$MOD2051 org 00h LJMP START org 100h START: SETB P1.7 SETB P1.6 CLR P1.5 CLR P1.4 NOP JB P3.0,WWA NOP JB P3.5,AWW NOP LJMP START WWA: LJMP PRAV NOP LJMP START AWW: LJMP LAVA NOP LJMP START PRAV: SETB P1.7 CLR P1.6 CLR P1.5 CLR P1.4 JNB P3.1,PRAV NOP LJMP START LAVA: CLR P1.7 SETB P1.6 CLR P1.5 CLR P1.4 JNB P3.1,LAVA NOP LJMP START END