In message <xofaeyyyxx8.fsf@blubb.pdc.kth.se>, Johan Danielsson writes:
> Steve Bellovin <smb@research.att.com> writes:
> 
> > > The 600 use a DSP, thats one reason why I didn't by one.
> > > There is no support for a free unix version.
> > 
> > They use a DSP for the serial port, and not just for the modem?  I
> > was asking about the former, not the latter.
> 
> The built-in modem is a win-modem-like thing using a dsp. The serial
> ports are real serial ports, you just have to enable them in the bios
> (with the ps2 dos utility -- cf. TFM).

It is enabled; I checked in both DOS and Windows.
> 
> I'm not sure, but I got the impression that the 600 has just one
> serial port, and some kind of (software) switch for Cu or IR, but the
> 600E has two ports (Cu and IR).

I have a 600E.  The IR port is probably useless to me; it's not even
at a standard COM port address.  But the serial port is; I just can't
make NetBSD see it.  I suspect that I have to add some strange sort of
enable operation first.