Epson 320SX PLUS Manuel D’Utilisation

Using Expanded Memory Beyond 640KB

The Equity 320sx PLUS comes with 2MB of random access

memory. MS-DOS and your application programs that run

under MS-DOS use the first 640KB of memory. You can use
any memory above 1MB as extended memory (up to 16MB)

or expanded memory (up to 24MB).

Shadow RAM uses 128KB of the RAM available between

640KB and 1MB in your system (384KB). If you use the

shadow RAM feature, 256KB of this memory is available for
use as extended or expanded memory. If you do not use

shadow RAM, you can use all of the 384KB of RAM as
extended memory but only 256KB of it as expanded memory

(to allow room for the expanded memory page frame).

Expanded memory is required by certain programs (such as

Lotus l-2-3) that support the Lotus/Intel/Microsoft Expanded

Memory Specification (LIM 4.0 EMS). To take advantage of

expanded memory, you need to use a memory manager to
convert the computer’s extended memory to expanded
memory. If you do not have another memory manager, you
can use the one provided on your Reference diskette,
EMM386SX.SYS. Follow the steps given below.

Microsoft Windows comes with its own expanded memory

manager. Do not use EMM386SX.SYS (or the EMS Size

SETUP option) if you are installing Windows on your
system. See your Windows documentation for more
information.

1. Run the SETUP program to allocate the amount of

memory you want to use as expanded memory. See “EMS
Size” in Chapter 2 for instructions.

2. Copy the file EMM386SX.SYS from your Reference

diskette to the root directory of your hard disk (or the
Startup diskette).