Epson Apex 20020 - Manual (Page 43)

Follow the instructions below to verify or change the values for
the Setup options.
Changing the Amount of Memory
Your computer has two types of memory: main memory and
extended memory. The main memory in your computer is set at
640KB, which is the maximum value and is recommended for
most applications.
Note
Although your computer has 1MB of main memory, you can
access only 640KB; the computer uses the rest for other
purposes.
The value you set for the extended memory depends on the
total amount of memory available in your computer above the
1MB of main memory. This amount consists of any additional
RAM on an expansion card that you may have installed.
Note
Certain MS-DOS applications and other operating systems
may require extended memory. You can also use extended
memory to set up RAM disks for temparary storage, using
the VDISK.SYS driver. See your MS-DOS manual for
information regarding VDISK.SYS.
If you have changed the amount of memory in the computer,
follow these steps:
1. Highlight Memory and press Enter. This menu appears
on the screen:
640 KB Main
0 KB Expansion
** SAVE SETTINGS **
Running the Setup Program 2-3