After all I've read about USB, I still don't find anyone saying that USB mass storage ( via USBASPI.SYS + DI1000DD.SYS ), and USB mouse ( via UHCI.exe + OHCI.exe ), seem to be totally uncompatible !?... Is it true ? Is there a way to accomodate them ? Or is there another drivers solution to manage both ? Yann G

MS-DOS6.xx and compatable USB support is for Mass Storage & Optical Devices, AFAIK no other USB devices are supported........... I think you need to do more research as the following are the controller chips nothing to do with a specific device. USB 1.x UHCI (Universal Host Controller Interface) Intel, VIA USB 1.x OHCI (Open Host Controller Interface) Compaq, Microsoft and National Semiconductor USB 2.x EHCI (Enhanced Host Controller Interface) http://www.lvr.com/usb.htm There are several variations of USBASPI.SYS, the most stable is the latest from Panasonic which is USB1.x and 2.x compatible. http://83.67.55.228/usbfire.htm

Check out this page for DOS USB mouse support: http://www.stefan2000.com/darkehorse/PC/DOS/Drivers/USB/ Internet search engines are your friends. Morpheus: There is a difference between knowing the path and walking the path. "The Matrix"