sealisp
Lisp interpreter for the PSP + UNIX-clones.
... features are available:
* Some primitives for graphics on the PSP.
---
The PSP has no decent hot-swappable coding language, and it can't multi-task. Therefore, this interpreter supports Emacs-like multi-tasking on the PSP. See: Several frames+windows each running their own lisp program from a single core.