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EMM386.EXE
The EMS memory manager provided with your computer,
EMM386.EXE, conforms to version 4.00 of the
Lotus/Intel/Microsoft Expanded Memory Specification
(
EMS). EMM386.EXE enables areas of system memory to be
used as Expanded memory.
The
EMM386.EXE device driver must be installed before you
can use Expanded memory. To install
EMM386.EXE in its
simplest form, include the following command line in your
CONFIG.SYS file before any other DEVICE commands that use
Expanded memory (for example,
RAMDRIVE.SYS) but after
the
HIMEM.SYS command line. This allows other device
drivers to use the memory manager.
DEVICE=C:\DOS\EMM386.EXE [options]
Parameters (also called switches or options) for the
EMM386.EXE driver are described in the Microsoft Windows
User’s Guide furnished with your new computer. After it
loads, the memory manager determines the amount of
Expanded memory in the system and performs any
required initialization.
n
Note: The 386 enhanced mode of Microsoft Windows allows
you to simulate part of extended memory as expanded
memory using the
EMM386.EXE device driver. However, this
is not recommended as it degrades system performance.
MS-DOS also uses EMM386.EXE to enable Upper Memory
Area (
UMA). This allows you to load TSR programs and
device drivers in this area to free up conventional memory.
Again, this may degrade performance. Refer to your
Microsoft Windows User’s Guide or your MS-DOS User’s
Guide for details.
Memory Device Drivers
F-6 Configuring Memory