I checked on Google a bit, this appears to be a standard serial terminal, correct?
To login to a Slackware machine over serial, open up /etc/inittab, and uncomment one or both of these lines:
Code:
#s1:12345:respawn:/sbin/agetty -L ttyS0 9600 vt100
#s2:12345:respawn:/sbin/agetty -L ttyS1 9600 vt100
These two lines enable serial logins on the first and second serial ports, respectively. After you have made the changes to inittab, either reboot, or give the command "init q".
If you just want to send text to the connected serial terminal, something like:
echo "TEST" > /dev/ttyS0
Should print "TEST" on a serial terminal connected to the first serial port.