Article View: comp.os.os2.programmer
Article #1648Re: DOS driver under OS/2
From: John Cowan
Date: Fri, 16 Nov 1990 17:30
Date: Fri, 16 Nov 1990 17:30
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In article <1990Nov15.160926.5036@cbnewsk.att.com>, dez@cbnewsk.att.com (daniel.e.zuccarelli) writes: >[An OS/2 device driver] >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). This statement is too weak. An OS/2 driver must be bi-modal whether it is called from the compatibility box or not, because it will have to service real-mode interrupts that come in when the >user< is running the compatibility box. The only thing that can be omitted from an OS/2 driver not used from the compatibility box is the real-mode (DOS-compatible) calling sequence, which is usually trivial to provide. -- cowan@marob.masa.com (aka ...!hombre!marob!cowan) e'osai ko sarji la lojban
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!aplcen!haven!adm!cmcl2!phri!marob!cowan From: cowan@marob.masa.com (John Cowan) Newsgroups: comp.os.os2.programmer Subject: Re: DOS driver under OS/2 Keywords: device driver Message-ID: <27442249.D19@marob.masa.com> Date: 16 Nov 90 17:30:49 GMT References: <478@epicb.com> <1990Nov15.160926.5036@cbnewsk.att.com> Distribution: na Organization: The Logical Language Group, Inc. Lines: 17