freebsd-dev/sys/dev/fdc
Joerg Wunsch 1f97b64cbb Do not use "Enable Implied Seek" on enhanced floppy controllers. This
breaks the "2step" feature of the driver, e.g. in order to read 360
KiB media on a 1200 KiB drive.

As the only potential advantage of implied (vs. explicit) seeks is to
minimize the software effort, yet our driver always contained the
logic needed for explicit seeks, simply dropping implied seeks is the
best solution without introducing risks for new bugs.  There is no
performance penalty, reading a 1440 KiB medium takes exactly the same
time with both, implied or explicit seeks.

MFC after:	1 week
2013-08-24 21:04:54 +00:00
..
fdc_acpi.c Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays 2013-01-30 18:01:20 +00:00
fdc_isa.c
fdc_pccard.c Remove duplicate header includes 2011-06-28 08:36:48 +00:00
fdc.c Do not use "Enable Implied Seek" on enhanced floppy controllers. This 2013-08-24 21:04:54 +00:00
fdcvar.h