of drivers for the card reader that was included in the laptop.

I went to the Dell support site once again and expanded the Chipset drivers. One of the items in the list was called Ricoh - Driver, which I promptly downloaded and installed. After installing the drivers I checked the device manager and noticed that the three unknown devices were now gone. I also had three new card reader devices installed, which were the three unknown devices.

As a side note the Dell Inspiron 6400 is also known as the E1505.

Summary

After installing XP on a Dell Inspiron 6400 I noticed that there were three unknown Base System Device entries in the device manager. After some quick research I learned that these devices were the Ricoh card readers. I downloaded the driver from the Dell support Web site and the three unknown devices disappeared and were replaced by the actual devices.

  Opendrivers.com help you understand that opendrivers.com accepts no responsiblility for the driver, Dell Inspiron 6400 notebook Ricoh R5C832 R5C833 R5C843 Driver 1.0.1 Windows Vista 32-bit/XP/2000 you will download in the site. we cannot guarantee you can download the full right driver from the driver download link and get the completely right information descriped above.