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Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: "Paul Edwards" <mutazilah@gmail.com> Newsgroups: comp.lang.c Subject: Re: [OSDev] How to switch to long mode in x86 CPUs? Date: Sun, 2 Mar 2025 19:22:46 +1100 Organization: A noiseless patient Spider Lines: 34 Message-ID: <vq14gq$mrnn$1@dont-email.me> References: <871pvje5yq.fsf@onesoftnet.eu.org> <vprtt6$3jah9$1@dont-email.me> <vpu3m5$3804$1@dont-email.me> <JdFwP.46247$SZca.36276@fx13.iad> Injection-Date: Sun, 02 Mar 2025 09:22:51 +0100 (CET) Injection-Info: dont-email.me; posting-host="dd7533a903225ad273252969102fec66"; logging-data="749303"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/nqfQYyxfSt7FN6I361D3Ibaw0kGVkjTI=" Cancel-Lock: sha1:6Cf8R+m7BRrB7x6Ag3ko5pdCUBs= X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-Priority: 3 Bytes: 2108 "Scott Lurndal" <scott@slp53.sl.home> wrote in message news:JdFwP.46247$SZca.36276@fx13.iad... > "Paul Edwards" <mutazilah@gmail.com> writes: > >"David Brown" <david.brown@hesbynett.no> wrote in message > >news:vprtt6$3jah9$1@dont-email.me... > >> On 27/02/2025 16:57, Ar Rakin wrote: > > > > >Do you consider the concept of a BIOS (as seen as the IBM PC), > >"legitimate to use" > > In the abstract, possibly. But the last half century has > shown that BIOS as an I/O abstraction layer was a bad idea > from the start. > > >and do you consider MSDOS (which uses that > >BIOS) to be an operating system? > > No, MSDOS was, is, will always be a simple program loader. Plus manages memory. Plus manages file systems Plus provides an API Plus provides a device driver interface Plus provides a command shell Plus provides other utilities It's far from "simple" having to write and debug all that. Your mileage apparently varies, which is fine. BFN. Paul.