| pcm.4 (50846) | pcm.4 (53200) |
|---|---|
| 1.\" 2.\" Copyright (c) 1998, Luigi Rizzo 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" | 1.\" 2.\" Copyright (c) 1998, Luigi Rizzo 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/share/man/man4/pcm.4 50846 1999-09-03 15:11:43Z sheldonh $ | 26.\" $FreeBSD: head/share/man/man4/pcm.4 53200 1999-11-15 23:14:32Z phantom $ |
| 27.\" 28.Dd June 3, 1998 | 27.\" 28.Dd June 3, 1998 |
| 29.Dt PCM 4 i386 | 29.Dt PCM 4 |
| 30.Os FreeBSD 31.Sh NAME 32.Nm pcm 33.Nd FreeBSD audio device driver 34.Sh SYNOPSIS 35.Cd "device pcm0 at isa? port? irq 5 drq 1 flags 0x15" 36.Sh DESCRIPTION 37The --- 5 unchanged lines hidden (view full) --- 43.Pp 44Apart from the usual parameters, the flags field is used to specify 45the secondary DMA channel (generally used for capture in full duplex 46cards). Flags are set to 0 for cards not using a secondary DMA 47channel, or to 0x10 + C to specify channel C. 48.Pp 49PnP audio cards are also supported using the 50.Nm pnp | 30.Os FreeBSD 31.Sh NAME 32.Nm pcm 33.Nd FreeBSD audio device driver 34.Sh SYNOPSIS 35.Cd "device pcm0 at isa? port? irq 5 drq 1 flags 0x15" 36.Sh DESCRIPTION 37The --- 5 unchanged lines hidden (view full) --- 43.Pp 44Apart from the usual parameters, the flags field is used to specify 45the secondary DMA channel (generally used for capture in full duplex 46cards). Flags are set to 0 for cards not using a secondary DMA 47channel, or to 0x10 + C to specify channel C. 48.Pp 49PnP audio cards are also supported using the 50.Nm pnp |
| 51support which is available in FreeBSD starting from release 2.2.6. | 51support which is available in 52.Fx 53starting from release 2.2.6. |
| 52See the 53.Xr pnp 4 54manpage for more information. In particular, remember that unit 55numbers for (recognized) 56PnP cards are assigned after the legacy ISA devices, and that the 57actual resources (port, irq and drq) used by the driver are read from 58the PnP configuration and not from the "device pcm0" line. 59So, if you have the following line in your kernel config file: 60.Pp 61.Cd "device pcm0 ..." 62.Pp | 54See the 55.Xr pnp 4 56manpage for more information. In particular, remember that unit 57numbers for (recognized) 58PnP cards are assigned after the legacy ISA devices, and that the 59actual resources (port, irq and drq) used by the driver are read from 60the PnP configuration and not from the "device pcm0" line. 61So, if you have the following line in your kernel config file: 62.Pp 63.Cd "device pcm0 ..." 64.Pp |
| 63your first PnP audio card will be unit #1, i.e. it will be accessible 64as /dev/audio1, /dev/dsp1, etc. | 65your first PnP audio card will be unit #1, i.e. it will be accessible as 66.Pa /dev/audio1 , 67.Pa /dev/dsp1 , 68etc. |
| 65Many applications default to using /dev/audio, but appropriate 66symlinks will be created as a side-effect of the the following command: 67.Pp 68.Cd cd /dev 69.Cd ./MAKEDEV snd1 70.Pp 71The driver works best with WSS/MSS cards, which have a very clean 72architecture and an orthogonal set of features. They also happen to be --- 130 unchanged lines hidden --- | 69Many applications default to using /dev/audio, but appropriate 70symlinks will be created as a side-effect of the the following command: 71.Pp 72.Cd cd /dev 73.Cd ./MAKEDEV snd1 74.Pp 75The driver works best with WSS/MSS cards, which have a very clean 76architecture and an orthogonal set of features. They also happen to be --- 130 unchanged lines hidden --- |