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Path: utzoo!watmath!watnot!watmum!smvorkoetter
From: smvorkoetter@watmum.UUCP (Stefan M. Vorkoetter)
Newsgroups: net.micro.pc
Subject: Re: MS/PC DOS?
Message-ID: <659@watmum.UUCP>
Date: Thu, 30-Oct-86 00:28:01 EST
Article-I.D.: watmum.659
Posted: Thu Oct 30 00:28:01 1986
Date-Received: Thu, 30-Oct-86 07:28:01 EST
References: <985@husc2.UUCP> <394@catnip.UUCP> <4058@amdahl.UUCP> <404@catnip.UUCP> <277@puff.wisc.edu>
Reply-To: smvorkoetter@watmum.UUCP (Stefan M. Vorkoetter)
Organization: U of Waterloo, Ontario
Lines: 14
Keywords: MS-DOS, PC-DOS
Summary: 

In article <277@puff.wisc.edu> plocher@puff.WISC.EDU (John Plocher) writes:
>>And, as I type this, my keystrokes are being processed by those very same
>>BIOS ROMs, although my machine is running multiuser Xenix, not PC-DOS.
>    WRONG!
>      If you are using XENIX, your keystrokes are NOT going through
>      any ROM routines - in fact, the ROMs are ONLY used at boot time
>      to determine HARD DISK parameters.
>      The Xenix device drivers are totally seperate from any of the
>      ROM BIOS routines!
>      (this info relates to MicroSoft/IBM Xenix 2.0 (SVR2ish) only)

This info probably relates to any PC UN*X system, since it would be hard
to implement (read: IMPOSSIBLE) a multitasking OS on top of a BIOS that
isn't re-entrant.