VGA_CRTC_OFFSET
wreg_crt(cirrus, VGA_CRTC_OFFSET, cr13);
outb_p(VGA_CRTC_OFFSET, vga_video_port_reg);
vga_wcrt(regbase, VGA_CRTC_OFFSET, pitch & 0xff);
par->crtc[VGA_CRTC_OFFSET] = vxres >> 3;
par->crtc[VGA_CRTC_OFFSET] = vxres >> 2;
par->crtc[VGA_CRTC_OFFSET] = (vxres * 3) >> 3;
par->crtc[VGA_CRTC_OFFSET] = vxres >> 1;
write3X4(par, VGA_CRTC_OFFSET, width & 0xFF);
par->crtc[VGA_CRTC_OFFSET] = vxres >> 1;