I have several AGP boards that was playing with while making my DOS station. Some of them were made with an S3 chip (Trio 3D[362], Trio 3D2X[368])and all of them suffer from the same effect: Many lines across the screen in text mode like the interferences produced by mobile phones just before they start ringing (Sure all of you some times have seen this kind of interferences). In graphics mode (Windows 3.11) there is an horizontal thin black line going continuosly from bottom to top.
Well. When I load USBUHCI{L}, all kind of interferences dissapear
What is producing this collateral effect? What kind of hardware tweack made USBUHCI{L} that corrects the image in my AGP card?