1) Remember that "SC1" that turned out to be a different version of SLC1? It's actually a modification of Poly-Computer 880. So I moved it over to the poly880.cpp driver.

2) There were some changes to MAME's lua core a few months ago, making Sandro's mame-chessengine plugin incompatible. He updated it yesterday (also includes compatibility with my MAME chess driver overhauls of lasth month): https://github.com/sronco/mame-chessengine

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