MCGA

Multi-Color Graphics Array. This mode provides CGA compatibility as well as two-color 640 x 480 and 256-color 320x200 modes.

MDA

Monochrome Display Adapter. A type of display adapter that displays text in only one color, such as green or amber.

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/20 PLUS operates at 20 MHz or simulates an 8 MHz operating speed.

Memory

The area where your computer stores data. Memory contents can be permanent (ROM) or temporary (RAM).

Memory module

A small circuit board that contains memory chips. You can add 256KB, 1MB, or 4MB memory modules to the main system board inside the computer to expand the computer’s memory. A memory module is commonly called a SIMM (single inline memory module).

Memory on card

The additional memory on an option card installed in the computer.