Chipset; Pci Local Bus - NEC DIRECTION L Service Manual

High-performance features include:
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pipeline 32-bit addressing
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64-bit data
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512-KB of pipeline burst secondary cache; direct mapped write-back and
write-through organization.
Depending on the model, the system comes with 32 to 192 MB of main system memory.
Three sockets on the system board support up to 384 MB of high-speed memory using
industry-standard gold-plated dual in-line memory modules (DIMMs).
The system supports 60-ns Synchronous DRAM (SDRAM).
The system supports the following 60-ns configurations:
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1-Mbit by 64 or 72 (8-MB DIMM)
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2-Mbit by 64 or 72 (16-MB DIMM)
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4-Mbit by 64 or 72 (32-MB DIMM)
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8-Mbit by 64 or 72 (64-MB DIMM)
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16-Mbit by 64 or 72 (128-MB DIMM).

Chipset

The Intel 440LX chipset provides DMA, memory, and bus control. The chipset includes the
following chips:
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Intel 82443LX PCI/A.G.P. (PAC)
and data paths for transfers between the processor's host bus, PCI bus,
Accelerated Graphics Port (AGP), and main memory.
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Intel 82371AB PCI/ISA IDE Xccelerator (PIIX4)
bridge, PCI IDE functionality, Universal Serial Bus (USB) host/hub functions,
and enhanced power management.

PCI Local Bus

The 32-bit industry-standard PCI bus is a highly-integrated input/output (I/O) interface that
offers the highest performance local bus available for the Pentium II processor. The PCI bus
supports burst modes that send large chunks of data across the bus, allowing fast displays of
high-resolution images.
The high-bandwidth PCI local bus eliminates data bottlenecks found in traditional systems,
maintains maximum performance at high clock speeds, and provides a clear upgrade path to
future technologies.
Technical Information
provides bus-control signals, address paths,
implements the PCI-to-ISA
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