Article ID: 825463 - View products that this article applies to.
This article describes how to increase the MS-DOS conventional memory in a virtual machine.
MS-DOS-based programs use some conventional memory to run, even when you run them in Windows. The conventional memory area is the 0K-640K section of memory. MS-DOS and typical program software use this area of memory.
If you try to run an MS-DOS-based program that uses more conventional memory than your computer currently has available, the program may not run correctly or at all. You may also receive an error message that says that there is not sufficient memory to run the program. When this behavior occurs, you must reconfigure your computer so that more conventional memory is available. To do so, edit the Config.sys file.
Note Back up the Config.sys file before you make any changes.
To edit the Config.sys file, use any of the following methods:
For additional information about how to increase conventional memory for MS-DOS-Based programs, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/134399/EN-US/ )How to Increase Conventional Memory for MS-DOS-Based Programs
(https://support.microsoft.com/kb/37242/EN-US/ )A General Tutorial on the Various Forms of Memory
(https://support.microsoft.com/kb/77083/EN-US/ )Optimizing Your Use of Upper Memory Blocks
(https://support.microsoft.com/kb/87165/EN-US/ )Command-Line Switches for MSCDEX.EXE
(https://support.microsoft.com/kb/151718/EN-US/ )Managing Memory in MS-DOS Mode
Article ID: 825463 - Last Review: September 10, 2011 - Revision: 3.0