[snvzz]

Software-only fantasy consoles are an interesting concept, covered by a sister comment.

There are also hardware-based efforts, like BoxLambda[0], Agon[1], MEGA65[2], Uzebox[3], F256[4].

0. https://epsilon537.github.io/boxlambda/

1. https://www.thebyteattic.com/p/agon.html

2. https://mega65.org/

3. https://uzebox.org/

4. https://wildbitscomputing.com/