1.\" $OpenBSD: esp.4,v 1.12 2015/03/30 20:34:32 miod Exp $ 2.\" 3.\" Copyright (c) 1998 The OpenBSD Project 4.\" All rights reserved. 5.\" 6.\" 7.Dd $Mdocdate: March 30 2015 $ 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.Sh DESCRIPTION 18The 19.Nm 20is an on-board or SBus SCSI controller based on the NCR 53c94 chip, found 21on some 22.Tn Sun 23UltraSPARC workstations. 24.Sh DEVICE FLAGS 25.Bl -tag -width "Bits XX-XX" -compact 26.It Bits 0-15 27Disable disconnect/reselect for the corresponding target 28.It Bits 16-31 29Disable synchronous negotiation for target "[bit - 16]" 30.El 31.Pp 32The 33.Nm 34device flags may be OR'd together to enable any combination of 35the features listed above. 36Targets 4 through 7 typically have disconnect/reselect enabled on the premise 37that tape devices normally have one of these targets. 38Tape devices should be allowed to disconnect for the SCSI bus to operate 39acceptably. 40.Sh SEE ALSO 41.Xr cd 4 , 42.Xr ch 4 , 43.Xr intro 4 , 44.Xr sbus 4 , 45.Xr scsi 4 , 46.Xr sd 4 , 47.Xr st 4 , 48.Xr uk 4 49.Sh HISTORY 50.Ox 51support for the 52.Nm 53first appeared in 54.Ox 3.0 . 55