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UMC is also known for such things as:
- the 2A03 clone UA6527 which powered certain famiclones in the early 90s
- a very cheeky YM2413 clone, UM3567, which *improves* on the original Yamaha design by having a true DAC on the output stage rather than multiplexing the channels

the UM3567 offers a pretty bang-on implementation of Yamaha's OPLL, to the point it can be used in place of the YM2413 almost directly, only requiring a pin conversion and the removal of the original circuit's LPF on the output (because of the DAC)

the UM3567 however had a more native application... video gambling machines. So popular in numbers in fact, that these days it's easier to grab a new old stock UM3567 than it is to try to source a legitimate YM2413 still working.

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