Date: Sat, 22 Apr 1995 17:46:25 -0400 (EDT) From: "Rashid Karimov." <rashid@haven.ios.com> To: smace@metal-mail.neosoft.com (Scott Mace) Cc: hackers@FreeBSD.org Subject: Re: 2.x and large memory configs Message-ID: <199504222146.RAA03303@haven.ios.com> In-Reply-To: <199504220216.UAA04161@metal.ops.neosoft.com> from "Scott Mace" at Apr 21, 95 08:16:53 pm
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Hi there, > > Has anyone used FreeBSD 2 (or the snaps) with large mem configs like > around 128megs? (EISA or PCI bus). As far as I know only SNAPs older than 0210 will work with big amount of RAM I personally have PC with 128Mb RAM under 2.1Development (aka SNAPs). If you'll be able to fix source code in sys/src/sys/i386/i386/machdep.c near the lines saying : /* Use BIOS values stored in RTC CMOS RAM, since probing * breaks certain 386 AT relics. */ to fake stuff like : biosextmem = 129024; /* only the line wich deals with biosextmem */ /* should be changed */ instead of using the BIOS call to define amount of RAM installed , and #define LARGEMEM thru the option in config file for new kernel, you'll be set. The problem is that some PC brands report wrong amount of memory ( I have some 4 names in my collection of brain-dead brands , including well respected Gateway-2000, DELL , Micron ). > > Scott > If you plan to add extra RAM in the future ( and do have free SIMM slots :) - setup the amount to some really fantastic value ( 129024*2 will be nice ) - so the kernel will determine the amount of RAM kinda automatically. It scans the RAM till first invalid/nonexistent page and won't use the RAM addrs above that value. Rashid
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