From: wanis AT my-deja DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: GPF due to _farpokel
Date: Mon, 19 Jul 1999 16:53:10 GMT
Organization: Deja.com - Share what you know. Learn what you don't.
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Whoops.  I found the problem, and it was a pretty simple goof.  In my
code, I was creating a descriptor for memory which began at
'cardbasemem', and then I was ALSO adding 'cardbasemem' into the address
of my _farpokel.  All I needed in the _farpokel was the OFFSET from
'cardbasemem'...  I changed the _farpokel statement and now the code
works just fine.

I still have a few questions (mostly questions of curiosity) about
memory allocation, descriptors, and whatnot in protected mode.  Are
there any books/FAQs/web sites that provide a nice thorough introduction
to the subject?  (One thing I'm curious to know:  how did my application
gain the right to POKE the memory locations -- is it just because no
other application created a descriptor to that memory block?)

Thanks again for the help.

-- Paul


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