
WDC(4)                    OpenBSD Programmer's Manual                   WDC(4)

NAME
     wdc - WD100x compatible hard disk controller driver

SYNOPSIS
     wdc0 at isa? port 0x1f0 irq 14
     wdc0 at isa? port 0x170 irq 15
     wdc* at isapnp?
     wdc* at pcmcia? function ?
     wd* at wdc? drive ?

DESCRIPTION
     The wdc driver provides the basic functions for the wd(4) and atapisc-
     si(4) drivers.  It supports IDE and EIDE controllers, as well as MFM,
     RLL, and ESDI on the ISA bus.  PCI IDE controllers in legacy mode are al-
     so supported, but the pciide(4) driver may provide more functionality.

     For the ISA front-end, the 0x01 flag enables 32-bit I/O negotiation.
     This is known to cause problems with some motherboards.

SEE ALSO
     intro(4), pciide(4), scsi(4), wd(4)

OpenBSD 3.0                    October 15, 1998                              1
