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From: mats@infolog.se (Mats Lordin)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Can you speed up an old 6Mhz IBM-AT to 12Mhz?
Summary: Can you speed up an old 6Mhz IBM-AT to 12Mhz?
Message-ID: <190@infolog.se>
Date: 6 Jul 90 11:02:23 GMT
References: <6692@vax1.acs.udel.EDU> <57993@bbn.BBN.COM>
Organization: Infologics, Sollentuna, Sweden
Lines: 17

> In article <57993@bbn.BBN.COM>, sher@bbn.com (Lawrence D. Sher) writes:
> In article <6692@vax1.acs.udel.EDU> bach@vax1.udel.edu (Baskaran Subramaniam) writes:
> Is it possible to speed up an old 6Mhz IBM-AT (not a compatible) to 12Mhz
> by changing the crystal in it?

> We have an 80287/6Mhz and 512K RAM+1128K AST Rampage card in it. I think, the 
> RAM chips have a speed of 120ns.  Would changing the crystal create any problem
> with using these?  Do I have to change the '287 and the RAM chips also?  Do I
> have to change the '286 chip itself?

I believe there might be some problems forcing your 80286 to run at speeds in which
it was not designed for, the same might apply for the 80287.

Please correct me if I'm wrong.


-Madz