Processor And Secondary Cache; System Bios - NEC POWERMATE 5100 Service Manual

Component
SMC FDC37C777 Super I/O
controller
Crystal Semiconductor CS4235

Processor and Secondary Cache

Some PowerMate 5100 Series systems contain a Celeron processor with an
internal clock speed of 266 MHz or 300 MHz.
Some systems contain an Intel Pentium II processor with an internal clock speed
of 233 MHz, 266 MHz, 300 MHz, or 333 MHz.
Both processors offer advanced pipelined 32-bit addressing, 64-bit data
processing designed to optimize multitasking operating systems. The 64-bit
registers and data paths support 64-bit addresses and data types.
Systems that contain a Pentium II processor feature an optimized 64-bit memory
interface and 512 KB of secondary write-back cache on the processor.
Both processors are compatible with 8-, 16-, and 32-bit software written for the
Intel386™, Intel486™, Pentium, and Pentium Pro processors. The Celeron and
Pentium II processors are mounted in S.E.C. cartridges with an attaching
heatsink that install as a unit in Slot 1 on the system board.

System BIOS

The ISA- and 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.
NEC's 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:
T
the BIOS upgrade is performed quickly and easily
System Board Components
Function
The controller provides the following standard I/O features:
Multimode parallel port
Centronics compatible (standard mode)
Enhanced capabilities port (ECP)
Enhanced parallel port (EPP)
Two RS-232C serial ports
PS/2 style mouse and keyboard interfaces
Single diskette drive interface
ISA Plug and play-compatible register set
PCI PME interface to PIIX4E
Intelligent auto power management
Provides audio on system board.
System Board 4-13