Model: AT-2000U Plus
Operating System: Windows 3.1 (Note: might work with other versions of this os.)
Before downloading: Run Free Scan for Instant Driver Updates
Allied Telesyn AT-2000U Plus Driver. I found this for my AT-2000U Plus NIC on the Allied Telesyn's website, but it's not working with mine, on win98se :/ but i upload it, maybe it'll work for you.