This is a cool project, but the author should note that they _are_ likely creating a derivative version of Civ1 here. It might look somewhat different, but that's clearly just 16-bit (?) intel opcodes in a slightly spicier form. It's very unlikely this sort of approach will end up with a copyright-free codebase, though it might be useful as a source for a cleanroom approach. The author shouldn't be discouraged -- lot…
If someone do in fact care, I'm sure someone else can organize an online donation for them tissues those who care can cry into.
Otherwise please accept that Civ I is effectively public domain.