Does the '422 standard specify handshaking? Can you provide a reference,
or, better yet, a URL?
Dick
----- Original Message -----
From: "Pete Turnbull" <pete_at_dunnington.u-net.com>
To: <classiccmp_at_classiccmp.org>
Sent: Friday, November 24, 2000 5:46 PM
Subject: Re: 10base2 / 10baseT (again)
> On Nov 24, 23:25, Tony Duell wrote:
> > >
> > > > I'm trying to think of any interface on the Mac that is in any sense
> > > > 'standard'. And no, I can't think of one...
> > >
> > > Their serial and printer ports are rs232 ports. their USB is entirely
> normal.
> >
> > The serial ports on any Mac that I've seen are not RS232. They have
> > differential data lines for one thing. And I believe that the RS232
> > standard specifies a DB25 connector. The Mac serial ports are closer to
> > RS422 than anything, but they're not strictly RS422 ports either.
>
> Indeed. Wrong handshaking for RS422. And their DB25 SCSI isn't the same
> as the original PC version, and does not meet the spec laid out in the
SCSI
> standard, so their SCSI is hardly a standard either.
>
> --
>
> Pete Peter Turnbull
> Network Manager
> Dept. of Computer Science
> University of York
>
>
Received on Fri Nov 24 2000 - 19:34:40 GMT