sy22.asm

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    ORG 0000H
    LJMP I0START
    ORG 0013H
    LJMP INT1RK
    ORG 0003H
    LJMP INT0RK
    ORG 1150H
I0START: MOV SP,#5FH
         MOV DPTR,#0E100H
         MOV A,#03H
         MOVX @DPTR,A
         MOV TCON,#05H
         MOV IE,#85H
HER:     AJMP HER
INT0RK:  MOV A,#40H
         MOV DPTR,#0E102H
         MOVX @DPTR,A
         RETI
INT1RK:  MOV A,#00H
         MOV DPTR,#0E102H
         MOVX @DPTR,A
         RETI