Epson EL 486UC - Manual (Page 74)

10. Run SETUP to enable the External Cache option and
check that the System shadow and Video shadow
options are enabled. You select these options from the
Advanced System Setup menu. Make sure you save your
settings as you leave SETUP (see Chapter 2).
When the computer restarts, it displays the amount of external
cache you have installed on the system.
Upgrading the Microprocessor
You can upgrade your computer by replacing the
microprocessor with a faster one. The following table lists the
components you can use to upgrade the microprocessor in
your system.
Microprocessor upgrade components
* For the DX/33 processor
** For the DX2150 and DX2166 processors
Use the following table to identify the general steps you need
to perform to upgrade your microprocessor. Then see the page
listed in the final column for instructions on performing those
steps.
4-26 Installing and Removing Options