3-112
INSTRUCTION SET REFERENCE
CPUIDCPU Identification (Continued)
When the input value is 1, the processor returns version information in the EAX register and
feature information in the EDX register (refer to Figure 3-27).
The version information consists of an Intel Architecture family identifier, a model identifier, a
stepping ID, and a processor type. The model, family, and processor type for the first processor
in the Intel Pentium
®
Pro family is as follows:
Model0001B
Family0110B
Processor Type00B
Figure 3-27. Version and Feature Information in Registers EAX and EDX
31
121187430
EAX
Family (0110B for the Pentium
®
Pro Processor Family)
Model (Beginning with 0001B)
13
14
Processor Type
Model
Family
Stepping
ID
Streaming SIMD Extensions
