Interesting. Word seems to use ASCII CR as paragraph break, so does it use ASCII LF or ASCII FF as page break? (There is also a forced end-of-line produced by Shift-Enter that does not start a new paragraph. Simply pressing Enter actually starts a new paragraph, which starts a new line as a side-effect.)
If we want to consider producing DOCX, it would be fairly easy to input AAA [Control-Enter to insert a page break] BBB and see what turns up in document.xml. Word DOC format uses Microsoft's "OLE Container" format, which turns out to be a miniature FAT filesystem, complete with its own allocation tables, and (if I remember correctly) a second FAT filesystem with smaller blocks stored inside a "file" in the outer container file. At least they only did that to one level of recursion, instead of producing a "filesystems all the way down" crawling horror.