NAME    [Toc]    [Back]

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

SYNOPSIS    [Toc]    [Back]

     dma* at sbus? slot ? offset ?              (SBus SCSI)
     esp* at dma? flags 0x0000                  (two flavours)
     esp* at sbus? slot ? offset ?  flags  0x0000  (depending  on
model)
     scsibus* at esp?

DESCRIPTION    [Toc]    [Back]

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

DEVICE FLAGS    [Toc]    [Back]

     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 disconnect/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    [Toc]    [Back]

     cd(4), ch(4), intro(4),  isp(4),  sbus(4),  scsi(4),  sd(4),
ss(4), st(4),
     uk(4)

HISTORY    [Toc]    [Back]

     OpenBSD support for the esp first appeared in OpenBSD 3.0.

OpenBSD      3.6                          October     8,     2001