DOS ain't dead

Intel's X86-S ISA specification document (Announce)

posted by RayeR , CZ, 06.06.2023, 07:25

Here's it in details: https://cdrdv2-public.intel.com/776648/x86s-EAS-v1-4-17-23-1.pdf

Interesting part is chapter 3.20.3 Legacy OS Virtualization
A VMM can choose to emulate legacy functionality as required:
1. VMM changes required for mainstream Intel64 guest using legacy SIPI or non-64-bit boot
a. Emulate 16-bit modes (real mode, virtual 8086 mode)
b. Emulate unpaged modes
c. Emulate legacy INIT/SIPI
...

So it seems that all legacy code triggers VMexit and VMM will need to emulate it fully by software - slow :\

---
DOS gives me freedom to unlimited HW access.

Complete thread:

• Intel mulls cutting ties to 16 and 32-bit support - marcov, 25.05.2023, 11:59 (Announce)
  • Intel mulls cutting ties to 16 and 32-bit support - Rugxulo, 27.05.2023, 03:17
    • Intel mulls cutting ties to 16 and 32-bit support - DosWorld, 27.05.2023, 08:18
      • Intel mulls cutting ties to 16 and 32-bit support - tkchia, 27.05.2023, 13:03
        • Intel mulls cutting ties to 16 and 32-bit support - marcov, 28.05.2023, 12:59
          • Intel mulls cutting ties to 16 and 32-bit support - tkchia, 28.05.2023, 15:27
      • Intel mulls cutting ties to 16 and 32-bit support - alexfru, 31.05.2023, 02:22
        • kill AVX instead - Rugxulo, 01.06.2023, 03:07
          • kill AVX instead - marcov, 01.06.2023, 13:36
        • Intel mulls cutting ties to 16 and 32-bit support - RayeR, 06.06.2023, 13:48
    • Intel mulls cutting ties to 16 and 32-bit support - marcov, 28.05.2023, 12:58
  • Intel mulls cutting ties to 16 and 32-bit support - RayeR, 27.05.2023, 13:10
    • Intel mulls cutting ties to 16 and 32-bit support - KormaX, 29.05.2023, 23:52
      • Intel mulls cutting ties to 16 and 32-bit support - RayeR, 30.05.2023, 01:42
        • Intel's X86-S ISA specification document - RayeR, 06.06.2023, 07:25
  • Intel mulls cutting ties to 16 and 32-bit support - glennmcc, 30.05.2023, 22:19