Date: Tue, 4 Jul 1995 10:40:18 -0600 From: Nate Williams <nate@trout.sri.MT.net> To: hackers@FreeBSD.org Subject: USENET:Pentium appendix H reverse engineered Message-ID: <199507041640.KAA03732@trout.sri.MT.net>
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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."
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