From owner-freebsd-hackers Tue Jul 4 09:40:32 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id JAA29774 for hackers-outgoing; Tue, 4 Jul 1995 09:40:32 -0700 Received: from trout.sri.MT.net (trout.sri.MT.net [204.182.243.12]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id JAA29767 for ; Tue, 4 Jul 1995 09:40:29 -0700 Received: (from nate@localhost) by trout.sri.MT.net (8.6.11/8.6.11) id KAA03732 for hackers@FreeBSD.org; Tue, 4 Jul 1995 10:40:18 -0600 Date: Tue, 4 Jul 1995 10:40:18 -0600 From: Nate Williams Message-Id: <199507041640.KAA03732@trout.sri.MT.net> To: hackers@FreeBSD.org Subject: USENET:Pentium appendix H reverse engineered Sender: hackers-owner@FreeBSD.org Precedence: bulk Path: helena.MT.net!news.sprintlink.net!europa.chnt.gtegsc.com!news.mathworks.com!news.ultranet.com!zombie.ncsc.mil!news.duke.edu!ratatosk.yggdrasil.com!adam From: adam@adam.yggdrasil.com (Adam J. Richter) Newsgroups: comp.os.linux.development.system Subject: Pentium appendix H reverse engineered Date: 3 Jul 1995 22:53:11 GMT Organization: Yggdrasil Computing, Inc. Lines: 19 Message-ID: <3t9scn$18e@freya.yggdrasil.com> NNTP-Posting-Host: adam.yggdrasil.com The front page of the July 3, 1995 issue of _Electronic Engineering Times_ has an article "Pentium secrets revealed" by Alexander Wolfe, which claims at a Christian Ludloff, a programmer living in the former East Germany, has reverse engineered the appendix H information on programming the pentium and made it available by anonymous FTP from ftp://ftp.tu-chemnitz.de/pub/Local/msdos/4p_v302.zip According to the article, the registers mostly have to do with performance monitoring, but there is also support for four megabyte virtual memory pages, which could be used to improve hit rates on the translation lookaside buffer when running kernel code by mapping the the kernel into a single four megabyte page. -- Adam J. Richter Yggdrasil Computing, Incorporated (408) 261-6630 "Free Software For The Rest of Us."