Subj : Re: X86S
To   : mary4
From : tenser
Date : Sat Apr 20 2024 12:49 am

On 19 Apr 2024 at 10:59a, mary4 pondered and said...
 
 ma>  fu> https://www.intel.com/content/www/us/en/developer/articles/technical/
 ma>  fu> g-future-simplified-architecture.html
 ma> 
 ma> i will skin who ever thought this is a good idea alive! >:(

It's actually a pretty good idea if they intend to keep
x86 relevant for new product development for much longer.
It costs Intel an enormous amount in validation to do a
new microarchitecture; much of that comes from the intrinsic
complexity of keeping 16-bit support around.

It really doesn't change that much for modern operating
systems; the boot sequence changes, and it's not clear to
me how you set up the initial page tables for starting the
BSP (they seem to defer that to some hidden core prior to
x86 coming out of reset), but the updated SIPI stuff is
kind of nice.

32-bit mode remains for userspace applications, so it won't
affect much software written in the last 30 years for real
operating systems.

The solution for DOS etc is to run it under a full-system
emulator.

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