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esp(4/macppc) NCR 53c94 on-board SCSI interface
esp(4/sparc64) ESP NCR 53c94 on-board or SBus SCSI interface

ESP(4) Device Drivers Manual (macppc) ESP(4)

esp
NCR 53c94 on-board SCSI interface

esp* at macobio?

The esp driver provides support for the on-board NCR 53c94 SCSI controller found on many old world Apple Macintosh systems and clones.

intro(4), macobio(4), scsi(4)
August 14, 2012 OpenBSD-current