ESP NCR 53c94 on-board or SBus SCSI interface
dma* at sbus? (SBus SCSI)
esp* at dma? (two flavours)
esp* at sbus? (depending on model)
esp is an on-board or SBus SCSI controller based on
the NCR 53c94 chip, found on some Sun UltraSPARC workstations.
- Bits 0-15
- Disable disconnect/reselect for the corresponding target
- Bits 16-31
- Disable synchronous negotiation for target "[bit - 16]"
OpenBSD support for 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.
first appeared in OpenBSD 3.0.