Appendix A Using Memory; Types Of Memory - Epson Progression 4 Setup Manual

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Appendix A

Using Memory

Your computer comes with 4MB of memory, and you may have

installed additional memory. This appendix describes how the

memory in your computer works and gives guidelines for

using the appropriate memory manager program to control

your memory.

A computer's memory is divided into three types:

conventional, reserved, and extended.

shows the relationships between these types of memory and

their addresses.

All memory in a computer is managed using addresses-

numbers that describe the location of each byte of data. Each

memory chip must have its own set of unique addresses so that

the operating system knows where to store and find data.

Conventional memory (also called base memory) is memory that

the operating system recognizes and manages directly. The size

of conventional memory is limited to 640KB and has addresses

in the range 0 to 640KB.

The diagram below

Using Memory A-1

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