HyperSpin (Is it Playable?): ETI-660 Learners' Microcomputer [MAME / RetroArch]

Deep within the bowels of MAME Sofware List I found this barely playable system. A computer you've never heard of and should immediately forget.
[Electronics Today International Magazine, Australia 1981]
Developed in New Zealand (by Hug 1802) and
upgraded by ETI as project 660, this simple state-of-the-art computer kit allows the hobbyist to get into micro-processors at minimal cost.