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Date: Wed, 06 Sep 2006 15:02:59 -0700
From: Ivor Bowden <ivorlist AT peritek DOT com>
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Newsgroups: comp.os.msdos.djgpp
Subject: 64 bit access under DOS?
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Message-ID: <44ff387a$0$19628$88260bb3@free.teranews.com>
NNTP-Posting-Date: 06 Sep 2006 21:07:06 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hi,

I have written a useful hardware debugging utility using the djgpp 
compiler, available at http://www.cwcgraphics.com/software_peritool.html 
. It only runs under DOS, Linux and VxWorks - Not Windows 98SE or above.

I would like the memory test to function in 64 bit mode on the PCI bus 
for hardware that supports it. Currently I am using the _farpeek and 
_farpoke routines, after mapping in the physical address, and can test 
byte, word and long accesses.

I have test hardware that I know supports 64 bit accesses, because I can 
see them on the logic analyzer when running certain Windows operations.

I could use something like _farpeekll / _farpokell (long long). I'm not 
sure what else I would need to do to set up the system for these kind of 
accesses.

The other thought I had was to set up some assembly routines to use the 
AMD64 instructions.

Any ideas or tips??

Thanks,

Ivor Bowden


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