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MESH(4) Device Drivers Manual (macppc) MESH(4)

mesh —
Macintosh Enhanced SCSI Hardware

mesh* at macobio? flags 0xffff

The mesh driver provides support for the onboard SCSI/2 (fast SCSI) controller found on many old world Apple Power Macintosh systems and clones.

Machines supported by the mesh driver include:

The mesh driver supports the following flags.
Bits 0-7:
Disable disconnect/reselect for the corresponding SCSI ID number.
Bits 8-15: Disable synchronous negotiation for the corresponding
SCSI ID number.

Disconnect/reselect should be enabled for tape devices, or SCSI bus performance may be degraded.

intro(4), macobio(4), scsi(4)

The mesh driver first appeared in OpenBSD 4.1.

No support for tagged queueing. Synchronous transfers and disconnect/reconnect are disabled by default.
August 14, 2012 OpenBSD-current