hi all

and iam using at89c52 and program it with assembley langauge
iam new at using micro controllers i was reading about it alot and now i started the implementation
iam trying to test the I/O process but i got confused
thier is some mistake i dont know what is it

iam connecting push buttons on p1.0 ->p1.4
and pull up resistors from p1.5 -> p1.7

and iam connecting too the push button on the external interupt 0

the interupt working fine

the problem is i wanna to know the binary or hexa value
of the pressed push button!! i tried alot but i couldnt reach a result
any body can help?