Date   : Wed, 20 Jul 2011 22:29:51 +0100
From   : jgh@... (J.G.Harston)
Subject: Emulating the 80186 CoPro on an ARM CoPro

Rick Murray wrote:
>> IEEE488
>> - a serial bus used mainly to communicate with laboratory
> Are you sure it isn't parallel? Seemed a lot of pins for a serial link.

Yes, it is a parallel interface, the connector has D1-D8 (Texas Instruments
always labelled their data pins the wrong way around). However, the API
has "serial send" and "serial receive" commands, so there is some sort
of serialisation somewhere. I'm not sure, maybe using one bit of the
parallel data.

BBC IEEE Interface manual at: http://mdfs.net/Docs/Books/IEEEFS

-- 
J.G.Harston - jgh@...