@Override
	protected long getOffsetFromFlat(long flat, int segment) {
		return (flat & offsetMask);		// segment does not affect the offset
	}
Address Space for (intel) 16-bit protected mode programs. This space produces
SegmentedAddress objects whose underlying (flat) offset encodes both the
segment and the segment offset without losing information. There is no possibility
of alternate encodings for a single address as with real-mode.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/ProtectedAddressSpace.java