Hi:

What is the use of the SFR "SP"? I read the information given in the tutorials, but I still don't understand the usage of the SP.

I want the 89c52 JMP to a particular address after the interrupt.

There are 7 light sensors in my robot. All of them share the INT0 by an "OR-gate"(any of them detected the ball will trigger the INT0.)

After the interrupt, I MOV the value of the 7 light sensors into RAM. I want to check which of the light sensors detected the ball.(by a series of "JBC")

After indicated which light sensor detected the ball, I JMP to the repensented movement (dash, left turn...) But all the robot's movement are in the INT procedure.(i.e. no further interrupt allowed).

How can I solve this problem? (allow further interrupt)

Stanley Lio