There must be hundreds of examples of prior art. I wrote a split screen sprite editor for dos about 20 years ago. I bet it's still on a 720 floppy some place i

There must be hundreds of examples of prior art. I wrote a split screen sprite editor for dos about 20 years ago. I bet it's still on a 720 floppy some place in my basement. In fact, I think I have a source printout filed away too..