Intel 64 and IA-32 Architectures Software Developers Manual Volume 1, Basic Architecture

Vol. 1 1-7
ABOUT THIS MANUAL
1.3.5 A New Syntax for CPUID, CR, and MSR Values
Obtain feature flags, status, and system information by using the CPUID instruction,
by checking control register bits, and by reading model-specific registers. We are
moving toward a new syntax to represent this information. See Figure 1-2.
Figure 1-2. Syntax for CPUID, CR, and MSR Data Presentation
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