Modeline "1024x768" 75 1024 1048 1184 1328 768 771 777 806 -hsync -vsync Modeline "1280x1024" 135 1280 1312 1416 1664 1024 1027 1030 1064The following two modelines seem to work reliably at 16bpp:
Modeline "640x480" 45.80 640 672 768 864 480 488 494 530 -hsync -vsync Modeline "800x600" 36 800 824 896 1024 600 601 603 625