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ADW(4)			 BSD Kernel Interfaces Manual			ADW(4)

NAME
     adw -- Advansys PCI 16bit SCSI Host adapter driver

SYNOPSIS
     controller	pci
     controller	adw

     For one or	more SCSI busses:
     controller	scbus0 at adw0

DESCRIPTION
     This driver provides access to the	16bit SCSI bus connected to the	Ad-
     vanced Systems Products, Inc.  ASC3550 Ultra, and ASC38C0800 Ultra2, SCSI
     Host Adapter chips.  AdvanSys products incorporating these	chips include
     the ABP[3]940UW, ABP950UW,	ABP970UW, ABP3940U2W, and ABP3950U2W.  Both
     chips support, synchronous	transfers (20MHz and 40MHz max respectively),
     16bit transfers, tagged queueing, and up to 253 concurrent	SCSI transac-
     tions.

     Per target	configuration performed	in the AdvanceWare menu, which is ac-
     cessible at boot, is honored by this driver.  This	includes synchro-
     nous/asynchronous transfers, maximum synchronous negotiation rate,	wide
     transfers,	disconnection, tagged queueing,	and the	host adapter's SCSI
     ID.  The global setting for the maximum number of tagged transactions al-
     lowed per target is not honored as	the CAM	SCSI system will automatically
     determine the maximum number of tags a device can receive as well as
     guarantee fair resource allocation	among devices.

SEE ALSO
     adv(4), cd(4), da(4), sa(4), scsi(4)

AUTHORS
     The adw driver was	ported by Justin T. Gibbs from the Linux driver	writ-
     ten by Bob	Frey of	Advanced System	Products, Inc.	Many thanks to Advan-
     Sys for providing the original driver under a suitable license for	use in
     FreeBSD.

HISTORY
     The adw driver appeared in	FreeBSD	3.0.

BSD			       February	13, 2000			   BSD

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHORS | HISTORY

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