X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f
From: "Rod Pemberton" <dont_use_email AT xnothavet DOT cqm>
Newsgroups: comp.os.msdos.djgpp
Subject: detecting DOSBox?
Date: Sun, 11 May 2014 14:01:23 -0400
Organization: Aioe.org NNTP Server
Lines: 16
Message-ID: <op.xfpi0lzu6zenlw@localhost>
NNTP-Posting-Host: CNsg4fVcCsvs3UaOgZtQCw.user.speranza.aioe.org
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
X-Complaints-To: abuse AT aioe DOT org
User-Agent: Opera Mail/12.16 (Linux)
X-Notice: Filtered by postfilter v. 0.8.2
Bytes: 1414
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com


I'd like my program to exit gracefully instead of crashing under
emulated environments, such as DOSBox, dosemu, Windows 98/SE console,
etc.  I'm having an especially difficult time detecting DOSBox.
What are the known techniques for doing this?

So far, I've looked at the results of 'mov cr0', 'smsw', and a
variety of Int 0x2f calls, such as 0x1600, 0x160A, 0x4680, 0x4010.
Of course, I don't have all possible environments where the code
could be executed, e.g., I can't test OS/2, Win 3.11, Win NT,
Win 95, etc.  So, compiled information on the expected results of
those calls or any other suggested calls or techniques would be
useful.


Rod Pemberton