I HAVE STOPPED WORKING ON THIS. SEE https://github.com/Kazthwak/jethros2 This is a garbage OS made by me. I have interrupt (singular) working. YAAAAAAAAAAW :-). I cannot explain my joy with words. The os-image is a binary file that if written to the start of a disk, should work properly. The makefile generates an os-image and then runs it using qemu. I fixed the makefile. It is mostly normal now.