System Board Components - NEC POWERMATE 8100 Series Service And Reference Manual

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4-Mb Flash ROM for fast economical BIOS upgrades
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PCI local bus for fast data transfer
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National Heceta LM80 chip for monitoring voltage, temperature, and
security (NEC MagicEye
T
integrated sound (Crystal audio system)
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power management with power saving mode, featuring inactivity timer
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AGP port on system board supporting an AGP board
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external connectors for connecting the following external devices:
Personal system/2 (PS/2
PS/2-style keyboard
Bi-directional Enhanced Parallel Port (EPP) and Enhanced
Capabilities Port (ECP) support for a parallel printer
Serial devices through two buffered 16C550 UART serial ports,
supporting up to 115.2 KB per second
Two USB devices
Speaker and microphone connectors (line in, line out, microphone in).
The following table lists the major components on the system board.
Component
Celeron Processor
or
Pentium II Processor
or
Pentium III Processor
Intel 440BX Chipset:
82443BX PCI/AGP controller (PAC)
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System Board Components

Function
300-MHz Celeron processor
333-MHz Celeron processor
266-MHz Pentium II processor
300-MHz Pentium II processor
333-MHz Pentium II processor
350-MHz Pentium II processor
400-MHz Pentium II processor
450-MHz Pentium II processor
450-MHz Pentium III processor
500-MHz Pentium III processor
Provides bus control signals, address paths, and data paths for
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,
66-MHz and 100-MHz host bus speed), 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).
System Board 4-11