Article <vbvpl4$eil0$1@dont-email.me>

Warning: mysqli::__construct(): (HY000/1203): User howardkn already has more than 'max_user_connections' active connections in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\includes\artfuncs.php on line 21
Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connections
Warning: mysqli::query(): Couldn't fetch mysqli in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\index.php on line 66
Article <vbvpl4$eil0$1@dont-email.me>

Deutsch English Français Italiano

<vbvpl4$eil0$1@dont-email.me>

View for Bookmarking (what is this?)
Look up another Usenet article

Path: ...!2.eu.feeder.erje.net!3.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Lars Poulsen <lars@beagle-ears.com>
Newsgroups: comp.arch
Subject: Re: Address bits again, Article on new mainframe use
Date: Thu, 12 Sep 2024 15:23:31 -0700
Organization: AfarCommunications Inc
Lines: 23
Message-ID: <vbvpl4$eil0$1@dont-email.me>
References: <20240912141925.000039f3@yahoo.com>
 <memo.20240912223318.19028n@jgd.cix.co.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Fri, 13 Sep 2024 00:23:33 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="19fd2da2ffff63ce2dd0c925cc477dc3";
	logging-data="477856"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+mKlU4BrhkULUDsMy2LAbsxmknVl8+wWM="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:A9lGJlHszT1twIdrr9TKaruXQWk=
Content-Language: en-US
In-Reply-To: <memo.20240912223318.19028n@jgd.cix.co.uk>
Bytes: 2171

On 9/12/2024 2:33 PM, John Dallman wrote:
> In article <20240912141925.000039f3@yahoo.com>, already5chosen@yahoo.com
> (Michael S) wrote:
> 
>> x86 Real mode segmentation is a hack to the address space. 80286
>> protected mode segmentation is something else. The only similarity
>> between the two is maximal size of segment is the same.
> 
> Yup. 80286 segmentation is horribly complicated as compared to real mode,
> and still gives you tiny segments. The only widespread OS that used it
> AFAIK was OS/2 1.x, much to its disadvantage. IBM's insistence that OS/2
> run on the 286 was a world-shaping mistake.
> 
> 386 mode was far more useful, and survives to the present day.
> 
> John

The subset of 386 mode that ended up being used was just a single flat 
virtual address space per process with paging.

I found 286 mode very useful. We used it in an bedded system with a "DOS 
Extender". We made malloc() give us a fresh segment for every call, and 
it caught a lot of simple code bugs. Bounds checking with very low overhead.