Path: utzoo!utgpu!water!watmath!uunet!labrea!rutgers!mit-eddie!andante!att!icus!lenny
From: lenny@icus.islp.ny.us (Lenny Tropiano)
Newsgroups: unix-pc.general
Subject: Re: faster, Faster, FASTER
Message-ID: <493@icus.islp.ny.us>
Date: 16 Sep 88 23:39:30 GMT
References: <1185@umbc3.UMD.EDU>
Reply-To: lenny@icus.islp.ny.us (Lenny Tropiano)
Distribution: unix-pc
Organization: ICUS Software Systems, Islip, New York
Lines: 31

In article <1185@umbc3.UMD.EDU> alex@umbc3.UMD.EDU (Alex S. Crain) writes:
...
|>
|>	Has anyone played with the clock speed on the 3b1? The hardware seems
|>to be of excellent quality, and it seems like 12Mc shouldn't be unreasonable.
|>I think that the modem is on its own clock, and the power supply should be 
|>able to handle the extra load on a machine without expansion cards. 
|>I have an AC fan, so heat shouldn't be a problem...
|>

I'm not an electronic's guru, but the UNIX PC's have a MC68010L10 CPU chip
in them.  This information is from the Motorola Semiconductor book on
the 68010/68012 CPU's.   The MC stands of course of "Motorola Corporation", 
the 68010 is the CPU type, the L stands for the package type of 
"dual-in-line ceramic", and lastly the 10 stands for the clock-speed 
(ie. 10Mhz).  I believe the system would require you to change the CPU, 
as well as the appropriate crystal, to the MC68010L12 which runs 
at a frequency of 12.5Mhz.     "Dual-in-line" is the 64-pin rectangular
chip, as opposed to the 68-pin square Quad-Pack chip.

I wonder if this is feasible?  Comments from any hardware gurus?  :-)

-Lenny
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