Path: utzoo!attcan!uunet!samsung!zaphod.mps.ohio-state.edu!swrinde!ucsd!hub.ucsb.edu!mcm
From: mcm@maple.ucsb.edu (Marcelo Mourier)
Newsgroups: comp.os.minix
Subject: Chips & Technology ISA chip-set
Message-ID: <6290@hub.ucsb.edu>
Date: 16 Sep 90 21:20:28 GMT
Sender: news@hub.ucsb.edu
Reply-To: mcm@maple.ucsb.edu (Marcelo Mourier)
Organization: University of California, Santa Barbara
Lines: 15

Hi everybody!

Here's another question regarding PC Minix.  Does anybody know if the Chips
& Technology ISA chip-set used in most AT/386 motherboards solved the early
problem of the DMA controller hardware not being able to read/write across
a 64k physical address boundary..?  If this is the case, it wouldn't be
necessary to throw away those buffers in the cache that lay across a 64k
boundary.  Of course this would help only in 32-bit Minix, where the size of
the buffer cache is big enough that it spans several 64k boundaries.

Marcelo - mcm@cs.ucsb.edu


--
Marcelo Mourier (mcm@cs.ucsb.edu)