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Technical information
2 ports are used to control the MIDI soundcard: &FEAC for data, and &FEAD for control and status.
3 ports are used to control the OPL3 soundcard: &FEBC and &FEBE are register select ports, and &FEBD is the data port.
Datasheets
- Dream SAM2695 Datasheet for the S2P soundcard aka General MIDI
- Yamaha OPL3 Datasheet for the OPL3LPT soundcard aka Sound Blaster 16
- Yamaha OPL2 Datasheet for the OPL2LPT soundcard aka AdLib
- Philips SAA1099 Datasheet for the CMSLPT soundcard aka Game Blaster
- Texas instruments SN76489 Datasheet for the TNDLPT soundcard aka Tandy Sound