Date   : Wed, 20 Jul 2011 20:03:58 +0200
From   : rick@... (Rick Murray)
Subject: Emulating the 80186 CoPro on an ARM CoPro

On 20/07/2011 19:27, Rob wrote:

> IEEE488

Ah, yes, I think that was it.


> - 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.


> More usually you couldn't. Pain in the arse.

Yes. It looks (from experience and trial/error) that the Compaq shares 
an interrupt from everything...


> USB is only slightly better. Except when this laptop goes to sleep,
> and I wake it up, nothing connected to a USB port works any more :-(

I guess it depends upon the firmware? I find my Bluetooth fails (device 
not recognised) if I "disable" it, but generally USB is fairly reliable, 
at least on my computer.
That said - there's a lot of abuse of USB - devices that draw a *lot* of 
power (harddiscs, scanners), plus using the regulated 5V supply for crap 
like plug-in keyboard vacuum cleaners... <sigh> Not to mention to make 
something static resistant, hot-swappable, and reliable when using a 
slightly dodgy spade-connector arrangement.



Any further ought to be PM...


Best wishes,

Rick.

-- 
Rick Murray, eeePC901 & ADSL WiFI'd into it, all ETLAs!
BBC B: DNFS, 2 x 5.25" floppies, EPROM prog, Acorn TTX
E01S FileStore, A3000/A5000/RiscPC/various PCs/blahblah...