The Mx parameter specifies a particular address for the EMM386.SYS page frame. You specify the address by substituting a code for x from this table:
I x I Page frame begins at segment
For example, if you want EMM386.SYS to locate its page frame at the address C800, include this command in your CONFIG.SYS file:
DEVICE=EMM386.SYS M2
Do not use the Mx parameter unless you need to force EMM386.SYS to use a particular address.
Note
If you install devices that use expanded memory, be sure the DEVICE=EMM386SYS command appears in your CONFIG.SYS file before the commands to install those devices.
For more information on using EMM386.SYS, see your