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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New/Altered Exceptions
Exception 13d
Enhanced. The GP exception predates the Pentium® processor. Starting with the Pentium® processor, a GP exception occurs when an attempt is made to write a one into a reserved bit position of a special register:
Attempting to write a one into a reserved bit of CR4.
Attempting to write to a reserved bit in an MSR.
If CR4[PSE] = 1 (4MB Paging enabled) and the processor detects that any reserved bits in a PDE =1. These bits are checked during a write to CR0, CR3, or CR4.
Exception 14d
Enhanced. The Page Fault exception predates the Pentium® processor. Starting with the Pentium® processor, a Page Fault exception occurs when a one is detected in any of the reserved bits in a PTE or a PDE during linear-to-physical ...
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