NEC PowerMate CT manual Processor and Secondary Cache, System Bios

System Board Components

Component	Function
Winbond Super I/O W83627HF- The controller supports the following:
AW controller	Industry-standard floppy controller
	Multimode parallel port
	Centronics compatible (standard mode)
	Enhanced capabilities port (ECP)
	Enhanced parallel port (EPP)
	Two RS-232C serial ports
	Two USB ports
	Integrated PS/2 keyboard and mouse controller
	One MIDI/Game port
	Hardware monitor
Yamaha Sound YMF 752-S	Audio integrated on system board, compatible with
	Windows Sound System

Processor and Secondary Cache

The system uses a Pentium III processor with an internal clock speed of 533 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 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 (POST), initialize processor controllers, and interact with the display, diskette drive, hard drives, communication devices, and peripherals. The system BIOS also contains the Setup Utility.

System Board 4-9