What does HackerNews think of jimtcl?
Official repository of Jim Tcl, an open-source, small footprint implementation of Tcl
Libraries written for Jim Tcl became the foundation of Redis.
If you look at the examples, you'll find that writing a Chip8 emulator with JimTCL it's a breeze.
Edit: If this subthread got you interested, antirez's other Tcl projects are worth checking out. They are listed on his page on the Tcler's wiki: https://tcl.wiki/9497. I particularly recommend https://tcl.wiki/Picol, the tiny predecessor to Jim Tcl, and https://tcl.wiki/Sugar, a macro system for Tcl 8.4+. Disclosure: I maintain a somewhat larger fork of the former.
http://jim.tcl.tk/index.html/doc/www/www/index.html (source code is here: https://github.com/msteveb/jimtcl)
Now maintained by Steve Bennett, and actively used by some embedded folks.