OS for AT&T 6300

Well, an update on my AT&T 6300. First of all, thank you VERY much to everyone who responded with information on this little machine. It's quite fun. The machine (now named "Jon") has a new low-level formatted drive (the debug command was g=c800:5, fyi) and is humming along merrily on MSDOS 6.22. Unfortunately, my backup of the hard drive before format resulted in a bad backup, so I'm working to restore that but doubt I will be able to. On that note, what sort of OS do you recommend I run on it? Right now, I'm running DOS 6.22 and the program Conex which allows me to use it as a terminal for my Linux box via a serial cable. Is there a UNIX-ish type OS I could run? If so, does anyone have a copy to sell me? I thought about looking for an 8-bit ethernet card so I can get it online, but not sure if it is worth it...well, it's always worth it to get it online, but... :) Thanks, again, for all your help. Tarsi 210