On 28/06/2015 22:50, Mateusz Viste wrote:
> I quickly (re)read
> the XMS v2.0 standard, and haven't found any function that would even
> communicate the physical address of the data back to the application...

Actually, by taking a closer look I did find the function 0Ch from both 
the XMS 2.0 and 3.0 standards. This function returns the physical 
address (called "base address" for the occasion) of the allocated XMS 
block as a 32bits integer.

Now, I could imagine an application (like DOS4GW) that gets such address 
and puts it into a 24bit field. Such behaviour would effectively limit 
an application to being able to use only the lowest 15MB of the XMS memory.

All this is pure speculation on my part of course, but at least it's 
"some" plausible theory. Anyway, this doesn't matter much, since the 
limitation itself is clearly there, and there are ways of dealing with 
it (as described in my previous messages).

Mateusz


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