A new update is available for Fedora Core - Fedora Core 4 Update: microcode_ctl-1.12-1.24_FC4. Here the announcement:
Fedora Update Notification
FEDORA-2005-884
2005-10-03
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Product : Fedora Core 4
Name : microcode_ctl
Version : 1.12
Release : 1.24_FC4
Summary : Tool to update x86/x86-64 CPU microcode.
Description :
microcode_ctl - updates the microcode on Intel x86/x86-64 CPU's
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* Wed Sep 14 2005 Dave Jones <davej@redhat.com>
- Update to upstream 1.12 release.
* Wed Aug 17 2005 Dave Jones <davej@redhat.com>
- Check for device node *after* loading the module. (#157672)
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This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/4/
9eee1657c24912d89bf9a12dd61ebe5c SRPMS/microcode_ctl-1.12-1.24_FC4.src.rpm
63129f8fd32fb75758f1bed30f158b6f x86_64/microcode_ctl-1.12-1.24_FC4.x86_64.rpm
c9524bd73fd0440d89b0e7270b7d1968 x86_64/debug/microcode_ctl-debuginfo-1.12-1.24_FC4.x86_64.rpm
cab8cb098cb13d9663703263c089e72f i386/microcode_ctl-1.12-1.24_FC4.i386.rpm
021cef6d229cbf25d68ec1aea0ec933c i386/debug/microcode_ctl-debuginfo-1.12-1.24_FC4.i386.rpm
This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.