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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.kei.com!news.mathworks.com!newsfeed.internetmci.com!news.dacom.co.kr!news.kreonet.re.kr!overload.lbl.gov!gracie.lbl.gov!jin From: jin@gracie.lbl.gov (Jin Guojun[ITG]) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Memory upgrade troubles... Date: 19 Sep 1995 00:09:17 GMT Organization: Lawrence Berkeley Laboratory Lines: 29 Message-ID: <43l1nd$c01@overload.lbl.gov> References: <ts-1609952006280001@mac.infodirekt.com> <43f62r$l3m@ulowell.uml.edu> <Pine.BSF.3.91.950917164316.26780B-100000@www.ee.itb.ac.id> NNTP-Posting-Host: gracie.lbl.gov On 16 Sep 1995, David L. Goddard wrote: > >> Has anyone experienced trouble with freebsd when >> upgrading from 8M RAM to 16M RAM? >> After upgrading to 16M of RAM, I can boot freebsd and then: >> panic: page fault. >In most cases, the problem is on the newly added DRAM you use. >Maybe it has slower speed that it has to be. What is your CPU or motherboard? Most likely, it happens on 66 MHz bus MB. e.g. Pentinum66, Pentinum-100, or Pentinum-133. They require 60 ns memory. However, good 70 ns memory chips can do marginal working. If your motherboard uses Intel Triton PCI chipset, the problem is obvious. This is because Intel Triton PCI chipset really works in high speed. The new motherboards tend to use this chipset now, even Intel Triton II. Under this situation, the most memory module, such as SIMENS, OKIO, etc., will work on the marginal status. There are a very few memory will not work in this case. No one is wrong. You just need to use right memory chips. There is a easy way to test this problem. Put the suspect memory on the first bank, and run MS-DOS 6.22 highmem driver to test. If highmem test fails, then it will not work under BSD. -- /-------------- Jin Guojun ------------ v ---- Internet: g_jin@lbl.gov ----\ | Imaging & Distributed Computing | Usenet: ucbvax!g_jin@lbl.gov | | Lawrence Berkeley Laboratory | Bitnet: -- | | 50B-2239, Berkeley, CA 94720 - jin%george.lbl.gov@Csa3.LBL.Gov |