Toss lingo about AGP technology around a computer video game player and they will think you're pretty smart. The RIVA 128 Video Adapter also won't work with the multi- display feature. Start the computer and boot-up Windows. There are a few further quirks with this technology. When you run DOS in full screen on the primary screen, you can't use your mouse on the secondary monitor.
Some programs hate dual monitor setups.
If you try to drag the program's window onto the secondary monitor, the program will hang. Graphics programs particularly resist. If you move a program window to the secondary monitor, that program will likely open in the secondary monitor the next time you start it. Musing on mouse niceties.