Using Expanded Memory Beyond 640KB

Your computer comes with 4MB of random access memory. MS-DOS and your application programs that run under MS-DOS use the first 640KB of memory. You can use the unused memory above 640KB as extended memory, or you can convert it to expanded memory, as described below.

Expanded memory is used by application programs (such as Lotus® 1-2-3®) 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 management program to convert the computer’s extended memory to expanded memory.

If you selected a memory management software package when you bought your computer, you can use it with any version of MS-DOS. Just follow the instructions included with the package.

If you are using MS-DOS version 4.01 or 5.0 and you did not get a memory manager, you can use the MS-DOS program EMM386.SYS or EMM386EXE (respectively) to convert your extended memory to expanded memory. See your MS-DOS manuals for instructions.

If you are using MS-DOS version 3.3 and you did not get a memory manager, ask your authorized Epson dealer which expanded memory manager program you should use.

4-12 Enhancing System Operations