Here are a few ideas:

We just went through something very similar, and finally determined that
the cable we were using was incorrect.  There are two different "PC"
standards for IDC10 <-> DB9 out there, and AFAIK there is no way to tell
from the cables we have.

My suggestion is to simply short pins 2-3 on the DB-9 and see if you get
characters echoed.  If you do not, then it is likely your cable is
wrong.  Try shorting TD and RD on the IDC10 header directly on the board
and try the same thing.  If that doesn't work, then it is clearly not
your cable.

Minicom has all sorts of settings for the RS-232 control lines, so you
might want to try that program if the above doesn't give you any joy.

It is also possible that you can a login daemon running on that port --
causes all kinds of strange errors if so.

The manual for the NT 4801 has the pinout for COM2, which AFAIK is the
same for the Net5501.

-bd

On Wed, 2008-07-23 at 10:04 +0000, Stuart Henderson wrote:
> On 2008-07-23, Bill Maas <[EMAIL PROTECTED]> wrote:
> > RTS/CTS is enabled by default, at least on a net5501 (I had trouble with
> > an oddly wired cable a while ago).
> 
> afaik, that would only affect the boot loader. for OpenBSD, use
> a boot loader dated after 2008/04/20, it was rewritten to access
> the hardware directly rather than via BIOS.
> 
> 
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