Epson 486SX - Manual (Page 15)

Optional Equipment
You can easily upgrade your computer by installing additional
memory and adding just about any optional device that is
compatible with the IBM Personal Computer, PC XT,
TM
or
PC AT®.
By adding memory modules to the memory card, you can
expand the computer’s memory up to 16MB.
If you have the 25 MHz model and want to speed up
mathematical calculations in certain application programs,
you can have your computer’s 80486SX microprocessor chip
replaced with an 80487SX, 25 MHz chip. This optional
microprocessor includes a built-in math coprocessor.
Check with your authorized Epson dealer for information on
optional equipment.
Operating Systems and Other Software
You probably chose a version of MS-DOS@ to use with your
computer. However, you can run another operating system,
such as OS/2, UNIX®, or XENIX®.
Note
This manual covers basic operating instructions for using
your computer, but does not explain how to install or use the
operating system. See your MS-DOS or other operating
system manuals for comprehensive instructions.
You can use virtually any application program designed for the
IBM PC, PC XT, PC AT, or compatible computers. You can also
use powerful 32-bit software, such as Microsoft Windows
TM
3.0
(or later), with your computer.
2 Introduction