Epson 486SX - Manual (Page 46)

Your computer automatically enables memory caching for the
640KB of base memory. For the memory above 1MB, the Setup
program allows you to turn extended memory caching on or
off. The default setting is on for all the extended memory
currently installed in your system from 1MB up to the
maximum.
Most of the time, you should cache all of your extended
memory to maximize the performance of your 32-bit computer.
However, if you install an optional memory card that “shares”
memory with any of your other system memory, you should
turn caching off in memory areas that are shared. See the
manual that came with your memory card to see if this is
necessary.
To check or change the extended memory cache setting, follow
these steps:
1. At the main Setup menu, highlight Cache memory. You
see the following cache memory table:
Extended memory caching
6 7 8 9 10 11 12 13 14 15MB+
The table indicates the range of extended memory currently
installed in your system. You see ON or OFF in the first
three areas because your computer comes with 4MB of
memory and the extended memory area from 1MB to 4MB
can be cached. If you installed additional memory, you see
ON
or OFF for each additional megabyte of memory you
have installed. The shaded areas indicate ranges of memory
that are not installed.
If your extended memory cache setting is correct, you can
skip the rest of this section.
2 - 1 2 Running the Setup Program