Debian no longer supports Pentium, so neither does Antix. There are still Linux distros that will work on it. Adelie should. I think Arch32 as well. And Tinyco

Debian no longer supports Pentium, so neither does Antix. There are still Linux distros that will work on it. Adelie should. I think Arch32 as well. And Tinycore. I am not as sure about Slackware but I believe the single-core (non-SMP) kernel runs on Pentium.