NEC POWERMATE ES Series, Инструкция по обслуживанию и справочник

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System Boards 4-9
Processor and Secondary Cache
The system uses an Intel Celeron or Pentium III processor with an internal clock speed of
500 MHz or higher (depending on type of processor).
The processors are advanced pipelined 32-bit addressing, 64-bit data processors 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 (128 KB for Celeron) of secondary write-back cache on the processor.
The processor is compatible with 8-, 16-, 32-, and 64-bit software written for the Intel386™,
Intel486™, Pentium, Pentium II, and Pentium III processors. The processor is installed in a
Socket 370 on the system board.
System BIOS
The PCI-compatible BIOS is contained in a 4-Mb flash memory device on the system board.
The BIOS provides Power-On Self-Test (POST), system Setup program, PCI auto-configuration
utility, and BIOS recovery code.
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:
!
BIOS upgrade is performed quickly and easily
! expense of replacing ROM BIOS chips is eliminated, so system maintenance costs are
reduced
! less chance of inadvertently damaging the system board than when physically replacing
ROMs
!
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 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 64 MB minimum and up to 512 MB maximum of SDRAM installed in
two DIMM sockets on the system board.
The DIMM sockets accept 168-pin, 64-bit (non-ECC) 64-, 128-, and 256-MB DIMMs. See the
“Sample DIMM Memory Upgrade Paths” table in Section 1 for a list of supported DIMMs.
Plug and Play
The system comes with a Plug and Play BIOS in support of Plug and Play technology. Plug and
Play simplifies setup procedures for installing Plug and Play expansion boards. With Plug and
Play, adding a Plug and Play expansion board is done by turning off the system, installing the
board, and turning on the system. There are no jumpers to set and no system resource conflicts
to resolve. Plug and Play automatically configures the board. (Some Plug and Play devices
might need to be jumpered if used in a system running the Windows NT

operating system.)