Processor And Secondary Cache; System Bios; System Memory - NEC POWERMATE 2000 Service And Reference Manual
Pentium iii 800-mhz or higher processor-based series
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Also See for POWERMATE 2000:
- Service and reference manual (183 pages) ,
- Service and reference manual (157 pages)
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Processor and Secondary Cache
The system uses an Intel Pentium III processor with an internal clock speed of 800 MHz or
higher.
The processor is an advanced pipelined 32-bit addressing, 64-bit data processor designed to
optimize multitasking operating systems. The 64-bit registers and data paths support 64-bit
addresses and data types.
To use the processor's power, the system features an optimized 64-bit memory interface and
256 KB of secondary write-back cache on the processor.
The processor is compatible with 8-, 16-, and 32-bit software written for the Intel386™,
Intel486™, Pentium, Pentium II, and Pentium III processors. The processor is mounted in a
Socket 370 connector. A heat sink is attached to the top of the processor for cooling.
System BIOS
The PCI-compatible BIOS is contained in a flash memory device on the system board. The
BIOS provides Power-On Self-Test (POST), system Setup program, PCI and IDE auto-
configuration utility, and BIOS recovery code.
The system BIOS is always shadowed. Shadowing allows any BIOS routine to be executed from
fast 32-bit DRAM on the system board, instead of from the slower 8-bit flash device.
The FLASH ROM allows fast, economical BIOS upgrades. The FLASH ROM is a
reprogrammable EPROM containing both the system and video BIOS.
Using the FLASH ROM to change the ROM BIOS provides the following advantages:
the BIOS upgrade is performed quickly and easily
!
the expense of replacing ROM BIOS chips is eliminated, so system maintenance costs are
!
reduced
there is less chance of inadvertently damaging the system board than when physically
!
replacing ROMs
new technology can be incorporated while maintaining corporate standards
!
network administrators can exercise company-wide control of BIOS revisions.
!
The BIOS programs execute the Power-On Self-Test, initialize processor controllers, and
interact with the display, diskette drive, hard drive, communication devices, and peripherals. The
system BIOS also contains the Setup Utility. The POST copies the ROM BIOS into RAM
(shadowing) for maximum performance.
The FLASH ROM allows the system and video BIOS to be upgraded with the BIOS Update
Utility, without having to physically remove the ROM (see Section 2 for further information on
the BIOS Update Utility). The FLASH ROM supports the reprogramming of the system BIOS
and the video BIOS.
System Memory
The system comes with between 64 MB and 512 MB of SDRAM installed in up to two
SO-DIMM sockets on the system board.
The SO-DIMM sockets accept 168-pin, 64-bit (non-ECC) 64-MB, 128-MB, and 256-MB
SO-DIMMs. See "SO-DIMM Sockets" earlier in this section for a list of supported SO-DIMMs.
System Board 4-9
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