NEC VT 300i manual System Board Components, Component Function

The following table lists the major components on the system board.

System Board Components
Component	Function
Processor (mounted in a S.E.C.	Celeron
cartridge)	300-, 333-, 366-, 400-, or 433-MHz processor
	Pentium II
	350-, 400-, or 450-MHz processor
	Pentium III
	450- or 500-MHz processor
Intel 82440ZX AGPSet:
82443ZX AGP Host Bridge	Provides bus control signals, address paths, and data paths for
Controller (PAC)	transfers between the processor’s host bus, PCI bus, AGP
	connector, and system memory. The PAC comes in a 492-pin
	BGA package on the system board.
	Features include processor interface control (32-bit addressing,
	optimized for 100-MHz host bus frequency, supports 66 MHz
	bus frequency), an integrated DRAM controller (synchronous
	DRAM, 64/72-bit path-to-memory, auto detection of memory
	type) and an AGP interface (compliant with AGP specification
	with data transfer rates up to 133 MHz), fully synchronous
	minimum latency PCI bus interface (compliant with PCI
	specification with PCI-to-DRAM access greater than 100 MB
	per second).
82371EB PCI ISA/IDE Xcelerator	Functions as a PCI to ISA bridge; PCI IDE functionality; a USB
(PIIX4)	controller; integrated dual channel enhanced IDE interface with
	support for Ultra DMA/33; enhanced DMA controller; interrupt
	controller based on 82C59, with support for 15 interrupts; power
	management logic (sleep/resume and remote wake on LAN);
	real-time clock with 256-byte, battery-backed CMOS static RAM
	(SRAM); and 16-bit counters based on 82C54. The chip comes
	in a 324-pin BGA package on the system board.
Winbond Multi Super I/O W83977TF	The controller provides the following features:
controller	Multimode parallel port
	Centronics compatible (standard mode)
	Enhanced capabilities port (ECP)
	Enhanced parallel port (EPP)
	Two RS-232C serial ports
	Integrated 8042A keyboard controller
	Supports industry-standard floppy controller
Creative® ES1371/ES1373 PCI chip	Provides audio on system board.

System Board 4-11