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What's the reason why FreeDOS can't use the CSM (the BIOS compatibility mode of UEFI)?

• EvanAnderson 2y ago
  AFAIK it can. I believe some UEFI implementations don't have CSM.
  • p_l 2y ago
    a Type 3 UEFI implementation has no CSM, Type 2 has CSM available, Type 1 enforces booting into CSM (what many "BIOS"es actually was in later days)
    • EvanAnderson 2y ago
      Thanks for that. That sent me down an enjoyable rabbit hole. I got started with PCs back in the 80s and became fairly familiar with how boot worked back then. UEFI happened while I was paying attention to other things and I've never become as familiar with it as I should be. This was a good excuse to do some reading.
    • deaddodo 2y ago
      Just for clarification's sake, the proper terminology is "UEFI class" not "type". Otherwise, this is accurate.