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- Newsgroups: comp.sys.att
- Path: sparky!uunet!utcsri!geac!censor!becker!hybrid!torsqnt!tmsoft!lsimages!whome!camaro!tfoley
- From: tfoley@camaro.uucp (Tim Foley)
- Subject: Re: 3b/400 speedups
- References: <1992Dec28.152156.22894@tigger.jvnc.net> <1992Dec29.162910.16424@serveme.chi.il.us> <1992Dec30.132655.647@hakatac.almanac.bc.ca>
- Organization: camaro
- Date: Sat, 2 Jan 1993 18:09:21 GMT
- Message-ID: <1993Jan2.180921.12543@camaro.uucp>
- Distribution: usa
- Lines: 31
-
- In article <1992Dec30.132655.647@hakatac.almanac.bc.ca> rthomas@hakatac.almanac.bc.ca (Robert N Thomas) writes:
- >In article <1992Dec29.162910.16424@serveme.chi.il.us> greg@serveme.chi.il.us (Gregory Gulik) writes:
- >>My 3B2/400 is currently running at 14 MHz. To do this, I got a
- >>14 MHz crystal, and the complete chipset which has been rated
- >>for 14 MHz.
- >
- > I took a few moments to take a look inside my 3B2/400 system...
- >
- >Another CLOCK CHIP labeled...
- > CTS SINGAPORE
- > 974-6033-0
- > 20.0 MHz
- > 8448 887
- >
- > This one looks like a typical STD clock chip one might find in an old
- >IBM AT computer. I don't have nightmares about de-soldering this one...
- >Is this the chip you replaced??? If this is the GUY, I might PLOP in a 25MHz
- >chip, and increase the speed by 20%..
-
- If someone has the schematics for the 3B2, make sure there are no divider
- chains and such that depend on that 20.mhz or whatever clock, such as Uarts
- etc. As some uarts depend on an external clock to create the baud rates,
- etc...
-
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