ESP(4)               OpenBSD Programmer's Manual (SPARC64)              ESP(4)

NAME
     esp - ESP NCR 53c94 on-board or SBus SCSI controller

SYNOPSIS
     dma* at sbus? slot ? offset ? (SBus SCSI)
     esp* at dma?                  (two flavours)
     esp* at sbus? slot ? offset ? (depending on model)

DESCRIPTION
     The esp is an on-board or SBus SCSI controller based on the NCR 53c94
     chip, found on some Sun ULTRAsparc workstations.

DEVICE FLAGS
     Bits 0-7 disable disconnect/reselect for the corresponding target

     Bits 8-15 disable synchronous negotiation for target [bit - 8]

     The esp device flags may be OR'd together to enable any combination of
     the features listed above.  Targets 4 through 7 typically have discon-
     nect/reselect enabled on the premise that tape devices normally have one
     of these targets.  Tape devices should be allowed to disconnect for the
     SCSI bus to operate acceptably.

SEE ALSO
     isp(4), scsi(4)

HISTORY
     OpenBSD support for the esp first appeared in OpenBSD 3.0.

OpenBSD 3.0                     October 8, 2001                              1
