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| author | H. Peter Anvin <hpa@zytor.com> | 2012-05-27 12:57:01 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-05-27 12:57:01 -0700 |
| commit | 0fa998ef1c083bfbd1ec6d57a2cacc7c46b1e63f (patch) | |
| tree | 7ce3eff65a666a9fa75d1e31ce194c301d2852cf | |
| parent | 32d48e29a2306f6951ff54bc6938f0a33a348479 (diff) | |
| parent | 01f71dbc735e9c75cdc56c4d706824e30076e65f (diff) | |
| download | syslinux-0fa998ef1c083bfbd1ec6d57a2cacc7c46b1e63f.tar.gz | |
Merge remote-tracking branch 'genec/diag-mbr-fix-for-hpa'
| -rw-r--r-- | diag/mbr/README | 4 | ||||
| -rw-r--r-- | diag/mbr/handoff.S | 4 |
2 files changed, 5 insertions, 3 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 diff --git a/diag/mbr/handoff.S b/diag/mbr/handoff.S index 7af3fdeb..ab8582b7 100644 --- a/diag/mbr/handoff.S +++ b/diag/mbr/handoff.S @@ -43,11 +43,11 @@ * Install instructions (assuming your target is /dev/dev; file or block device): * * MBR: - * dd conv=notrunc bs=440 count=1 if=mbr_ho.bin of=/dev/dev + * dd conv=notrunc bs=440 count=1 if=handoff.bin of=/dev/dev * * VBR/PBR (should work for FAT12/16/32, ext[234]fs, btrfs): * echo -en "\0353\0130\0220" |dd conv=notrunc bs=1 count=3 of=/dev/dev - * dd conv=notrunc bs=2 count=210 seek=45 if=mbr_ho.bin of=/dev/dev + * dd conv=notrunc bs=2 count=210 seek=45 if=handoff.bin of=/dev/dev */ // #define DEBUG_MARKER1 /* Insert markers in binary */ |