Article View: comp.os.msdos.programmer
Article #6845Re: Memory allocation error
From: Joe Huffman
Date: Tue, 28 May 1991 20:35
Date: Tue, 28 May 1991 20:35
36 lines
1365 bytes
1365 bytes
theall@rm105serve.sas.upenn.edu (George A. Theall) writes:
>In article <1991May24.235640.17077@proto.com> joe@proto.com (Joe Huffman) writes:
>>--------- high memory -------\
>> \
>> --- Resident portion
>> --magic position-- /
>>----- not so high memory ----/
> How does one determine where this portion begins in high memory?
Rough outline:
long unsigned int mask = 1L << 20;
long unsigned int M;
do /* A binary search. */
{
mask >>= 1;
M |= mask;
Allocate all of DOS memory.
if(M < bytes_allocated)
{
Set the top 'M' bytes to 0.
Free all allocated DOS memory.
Exit program.
if(no_crash)
M ^= mask;
}
else
M ^= mask;
} while(mask != 0);
Answer = 'Magic position' is M bytes from top of memory.
--
joe@proto.com
Technical Details
Message-ID:
<1991May28.203501.24420@proto.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!swrinde!mips!spool.mu.edu!uunet!proto!joeReferences:
<1991May20.055124.24741@ariel.unm.edu> <1991May23.092728.440@sc2a.unige.ch> <1991May24.235640.17077@proto.com> <43736@netnews.upenn.edu>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!swrinde!mips!spool.mu.edu!uunet!proto!joe From: joe@proto.com (Joe Huffman) Newsgroups: comp.os.msdos.programmer Subject: Re: Memory allocation error Message-ID: <1991May28.203501.24420@proto.com> Date: 28 May 91 20:35:01 GMT References: <1991May20.055124.24741@ariel.unm.edu> <1991May23.092728.440@sc2a.unige.ch> <1991May24.235640.17077@proto.com> <43736@netnews.upenn.edu> Organization: Prototronics @ Sandpoint, Idaho Lines: 36