Managed to find a PianoBox synthesizer from miditech. It has a SAM9733 with CleanWave32 (at least to my ears...) @ 4Mbits rom. Sounds nice in some games and a bit off in others.
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Inside we can find a Dream SAM 9733 daughterboard. Probably the 2 connectors are for power+ttl uart (J2), and audio out (j1) . Maybe it could be adapted to a waveblaster interface. All for the low price of 25€.
Also found a beautiful Music Quest MQX-16S @ amibay. It was missing the breakout cable, but I managed to fabricate my own, and @ 50€ plus shipping I cant really complain.
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Cant find any manual for this card, and info on it is scarce. It is somewhat similar to the more common IH9MQ9, but the MCU is odd (same family but different pinout/ports). Can one use the firmware from the more common PCMIDI ? Anyone know if there is a more recent eprom version for this card?
PS: you can find my cards dump here https://archive.org/details/mqx-16-s-27-c-128-ver-s-4-009
Found also a cool motherboard, the Elitegroup FX3000. It is capable of using either 386 or 486 cpu's and has a vendor specific local bus.
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Sellers photo...... Expecting some trouble.... just noticed a missing eprom (-‸ლ) .