/sys$common/syshlp/helplib.hlb MACRO, VAX MACRO Assembler, Directives, .BYTE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Generates successive bytes of binary data in the object module.

    .BYTE expression-list

    expression-list

    One or more expressions separated  by  commas.   Each  expression
    is first  evaluated  as  a  longword  expression;  then the value
    of the expression is truncated to one byte.  The value  of  each
    expression should  be  in the range of 0 through 255 for unsigned
    data or in the range of -128 through +127 for signed data.

    Optionally, each expression can be followed by  a  repetition
    factor delimited by square brackets.  An expression followed by a
    repetition factor has the format:

    expression1[expression2]

    expression1

    An expression that specifies the value to be stored.

    [expression2]

    An expression that specifies the number of times the  value  will
    be repeated.   The expression must not contain any undefined
    symbols and it must be absolute.  The square brackets are required.