Epson Equity 386/33 PLUS Setup Manual page 10

Introduction
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The Epson Equity 386/33 PLUS is a high-performance
personal computer which offers exceptional speed and
convenience in a compact design.
Your 33 MHz, 80386DX system includes 4MB of internal
memory, a built-in VGA (video graphics array) display
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adapter, built-in parallel and serial interfaces, and an IBM
PS/2™ compatible mouse port. With these interfaces, you can
connect most of your peripheral devices directly to the
computer, without installing option cards.
The Equity 386/33 PLUS also has four option slots (three 16-bit
and one 8-bit) in which you can install additional devices, such
as a modem or a network card. It can support up to three
internal drives: either two diskette drives and one hard disk
drive, or one diskette drive and two hard disk drives.
The alternate VGA feature connector provides an interface to
connect an optional high-resolution graphics adapter card. This
allows you to use the special graphics features on the adapter
card while accessing the standard VGA signals provided by
your main system board.
Your system offers 128KB of shadow RAM to speed up
processing by moving the ROM BIOS and video ROM into the
RAM area of memory. Additionally, the 64KB of cache memory
lets the computer copy portions of memory into a high-speed
cache buffer so it can access programs and data very quickly.