
>chip count.
>
>I suppose it's possible they used 4 bit registers and buffers everywhere
>in the BBC B one which is why the chip count's so high! I've always
>meant to look at the schematic as I've never figured out why it's so
>complex.
>
>I believe that the SCSI controller in the Viglen BBCs is different yet
>again, plus of course Torch made both a SASI and SCSI controller for the
>BBC... so there's at least 5 different flavours out there!


I've got an "Amcom" hard disc unit ... without pulling it out from the back
 
of the wardrobe, I can't say what the interface board has on it, but it 
wasn't very complicated, connected to a standard adatec board which 
connected to the hard discs, and it worked off the 1MHz bus on both a BBC B
 
and a Master ET (with connector added) using ADFS1.30.

Cost me £750 for 10Mb back in 1986 or so, well over a months wages ...

Rob