If you have a Pentium Pro I.e a i686, you have a few options. Debian, Slackware, Puppy Linux, Damn Small Linux and antiX are the first that come to mind. If you have an original Pentium you’re probably stuck with Tiny Core Linux.
Of course, you could also spend about $20 and get yourself a vastly more powerful computer like a RaspberryPi Zero.
What’s a good distro for this that is well supported?
You can go for a really minimal install of Arch or Gentoo with no DE
If you have a Pentium Pro I.e a i686, you have a few options. Debian, Slackware, Puppy Linux, Damn Small Linux and antiX are the first that come to mind. If you have an original Pentium you’re probably stuck with Tiny Core Linux.
Of course, you could also spend about $20 and get yourself a vastly more powerful computer like a RaspberryPi Zero.