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Line 56: </ref> starting with the [[Pentium Pro]] in 1995.<ref>{{cite magazine \|last=Gwennap \|first=Linley \|date=1997-09-15 \|title=P6 Microcode can be Patched \|url=https://www.ele.uva.es/~jesman/BigSeti/ftp/Cajon_Desastre/MPR/111204.pdf \|magazine=[[Microprocessor Report]] \|access-date=2017-06-26 }}</ref> This has allowed bugs in the [[Intel Core 2]] microcode and Intel [[Xeon]] microcode to be fixed in software, rather than requiring the entire chip to be replaced. Such fixes can be installed by Linux,<ref>[{{cite web\|url=http://urbanmyth.org/microcode/ "\|title=Intel Microcode Update Utility for Linux~~"] {{webarchive~~\|archive-url=https://web.archive.org/web/20120226174302/http://urbanmyth.org/microcode/ \|archive-date=2012-02-26 }}</ref> [[FreeBSD]],<ref>{{cite web\|url=http://www.freebsd.org/cgi/cvsweb.cgi/ports/sysutils/devcpu/ \|title=ports/sysutils/devcpu/ \|publisher=Freebsd.org \|date=2008-09-23 \|accessdate=2010-04-26}}</ref> Microsoft Windows,<ref>[http://support.microsoft.com/kb/936357 "A microcode reliability update is available that improves the reliability of systems that use Intel processors"]</ref> or the motherboard BIOS.<ref>[http://www.intel.com/support/motherboards/server/sb/cs-021619.htm "BIOS Update required when Missing Microcode message is seen during POST"]</ref> ===Timing, latching and avoiding a race condition===

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