ELF
        pull @ $argc
        pull @ $programname
        -test 1 with @ $argc
                when    zero                    help
        pull SI
L hexin
        = 8 to C
        zero B
L hexin_per_byte
        upshift 4 to B
        = @ SI to A
        maskbyte  A
        + $hexnybble to A
        = @ A to A
        flag A
                when sign                       bail
        AND 0x0f to A
        OR A to B
        1+ SI
                when    C-1                     hexin_per_byte
L bail
#       = A to B
                        Linux $exit



