[ct-user] CT with USB ports

[Richard DiDonna NN3W]

My old trustworthy Toshiba satellite laptop died 
shortly before Christmas.

As a gift, the wife gave to me a new Dell Latitude 
X300.  Nice machine, but all of the ports are USB 
ports instead of the old style jacks and plugs.

Are there instructions available for simply using one 
USB port to serve as a CW keying interface for the FT-
990?  Haven't been able to find much online.

Thanks and 73

Rich NN3W