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author | charnier <charnier@FreeBSD.org> | 1997-07-15 09:44:05 +0000 |
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committer | charnier <charnier@FreeBSD.org> | 1997-07-15 09:44:05 +0000 |
commit | d6984ce0b4223309b7b300884d6575cde82c7325 (patch) | |
tree | d91abc2b387681141e7de980023883155c3599df /share | |
parent | 0715678100e6adeaef3cb5ff14b4836c683c0bcb (diff) | |
download | FreeBSD-src-d6984ce0b4223309b7b300884d6575cde82c7325.zip FreeBSD-src-d6984ce0b4223309b7b300884d6575cde82c7325.tar.gz |
Document the CMD640 option.
PR: kern/3742
Submitted by: helbig@MX.BA-Stuttgart.De
Diffstat (limited to 'share')
-rw-r--r-- | share/man/man4/man4.i386/wd.4 | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/share/man/man4/man4.i386/wd.4 b/share/man/man4/man4.i386/wd.4 index 009b9fe..c592eb7 100644 --- a/share/man/man4/man4.i386/wd.4 +++ b/share/man/man4/man4.i386/wd.4 @@ -24,7 +24,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.\" $Id$ +.\" $Id: wd.4,v 1.5 1997/03/07 02:50:00 jmg Exp $ .\" .Dd August 31, 1994 .Dt WD 4 i386 @@ -37,6 +37,9 @@ Generic WD100x/IDE diskcontroller driver .Cd "controller wdc0 at isa? port" \&"IO_WD1\&" bio irq 14 vector wdintr .Cd "disk wd0 at wdc0 drive 0 .Cd "disk wd1 at wdc0 drive 1 +.Pp +For the CMD640b IDE controller: +.Cd "options" \&"CMD640\&" .Sh DESCRIPTION This driver provides access to disks connected to controllers that emulate the Western Digital WD100x series. This range of controllers includes WD1003 @@ -69,6 +72,13 @@ sectors attempted is (flags & 0x00ff). The flags can be specified on the line for the drive as a 16 bit int, or on the controller line as a 32 bit int, where the top 16 bit is relevant to the highest numbered drive. +.Pp +The +.Dq Dv CMD640 +configuration option +enables a workaround for a deficiency of the CMD640b IDE controller. +If this option is enabled and the chip is detected by the PCI subsystem, +the primary and secondary controller will not be used simultaneously. .Sh FILES .Bl -tag -width Pa -compact .It Pa /dev/wd* |