Path: utzoo!attcan!uunet!van-bc!ubc-cs!cheddar.ucs.ubc.ca!ballard
From: ballard@cheddar.ucs.ubc.ca (Alan Ballard)
Newsgroups: comp.os.os2.programmer
Subject: Re: DOS driver under OS/2
Keywords: device driver
Message-ID: <10480@ubc-cs.UUCP>
Date: 15 Nov 90 16:51:41 GMT
References: <478@epicb.com> <1990Nov15.160926.5036@cbnewsk.att.com>
Sender: news@cs.ubc.ca
Reply-To: ballard@cheddar.ucs.ubc.ca (Alan Ballard)
Distribution: na
Organization: UBC Computing Centre, Vancouver, B.C., Canada
Lines: 16

In article <1990Nov15.160926.5036@cbnewsk.att.com> dez@cbnewsk.att.com (daniel.e.zuccarelli) writes:
>However you must rewrite your drvier for OS/2, and it
>must be a bi-modal (both real and protected mode) driver if you plan
>on calling it from the DOS box (which runs in real mode). 
 
Supposedly, some DOS drivers can run unchanged, as long as you *only* call 
them from the DOS box.  However, the constraints are such that few drivers
are likely to make it... character mode only, no interrupt handler,
(hardware) device cannot also be accessed in any way from prot mode.



Alan Ballard                   | Internet: ballard@ucs.ubc.ca
University Computing Services  |   Bitnet: USERAB1@UBCMTSG
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