esp4
Esp ncr 53c94 on-board or sbus scsi interface
Usage
dma* at sbus? (SBus SCSI) esp* at dma? (two flavours) esp* at sbus? (depending on model)
Overview
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.