[TUHS] Windows roots and Unix influence (was Re: Happy birthday, Ken Thompson!)
robert at timetraveller.org
Mon Feb 5 10:41:26 AEST 2018
On Sun, 4 Feb 2018, Angelo Papenhoff wrote:
> At some point they moved some graphical things into the kernel that were
> in user space originally (I don't know what exactly), this was done for
> performance reasons. Perhaps that's what you meant with the "bolted on"
I watched the development of NT during that period and I recall that
graphics was originally in ring 1 on i386 until NT 3.51. From NT 4
onwards graphics drivers were moved to ring 0 (the kernel).
I believe this push came from the marketting department. Moar speed!
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