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Diffstat (limited to 'share/man/man4/man4.i386')
| -rw-r--r-- | share/man/man4/man4.i386/fdc.4 | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/share/man/man4/man4.i386/fdc.4 b/share/man/man4/man4.i386/fdc.4 index 7e744a2a184..410de11d68c 100644 --- a/share/man/man4/man4.i386/fdc.4 +++ b/share/man/man4/man4.i386/fdc.4 @@ -42,7 +42,7 @@ .Nd NEC765 compatible floppy disk driver .Sh SYNOPSIS .Cd "fdc0 at isa? port 0x3f0 irq 6 drq 2" -.Cd "fd* at fdc? drive ?" +.Cd "fd* at fdc? drive ? flags Z" .Sh DESCRIPTION The .Nm fdc @@ -74,16 +74,36 @@ The additional geometry types are as follows: .Pp The default geometry is the format specified in the BIOS, and is typically the largest supported format. +.Pp +Some floppy controllers do not respond correctly to probes, and +the configuration file +.Cm flags +field can be used to specify a particular drive type, overriding the +probed type. +If the 0x10 bit is on, the low order three bits of the +.Cm flags +field encode the drive type, as follows: +.Bl -tag -width xxxxxx -compact +.It 1 2.88MB +.It 2 1.44MB +.It 3 1.2MB +.It 4 720K +.It 5 360K +.It 6 1.2 MB japanese format +.El +.Pp +If the 0x20 bit is on, the drive will be attached even +if it was not found by the probe routine. .Sh BUGS The .Nm fdc -driver can interfere with other controllers namely some WD/SMC +driver can interfere with other controllers, namely some WD/SMC network controllers fail to work when the probing mechanism in the .Nm fdc driver probes for a missing second floppy drive. -In this case you should try recompiling the kernel with -the replacing the relevant line with +In this case you should try recompiling the kernel +replacing the relevant line with .Cd "fd0 at fdc? drive ?". .Sh SEE ALSO .Xr intro 4 , |