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- Newsgroups: comp.sys.intel
- Path: sparky!uunet!rde!ksmith!keith
- From: keith@ksmith.uucp (Keith Smith)
- Subject: Re: Overdrive for the 486/50??
- Organization: Keith's Computer, Hope Mills, NC
- Date: Tue, 22 Dec 92 21:41:29 GMT
- Message-ID: <1992Dec22.214129.15518@ksmith.uucp>
- References: <Yf7rijy00WB7RVXdRW@andrew.cmu.edu> <1fumfqINNedv@uniwa.uwa.edu.au> <8f9__KS00WB5Qu_ogq@andrew.cmu.edu>
- Lines: 30
-
- In article <8f9__KS00WB5Qu_ogq@andrew.cmu.edu> fj05+@andrew.cmu.edu (Faisal Nameer Jawdat) writes:
- >msimmons@ec.uwa.oz.au (Michael Simmons - mgmt_staff) writes:
- >> Why shouldn't this also work for 486DX/50 (50Mhz clock) -> 486DX2/66 (33Mhz
- >> clock)
- >
- >Well for one thing, the dx50 and the dx2/66 are different chips
-
- The Pin-outs are the same, The voltage LEVEL requirements are the same
- at those pins. The bus speed requirement are LESS on a DX2/66. You
- could run into a PERFORMANCE problem with with swap if you don't have
- user programmable wait states and such for the motherboard.
-
- >needing different motherboards, so it's quite possible that to switch
- >chips like that could be hazardous...
-
- If you had to de-solder the Crystal, YES. The last motherboard I got
- has is full of jumpers and will take any CPU/speed combo you care to put
- on it without messing with the crystal, which I don't seem to see
- anywhere on the darn thing. Moving the crystal DOWN in speed is
- unlikely to cause any problems in operation provided the leap is not too
- far (like jumping to 2Mhz or something may cause some problems with the
- support circuits). If you are brave enough to de-solder the puppy I'd
- suggest re-placing with a 14 pin gold tooled IC socket for an oscillator
- IC, and comming up with a socket for any other independent crystal, so
- you can put it back later.
-
- --
- Keith Smith uunet!ksmith!keith 5719 Archer Rd.
- Digital Designs BBS 1-919-423-4216 Hope Mills, NC 28348-2201
- Somewhere in the Styx of North Carolina ...
-