MOD_BLCS_SHIFT
#define MOD_BLCS_16BIT (0 << MOD_BLCS_SHIFT)
#define MOD_BLCS_8BIT (1 << MOD_BLCS_SHIFT)
#define MOD_BLCS_24BIT (2 << MOD_BLCS_SHIFT)
#define MOD_BLCS_MASK (3 << MOD_BLCS_SHIFT)