Epson 386SX - Manual (Page 266)

Main system board
The board built into your computer which contains 1MB of
memory and the circuitry the computer requires to operate.
Math coprocessor
An optional device that enables the computer to process certain
mathematical calculations faster.
MCGA
Monochrome/Color Graphics Adapter. A type of display
adapter that runs either a monochrome or color graphics
monitor.
Megabyte (MB)
A unit used to measure storage space in a computer’s memory or
on a disk. One megabyte equals 1024KB.
Megahertz (MHz)
A unit used to measure oscillation frequency (of a computer’s
internal timing clock). A megahertz is one million cycles per
second. The Equity 386SX operates at 16 MHz or simulates an
8 MHz operating speed.
Memory
The area where your computer stores data. Memory contents
can be permanent and inalterable (ROM) or temporary
(RAM).
Memory module
A small circuit board with an edge connector that contains
memory chips. You can add 256KB or 1MB memory modules to
the SIMM card inside the Equity 386SX to expand the
computer’s memory. A memory module is commonly called a
SIMM (single inline memory module).
12 Glossary