title Debian GNU/Linux, kernel 2.6.24-1-686
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-1-686 root=/dev/hda1 ro quiet vga=791
initrd /boot/initrd.img-2.6.24-1-686
The new parameter added is vga=791, which means a resolution of 1024x768 with a colour depth of 16 bits per pixel (65,536 colours). Some other VGA modes would be:
791 - 1024x768, 16 bit
792 - 1024x768, 24 bit
794 - 1280x1024, 16 bit
795 - 1280x1024, 24 bit