Date: Sun, 29 Oct 2000 19:52:30 +0800 From: John Summerfield <summer@OS2.ami.com.au> To: freebsd-questions@freebsd.org Subject: Re: Page fault Message-ID: <200010291152.e9TBqUC07449@possum.os2.ami.com.au> In-Reply-To: Your message of "Sun, 29 Oct 2000 11:38:13 GMT." <3.0.3.32.20001029113813.01b8acf8@mail.btinternet.com>
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-------- > At 11:28 29/10/2000 +0100, you wrote: > >Hi. I'm trying to put more memory into my 486 DX2 computer. > >It's got 16MB at the moment (2 8MB 72 pin simms), but when I add one more > 8MB simm, the BIOS sees it, but the kernel panics at boot with a "page > fault" error. > >I really don't know where I should begin searching for the error here. Any > ideas? > > > You have to put simms in in pairs. > > This is due to the fact that the CPU can access the RAM faster than the ram > can respond and so the ram is accesses in an odd/even manner. One simm > first then the other and so on. Pardon me, I've just joined this list and have seen nothing previous to this in this thread. I have a 486DX that takes 72-pin SIMMs. One at a time is fine. OTOH I had one that took 30-pin SIMMS. That indeed required two at a time. I don't know the answer, but this sure doesn't sound like it. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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