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| author | Gene Cumm <gene.cumm@gmail.com> | 2012-05-27 14:13:05 -0400 |
|---|---|---|
| committer | Gene Cumm <gene.cumm@gmail.com> | 2012-05-27 14:13:05 -0400 |
| commit | 01f71dbc735e9c75cdc56c4d706824e30076e65f (patch) | |
| tree | e31b563382a72938991d62db5731ca345667318c | |
| parent | 28e6e7abceb63d8de87f16150d16cd5f5f72c64c (diff) | |
| download | syslinux-01f71dbc735e9c75cdc56c4d706824e30076e65f.tar.gz syslinux-01f71dbc735e9c75cdc56c4d706824e30076e65f.tar.xz syslinux-01f71dbc735e9c75cdc56c4d706824e30076e65f.zip | |
diag/mbr: Clarify README
Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
| -rw-r--r-- | diag/mbr/README | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/diag/mbr/README b/diag/mbr/README index fb7a7dd8..96b67c6c 100644 --- a/diag/mbr/README +++ b/diag/mbr/README @@ -5,11 +5,13 @@ handoff.bin Show the data that the BIOS/MBR hands off to an MBR/VBR. +++ USAGE +++ +NOTE: in the examples, mbr.bin, /dev/hda and /dev/hda1 are used as generic representations. + Writing out an MBR is straight forward (it is assumed below that /dev/hda is the target raw device and /dev/hda1 is the target partition): dd conv=notrunc bs=440 count=1 if=mbr.bin of=/dev/hda -Writing a VBR to match Syslinux requires more work as it must have a jump and be offset into the partition: +Writing a VBR to match Syslinux requires more work as it must have a jump and be offset into the partition (and as a result the code must be compaible with this offset): echo -en "\0353\0130\0220" |dd conv=notrunc bs=1 count=3 of=/dev/hda1 dd conv=notrunc bs=2 count=210 seek=45 if=mbr.bin of=/dev/hda1 |