Program-Accessible Startup Features
See Table 36-4 on page 870 and Figure 36-10 on page 872. The processor's MSR_EBC_HARD_POWERON (EBC stands for External Bus Controller; i.e., the FSB Controller) register is a read-only MSR that indicates the state of the automatic configuration options that were automatically enabled or disabled on the trailing-edge of reset (when the processor sampled a subset of its pins).
Figure 36-10. MSR_EBC_HARD_POWERON MSR