@Override
	public MemoryPage getPage(long addr) {
		MemoryPage page = new MemoryPage(getPageSize());
		// Assume that -addr- is page aligned
		AddressSpace spc = getSpace();
		byte[] maskUpdate =
			loader.loadFill(page.data, getPageSize(), spc.getAddress(addr), 0, true);
		page.setInitialized(0, getPageSize(), maskUpdate);
		return page;
	}
Retrieve an aligned page from the bank.  First an attempt is made to retrieve the
page from the LoadImage, which may do its own zero filling.  If the attempt fails, the
page is entirely filled in with zeros.
Ghidra/Framework/Emulation/src/main/java/ghidra/app/emulator/memory/MemoryImage.java