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/* Technical information */
3 ports are used to control the OPL3 soundcard: &FEBC and &FEBE are register select ports, and &FEBD is the data port.
OPL3 offers 18 FM 2-op chans. Some of these can be paired to form up to 6 FM 4-op chans + 6 FM 2-op chans.
== Compatible Serdaco soundcards ==
