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Re:Intel x86 documentation has more pages than the 6502 has ... by en4bz on Wednesday December 07, 2016 @06:37PM (#13127221)
I would say that roughly 25% of the documentation applies to ancient modes of operation like real mode and protected mode. Unless you REALLY need to know the fine details of these modes you can skip right to the long mode stuff.
Re:Intel x86 documentation has more pages than the 6502 has ... by johncolanduoni on Thursday December 08, 2016 @12:13AM (#13128551)
Windows still uses a lot of programs in emulated protected mode, so it's pretty relevant still.