(This was the first Intel southbridge to support USB). I have been attempting to port over the USB code from the VIA southbridge (which to the best of my knowledge, was the first VIA southbridge to support USB, using the same standard as the Intel PIIX3 southbridge, which used UHCI 1.x) with modifications, to an emulation of the competing Intel PIIX3 southbridge (which I have been attempting to add to PCem) that is meant to be paired with the 430HX, 430VX and 440FX northbridges.
The USB support is present in the FIC VA-503+ motherboard and its VIA VT82C586B southbridge chipset, after installing Windows 95 OSR 2.5 for testing, in addition to the VIA 4-in-1 chipset drivers, as well as the official Microsoft USB Supplement for Windows 95 OSR2, the USB controller is detected and installed by Windows 95 (I haven't tested it in Windows 98 or later versions of Windows 9x, but I may test it in those operating systems at a later date) There is USB support in PCem, however it does not extend to adding interfacing with actual host ports of the same type (the same thing applies to the parallel and serial ports as well).
