Compatibility Support Module

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Laurie Jarlstrom edited this page Nov 23, 2016 · 2 revisions

The Compatibility Support Module (CSM) provides services that allow a UEFI based firmware to support a legacy PC boot process.

The 16-bit CSM component programming interface is described in this file:

https://github.com/tianocore/edk2/raw/master/IntelFrameworkPkg/Include/Protocol/LegacyBios.h

The CSM specification document is available here:

http://www.intel.com/technology/framework/spec.htm - download the CSM Specification V.098

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