cat ascii.hex | ascii2binary -b h -t us > ascii.bin

x86dis -e 0 -s att -f ascii.bin 

echo "d8 01 77 c4 90 90 90 90" | ascii2binary -b h -t uc | x86dis -e 0 -s intel

echo "d801 77c4" | ascii2binary -b h -t us | x86dis -e 0 -s intel