MEM May Not Recognize More Than 16 MB RAM on NCR 4000 Series (109117)

The information in this article applies to:
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q109117


If you are using a National Cash Register (NCR) 4000 series (3350 class) Micro Channel Architecture computer and you run the MS-DOS MEM command, your system may not report extended memory over 16 megabytes.


To work around this problem, you must use the NCR Reference Disk to change your system's memory recognition feature from Standard to Max 64 MB. To do this:
    Insert the NCR Reference Disk in drive A and restart your system.
    At the main menu, choose Configuration.
    Choose Change, then choose Internal Options.
    Choose DOS MEMORY REPORTING and select Max 64 MB.
    Press the F10 key to save your changes.
    Press the ESC key until the system reboots.


The Standard option uses traditional BIOS calls to limit the memory that is reported to MS-DOS. Selecting the Max 64 MB option allows recognition of more than 16 MB (up to 64 MB).

The products included here are manufactured by NCR, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Modification Type: Major Last Reviewed: 11/19/1999
Keywords: KB109117