thanks instant answer !
if you can specify a system/BIOS that supports int13h native 4k sector support..
Uh, no, USB support through BIOS is not what I'm asking here,
if BIOS could do it by itself Grub'4DOS support wouldn't be needed
New G4D version 0.4.6a has its own USB-EHCI mass-storage class - doesn't use
the BIOS, the sad fact is at the moment, for some odd reason they have hard-coded
sector sizes to 512 bytes. The hard part is done - USB is hard! - I'm confident
it would not be extremely hard, in comparison, to add the 4K sector case
for them who know their code intimately...
Then for boot support (chainloading) , it'll be trivial to load a 4K boot sector or MBR
to memory at absolute 00007C00 and start execution there...
As another useful application, boot/chainload an OS from another disk
but keeping GRUB4DOS's EHCI driver as the USB BIOS...
You can log a request here...
Aye ! Good, I'll do that !
Edited by Ninho, 03 March 2015 - 07:21 PM.