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by rwmj 699 days ago
What's the reason why FreeDOS can't use the CSM (the BIOS compatibility mode of UEFI)?
1 comments
EvanAnderson 699 days ago
AFAIK it can. I believe some UEFI implementations don't have CSM.
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p_l 698 days 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)
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EvanAnderson 698 days 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.
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deaddodo 698 days ago
Just for clarification's sake, the proper terminology is "UEFI class" not "type".

Otherwise, this is accurate.

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