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From:	Todd David Rudick <rudick AT CS DOT Arizona DOT EDU>
Newsgroups:	comp.os.msdos.djgpp,rec.games.programmer
Subject:	Re: Trapping access to memory...
Date:	Wed, 19 Jul 1995 17:48:31 -0700
Organization:	University of Arizona CS Department, Tucson AZ
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References:	<3uivoo$kql AT kannews DOT ca DOT newbridge DOT com> <3uk418$jj6 AT st-james DOT comp DOT vuw DOT ac DOT nz>
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To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway:	from newsgroup comp.os.msdos.djgpp

On 19 Jul 1995, Malcolm Taylor wrote:

> The trapping that GO32 does is on the 4Kb page boundaries. The processor 
> will automatically cause a page fault if an access is to a 4Kb page that 
> has the not present bit set. GO32 does not supply any services for a 
> program to handle page exceptions itself, and it would be pretty hairy 
> trying to change GO32 to do it as you would have to deal with locking 
> pages for you page fault handler etc.

  don't the svga libraries handle bank swiching with page faults? The 
answer must be in the source code for the graphics libraries...

                           +-----------------------+
                           |   Todd David Rudick   |
                           | rudick AT cs DOT arizona DOT edu |
                           +-----------------------+

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