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System Board 4-11
System BIOS
The PCI-compatible BIOS is contained in a flash memory device on the system
board. The BIOS provides the Power-On Self-Test (POST), the system Setup
program, a 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 256 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- and 128-MB
SO-DIMMs. See “SO-DIMM Sockets” earlier in this section for a list of
supported SO-DIMMs.
Содержание POWERMATE 2000
Страница 14: ...1 System Overview Configuration Features Components ...
Страница 100: ...4 System Board Connectors Jumpers Sockets Components ...
Страница 114: ...5 Illustrated Parts Breakdown Ordering Parts Field Replaceable Unit List Illustrated Parts Breakdown ...
Страница 118: ...6 Preventive Maintenance System Cleaning Keyboard Cleaning Mouse Cleaning ...
Страница 121: ...7 Troubleshooting Checklist Diagnostics ...
Страница 131: ...8 NECC Information Services Service Telephone Numbers Technical Support Product Information ...
Страница 147: ...A Release Notes Applications System Configuration Display Capabilities Fix OS Restore Option ...
Страница 183: ...NEC Computers Inc 15 Business Park Way Sacramento CA 95828 www nec computers com 456 00130 000SRV 03 2000 ...