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WDC(4)			 BSD Kernel Interfaces Manual			WDC(4)

NAME
     wdc — WD100x compatible hard disk controllers driver

SYNOPSIS
   ISA and ISA plug'n'play controllers
     wdc0 at isa? port 0x1f0 irq 14 flags 0x00
     wdc1 at isa? port 0x170 irq 15 flags 0x00
     wdc* at isapnp?

   Open Firmware ISA
     wdc* at ofisa?

   PCMCIA controllers
     wdc* at pcmcia? function ?

   arm32
     wdc0 at pioc? offset 0x01f0 irq 9

   atari
     wdc0 at mainbus0

   amiga
     wdc0 at mainbus0

DESCRIPTION
     The wdc driver provides the interface with the hardware for the ata(4)
     driver. This driver supports IDE and EIDE controllers, as well as MFM,
     RLL and ESDI on the ISA bus. PCI IDE controllers in legacy mode are also
     supported, but the pciide(4) driver may provide more functionality.

     On the ISA front-end, the following flags are supported:
	 0x0001	 Enables 32-bit I/O negotiation in the driver. This is known
		 to cause problems with some motherboards.
	 0x0002	 Don't probe for the second drive.
	 0x0004	 Set WDC_CAPABILITY_ATA_NOSTREAM flag.
	 0x0008	 Set WDC_CAPABILITY_ATAPI_NOSTREAM flag.

SEE ALSO
     ata(4), atapi(4), intro(4), isa(4), isapnp(4), mainbus(4), ofisa(4),
     pciide(4), pcmcia(4), scsi(4), wd(4)

BSD				October 8, 2003				   BSD

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