Does MSDOS destroys interrupt vectors during start?

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#7664

From: G|ran Bostr|m
Date: Fri, 22 Jan 1993 13:14

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I'm writing a device driver using serial communications (i e COM 1 - 4).

As far as I can see the MSDOS systems initializes the interrupt
vectors for COM 1 - 4 __AFTER__ the drivers has been loaded.

This destroys the vectors I've just installed during the INIT-pahase in
the just loaded device driver.

Is this correct? Can I circumvent this?

G|ran.
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G|ran Bostr|m               email: goran@infovox.se  |  We make your
Infovox AB, Box 2069        phone: + 46 8 764 3572   |  computer
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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!palantir.p.tvt.se!infolog!infovox.se!infopc52.infovox.se!GORAN
From: GORAN@infovox.se (G|ran Bostr|m)
Subject: Does MSDOS destroys interrupt vectors during start?
Message-ID: <GORAN.31304.727708491@infovox.se>
Lines: 16
Sender: news@infovox.se
Organization: Infovox AB, Sweden
Date: Fri, 22 Jan 1993 13:14:51 GMT