Microsoft KB Archive/129327

= PCMCIA Device Requiring an Upper Memory Area May Not Work =

Article ID: 129327

Article Last Modified on 1/19/2007

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APPLIES TO


 * Microsoft Windows 95
 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q129327



If this article does not describe your hardware-related issue, please see the following Microsoft Web site to view more articles about hardware:

http://support.microsoft.com/default.aspx/w98?sid=460



SYMPTOMS
The PCMCIA card device in your laptop computer may not initialize properly.



CAUSE
Some PCMCIA devices require an upper memory area mapped to the PCMCIA socket for data buffering. If this memory region is in use by the computer's BIOS or a built-in device, the PCMCIA device does not respond when the Windows protected-mode socket driver tries to allocate the memory.

For example, if the computer's BIOS allocates memory for ROM shadowing in the upper memory area (UMA) and the socket driver tries to reallocate this memory, the PCMCIA device fails to initialize. A sample failure code for a PCMCIA network card experiencing this problem is "Problem 10."



RESOLUTION
To work around this problem, reserve the region of memory that is already in use. To do so, follow these steps:


 * 1) Click the Start button, point to Settings, then click Control Panel.
 * 2) Double-click the System icon.
 * 3) Click the Device Manager tab, then double-click Computer.
 * 4) Click the Reserve Resources tab, click the Memory option button, then click the Add button.
 * 5) In the Start Value and End Value boxes, enter values for the start and end of the memory range you want to reserve.
 * 6) Click OK.

After you restart your computer, Configuration Manager avoids using the reserved memory range when it allocates PCMCIA resources.

Additional query words: HWPCMCIA

Keywords: kbenv kbhardware kbprb KB129327

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