DOS ain't dead

CSM BIOS for EFI machines (Announce)

posted by Zyzzle, 31.05.2025, 00:25

> EDIT: it seems I hit the problem:
> It is almost required to run CSMWrap with above 4G decoding disabled in
> your BIOS/UEFI. As UEFI firmwares are likely to place GPU's VRAM BAR above
> 4G, and legacy BIOS are 32bit which means it can only access the first 4G
> of memory.
>
> I have to check if my SETUP has an option for 4G decoding disable, I
> doubt a bit...
Unfortunately it seems no UEFI-only setup would ever have such an option, especially on 64-bit systems! I've never seen it even on old BIOS systems.

And it is also "impossible" to shim this disabling through some sort of pre-loader which modifies the registers directly before the .efi file loads?

Complete thread:

• CSM BIOS for EFI machines - Oso2k, 27.05.2025, 18:51 (Announce)
  • CSM BIOS for EFI machines - kerravon, 27.05.2025, 20:15
  • CSM BIOS for EFI machines - RayeR, 28.05.2025, 20:54
    • CSM BIOS for EFI machines - RayeR, 29.05.2025, 15:58
    • CSM BIOS for EFI machines - Zyzzle, 31.05.2025, 00:25
      • CSM BIOS for EFI machines - RayeR, 03.06.2025, 02:10
        • CSM BIOS for EFI machines - Zyzzle, 03.06.2025, 04:53
          • CSM BIOS for EFI machines - kerravon, 03.06.2025, 06:16
          • CSM BIOS for EFI machines - RayeR, 03.06.2025, 12:36
  • CSM BIOS for EFI machines - success! - RayeR, 11.06.2025, 04:32
    • CSM BIOS for EFI machines - success! - RayeR, 01.07.2025, 04:43
      • CSM BIOS for EFI machines - success! - Zyzzle, 07.07.2025, 02:43
        • CSM BIOS for EFI machines - success! - RayeR, 09.07.2025, 17:05
  • CSM BIOS for EFI machines - 0ffer, 24.06.2025, 14:22