CRTC0_REGISTER_OFFSET
#define CRTC0_REGISTER_OFFSET (0x1b7c - 0x1b7c)
#define CRTC0_REGISTER_OFFSET (0x1b7c - 0x1b7c) //(0x6df0 - 0x6df0)/4
#define CRTC0_REGISTER_OFFSET (0x1b9c - 0x1b9c)