Here is "The Spider" for the NEC PC-6001mkII. It supports machine language and was made by Hudson. The box is included, but the instruction manual is not (I'm not sure if it originally came with one). It was found during a cleanup at my parents' house. I haven't tested it recently, but I was told it worked fine previously. There's no mold or damage to the tape, so I think it's okay, but considering its age, I'm selling it as-is, as junk. I don't know much about it, so I may not be able to answer your questions. Please judge from the photos. I'm also listing other software, so please take a look.