[SeaBIOS] More than 9 boot devices

[Аладышев Константин]

Is it possible in SeaBIOS to have working boot menu with amount of boot
devices more than 9?
I mean in this case we have boot device numbers with two digits, which is
impossible to select. If I want to select string 12 and try to enter "12",
SeaBIOS recognizes "1" and boot from device "1"...