According to this article, most of the code was written in FORTRAN (which is, yeah, pretty old, but is still in widespread use -- you can definitely still hire

According to this article, most of the code was written in FORTRAN (which is, yeah, pretty old, but is still in widespread use -- you can definitely still hire FORTRAN programmers). https://www.wired.com/2013/09/vintage-voyager-probes/ https://www.wired.com/2013/09/vintage-voyager-probes/ Now, the compiler back end for the CPU may not exist any more, but I wouldn't think that would be all that hard to reproduce.