.MODEL SMALL
        .DATA
VAR1    DB 0
VAR2    DB 0
VAR3    DB 0
VAR4    DB 0
        .CODE
        .386    ;386 and higher!
        .STARTUP

        MOV AX, OFFSET VAR1     ; for demonstration purposes

        CMP AX, 0
        SETZ VAR1

        CMP AX, OFFSET VAR1
        SETE VAR2

        CMP AX, -5
        SETB VAR3       ; unsigned
        SETL VAR4       ; signed
         


        .EXIT
        END