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- Newsgroups: comp.sys.intel
- Path: sparky!uunet!think.com!enterpoop.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!jfc
- From: jfc@athena.mit.edu (John F Carr)
- Subject: Re: 486/66 .. Into a 486/50 motherboard?
- Message-ID: <1992Dec24.010425.19979@athena.mit.edu>
- Sender: news@athena.mit.edu (News system)
- Nntp-Posting-Host: achates.mit.edu
- Organization: Massachusetts Institute of Technology
- References: <92351.46019.J056600@LMSC5.IS.LMSC.LOCKHEED.COM> <BzFnyr.IHI@wimsey.bc.ca>
- Date: Thu, 24 Dec 1992 01:04:25 GMT
- Lines: 12
-
- In article <BzFnyr.IHI@wimsey.bc.ca> sl@wimsey.bc.ca (Stuart Lynne) writes:
- >Since 20 nanosecond SRAM still needs wait states to run with 33 Mhz clock I
- >suspect it will be a while before DRAM gets fast enough to run with no
- >wait states at 50 Mhz :-)
-
- I had assumed that the 20 ns caches advertised with 486 systems were 0
- wait state. Is this not true? How many bus cycles does it take for a
- (33, 50) Mhz 486 to read (a word, a cache line) from a 20 ns secondary
- cache?
-
- --
- John Carr (jfc@athena.mit.edu)
-