MMU Read Me

MMU is a program to display logical to physical
mappings by probing the underlying MMU tables.
It is suppose to work on 68030 and 68040 machines.
It may also work on 68020 and 68851, however, that
has not been verified (as of July 4, 1997).

Version 1.3:
Two bug were fixed:
	The Upper Limit on tables that had limits was
			incorrectly being compared against.  It was
			one of those off by errors that you get when
			you compare  a < b  instead of  a <= b.
			Thanks go to Marten Kooser for pointing that
			out.
	Also, 020 class machines should now be supported by
			this new version.  However, it has not been
			tested on such.

Version 1.2:
One bug was fixed:
	Changed the code for reading from the MMU tables
			so that there should never be any conflict.

Version 1.1:
Many, many bugs have been fixed:
	The output is much cleaner
	A VM Test is installed, but rumor has it that
			Apple broke that in some system software
			versions.
	It now outputs the size of memory.
	It now dumps the MMU tables.  This is
			good for post-mortem in the case that
			some ouput seems wrong.  Hopefully the raw
			data won't be wrong.
	An evil, nasty bug has been fixed which would crop
			up on the 030 machines when a page table had
			a limit imposed on it.  Only the first
			page past the limit was being counted
			and all other past-limit pages were ignored
			causing the program to lose track of its
			logical to physical mapping for the remainder
			of memory.  Bad!
	The machine name strings have been fixed.  It turns
			out a comma was missing after a machine name
			string in a list of strings.  This caused two
			strings to be concatenated (i.e., "abc" "xyz")
			and caused the entire machine name string to be
			off by one.

-- Randy Thelen
rthelen@ix.netcom.com
rthelen@firepower.com