Opps, must have missed understood your post regarding what info is
available.
I'm sure this has been based around before, but what about systems without
extended BIOS functions? Is it possible to probe memory by writing/reading
a pattern....
I understand some L2 caches will actually cache writes to invalid addresses,
but playing games with the cache it should be possible to work around this.
Another problem is 'reflections'. Where a write to an invalid page will
cause the pattern to appear in a lower page (probably page zero).
I know SCO use a probe to detect memory, and they have got it correct on
all systems I've used (although I'm sure someone has a story where they
haven't :)
Regards,
markhe