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.
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.
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.
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