I have the following code
(on atmel 89c55) :

;when I press the int0 button I have 2
;interrupts one on button low and one
;on button high. when I press the int1
;button I have my code running only
;when the button in up. I want both to
;do like int1

org 0h
jmp ext0

org 13h
jmp ext1

org 100H
start : ; something here
mov IE,#85h ; EA = 1, ex0,1 = 1
jmp $

ext0 : mov lp1,#80h ; button down
check0: jb int0,bad0
djnz lp1,check0
jnb int0,$ ; wait until button up
; here we have the real code
; here I draw a point on the lcd to see that the program is in here
bad0 : reti

ext1 : mov lp1,#80h ; button down
check1: jb int1,bad1
djnz lp1,check1
jnb int1,$ ; wait until button up
; here we have the real code
; here I draw a point on the lcd to see that the program is in here
bad1 : reti

end