;P1.0 connected to LED + 330 Ohm resistor to Vcc
;P1.1 connected via  push to on switch to GND

         org 0H

         setb  P1.1      ; Define as input
  Loop:  mov   C,  P1.1
         jc    Loop      ; wait for switch activation
         mov   P1.0, C
         jmp   $         ; LED on till reset

         end


Raghu