emm386 MS-DOS Command

Type: External (5.0 and later)


EMM386 [on|off|auto] [w=on|off] Purpose: Enables or disables EMM386 expanded-memory support on a computer with an 80386 or higher processor. Do not use this command when Windows is running.


The EMM386 device driver, EMM386.EXE, provides expanded-memory support as well as access to the upper memory area. In order to use the EMM386 command you must have an 80386 or higher processor and you must install the EMM386.EXE device driver by using the DEVICE command in your CONFIG.SYS file, otherwise the following message will be displayed: EMM386 driver not installed


on|off|auto – ON activates the EMM386 device driver, OFF suspends the device driver, and AUTO places the device driver into auto mode. Auto mode enables expanded-memory support only when a program calls for it. The default value is ON. w=on|w=off – ON enables Weitek coprocessor support. OFF disables Weitek coprocessor support. The default is w=off.


If you want to display the current status of EMM386 expanded-memory support, enter, EMM386

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