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From: jjr@sgtech.UUCP (John Radigan)
Newsgroups: comp.os.os2.misc
Subject: Re: MicroChannel Determination in OS/2
Message-ID: <78@sgtech.UUCP>
Date: 12 Apr 91 15:39:37 GMT
References: <6634@gssc.UUCP>
Sender: news@sgtech.UUCP
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From article <6634@gssc.UUCP>, by timo@gssc.UUCP (Timo Wilson):
> I am currently involved in writing a small OS/2 bound application that must
> determine if it is running on a MicroChannel or ISA bus.  The application
> does have one segment that has IOPL privilages.  I can determine this under
> DOS using INT 15, Ah=0xC0, but can't use it in OS/2.  Has anyone else done
> anything like this in OS/2?
> 
> Thanks in advance for any help offered.
> 
> -timo
> timo@gss.com

I saw a device driver that did this by issuing an ABIOS call. I guess ABIOS
is only implemented on IBM PS/2 MCA machines. This driver assumed that if
the ABIOS call returned an error of some sort, that ABIOS was not present,
and it must be running on a non-MCA box. I don't have the code around to get
any more details. I would imagine you could make this call from an IOPL
code segment. Hope this helps.
--
John Radigan, Star Gate Technologies, Inc., Solon, Ohio  
Email: jjr@sgtech.uucp		Telephone: (216) 349-1860 x666