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NetBSD 6.1.5 - man page for piixide (netbsd section 4)

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PIIXIDE(4)			   BSD Kernel Interfaces Manual 		       PIIXIDE(4)

NAME
     piixide -- Intel IDE/SATA disk controllers driver

SYNOPSIS
     piixide* at pci? dev ? function ? flags 0x0000

DESCRIPTION
     The piixide driver supports the Intel PIIX, PIIX3, PIIX4, and 82801
     (ICH/ICH0/ICH2/ICH3/ICH4/ICH5/ICH6/ICH7/ICH8/ICH9/ICH10) IDE/SATA controllers and provides
     the interface with the hardware for the ata(4) driver.

     The 0x0002 flag forces the piixide driver to disable DMA on chipsets for which DMA would
     normally be enabled.  This can be used as a debugging aid, or to work around problems where
     the IDE controller is wired up to the system incorrectly.

SEE ALSO
     ata(4), atapi(4), intro(4), pci(4), pciide(4), wd(4), wdc(4)

BUGS
     The timings used for the PIO and DMA modes for controllers listed above are for a PCI bus
     running at 30 or 33 MHz.  This driver may not work properly on overclocked systems.

BSD					  July 30, 2010 				      BSD
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