asc man page on OpenBSD

asc man page on OpenBSD

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ASC(4)		       OpenBSD Programmer's Manual (VAX)		ASC(4)

NAME
     asc - VAXstation 4000 SCSI controller

SYNOPSIS
     asc* at vsbus? csr 0x200c0080 (VS4000/60 or VLC)
     asc* at vsbus? csr 0x25000080 (VS4000/9x)
     scsibus* at asc?

DESCRIPTION
     The asc driver provides support for the NCR 53c94-based SCSI host adapter
     on the VAXstation 4000 series, and for the PMAZ-AA and related
     TURBOchannel SCSI adapter option boards (also on the VAXstation 4000
     series models which include support for the TURBOchannel adapter.

CONFIGURATION
     The asc driver supports the following flags for use in config(8) files:

     bits 0-7:	  disable disconnect/reselect for the corresponding SCSI
		  target
     bits 16-23:  disable synchronous negotiation for SCSI target

     "Target" is synonymous with SCSI ID number.

     Note that SCSI tape drives should be allowed to perform
     disconnect/reselect or performance will suffer.

SEE ALSO
     cd(4), ch(4), intro(4), scsi(4), sd(4), st(4), uk(4)

HISTORY
     The asc driver first appeared in NetBSD 1.5.  It has been supported in
     OpenBSD since release 2.8.

OpenBSD 4.9			 July 3, 2010			   OpenBSD 4.9

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