If nobody else volunteers I will probably try the povided rom dumps from that guy and try to adapt the existing portfolio device to that prototype, sadly there is not a lot of software for it as it never came to market.
It also seems to miss the expansion port, not sure what they planned as alternative inside
(someone mentioned pcmcia, but on a system without protected mode that would not make a lot of sense to me, though i am not too deep into the specs if this capability would have been mandatory to pcmcia)
Amazing Demo you found
I downloaded and checked its compatibility with Mame 0.246
gfx part works
missing sound completely in mame
i noticed that indeed sound does not seem to be emulated yet in mame, maybe the info from that smfx guy helps to implement something on that front