Re: Sparc Classic modem difficulties

[Chuck Yerkes <chuck+obsd_(_at_)_2003_(_dot_)_snew_(_dot_)_com>]

Quoting b (brian_(_at_)_brute_(_dot_)_2y_(_dot_)_net):
> Sparc Classic, 3.2.  I'm trying to hook up a modem, but I'm not sure which port to use (there is one 25 pin 
> female serial port marked A/B and another marked with two slashes) or what device to use.  If anyone has a 
> modem working on some similar Sparc and can tell me how it's hooked up and what device they're using to 
> communicate with it, I'd appreciate it.  TIA.

If you hit docs.Sun.com, you can likely find a field service manual for this.

As pointed out // are two parallel lines (sun finally offered
a parallel port with the Classic and my years of fighting serial
printers and plotters were over  :)

The serial port is the same introduces with the Sparc 5/20, AFAIK.
It's port A and port B in one.  Why they didn't just use DIN to
save space, I dunno.  But a regular cable will get you the A serial port.

Go to Celeste Stokeley's Serial port page of all knowledge.
(stokely.com)  I've made cables for this that grab both ports,
it's just a matter of knowing pinouts.  You're not a system
admin until you've made lots of serial cables and then redone
them right :)


I don't think you'll have much modem joy > 38.400 on the built in
ports.  Lock the modem to that speed, lock teh serial port to
that speed, let the modem negotiate with the other end.