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From: sonny@charybdis.harris-atd.com (Bob Davis)
Newsgroups: comp.os.msdos.programmer
Subject: TSR Install: Int 27h or Int 21h,Fcn 31h ?
Message-ID: <4684@trantor.harris-atd.com>
Date: 30 Oct 90 14:09:12 GMT
Sender: news@trantor.harris-atd.com
Reply-To: sonny@trantor.harris-atd.com (Bob Davis)
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Organization: Advanced Technology Dept., Harris ESS, Melbourne, FL
Lines: 22


	Stuff I read says that Int 27h for installing a TSR
should be considered obsolete and should not be used. Says 
use DOS Int 21h, Fcn 31h instead.

	Yet every TSR I look at uses Int 27h to go resident.

	For me, Int 27 works fine. With DOS 3.3, Int 21,Fcn 31
does not work. Kokkonen's Mark/Release mapmem command shows
the TSR resident after the Int 21, but the specified interrupt 
is not shown as hooked by the TSR. And the TSR is not functional.

	What gives? My BIOS should not matter, should it? I have
a BIOS dated sometime in 1985: November, I think.

	Thanks.
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