The Convert Integer to Hexadecimal Text routine converts an
    unsigned integer to a hexadecimal ASCII text string. OTS$CVT_
    L_TZ supports Fortran Zw and Zw.m output conversion formats.

    Format

      OTS$CVT_L_TZ  varying-input-value

                    ,fixed-length-resultant-string

                    [,number-of-digits] [,input-value-size]