This driver set works with all versions of Windows 9x and NT. In order to setup you card to work, besure to boot to DOS, run setup and use autosense (windows 9x). I had to use jumperless mode for NT. Use interrupt 3 and IO port 300H (its the default). After booting into NT, add the adapter using the network control panel. Make sure to set interrupt and IO port to the same as the card and select 'isa' as the bus type. Restart and you should be communicating.