You can choose and download your required driver free from these links.

http://www.driverskit.com/freedownload/Video_Card/Via/KN400_KM400_UniChrome_16_94_39_06/11372.html

http://www.jetway.com.tw/evisn/download/driver/index-1.htm

http://videodrivers.es/primary-bus-master-ide-controller-dual-fifo-driver/download-5268.html

Good Luck