Undoing accidental commit.

BusLogic: Slightly enhanced debug info.

Devices: Windows build fix

Devices/Storage/DevFdc.cpp: eliminate use of vl_vbox.h

Storage/DevFdc: Initialize 'len' to zero at the beginning, safer.

Storage/DevFdc: Uninitialized variable warning.

DevFdc: Properly select head on seek.

DevFdc: Allow reformatting a floppy.

DevFdc: Improved logging.

DevFdc: Improve error reporting.

DevFdc: Added more cross-format media types.

DevFdc: Drive table comments, fail recal on missing drive.

DevFDC: Explicitly added a 1.2M 3.5in floppy type.

FDC: Change line is never set if no drive is selected.

FDC: Fail READ ID if no disk in drive.

FDC: Clear interrupts the way real FDCs do.

BIOS,DevFdc,DrvBlock: The floppy controller should query the block/host driver for the drive type, or it'll all go real bad if the guest code trusts CMOS/BIOS drive info. Changed the block driver to automatically upgrade the drive type (for fdc and bios/cmos setup only) if the image is larger than the configured drive capacity. Introduced two fake drive types with max capacities, 15.6 MB and 63.5 MB, the first is the max that INT13 can officially access, the second is reinterpreting CL as holding an 8-bit wide sector number and no cylinder bits (which actually seems to be how real bioses work with floppies).

DevFDC: Do not read sector 0.

warning

Update PDMDEVREG initialization comment so they refer to pfnMemSetup instead of pfnIOCtl.

DevFdc.cpp: Cleanups.

fdc.c -> DevFdc.cpp.