How to configure EMS on MS-DOS

I'm using Parallels Desktop Pro edition version 11.2.0 (32581) on OS X 10.11.4
and I want to setup msdos 6.22

to use ems, I edit my config.sys like this

Code:

DEVICE=C:\DOS\HIMEM.SYS
DEVICE=C:\DOS\EMM386.EXE EMS 1024
DOS=HIGH

booting my vm, an error appears like this
warning unable to set page frame base address--ems unavailable

How could I solve this prob?

 

Hi JinhoB, this message indicates that EMM386 was unable to find 64K of contiguous space needed for the expanded memory page frame. We suggest you to check this article.