Smallest Number in External Memory

    MOV R2, #4h     ;counter
    MOV DPTR, #3000h    ;External Memory
    MOVX A, @DPTR
L1: MOV B, A
L2: DJNZ R2, L3     ;counter check
    SJMP STP
L3: INC DPTR
    MOVX A, @DPTR
    CJNE A, B, NEQ
    SJMP L2
NEQ:    JNC L2
    SJMP L1
STP:    MOV R1, B
    END