On Jun 3, 2013, at 5:24 PM, Dave McGuire <mcguire at neurotica.com> wrote:
On 06/03/2013 03:48 PM, Liam Proven wrote:
When 486
and Pentium came out, they were treated as fast 386s, and seemed
to stay that way for a very long time.
Well, they are. The instruction set didn't change from the 80386 in
1985 until the Pentium-MMX in about 1996.
Ahh, then why was it so important for Linux to specifically de-support only the 80386?
I know there's at least one byte-swapping instruction that appeared
in the 486. Beyond that, I assume it has more to do with the MMU
and other associated builtins (cache controller, maybe?) than with
actual instructions.
- Dave