Epson 486SX - Manual (Page 14)

Introduction
You’ve chosen a powerful, versatile Epson@ computer, ideally
suited for use in a network or as a high-performance personal
workstation.
Whether you have the 25 MHz model or the 50 MHz model
(with built-in math coprocessor), your system includes 4MB of
internal memory, a built-in VGA display adapter, built-in
parallel and serial interfaces, and an IBM® PS/2™ compatible
mouse port. These interfaces allow you to connect most of your
peripheral devices directly to the computer.
Note
The 25 MHz model has an 80486SX microprocessor and the
50 MHz model has an 80486DX2/50 microprocessor. The
instructions in this manual refer to both models, except
where specified.
Your computer has six option slots (five 16-bit and one 8-bit)
for installing additional devices, such as a modem or a network
card. Additionally, the computer supports up to five drives:
three externally-accessible drives and two internal drives.
Your computer offers several other outstanding features:
Memory caching copies portions of your system memory
into a high-speed cache buffer so your computer can access
programs and data very quickly.
Shadow RAM copies your system and video ROM into the
computer’s 32-bit RAM to further accelerate performance.
The built-in VGA adapter and VGA drivers support
extended graphics resolutions up to 1024 x 768 in 16 colors
or 640 x 480 in 256 colors on compatible monitors.
Introduction 1