Re: OS/2 DOS compatible box

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#1521

From: Peter Knight
Date: Thu, 20 Sep 1990 07:49

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william@ashtate (William Wong) writes:



>I have a question concerning the OS/2 DOS compatible box.

>How does a DOS program detect that it's running in the OS/2 DOS compatible
>box?

>I have tried using the INT 21 service 30h to get the DOS version.  It
>returns AL=10, AH=10 when run under OS/2 version 1.10.  Now the minor
>version in AH seems correct, but I am not so sure about the major version
>number in AL.  Does OS/2 DOS compatible box always return its version
>number times 10 to distinguish itself from the regular DOS?

>William
Yes.
Peter Knight
BT Research

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From: prk@planet.bt.co.uk (Peter Knight)
Newsgroups: comp.os.os2.programmer
Subject: Re: OS/2 DOS compatible box
Message-ID: <prk.653816998@aries>
Date: 20 Sep 90 07:49:58 GMT
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