Thank you! The first one says it has been tested with “Case Institute SuperSoap” (which was the compiler/assembler that Knuth and his college friends worked on)

Thank you! The first one says it has been tested with “Case Institute SuperSoap” (which was the compiler/assembler that Knuth and his college friends worked on), so there's hope! I can't figure out how to use it though :-) If anyone succeeds in running the (very short) “number perverter” program, and turning “0123456789” into “9876543210” I'd love to know. (The last two I'm not sure how far along they are.)