From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=unavailable autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,5385624f72218ba7 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-11-06 14:59:16 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!fr.usenet-edu.net!usenet-edu.net!enst!enst.fr!not-for-mail From: "Hans-Olof Danielsson" Newsgroups: comp.lang.ada Subject: Re: HAL (was AdaOS) Date: Tue, 6 Nov 2001 23:47:48 +0100 Organization: ENST, France Sender: comp.lang.ada-admin@ada.eu.org Message-ID: References: <9r8pvf$vms$1@papyrus.erlm.siemens.de> <9rk11n$e4n$1@plutonium.btinternet.com> <9rk749$ndt$1@papyrus.erlm.siemens.de> <9rnid9$541$1@neptunium.btinternet.com> <9s3u20$10s0sv$1@ID-25716.news.dfncis.de> <9s670f$u2e$1@papyrus.erlm.siemens.de> <9s74eb$12b2bq$1@ID-25716.news.dfncis.de> <9s76dh$ls0$1@nh.pace.co.uk> <9s9413$11mrei$1@ID-25716.news.dfncis.de> <3BE81B26.285928FC@san.rr.com> <9s994b$11sv9j$2@ID-25716.news.dfncis.de> Reply-To: comp.lang.ada@ada.eu.org NNTP-Posting-Host: marvin.enst.fr Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Trace: avanie.enst.fr 1005087552 16487 137.194.161.2 (6 Nov 2001 22:59:12 GMT) X-Complaints-To: usenet@enst.fr NNTP-Posting-Date: Tue, 6 Nov 2001 22:59:12 +0000 (UTC) To: Return-Path: X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org X-Mailman-Version: 2.0.6 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: comp.lang.ada mail<->news gateway List-Unsubscribe: , List-Archive: Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org Xref: archiver1.google.com comp.lang.ada:15956 Date: 2001-11-06T23:47:48+01:00 "Nick Roberts" skriver: > Your enlightenment is appreciated, but I'm sorry, I'm afraid it sounds a bit > like someone trying to sell me a pair of boots that will do all the walking > for me. ........ In her book "Inside Windows NT" Helen Custer describes *NT's pair of boots* %>) like this: "Hadware abstraction layer (HAL). Places a layer of code between the NT executive and the hardware platform on which Windows NT is running. It hides hardware-dependent details such as I/O interfaces, interrupt controllers and communication mechanisms. Rather than access hardware directly, NT executive components maintain maximum portability by calling the HAL routines when they need plattform-dependent information. ..... Platform-dependent code - that is, code that relies on a particular manufacture's implementation of a MIPS R4000 computer, for example - is located in the HAL and is proveded by individual computer manufaturers. Device drivers contain device-specific code, of course, but they aviod processor-dependent and platform-dependent code by calling NT kernel routines and HAL routines." One thing one can wonder over is how heavy NT's pair of boots are. Hans-Olof Danielsson