Appendix

43h

Test 8259 functionality.

44h

Reserved

45-46h

Reserved

47h

Initialize EISA slot

48h

Reserved

49h

1.

Calculate total memory by testing the last double word of each 64K

 

 

page.

 

2.

Program writes allocation for AMD K5 CPU.

4A-4Dh

Reserved

4Eh

1.

Program MTRR of M1 CPU

 

2.

Initialize L2 cache for P6 class CPU & program CPU with proper

 

 

cacheable range.

 

3.

Initialize the APIC for P6 class CPU.

 

4.

On MP platform, adjust the cacheable range to smaller one in case

 

 

the cacheable ranges between each CPU are not identical.

4Fh

Reserved

50h

Initialize USB

51h

Reserved

52h

Test all memory (clear all extended memory to 0)

53-54h

Reserved

55h

Display number of processors (multi-processor platform)

56h

Reserved

57h

1.

Display PnP logo

 

2.

Early ISA PnP initialization

 

 

-Assign CSN to every ISA PnP device.

58h

Reserved

59h

Initialize the combined Trend Anti-Virus code.

5Ah

Reserved

5Bh

(Optional Feature) Show message for entering AWDFLASH.EXE

 

from FDD (optional)

5Ch

Reserved

5Dh

1.

Initialize Init_Onboard_Super_IO switch.

 

2.

Initialize Init_Onbaord_AUDIO switch.

5E-5Fh

Reserved

60h

Okay to enter Setup utility; i.e. not until this POST stage can users enter

 

the CMOS setup utility.

61-64h

Reserved

65h

Initialize PS/2 Mouse

66h

Reserved

67h

Prepare memory size information for function call: INT 15h ax=E820h

68h

Reserved

69h

Turn on L2 cache

6Ah

Reserved

6Bh

Program chipset registers according to items described in Setup & Auto-

 

configuration table.

6Ch

Reserved

6Dh

1.

Assign resources to all ISA PnP devices.

 

2.

Auto assign ports to onboard COM ports if the corresponding item

 

 

in Setup is set to “AUTO”.

D-3

Page 95
Image 95
Intel FSB800 / DDR400 (PC3200), FSB800 (PC2700), FSB800 / DDR333 (PC2700), FSB533 Program writes allocation for AMD K5 CPU

DDR266 (PC2100), DDR333 (PC2700), DDR400 (PC3200), FSB400 (PC2100), FSB800 / DDR400 (PC3200) specifications

Intel's FSB800 (PC2700) and FSB800 (PC3200) represent important milestones in memory technology, providing enhanced data transfer speeds and improved performance for computing systems. The FSB, or Front Side Bus, is a critical component that connects the CPU to the memory, affecting both system efficiency and speed.

FSB800 (PC2700) offers a bus speed of 800 MHz, supporting DDR (Double Data Rate) memory. It operates at PC2700 specifications, which allow for a data transfer rate of 2.7 GB/s. This configuration is particularly advantageous for users requiring improved multitasking capabilities and faster data processing. The technology behind FSB800 also facilitates advanced power management, contributing to energy efficiency while maintaining high-performance levels.

On the other hand, FSB800 (PC3200) ups the ante with compatibility for DDR400 memory. This arrangement fundamentally increases the data transfer capabilities to 3.2 GB/s, making it suitable for more demanding applications such as gaming, video editing, and other resource-heavy tasks. The ability to leverage higher memory speeds not only enhances responsiveness but also allows for better handling of larger datasets.

FSB400 (PC2100) represents an earlier generation of Intel's bus technology, running at 400 MHz and supporting DDR266 memory. Although it has lower performance specifications, it still offers a reliable platform for basic computing tasks and is widely used in budget systems. This early iteration laid the groundwork for subsequent advancements in memory technology.

DDR400 (PC3200) is a prominent feature in high-performance desktops and workstations. It operates at a data transfer rate of 3.2 GB/s, maximizing the data paths between memory and processors. This level of performance is essential for high-fidelity graphics and complex computing processes, making it a popular choice among enthusiasts and professionals alike.

Lastly, FSB800 / DDR333 (PC2700) serves as a versatile option, particularly for systems that benefit from a balanced approach to speed and stability. By supporting DDR333, this configuration ensures adequate memory performance without overwhelming the system's architecture.

In summary, these various configurations provided by Intel—FSB800 (PC2700), FSB800 (PC3200), FSB400 (PC2100), and DDR400 (PC3200)—underscore significant advancements in memory speed and efficiency, catering to an array of computing needs from basic tasks to high-performance demands. With each iteration, Intel has focused on enhancing data transfer rates, supporting multitasking capabilities, and improving overall system responsiveness, solidifying its role as a leader in memory technology.