Article View: comp.os.msdos.programmer
Article #2936Re: Device driver INIT function
From: david nugent
Date: Wed, 07 Nov 1990 00:43
Date: Wed, 07 Nov 1990 00:43
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1619 bytes
In <CMM.0.88.657803304.ingea@svarte.ifi.uio.no> ingea@IFI.UIO.NO (Inge Arnesen) writes:
> According to the MS DOS documentation I have, only the lower MS DOS functions
> (up to call 0ch) can be called from a device driver function (to prevent
> DOS reentrancy).
Yes, MS documentation is always "correct" and "complete" (heavy sarcasm!).
> I have heard roumors that other functions might be called from the INIT
> function of a device driver. An author of a QEMM386-like program uses
> the Exec function call from the INIT function without problems.
> Does anybody know what function I can call from the INIT function in a
> device driver?
I've used write handle (40H), get vector (35H), set vector (25H) with no
apparent problems under DOS versions 3.10 and above (I don't support earlier
DOS versions in my software anyway, so that's all I care about).
I guess it's most often a case of "try it and see". :-)
- david
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!timbuk!cs.umn.edu!ub.d.umn.edu!rutgers!ucsd!swrinde!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!csource!david From: david@csource.oz.au (david nugent) Newsgroups: comp.os.msdos.programmer Subject: Re: Device driver INIT function Message-ID: <753@csource.oz.au> Date: 7 Nov 90 00:43:12 GMT References: <CMM.0.88.657803304.ingea@svarte.ifi.uio.no> Organization: Unique Computing Pty Ltd, Melb, Aust. Lines: 30