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* Also revert GRUB 2 core.img to vanilla 2.06, with the hope that GRUB will *ACTUALLY* bother to release in 2023 and we will be able to update to GRUB 2.12 (or whatever non-sequential version they decide to go with) to say a most welcome goodbye to this whole 2.06 incompatibility crap! |
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|---|---|---|
| .. | ||
| boot.img | ||
| core.img | ||
| grub2_version.h | ||
| readme.txt | ||
This directory contains the Grub 2.0 boot records that are used by Rufus
* boot.img and core.img were created from:
https://ftp.gnu.org/gnu/grub/grub-2.06.tar.xz
on a Debian 10.9 x64 system using the commands:
./autogen.sh
# --enable-boot-time for Manjaro Linux
./configure --disable-nls --enable-boot-time
make -j4
cd grub-core
../grub-mkimage -v -O i386-pc -d. -p\(hd0,msdos1\)/boot/grub biosdisk fat exfat ext2 ntfs ntfscomp part_msdos -o core.img
* 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.