Thanks for the info.

I'll try the Hyperterminal option.
I need to read up on this but what is the best method to determine if its RS232 (I'm sure it is) & establishing what the baud rate should be etc.

This is an 8052 chip fitted on a board.
Yes, I would just like to verify it has been programmed before and look for a changed in output when the user interface (push buttons) are used.

Regards,
Stuart

P.S. Apologies for my lack of knowledge in this field.