Newsgroups: comp.os.msdos.djgpp
From: Peter Berdeklis <peter AT atmosp DOT physics DOT utoronto DOT ca>
Subject: Viewing Physical Addresses in gdb or fsdb?
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Organization: University of Toronto - Dept. of Physics
Date: Sat, 8 Feb 1997 14:58:00 GMT
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To: djgpp AT delorie DOT com
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I've got a set of memory buffers in DOS memory for using with DMA.  
Instead of copying them into my linear addr space then writing them out 
through the transfer buffer, I modified the _dos_write routine to 
accept a physical addr to write the buffers to disk.  As a result the 
buffers are never in my linear address space.

Is there a way that I can reference a physical address in gdb or fsdb?  
Of course I have selectors for each of the buffers, so can I pass a 
selector:offset pair to gdb or fsdb?  

If I temporarily load the selector into fs (say) can I use a segment 
override in the addr?

As always, thanks in advance.

---------------
Peter Berdeklis
Dept. of Physics, Univ. of Toronto