1.\" $OpenBSD: esp.4,v 1.9 2007/05/31 19:19:57 jmc Exp $ 2.\" 3.\" Copyright (c) 1998 The OpenBSD Project 4.\" All rights reserved. 5.\" 6.\" 7.Dd $Mdocdate: May 31 2007 $ 8.Dt ESP 4 sparc64 9.Os 10.Sh NAME 11.Nm esp 12.Nd ESP NCR 53c94 on-board or SBus SCSI interface 13.Sh SYNOPSIS 14.Cd "dma* at sbus? " Pq "SBus SCSI" 15.Cd "esp* at dma? " Pq "two flavours" 16.Cd "esp* at sbus? " Pq "depending on model" 17.Cd "scsibus* at esp?" 18.Sh DESCRIPTION 19The 20.Nm 21is an on-board or SBus SCSI controller based on the NCR 53c94 chip, found 22on some 23.Tn Sun 24UltraSPARC workstations. 25.Sh DEVICE FLAGS 26.Bl -tag -width "Bits XX-XX" -compact 27.It Bits 0-15 28Disable disconnect/reselect for the corresponding target 29.It Bits 16-31 30Disable synchronous negotiation for target "[bit - 16]" 31.El 32.Pp 33The 34.Nm 35device flags may be OR'd together to enable any combination of 36the features listed above. 37Targets 4 through 7 typically have disconnect/reselect enabled on the premise 38that tape devices normally have one of these targets. 39Tape devices should be allowed to disconnect for the SCSI bus to operate 40acceptably. 41.Sh SEE ALSO 42.Xr cd 4 , 43.Xr ch 4 , 44.Xr intro 4 , 45.Xr isp 4 , 46.Xr sbus 4 , 47.Xr scsi 4 , 48.Xr sd 4 , 49.Xr ss 4 , 50.Xr st 4 , 51.Xr uk 4 52.Sh HISTORY 53.Ox 54support for the 55.Nm 56first appeared in 57.Ox 3.0 . 58