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QUESTIONS AND PROBLEMS 1. What is the size of the level 1 cache in the Pentium II microprocessor? 2. What sizes are available for the level 2 cache in the Pentium II microprocessor? (List all versions.) 3. What is the difference between the level 2 cache on the Pentium-based system and the Pentium II-based system? […]
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SUMMARY 1. The Pentium II differs from earlier microprocessors because instead of being offered as an integrated circuit, the Pentium II is available on a plug-in cartridge or printed circuit board. 2. The level 2 cache for the Pentium II is mounted inside of the cartridge, except for the Celeron, which has no level 2 […]
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THE PENTIUM III The Pentium III microprocessor is an improved version of the Pentium II microprocessor. Even though it is newer than the Pentium II, it is still based on the Pentium Pro architecture. There are two versions of the Pentium III. One version is available with a nonblocking 512K-byte cache and packaged in the […]
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PENTIUM II SOFTWARE CHANGES The Pentium II microprocessor core is a Pentium Pro. This means that the Pentium II and the Pentium Pro are essentially the same device for software. This section of the text lists the changes to the CPUID instruction and the SYSENTER, SYSEXIT, FXSAVE, and FXRSTORE instructions (the only modifications to the […]
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THE PENTIUM II, PENTIUM III, PENTIUM 4, AND CORE2 MICROPROCESSORS INTRODUCTION The Pentium II, Pentium III, Pentium 4, and Core2 microprocessors may well signal the end to the evolution of the 32-bit architecture with the advent of the Itanium1 and Itanium II micro- processors from Intel. The Itanium is a 64-bit architecture microprocessor. The Pentium […]
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QUESTIONS AND PROBLEMS 1. How much memory is accessible to the Pentium microprocessor? 2. How much memory is accessible to the Pentium Pro microprocessor? 3. The memory data bus width is in the Pentium. 4. What is the purpose of the DP0–DP7 pins on the Pentium? 5. If the Pentium operates at 66 MHz, what […]
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SUMMARY 1. The Pentium microprocessor is almost identical to the earlier 80386 and 80486 micro- processors. The main difference is that the Pentium has been modified internally to contain a dual cache (instruction and data) and a dual integer unit. The Pentium also operates at a higher clock speed of 66 MHz. 2. The 66 […]
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SPECIAL PENTIUM PRO FEATURES The Pentium Pro is essentially the same microprocessor as the 80386, 80486, and Pentium, except that some additional features and changes to the control register set have occurred. This section highlights the differences between the 80386 control register structure and the Pentium Pro control register. Control Register 4 Figure 18–17 shows […]
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INTRODUCTION TO THE PENTIUM PRO MICROPROCESSOR Before this or any other microprocessor can be used in a system, the function of each pin must be understood. This section of the chapter details the operation of each pin, along with the external memory system and I/O structures of the Pentium Pro microprocessor. versions: One version contains […]
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NEW PENTIUM INSTRUCTIONS The Pentium contains only one new instruction that functions with normal system software; the remainder of the new instructions are added to control the memory-management mode feature and serializing instructions. Table 18–3 lists the new instructions added to the Pentium instruction set. The CMPXCHG8B instruction is an extension of the CMPXCHG instruction […]
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