Hey Bret! I want to tell you that I was impressed with your work, because I did not know that you could get so many different usb devices to work under MS-DOS. I was impressed, really.
Maybe you can help me solve one problem. I have a ThinkPad 600 laptop. It has one USB port (UHCI) to which I plugged in a USB keyboard. Installed pure MS-DOS 6.22 (w/o Windows). After launching USBUHCI.COM and USBKEYB.COM, the keyboard works but has a lag. The keyboard is the most common, wired, without multimedia. There are no parameters in the BIOS of the laptop and in the configuration program for setting up USB. If you connect to a USB flash drive, it works at normal (for USB 1.1) speed.
Tell me, please, maybe there are some parameters for the USBKEYB.COM program that allow you to eliminate the lag?