Hi I got 2 usb ibm/zircom usb cameras going at the same time last night on my desktop. The usb port on my desktop uses uhci, but my laptop uses ohci. For the most part the 2 cameras would only show images in 16 bits per pixel. Still, this is enough for me to do stereo robot vision tests. What is the difference between uhci and ohci? Ted -- Ted Huntington Programmer Analyst I Main Library University of California, Irvine PO Box 19557 Irvine, CA 92623-9557 emesgs: thunting@xxxxxxx web page: http://sun3.lib.uci.edu/~busoff/webpages/ted.htm 8:00a-12:00p Business Office (949) 824-8926 1:00p-5:00p Multimedia Resource Center (949) 824-1674