October 7, 2006 OPL 4

### NAME

opl - Yamaha OPL2 and OPL3 FM MIDI synthesizer driver

### SYNOPSIS

opl* at cmpci? flags 1 opl* at esl? 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?

### DESCRIPTION

The 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.

### SEE ALSO

cmpci(4), esl(4), eso(4), ess(4), fms(4), isa(4), midi(4), sb(4), sv(4), wss(4), yds(4), ym(4)

### HISTORY

The opl device driver appeared in NetBSD1.4.

### BUGS

The OPL3 chip is operated in OPL2 mode despite being more capable.