Epson ActionNote 4SLC/33 User Manual - Page 50

Most MS-DOS commands, access RAM beyond lMB. This type of memory allows some

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Use of extendd memory requires a memory manager. Most versions of MS-DOS include a standard extended memory manager. If you are using MS-DOS, Windows, and other compatible programs, it is best to use one of the memory managers (such as HIMEM.SYS) that came with your software because these memory managers have been tested and proven reliable. Most MS-DOS commands and application programs cannot use extended memory directly. They need to use expanded memory, which uses a portion of reserved memory as a window to access RAM beyond lMB. This type of memory allows some MS-DOS applications to get around the 640KB size limitation. You control expanded memory with a memory manager (such as EMM386.EXE), which enables the computer to use extended memory as expanded memory. Using Your Computer 2-19

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Use of extendd memory requires a memory manager. Most
versions of MS-DOS include a standard extended memory
manager. If you are using MS-DOS, Windows, and other
compatible programs, it is best to use one of the memory
managers (such as HIMEM.SYS) that came with your software
because these memory managers have been tested and proven
reliable.
Most MS-DOS commands
and application programs cannot use
extended memory directly. They need to use
expanded memory,
which uses a portion of reserved memory as a window to
access RAM beyond lMB. This type of memory allows some
MS-DOS applications to get around the 640KB size limitation.
You control expanded memory with a memory manager (such
as EMM386.EXE), which enables the computer to use extended
memory as expanded memory.
Using Your Computer 2-19