In the battle for which operating system runs best on the $15 Laptop, Puppy Linux has pulled out front as the fastest system with the most features I need and best functionality on this 1999-era Compaq Armada 7770dmt.
Read it here
For some reason, the desktop wallpaper doesn't work. Instead, I have a plain, gray X Window background. And while JWM (Joe's Window Manager) is the default in Damn Small Linux like in Puppy, switching over to Fluxbox in DSL has been problematic. Some builds have allowed me to use the Fluxbox menu, but others don't seem to work at all.
And as far as speed goes, Puppy and DSL are quite equal on this hardware.