DOS ain't dead

Code at 0x9F00 segment after boot (Miscellaneous)

posted by Laaca , Czech republic, 04.11.2020, 21:00

> Strange code at 0x9F00:0x000 (equal to 4KB) after boot (AMI UEFI DUAL
> BIOS).
> It includes MONITOR and MWAIT instructions, among others, and jumps to
> protected mode.
> What could it be?
> Is there any option in UEFI to get rid of it?

Some notebooks or mainboards allow to switch between legacy BIOS and UEFI.
Just try to switch into legacy BIOS setting.

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DOS-u-akbar!

Complete thread:

• Code at 0x9F00 segment after boot - CandyMan, 04.11.2020, 17:50 (Miscellaneous)
  • Code at 0x9F00 segment after boot - Laaca, 04.11.2020, 21:00
    • Code at 0x9F00 segment after boot - CandyMan, 05.11.2020, 12:35
      • Code at 0x9F00 segment after boot - RayeR, 06.11.2020, 13:27
        • Code at 0x9F00 segment after boot - tkchia, 08.11.2020, 07:45
          • Code at 0x9F00 segment after boot - RayeR, 08.11.2020, 16:07
            • Code at 0x9F00 segment after boot - Zyzzle, 09.11.2020, 06:46
              • Code at 0x9F00 segment after boot - tkchia, 09.11.2020, 17:23
                • Code at 0x9F00 segment after boot - RayeR, 10.11.2020, 03:52
          • Code at 0x9F00 segment after boot - CandyMan, 08.11.2020, 20:50
            • Code at 0x9F00 segment after boot - tkchia, 09.11.2020, 17:03
        • Code at 0x9F00 segment after boot - CandyMan, 08.11.2020, 20:45
          • Code at 0x9F00 segment after boot - bretjohn, 09.11.2020, 00:26