11 Sep
2005
11 Sep
'05
1 p.m.
In message <m1EECCS-000IyXC at p850ug1>
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Actaully, a PERQ centronics interface, but I can't
see any good reason
why it wouldn't work with a PET (although it doesn't do any kind of code
conversion.
That's the one! A couple of 16V8s and a 20V8, right?
No, you misunderstood me. There is no CPU involved in
this serial
adapter. The EPROM is the logic for the GPIB handashake. It's the GPIB
timing that's way out. It works with a PET as the other side of the link
because the PET does all the handshaking in software, so it's pretty
forgiving about timing problems. But this seiral adapter will _not_ with,
say, a 9914 as the other device on the bus..
Ah. Probably better to use that as an example of how not to design a GPIB
interface, I guess.
Thanks.
--
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