DB               Define byte                                        Directive

  [name] DB expression [,expression] ...

    Allocates a byte of storage. name is the symbol you'll subsequently
    use to refer to the data.

    expression can be

        - a ? (question mark)
        - a duplicated expression (DUP)
        - a constant expression in the range -128 to 255
        - an 8-bit relative expression using the LOW or HIGH operators
        - a character string of one or more characters, using standard
          quoted string format; in this case, multiple bytes are defined,
          one for each character in the string