tty-problem

[Taha Masood]

Hello ,
I am writing communication software using the serial port ttyb on a sun 4/110.
I am really having a hard time trying to make my software interrupt driven; i.e
whenever a message is available at the port an interrupt is generated which 
informs the program of the presence of data on the port.I have had success 
trying to make my timers in the program interrupt driven since a signal is 
generated each time the timer expires.No such signal seems to be generated when
data is present at the port.
I would really appreciate if somebody could give me valuable hints about
 writing such an interrupt driven software.


Thanks

Taha Masood

e-mail: masood.wbst311 at xerox.com