The dump script was limited to the memory space below 0xa0000 because
the memory-mapped area of the framebuffer started above there, making
the GNU Debugger refuse to dump that memory. Now, the script has got a
workaround for that.
The memory which is given to the emulated system is also reduced to 64
megabytes with this commit as to not use half a gigabyte of disk space
per memory dump.
As legacy BIOS isn't as straightforward to develop using a modern
system, modern emulators/VMs and virtual machine firmware, it was
decided to start work on an UEFI version of the Nightloader.
This commit leaves the not-yet boot-capable, but as far as it's
there already assembling and working legacy BIOS code behind for
later work on this edition.