Date: Wed, 18 Jul 2001 20:08:15 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: freebsd-stable@FreeBSD.ORG Subject: Re: FreeBSD 4.3 and 6G RAM Message-ID: <20010718200814.A21971@student.uu.se> In-Reply-To: <m15Mut6-003pYeC@lyxys.ka.sub.org> References: <20010718185206.A94946@student.uu.se> <m15Mut6-003pYeC@lyxys.ka.sub.org>
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On Wed, Jul 18, 2001 at 07:13:28PM +0200, Wolfgang Zenker wrote: > > On Wed, Jul 18, 2001 at 09:23:18AM -0700, Tom wrote: > > > [..] > > > On Wed, 18 Jul 2001, Jonathan Belson wrote: > > > [..] > > > I believe the Xeon is the only x86 processor that can address more than > > > 4GB. > > > Nope. I just checked the online manuals at www.intel.com and all > > Intel's x86 CPUs since Pentium Pro can do this. (This includes Pentium > > Pro, Pentium II, Pentium III, Pentium 4 and the Xeon versions of them.) > > Actually Intel invented two different methods of using more than 4 GB > of physical memory: PSE36 (introduced with the Pentium Pro) and > PAE (introduced with Pentium II). Apparently all CPUs supporting PAE > also support PSE36. Close, but no cigar. PAE was introduced on the PPro and is supported on all subsequent Intel CPUs. PSE36 was introduced with the P3 and is available with the P3 and P4. For both methods the physical address space is 36 bits (64GB). -- <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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