Xref: news2.mv.net comp.lang.ada:22814 comp.os.msdos.djgpp:6063
From: Greg Bond <bond AT ee DOT ubc DOT ca>
Newsgroups: comp.os.msdos.djgpp,comp.lang.ada
Subject: Interrupt overhead with DJGPP's extender
Date: Tue, 16 Jul 1996 17:03:32 -0700
Organization: Dept. of Electrical Eng., UBC
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Message-ID: <31EC2DD4.7A94@ee.ubc.ca>
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

I understand that DJGPP programs run with the help of a DOS extender to 
enable execution in a 32 bit protected address space under DOS. I'm 
curious what overhead DJGPP's DOS extender imposes on programs in 
general (I've been able to find no documentation on-line pertaining to 
the functionality of DOS extenders). 

In particular, I'd like to know what overhead is imposed by DJGPP's DOS 
extender for interrupt handling (in GNAT Ada - although I can't see why 
it should be any different in C). 

--
* Greg Bond                         * Dept. of Electrical Eng.  
* email: bond AT ee DOT ubc DOT ca             * Univ. of British Columbia      
* voice: (604) 822 0899             * 2356 Main Mall                 
* fax:   (604) 822 5949             * Vancouver, BC              
* web: http://www.ee.ubc.ca/~bond   * Canada, V6T 1Z4