Solution:

It is not necessary to install extra special driver under Window 95/98/NT. Because Window 95/98/NT provides standard communication driver and sharing interrupt function, just please follow the below steps to complete the installation: Step1: Please follow the below path and prepare to add a new port: [Start] => [Settings] => [Control Panel] => [Add New Hardware] Step2: Click [Next] and select [N] to give up searching new hardware automatically. Step3: Choose [Connection Port (COM & LPT)] item from the list. Step4: Follow the hints to complete manufacturer and type settings: [Standard Connection Port Type] for the left side. [Communication Connection Port] for the right side. Step5: Default IRQ and I/O Address will be shown. Just press [Next] and [Finish]. Note!! So far you have added a port to system with incorrect IRQ and I/O settings. You can repeat step1 to step5 to add as many ports as you want (Max. 128 port). Step6: After that, please try to modify the wrong settings about new ports: [Start] => [Settings] => [Control Panel] => [System] => [Device Manager] Step7: Select [Communication port] you desire to correct and double click. Step8: Choose [Resources] label and disable "Use automatic settings" item, then [Change settings] button is enabled. Step9: Focus on "Setting based on" and select "Basic configuration 8". Step10: Double click "Interrupt Request" and select proper IRQ, so does "Input/Output Range" Note: Please repeat Step6 to Step10 to setup IRQ and I/O address of each port correctly. Step11: Restart Window 95/98/NT to take new settings effect.