$NetBSD: pcppi.4,v 1.11 2009/03/09 19:24:28 joerg Exp $
Copyright (c) 1999
Matthias Drochner. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
.Dd March 22, 2005 .Dt PCPPI 4 .Os .Sh NAME .Nm pcppi .Nd PC (ISA) control port driver .Sh SYNOPSIS .Cd "pcppi* at acpi?" .Cd "pcppi* at isa?" .Cd "isabeep* at pcppi?" (alpha only) .Cd "sysbeep* at pcppi?" (i386 only) .Cd "spkr0 at pcppi?" .Cd "midi* at pcppi?" .Sh DESCRIPTION The .Nm driver handles resource allocation and device attachment for the ports related to the ISA speaker in the traditional PC/AT .Dq design . These are the .Dq system control port (which was implemented by the 8255 .Dq PPI in the XT, hence the name of this driver) at IO address 0x61.
Copyright (c) 1999
Matthias Drochner. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
.Dd March 22, 2005 .Dt PCPPI 4 .Os .Sh NAME .Nm pcppi .Nd PC (ISA) control port driver .Sh SYNOPSIS .Cd "pcppi* at acpi?" .Cd "pcppi* at isa?" .Cd "isabeep* at pcppi?" (alpha only) .Cd "sysbeep* at pcppi?" (i386 only) .Cd "spkr0 at pcppi?" .Cd "midi* at pcppi?" .Sh DESCRIPTION The .Nm driver handles resource allocation and device attachment for the ports related to the ISA speaker in the traditional PC/AT .Dq design . These are the .Dq system control port (which was implemented by the 8255 .Dq PPI in the XT, hence the name of this driver) at IO address 0x61.
p When associated with an .Xr attimer 4 device, it is possible to change the pitch of the sounds emitted through .Nm .
p The .Nm driver provides its child devices with the ability to output simple tones through the PC speaker. The .Xr speaker 4 and .Xr midi 4 devices use this to synthesize sounds. The .Xr isabeep 4 and .Xr sysbeep 4 devices are helpers which the .Xr pckbd 4 driver uses as a substitute for a .Dq keyboard beep , because the PC keyboard hardware doesn't provide this. .Sh SEE ALSO .Xr acpi 4 , .Xr attimer 4 , .Xr isa 4 , .Xr midi 4 , .Xr pckbd 4 , .Xr speaker 4
Indexes created Sat Sep 20 22:09:52 GMT 2025