Epson 7500 User Manual download pdf (Page 50)

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.

Types of Memory

A computer’s memory is divided into three types:

conventional, reserved, and extended. The diagram below

shows the relationships between these types of memory and

their addresses.

Conventional

Resewed

memory

Extended

memory

640KB

1MB

Addresses

.32MB

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 memo y

(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.

Using Memo y

A-l

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Epson 7500 User Manual Page 50