Unrecognized USB device on A30-151 in XP

Question

After a clean install of WinXP Pro on a Satellite A30-151, a USB Device remains in the "Other" category (after installing audio, modem and graphics drivers) for which no drivers appear to be available on the drivers CD. At that point the "USB" category contains four entries, two standard "Universal Host Controllers" and two "OpenHost" controllers, all with default drivers.
I suspect the missing device may be a USB 2.0 "PCI to USB Enhanced Host Controller" from a further manufacturer, but Toshiba does not offer a driver for XP for this so it should be supported by the OS (?!).
Any suggestions as to what the device may be, and what drivers it requires?

Answer 1

Turns out XP only supports USB 2.0 as per SP1, so it seems a pre-SP1 version of XP Pro results in the native Windows drivers being unavailable. For anyone in a similar position, it looks as though either a) upgrading to SP1 or b) installing the hotfix Q312370 (
http://www.google.com/search?hl=en&q=Q312370_WXP_SP1_x86_ENU.exe
for the English version should throw up plenty of download locations) followed by autodetection of native Windows drivers should do the trick. However, the following SP1 issue may come into play
http://eu.computers.toshiba-europe.com/cgi-bin/ToshibaCSG/faq.jsp?service=EU&FID=TRO0000001c0d
in this case, the required original "NEC PCI to USB Enhanced Host Controller B1" driver can be found by searching for "USB driver" for "Windows 2000" for the Satellite A30 on the Toshiba driver download page.