Processor Subsystem; Pci Local Bus - NEC PowerMate V486 Series Manual

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Processor Subsystem

PowerMate V486 Series systems use a powerful 486DX2
or DX4 microprocessor.
The 486DX2 processor has a clock doubler which lets the
processor's internal clock run at twice the external clock
speed.
The "4" in DX4 indicates that the chip is a 486 processor.
The DX4 processor has a clock tripler which lets the
processor's internal clock run at three times the external
clock speed.
To take full advantage of microprocessor capabilities, the
system board design provides overall system balance.

PCI Local Bus

The industry-standard PCI bus is a highly-integrated
input/output (I/O) interface that offers the highest
performance local bus available for the 486-based
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 bottle-
necks found in traditional systems, maintains maximum
performance at high clock speeds, and provides a clear
upgrade path to future technologies.
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