int bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val);
int bochsvga_get_linelength(struct vgamode_s *vmode_g);
int bochsvga_set_linelength(struct vgamode_s *vmode_g, int val);
int bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val);
int bochsvga_get_linelength(struct vgamode_s *vmode_g);
int bochsvga_set_linelength(struct vgamode_s *vmode_g, int val);