def print(val : Int)
  hex = true
  sign = val
  arr = uninitialized UInt8[19]
  accum = 0
  if sign < 0
    val = 0 - val
  end
  lut = StaticArray[
    '0', '1', '2', '3',
    '4', '5', '6', '7',
    '8', '9', 'A', 'B',
    'C', 'D', 'E', 'F'
  ]
  while true
    arr[accum] = lut[(val.to_u % 16)].ord.to_u8
    val = val.to_u / 16
    accum += 1
    break if val == 0
  end
  if hex
    arr[accum + 0] = 'x'.ord.to_u8
    arr[accum + 1] = '0'.ord.to_u8
    accum += 2
  end
  if sign < 0
    arr[accum] = '-'.ord.to_u8
    accum += 1
  end
  arr[accum] = '\0'.ord.to_u8
  i = 0
  j = accum - 1
  while i < j
    c = arr[i]
    arr[i] = arr[j]
    arr[j] = c
    i += 1
    j -= 1
  end
  accum.times do |i|
    Terminal.write_byte arr[i]
  end
end