X:mmmm-nnnn represents a range of memory in hexadecimal to
be excluded from the EMM386.SYS page frame or other
mappable pages. This parameter is necessary only when there is
a conflict with your expansion option board. You can use more
than one X: parameter to exclude more than one range of
memory.
Mx indicates the address of the EMM386.SYS page frame. Do
not include this parameter unless you want to force
EMM386.SYS to use a particular address. The options for x are
shown below.
if x is
0
1
2
3
4
5
6
7
8
Using MS-DOS With Your Computer
3-34
C000
C400
C800
CC00
D000
D400
D800
DC00
EOOO