Memblers is heavily working on a new NES cart. If you are a developer yourself, keep an eye out!

#NESdev prototype teaser: A new GTROM board variation enters testing phase this week, with (optional) compatibility with crappy NES clones, and has a fun new feature unique to this cart. More info will be posted as development continues.

via https://pdroms.de/nintendoentertainm...oment-nes-misc