serial communication between two 89c51

i didnt understood what u mean . plz simplify it..

simply change 7-seg common pin to some other free pin available on controller so your serial communication can happen without any problem.

Hey Man, I know that it is been a long time... but did you get the solution for your problem..??
I got the same problem, the only difference is that I am using Assembly Language, but that does not matter, because it works on the ISIS but it does not work in the breadboard.

If you could give me a solution, it would be perfect.