#define KD_KEY_OFFSET (8 - kdMinScanCode)
#define KD_MIN_KEYCODE 8
#define KD_MAX_KEYCODE 254
#define KD_MAX_KEYCODE 255
#define KD_MAX_WIDTH 4
#define KD_MAX_LENGTH (KD_MAX_KEYCODE - KD_MIN_KEYCODE + 1)