vbe_find_mode_xydm
modenum = vbe_find_mode_xydm(width, height, -1, -1);
modenum = vbe_find_mode_xydm(
modenum = vbe_find_mode_xydm(width, height, -1, -1);
modenum = vbe_find_mode_xydm(0, 0, 0, n);
return (vbe_find_mode_xydm(x, y, depth, -1));