MESH(4)              OpenBSD Programmer's Manual (MacPPC)              MESH(4)

NAME
     mesh - Macintosh Enhanced SCSI Hardware

SYNOPSIS
     mesh* at macobio? flags 0xffff
     scsibus* at mesh?

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

     Machines supported by the mesh driver include:

           -   Power Macintosh 7600, 8500, 9500 and 9600.

DEVICE FLAGS
     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 per-
     formance may be degraded.

SEE ALSO
     intro(4), macobio(4), scsi(4)

HISTORY
     The mesh driver first appeared in OpenBSD 4.1.

BUGS
     No support for tagged queueing.  Synchronous transfers and disconnect/re-
     connect are disabled by default.

OpenBSD 4.7                      May 31, 2007                                1
