Microsoft KB Archive/136955

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Hang When Ejecting Audio CD with Panasonic CR-562B Drive

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Q136955

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The information in this article applies to:


 * Microsoft Windows 95

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SYMPTOMS
If you eject an audio CD from a Panasonic CR-562B CD-ROM drive while it is playing, your computer may stop responding (hang).

CAUSE
The Panasonic CR-562B CD-ROM drive is not completely compatible with the Windows 95 protected-mode disk drivers.

RESOLUTION
To work around this problem, load the real-mode drivers for the CD-ROM drive in the Config.sys and Autoexec.bat files. For information about the parameters for the real-mode driver and Mscdex.exe, please refer to the drive's documentation or manufacturer.

If loading the real-mode drivers for the CD-ROM drive does not resolve the problem, disable the protected-mode driver for the CD-ROM controller in Device Manager. To do so, follow these steps:


 * 1) In Control Panel, double-click the System icon.
 * 2) On the Device Manager tab, double-click the CD-ROM Controllers branch of the hardware tree to expand it.
 * 3) Click MKEPanasonic CD-ROM Drive, and then click Properties.
 * 4) Click the Original Configuration (Current) check box to clear it, and then click OK.

You may want to contact the drive's manufacturer to inquire about a possible firmware upgrade that corrects this problem.

MORE INFORMATION
The Panasonic CR-562B CD-ROM drive uses a proprietary interface and controller. The real-mode CD-ROM driver that is loaded in the Config.sys file for this drive varies, depending on the exact version of the Panasonic CD-ROM drive controller being used. If the real-mode CD-ROM driver being used is a driver that Windows 95 has determined it can safely take over, the Windows 95 protected-mode driver for Panasonic CD-ROM controllers is loaded. When this driver is loaded, the problem described in this article may occur.

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Technology : kbWin95search kbWin95