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 - 18:46:42 GMT