Cool to see this on HN today.

I'm currently using RetroArch in the browser along with the original Sony devkit and a custom hot-reload C dev server to develop a PS1 game engine. I started with EmulatorJS but ran into issues with its prebuilt cores while trying to get audio streaming working, and decided to just work with libretro directly.

It's been a blast. I didn't know much about developing on the PS1 and it's been fun playing code golf and trying to squeeze a more modern engine out of its tiny 2MB RAM and 33.8MHz CPU.