diff options
Diffstat (limited to 'share/man/man4/man4.alpha/ioasic.4')
-rw-r--r-- | share/man/man4/man4.alpha/ioasic.4 | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/share/man/man4/man4.alpha/ioasic.4 b/share/man/man4/man4.alpha/ioasic.4 new file mode 100644 index 00000000000..87a0ad4243b --- /dev/null +++ b/share/man/man4/man4.alpha/ioasic.4 @@ -0,0 +1,89 @@ +.\" $OpenBSD: ioasic.4,v 1.1 2017/11/02 14:04:24 mpi Exp $ +.\" $NetBSD: ioasic.4,v 1.4 2004/05/11 22:42:47 wiz Exp $ +.\" +.\" Copyright (c) 1996, 1997 Jonathan Stone. +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by Jonathan Stone. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 $Mdocdate: November 2 2017 $ +.Dt IOASIC 4 alpha +.Os +.Sh NAME +.Nm ioasic +.Nd +baseboard IO control ASIC for DEC TURBOchannel systems +.Sh SYNOPSIS +.Cd "ioasic0 at tc? slot ? offset ?" +.Sh DESCRIPTION +The +.Nm +driver provides support for the DEC proprietary IOCTL ASIC found on +DEC 3000 TURBOchannel machines. +.Pp +The +.Nm +provides hardware DMA channels and interrupt support for several +baseboard devices, including one +.Nm asc +SCSI device with a scatter/gather DMA channel, an mc146818-compatible +.Nm mcclock , +an Am7930 audio device +.Nm bba , +two +.Nm zs +dual-port serial devices, and a AMD 7990 LANCE +.Nm le +Ethernet interface. +.Pp +The +.Nm +is also used for the audio/ISDN hardware on +audio-equipped TURBOchannel Alphas, +where the +.Nm +hardware provides a scatter-gather DMA channel between the 16-bit +device and the 32-bit +.Nm tc +DMA address space. +.Pp +Support for scatter-gather DMA eliminates the need for additional copying. +.Sh SEE ALSO +.Xr asc 4 , +.Xr bba 4 , +.Xr intro 4 , +.Xr le 4 , +.Xr mcclock 4 , +.Xr tc 4 , +.Xr zs 4 +.Sh HISTORY +The +.Nm +driver +first appeared in +.Nx 1.1 , +derived from DECstation boot-time configuration code in +.Bx 4.4 . |