July 2004
Intermediate to advanced
1744 pages
35h 3m
English
Content preview from The Unabridged Pentium 4 IA32 Processor GenealogyBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Basic Request Types
Request Type 1
General
Request type 1 was introduced in the Pentium® processor and is supported by all subsequent IA32 processors (as well as the later 486 models). When the input value in EAX = 1 (i.e., request type 1), the processor returns the following items of information:
Prior to the advent of the Pentium® 4 processor, the information shown in Figure 59-2 on page 1448 is returned in EAX. With the advent of the Pentium® 4 processor, the information shown in Figure 59-3 on page 1448 is returned in EAX. Table 59-2 on page 1449 defines the processor type field values.
Figure 59-2. CPUID Request Type 1 EAX Content (pre-Pentium® 4)
Figure 59-3. CPUID Request Type 1 EAX Content (Pentium® 4)
Table 59-2. Processor Type Field ...
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