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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!destroyer!terminator!stimpy.css.itd.umich.edu!jlarke
- From: jlarke@css.itd.umich.edu (Jason Larke)
- Subject: Re: Who makes VESA local bus motherboards?
- Message-ID: <1992Sep9.023901.26078@terminator.cc.umich.edu>
- Sender: jlarke@css.itd.umich.edu (Jason Larke)
- Organization: Game:Guild
- References: <pg65pkg@zola.esd.sgi.com> <pjvgi5c@fido.asd.sgi.com> <pk3euuk@zola.esd.sgi.com>
- Distribution: usa
- Date: Wed, 9 Sep 1992 02:39:01 GMT
- Lines: 26
-
- In article <pk3euuk@zola.esd.sgi.com> blean@rwb.esd.sgi.com (Bob Blean) writes:
- >In article <pjvgi5c@fido.asd.sgi.com>, pdc@lunch.wpd.sgi.com (Paul Close) writes:
- >|> Even ISA is faster than all but the fastest hard drives. ISA can do up to 4
- >|> megabytes/second, whereas most hard drives are in the 1-2 MB/s range. This
- >|> means that wether your hard drive controller is on the ISA bus or local bus,
- >|> your hard drive performance will be the same.
- >
- >That wouldn't be so for a cached controller that got a hit, would it?
- >In such a case, I should think the ISA bus a limiting factor.
- >-- Bob
-
- But how much data are you likely to get out of a cache? If you have
- a meg or more then sure, local bus or EISA will be beneficial. For 256k,
- the benefit is less visible. Granted that most controllers with cache
- offer large sizes, the point remains: the cache only helps on a hit,
- and transfer speeds return to normal on a miss.
-
- I've seen very few large ISA cached controllers in any case, so the
- whole debate may be academic.
-
-
- --
- ----------------------------------------------------------------------
- |Jason Larke - jlarke@umich.edu - Computer Consultant, Philosophy guy|
- |Ain't none of this blithering endorsed by anybody. Darn. |
- --------Windows: n. When bad programming meets swell marketing--------
-