5.The video memory uses one memory pool for two screen and Direct Draw application on Duo View mode in Windows 98. So activating the Direct Draw application which does not support that mode could cause fail in changing mode.
6.The program which does not have Duo View compatibility can not be used in the secondary monitor on Duo View mode.
7.The S3 video driver supports VPE (Microsoft video port specification) for multimedia function. So the programs using VPM (Cirrus logic video port specification) may not be supported.
8.Changing Duo View mode to Single View mode while you maximize the window of a program (such as Windows Explorer) could fail. Set the resolution of the secondary monitor lower than the primary monitor, or adjust the window size to smaller (not full screen).
9.When you use CRT and TV together as the same primary monitor or secondary monitor, the display size of the CRT is smaller than TV. The reason is that the frequency bandwidth is different from TV to CRT.
10.When you use Duo View mode, or a display device is set to secondary, the hotkey toggle does not work.
Using Duo View mode 97