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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
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"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.