OT - help with SCO communication problem

[Bill Campbell]

On Sat, Jul 02, 2005, Leefp1 at aol.com wrote:
>
>   Looking for any SCO gurus to help diagnose a problem.
>
>   In a sentence, the problem is I have lost serial communication from a
>   Windows XP Terminal running Anzio Lite to a SCO host and cannot figure
>   out why.
>
>   Environment:  SCO OS 5.0.3.  Host is Intel based SCSI box with two
>   serial ports on the motherboard.  Com 1 (tty1A) is used for a dial up
>   modem; Com 2 (tty2a) is used for the serial connection to the Windows
>   box.  This terminal at this site has worked for several YEARS with no
>   maintenance and no problems.
...
>   The strange this is that if I disable tty2a and then reenable it; Unix
>   sends a getty to the windows box and the login prompt appears.  But no
>   keystrokes will be accepted. I am not at the site now, but I wish I
>   would have tried sending a date prompt to the terminal to see if it
>   would have showed up... I suspect it would.  Thus, in my laymen's
>   terms, it appears the unix host is able to send to the windows box but
>   the windows box cannot send back.

Do you have something else that you can connect to the SCO box's serial
port to test it (e.g. dumb terminal, another Windows box, etc.)?

Do you have a breakout box with LED indicators you can put between the SCO
box and the Windows box to see what's happening on the wire between them?

If you type ``stty -a < /dev/tty2a'' on the SCO box, You should see
interesting things like baud rate, echo status, etc.

You could also disable /dev/tty2a on the SCO box, and connect with kermit,
cu, or some other terminal program to see whether you can talk to the
Windows box.

Bill
--
INTERNET:   bill at Celestial.COM  Bill Campbell; Celestial Software LLC
UUCP:               camco!bill  PO Box 820; 6641 E. Mercer Way
FAX:            (206) 232-9186  Mercer Island, WA 98040-0820; (206) 236-1676
URL: http://www.celestial.com/

Government is the great fiction, through which everbody endeavors to
live at the expense of everybody else.  -- Frederic Bastiat