ROM initialisation vector now attempts to allocate a 2MB block using
PMM.  If successful, it copies the ROM image to this block, then
shrinks the ROM image to allow for more option ROMs.  If unsuccessful,
it leaves the ROM as-is.

ROM BEV now attempts to return to the BIOS, resorting to INT 18 only
if the BIOS stack has been corrupted.

work around limitations in real-mode virtualisation support on Intel
VT-capable chips.

us to round down the size for the relocation copy to the nearest 64kB
(+0x10 bytes); this just happened to work on most machines because the
last 64kB of the image is all-zeroes anyway (it's the .bss).

compressor fixup section.

start of the non-prefix blocks in the loaded image, and rely on the
image ordering.  This should make introducing compression much easier.

"rep movsb".

the Etherboot partition.

handle multiple sectors.

This reverts commit 844d088c51.

(including logical partitions).

This reverts commit 03ca71c38d.

(0x7ef4) tends to really screw up anything that loads at 0x7c00...

ISA 3c509 is currently non-functional, although the EISA (3c509-eisa) and
MCA (3c529) variants should build OK.

None of this code is yet tested.

clean separation between loading and starting, but does mean that more
PXE stacks survive the process.

do it.

allocation.

addresses if the signature checks fail.

we can never return to the PXE stack and must always use INT 18.

Record all information required for populating a struct undi_device.

Make debugging output more human-readable.

and call UNDI_SHUTDOWN first to make sure the NIC is in a safe state.

memory (unless we get an error while stopping the base code).  Leave UNDI
resident (though stopped) for .kpxe.

Still need to add code to record the device identification parameters
prior to stopping UNDI.

having to edit PXELOADER_KEEP_ALL as a config option.

Fix bug that caused over-allocation of .text16 and .data16 memory areas
by a factor of 16.

flow of control through this code.

We now always add PCI and PnP headers even for ISA ROMs; there's no harm
in doing so.

UNDI loader is still missing.

on the stack.

install() now calls relocate(), moves the protected-mode code to the new
location, and calls hide_etherboot().