DOS

Specifies that MS-DOS should maintain a link to the upper memory area, load 
part of itself into the high memory area (HMA), or both. You can use this
command only in your CONFIG.SYS file.

Syntax

    DOS=HIGH|LOW[,UMB|,NOUMB]

    DOS=[HIGH,|LOW,]UMB|NOUMB

Parameters

UMB|NOUMB
    Specifies whether MS-DOS should manage upper memory blocks (UMBs)
    created by a UMB provider such as EMM386.EXE. The UMB parameter
    specifies that MS-DOS should manage UMBs, if they exist. The NOUMB
    parameter specifies that MS-DOS should not manage UMBs. The default
    setting is NOUMB.

HIGH|LOW
    Specifies whether MS-DOS should attempt to load a part of itself into
    the HMA (HIGH) or keep all of MS-DOS in conventional memory (LOW). The
    default setting is LOW.

Related Commands

For information about loading a device driver into the upper memory area,
see the <DEVICEHIGH> command.

For information about loading a program into the upper memory area, see the
<LOADHIGH> command.