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- Path: sparky!uunet!usc!cs.utexas.edu!swrinde!gatech!destroyer!cs.ubc.ca!mala.bc.ca!oneb!hakatac!rthomas
- Newsgroups: comp.sys.att
- Subject: Re: 3b/400 speedups
- Message-ID: <1992Dec30.132655.647@hakatac.almanac.bc.ca>
- From: rthomas@hakatac.almanac.bc.ca (Robert N Thomas)
- Date: Wed, 30 Dec 92 13:26:55 GMT
- References: <1992Dec28.152156.22894@tigger.jvnc.net> <1992Dec29.162910.16424@serveme.chi.il.us>
- Distribution: usa
- Organization: Sir HackAlot's Castle BBS, Port Alberni, B.C., Canada
- Lines: 45
-
- 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...
-
- One chip Labeled...
- WE 32102-W
- McCoy 8528
- MC790A1-001
- 1x = 10.00MHz
- 2x = 20.00MHz
-
- This one looks like a wierd oversized clock chip.. It has about 6-12
- pins which are soldered directly into a 3-4 multi-layered motherboard..
- The de-soldering of this type of beast gived me goosebumps, and I start
- having nightmares of the trace on layer 2 not getting connected back up
- for some reason.. I am hopeful that this isn't the one I am to remove!!
-
- 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%..
-
- The rest of the chips are socketed and are the Memory Management Unit (MMU),
- WE 23100 CPU, and the Math Accelerator Unit (MAU)..
-
- WE 32101 N5
- WE 32100 N5
- WE 32106 N5
-
-
- Anyways, there's the chips I have in my 400.. Any ideas, or a pointer to
- that all important clock chip would be appreciated...
-
- Cheers.....
-
- ---- Robb ----
-