wilson@carcoar.Stanford.EDU (Paul Wilson) (09/07/89)
I'm looking for a cheap hardware platform that will run Mach with
a small page size. I'm considering a microVAX, but something with
a better price/performance ratio would be nice. I can get a MacII
pretty cheap.
Does anybody know offhand the page size on the MacII? My understanding
is that the MC68851 can handle any page size that's a power of 2 multiple
of 512 bytes; the choice of page size is up to the system designer.
My source for this little tidbit (BYTE) doesn't specify whether this
means the hardware designer or the OS designer. I suspect it's the
former because page size choice often interacts with cache design
considerations. So anyway, if the page size is fixed in hardware,
what is it? And if not, how small a page can I get with Mach?
(Oh yeah -- Apple has its own propriety PMMU that's a subset of the
68851 -- maybe that fixes the page size, at least for some MacII's?)
thanks prematurely,
Paul
Paul R. Wilson
Software Systems Laboratory lab ph.: (312) 996-9216
U. of Illin. at C. EECS Dept. (M/C 154) wilson@bert.eecs.uic.edu
Box 4348 Chicago,IL 60680
Paul R. Wilson
Software Systems Laboratory lab ph.: (312) 996-9216
U. of Illin. at C. EECS Dept. (M/C 154) wilson@bert.eecs.uic.edu
Box 4348 Chicago,IL 60680