I noticed that the assembly source file for blackjack is missing from the source tree so I tried to recreate it, so far unsuccessfully. My first idea was to grab bj.s from 2.11BSD and assemble it the Unix v5 as command. That seems to generate a bunch of errors. Also other assembly source files don't seem to have .even in them. Another idea would be generate the source code from the executable itself, but there doesn't seem to be a disassembler for early Unix. It's possible that v5 bj.s was printed out somewhere but so far no luck finding it. Mark