From mboxrd@z Thu Jan  1 00:00:00 1970
From: robert@timetraveller.org (Robert Brockway)
Date: Mon, 5 Feb 2018 10:41:26 +1000 (AEST)
Subject: [TUHS] Windows roots and Unix influence (was Re: Happy birthday,
 Ken Thompson!)
In-Reply-To: <20180204091435.GA22841@indra.papnet.eu>
References: <CAEoi9W7CaiOeeFde0G3t+_siaHGtpQosH95weB=MxjzjT4SgHA@mail.gmail.com>
 <c5f4d136-c531-e37e-6695-14ce4648e660@gmail.com>
 <20180204091435.GA22841@indra.papnet.eu>
Message-ID: <alpine.DEB.2.20.1802051026100.1684@sirius.opentrend.net>

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"
> GUI.

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!

Cheers,

Rob