486-OCV Plus
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Introduction
The 486-OCV Plus system board is designed so that it
may be equipped with Intel's 80486DX, 80486DX2,
80486SX, and 80486 OverDrive
TM
Processors which can
run from speeds of 25MHz to 66MHz. It may also use
a Pentium
TM
OverDrive Processor running at 50MHz or
66MHz. This Pentium-based system board is twice as
fast as the 80486DX-33 and accommodates almost all of
the existing programs designed for 386 or 486-based
systems. The system board also supports a Cyrix or
AMD 486DX CPU running at 40MHz.
The 486-OCV Plus is a jumperless-upgrade board
allowing you to easily upgrade your CPU from a 486SX
to 486DX or DX2 for example, without altering any
jumpers. However, if you change your CPU speed from
25MHz to 33MHz, 40MHz or 50MHz, or change a
Cyrix CPU to an Intel or AMD CPU, you may have to
alter a few jumpers.
The 486-OCV Plus is equipped with a Zero Insertion
Force socket to make upgrading your CPU easy. It also
supports an optional Flash EPROM. Flash EPROM is a
memory chip for the storage of BIOS which can be
erased in bulk or modified using a software utility.
The 486-OCV Plus system board is also equipped with
two VESA compliant local bus slots. The VL-Bus of
the 486-OCV Plus system board operates at the same
frequency (up to 40MHz) and phase as the CPU, sup-
porting all DMA and system I/O bus mastering cycles.
Introduction
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