.\" $OpenBSD: opl.4,v 1.5 2001/10/05 14:45:53 mpech Exp $
.\" $NetBSD: opl.4,v 1.3 1998/09/08 11:59:48 augustss Exp $
.\"
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.Dd August 18, 1998
.Dt OPL 4
.Os
.Sh NAME
.Nm opl
.Nd Yamaha OPL2 and OPL3 FM synthesizer driver
.Sh SYNOPSIS
.Cd "opl*  at ess?"
.Cd "opl0  at isa? port 0x388"
.Cd "opl*  at sb?"
.Cd "opl*  at wss?"
.Cd "midi* at opl?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the Yamaha OPL2 (YM3812) and OPL3
(YMF262) chips.
The chips are FM synthesizer and are capable
of producing a wide range of (mostly awful) sounds.
.Pp
Access to the device is through the MIDI driver.
.Pp
The
.Nm
driver usually attaches to a sound card, but it can also sit
directly on the ISA bus.
.Sh SEE ALSO
.Xr ess 4 ,
.Xr isa 4 ,
.Xr midi 4 ,
.Xr sb 4 ,
.Xr wss 4
.Sh HISTORY
The
.Nm
device driver first appeared in
.Nx 1.4 .