The Microcode Update Image
Introduction
When a Microcode Update must be applied to processors in the field, Intel® supplies system board manufacturers and/or BIOS vendors with a binary image referred to as a Microcode Update. This image is incorporated in the BIOS and has the format shown in Figure 25-1 on page 633. A Microcode Update image is exactly 2048d bytes in length and has the following basic composition:
The first 48d bytes comprises the Update Header data structure. The header contains information that identifies the target processor to which the update should be applied, as well as other information (refer to “The Microcode Update Header” on page 634).
The 2000d byte microcode binary image immediately follows the header data structure. ...
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