Ok, I always use el torito spec's to make my cd/dvd bootable.
But I was wondering ECMA 168 spec's have a BOOT2 standard identifier other then the el torito specification standard identifer.
Does the bios when booting from a cd/dvd look only at sector 17 and for the the structure type field being zero to determine if it is a bootable device?
I am just curious how a BOOT2 boot descriptor would work. Obviously it contains the same data to get you to a Initial/Default entry.
But for BOOT2 is it the same fields from their on out.
I am just curious how a BOOT2 descriptor would work on sector 17. Or is El torito spec's the only one Bios support when booting from a cd/dvd
Page 33 is what I am looking at
http://www.ecma-international.org/publi ... ma-168.pdf
UDF is an extension of this format so I am assuming UDF uses BOOT2 for making a bootable cd/dvd?
I just can't find out what goes on the extent specified by the field boot_extent_location.
In el torito their was a format like initial/Default entry, ...etc etc. So is the extent the location of the boot image or are their entry's like el torito spec's have.
I would assume their must be a structure to the extent or else how would you have more then one boot image on a BOOT2 descriptor?
I just wonder where the BOOT2 spec's are for the extent in it's boot extent location?
Thanks for any help