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rufus/res/grub2/readme.txt
2017-04-05 11:12:58 +01:00

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This directory contains the Grub 2.0 boot records that are used by Rufus
* boot.img and core.img were compiled from
http://alpha.gnu.org/gnu/grub/grub-2.02~rc2.tar.xz, on a Debian stretch x64 system.
This was done following the guide from:
http://pete.akeo.ie/2014/05/compiling-and-installing-grub2-for.html.
--enable-boot-time was also added during ./configure for Manjaro Linux compatibility.
* boot.img has been modified to nop the jump @ 0x66 as per grub2's setup.c comments:
/* If DEST_DRIVE is a hard disk, enable the workaround, which is
for buggy BIOSes which don't pass boot drive correctly. Instead,
they pass 0x00 or 0x01 even when booted from 0x80. */
* Note that, for convenience reasons, the content of boot.img is *not* the one that
Rufus processes when writing the MBR.
Instead, the byte array from src/ms-sys/inc/mbr_grub2.h (whose content is identical)
is what Rufus uses. If you modify these files, be mindful that you may also need
to update the array in mbr_grub2.h.
* For details, see src/format.c, src/msys/br.c and src/msys/inc/mbr_grub2.h.