Yes i have give for level or edge triggering--- i have used edge trigering.
I have used edge triggering but i really do not know the difference.
pls tell me the difference between the two.......

i am tell more about the codeing as bellow:
interrupt used ----int0 i.e pin p3.2
vector address------0003h
my code is as follows:

0000H LJMP MAIN
0003h LJMP ROUTINE

MAIN: MOV SBUF,#41H
JNB TI,$
CLR TI
JB P3.2,$
JNB P3.2,$
MOV SBUF,#42H
JNB TI,$
CLR TI
LJMP OVER

ROUTINE:
CLR EA
MOV SBUF ,#43H
JNB TI,$
CLR TI
SETB EA
RETI

OVER:
END

I have done the proper settings for serial communication and interrupt settings.
if i write the coding as above the program works well but if i remove the two lines JB P3.2,$ AND JNB P3.2 then my program does not works.
What is the reason pls tell me the reason.

Also one more thing pls tell the thing that what i said in the very first thread is it correct. I have stated it again.

"""""********The normal interrupt concept is that whenever an interupt occurs the uC executes the current on-going instruction, saves the contents of PROGRAM COUNTER(PC; which is the address of next instruction where the uC has to return after executing the ISR)onto the stack and then jumps to the vector address.***********""""""""""
Is the above concept about the uC correct.?????
So the two things i want to know is
1) why prog. does not works without jb/jnb p3.2.$ .???
2)What i have stated about uC is it correct.???