Knowledge Base

CMD PCI-0646U Accessed in Compatibility Mode in OSR2

Article ID: 170324

Article Last Modified on 6/5/2006

Microsoft Windows 95
Microsoft Windows 95

This article was previously published under Q170324

SYMPTOMS

When you use an IDE controller based on the CMD PCI-0646U chip set in Windows 95 OEM Service Release 2 or 2.1 (OSR2), the controller is not recognized, protected-mode drivers are not loaded, and the controller is accessed in Compatibility (BIOS) mode.

CAUSE

The CMD PCI-0646U chip set uses some control registers in a different manner from earlier models of CMD controllers. The Windows PCI driver accesses these registers in a way that causes it not to recognize this controller.

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

Additional query words: 95 chipset

Keywords: kbqfe kbhardware kbprb kbhotfixserver KB170324