Nice system; the CPU has the MMU and FPP, you've got what's probably a 256KB memory card (an NS23M - documentation is available - depending on the chips, it can be 64KB or 256KB - if the former, let me know, I'll swap you a 256KB one), and I think the pair of quad cards are probably an RLV11. Not sure what that off-brand dual card is - maybe a ROM of some sort? I wonder what the card on top in the chassis is? It looks like it has way too many chips on it to be just a power supply board - but I can't figure out what it could be. Anyone know? Noel