VGA_CRTC_MODE
wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);
outb_p(VGA_CRTC_MODE, vga_video_port_reg);
vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7);
vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3);
vga_wcrt(regbase, VGA_CRTC_MODE, 0xE3);
svga_wcrt_mask(regbase, VGA_CRTC_MODE, 0x23, 0x7f);
par->crtc[VGA_CRTC_MODE] = 0xC3 ;
write3X4(par, VGA_CRTC_MODE, 0xC3);
par->crtc[VGA_CRTC_MODE] = rMode | ((mode & MODE_TEXT) ? 0xA3 : 0xE3);