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WDSC(4)                  BSD Kernel Interfaces Manual                  WDSC(4)

NAME
     wdsc -- WD33c93 SCSI controller

SYNOPSIS
     wdsc* at hpc?                     (sgi)

DESCRIPTION
     The wdsc driver provides support for the Western Digital WD33c93 and
     WD33c93B SCSI controllers.

     In addition to sending the required SCSI commands to target devices on
     the SCSI bus, the wdsc driver deals with DMA, device interrupts,
     sync/async negotiation, and target disconnects/reconnects.

DEVICE FLAGS
     Bits 0-7    Disable disconnect/reselect for the corresponding target
     Bits 8-15   Disable synchronous negotiation for target "[bit - 8]"
     Bits 16-23  Disable tagged queuing for target "[bit - 16]"

     The wdsc device flags may be OR'd together to enable any combination of
     the features listed above.  Tape devices should be allowed to disconnect
     for the SCSI bus to operate acceptably.

SEE ALSO
     hpc(4), intro(4), scsibus(4)

BSD                             March 18, 2014                             BSD