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- Newsgroups: comp.sys.intel
- Path: sparky!uunet!news.claremont.edu!ucivax!megatek!rstewart
- From: rstewart@ganglia.megatek.uucp (Rich Stewart)
- Subject: Re: Future of i860 line
- Message-ID: <1992Aug31.151640.16824@megatek.com>
- Sender: rstewart@megatek.com (Rich Stewart)
- Reply-To: megatek!rstewart@uunet.uu.net
- Organization: Megatek Corporation, San Diego, California
- References: <1992Aug28.182116.4396@megatek.com> <1992Aug29.031847.28867@nas.nasa.gov> <Btr4Iz.GB9@pgroup.com>
- Date: Mon, 31 Aug 1992 15:16:40 GMT
- Lines: 28
-
- In article <Btr4Iz.GB9@pgroup.com> lfm@pgroup.com (Larry Meadows) writes:
- >In article <1992Aug29.031847.28867@nas.nasa.gov> klee@wilbur.nas.nasa.gov (King M. Lee) writes:
- >>
- >>One reason why the i860(tm) did do better may be that good compilers
- >>were not available when it was first introduced. It would have been
- >>better for the i860 if they had developed compilers while designing
- >>the chip. The compilers have improved, but it may be too late.
- >
- >Are you listening, Intel?
- >
- >>
- >>Of all the modern micros, the i860(tm) is the only one I know of
- >>that allows one to bypass cache. There are two instructions to
- >
- >Yes! Very good point. If you can't bypass cache then you have
- >to hope/arrange for re-use, which is much harder.
- >--
- >Larry Meadows The Portland Group
- >lfm@pgroup.com
-
- Stop this. You can bypass cache on lots of chips. Most caching cpu's
- can have cache bypassed in the page tables. A second way, if your board
- is designed to do it, is a software toggle of some sort. I think, most
- modern cpu's, have a cache enable/disable pin.
-
- And finally, you do not want to use pfld's that might access memory
- that is in a cachable address range. (Right Larry?).
- -Rich
-