NAME
esp —
ESP NCR 53c94 on-board or SBus SCSI
interface
SYNOPSIS
dma* at sbus? (SBus SCSI)
esp* at dma? (two flavours)
esp* at sbus? (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 0-15
- Disable disconnect/reselect for the corresponding target
- Bits 16-31
- Disable synchronous negotiation for target "[bit - 16]"
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
cd(4), ch(4), intro(4), sbus(4), scsi(4), sd(4), st(4), uk(4)
HISTORY
OpenBSD support for the
esp first appeared in OpenBSD
3.0.