From:	aho450s AT nic DOT smsu DOT edu (Tony O'Bryan)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Calling real mode far procedures
Date:	Sun, 29 Dec 1996 16:11:07 GMT
Organization:	Southwest Missouri State University
Lines:	15
Message-ID:	<32c696ce.7190251@ursa.smsu.edu>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 961229092751 DOT 10388P-100000 AT is> <32c67f4b DOT 1170160 AT ursa DOT smsu DOT edu>
NNTP-Posting-Host:	forseti.i31.smsu.edu
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>segment overrides or such, I might be able to move the real mode code
>into my PM code-space, convert the real mode code to PM instructions
>at startup, and call it directly as a C function.  This would make the

I just disassembled my video bios' bank swap code.  It was a mess of
subroutine calls that would have required a bunch of dynamic
relocations to convert it to a sequential stream of protected mode
instructions, and I don't want to go through that much trouble for
speed's sake just yet.  I wrote a little function to test the speed of
the bank swap interrupt under __dpmi_int(), and it seems tolerable
enough to work with for the time being.  

Thanks to all who replied.

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