Knowledge Base

CardBus Cards Not Enumerated on Some PC Card Controllers

Article ID: 182591

Article Last Modified on 9/22/2005

Microsoft Windows 95
Microsoft Windows 95

This article was previously published under Q182591

SYMPTOMS

When you insert a CardBus PC Card in a computer running Microsoft Windows 95 OEM Service Release 2 (OSR2), the PC Card may not function properly.

CAUSE

This problem can occur when the CardBus PC Card is not enumerated properly. This issue is known to occur on computers that use the following PC Card controller chip sets:

Texas Instruments PCI1220
Texas Instruments PCI1221
Texas Instruments PCI1250
Texas Instruments PCI1250A

CLKRUN is a power-saving feature which turns off the clock signal to PC Cards when they are not in use. When this feature is implemented by the controllers listed above, these controllers do not automatically provide the number of clock cycles most PC Cards need in order to initialize.

RESOLUTION

STATUS

This problem no longer occurs in Windows 98. To resolve this problem, install the current version of Windows. For information about the current version of Windows, visit http://www.microsoft.com/windows.

MORE INFORMATION

You can use Device Manager to determine the chip set of your PC Card controller. To do this, follow these steps:

Click Start, point to Settings, click Control Panel, and then double- click System.
Click the Device Manager tab, and then double-click PCMCIA Socket branch to view the list of devices.

Additional query words: pcmcia card bus

Keywords: kbfix kbqfe kbhardware kbprb kbhotfixserver KB182591