CRTC_EN
crtc_gen_cntl |= CRTC_EXT_DISP_EN | CRTC_EN | CRTC_VGA_LINEAR | CRTC_CNT_EN;
OUTREG(CRTC_GEN_CNTL, crtc_gen_cntl & ~(CRTC_EXT_DISP_EN | CRTC_EN));