Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: 80286 protected mode
Date: Tue, 15 Oct 2024 05:20:10 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 15
Message-ID: <veku29$1jctr$1@dont-email.me>
References: <2024Oct6.150415@mips.complang.tuwien.ac.at>
	<2024Oct7.093314@mips.complang.tuwien.ac.at> <ve3kuh$22nr$1@gal.iecc.com>
	<2024Oct8.182332@mips.complang.tuwien.ac.at> <ve46nc$2leh$1@gal.iecc.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Tue, 15 Oct 2024 07:20:10 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="68414ff9982b4f6df6388ec05761b281";
	logging-data="1684411"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+Xqag/MrvKLh/2p+PuEnC4"
User-Agent: Pan/0.160 (Toresk; )
Cancel-Lock: sha1:mFmBOG5cUJnHCvlAxJbH4aj5Hxs=
Bytes: 1579

On Tue, 8 Oct 2024 21:03:40 -0000 (UTC), John Levine wrote:

> According to Anton Ertl <anton@mips.complang.tuwien.ac.at>:
>>
>>>If you look at the 8086 manuals, that's clearly what they had in mind.
>>>
>>>What I don't get is that the 286's segment stuff was so slow.
>>
>>It had to load the whole segment descriptor from RAM and possibly
>>perform some additional setup.
> 
> Right, and they appeared not to care or realize it was a performance
> problem.

They didn’t expect anybody to make serious use of it.