This was a great article and well worth the read, ports of unix to other platforms aren’t so common and in depth write ups are even more rare. It is a shame that the font on the page is so small (fixed by inspect element in firefox) and that the figures are not in line with the text.
I know that FreeBSD has been ported to two hardware architectures quite recently (riscv and aarch64), it would been nice if their authors could write up similar articles.
A friend through the local hackerspace always tells me his story about using 386BSD. He was mercilessly flamed by Bill Jolitz and driven away for 368BSD (and he didn’t want to waste his precious disk on a TCP/IP stack he wouldn’t use). Later he got an apology and explanation from Lynne.