CRTC1_REGISTER_OFFSET
#define CRTC1_REGISTER_OFFSET (0x1e7c - 0x1b7c)
#define CRTC1_REGISTER_OFFSET (0x1e7c - 0x1b7c) //(0x79f0 - 0x6df0)/4
#define CRTC1_REGISTER_OFFSET (0x1d9c - 0x1b9c)