vt_axis_t
vt_axis_t vd_mx_drawn; /* (?) Mouse X and Y */
vt_axis_t vd_my_drawn; /* as of last redraw. */
vt_axis_t vd_width; /* (?) Screen width. */
vt_axis_t vd_height; /* (?) Screen height. */
vt_axis_t top, left;
vt_axis_t height;
vt_axis_t left;
vt_draw_2_vga16_px(struct vt_device *vd, vt_axis_t x, vt_axis_t y,
vt_draw_1_logo(struct vt_device *vd, vt_axis_t top, vt_axis_t left)