1.\" 2.\" Copyright (c) 1996 Jonathan Stone. 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.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. All advertising materials mentioning features or use of this software 14.\" must display the following acknowledgement: 15.\" This product includes software developed by Jonathan Stone. 16.\" 4. The name of the author may not be used to endorse or promote products 17.\" derived from this software without specific prior written permission 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29.\" 30.\" $NetBSD: sii.4,v 1.8 2001/07/08 17:22:54 wiz Exp $ 31.\" 32.Dd August 6, 1996 33.Dt SII 4 pmax 34.Os 35.Sh NAME 36.Nm sii 37.Nd 38SII SCSI adaptor 39.Sh SYNOPSIS 40.Cd "sii0 at mainbus0" 41.Sh DESCRIPTION 42The 43.Nm 44driver provides support for the 45.Tn DEC 46SII SCSI adaptor ASIC used in 47the DECstation 2100, 3100, and 5100, and in the VAXstation 3100. 48.Pp 49The 50.Nm 51is a medium-performance implementation of the SCSI-I common command set 52supporting synchronous and asynchronous SCSI devices. 53.Pp 54The SII cabling is unusual: the bulkhead connector is very similar 55to a standard submicro wide SCSI-II connector, but has the other gender. 56.Pp 57The 58.Nm 59chip only supports DMA to or from a fixed window in memory. 60The driver uses this "window" area as a bounce buffer, copying data 61to and from the DMA region. 62.Sh SEE ALSO 63.Xr intro 4 , 64.Xr rz 4 , 65.Xr tz 4 , 66.Xr sd 4 , 67.Xr st 4 , 68.Xr cd 4 , 69.Xr ch 4 70.Sh HISTORY 71The 72.Nm 73driver first appeared in 74.Bx 4.4 . 75.Sh BUGS 76The 77.Nm 78driver only supports the 79.Nm oldscsibus 80higher-level layer, and the 81.Nm rz 82and 83.Nm tz 84devices, which first appeared in 85.Bx 4.4 /pmax . 86It should be re-written to support the 87.Nm scsibus 88machine-independent higher-level SCSI layer and the 89.Nm sd , 90.Nm st , 91and 92.Nm cd 93drivers. 94This is 95.Ud . 96