CRTC_VSYNC_DIS
CRTC_VSYNC_DIS);
val |= (CRTC_DISPLAY_DIS | CRTC_VSYNC_DIS);
val |= (CRTC_DISPLAY_DIS | CRTC_VSYNC_DIS |
~(CRTC_HSYNC_DIS | CRTC_VSYNC_DIS | CRTC_DISPLAY_DIS));