| OPL(4) | Device Drivers Manual | OPL(4) | 
opl —
opl* at cmpci? flags 1
opl* at eso?
opl* at ess?
opl* at fms?
opl0 at isa? port 0x388
opl* at sb?
opl* at sv?
opl* at wss?
opl* at yds?
opl* at ym?
midi* at opl?
opl driver provides support for the Yamaha OPL2
  (YM3812) and OPL3 (YMF262) chips. The chips are FM synthesizers and are
  capable of producing a wide range of sounds.
Access to the device is through the MIDI driver.
The opl driver usually attaches to a sound
    card, but it can also sit directly on the ISA bus.
If “flags 1” is specified, the
    opl driver handles left and right channels of OPL3
    swapped. Use this flag if your device has such problem.
opl device driver appeared in
  NetBSD 1.4.
| January 3, 2009 | NetBSD 10.0 |