Carl Williams writes, "Super Mario Bros is owned by Nintendo. We all know that. The game is iconic as well. That is probably why it is the focus of fan ports. That is exactly what is going on here. The fan port to the Texas Instruments 99/4A is now at preview number 4. Please note, this is not a stock Texas Instruments computer, there is an add-on board – F18A – installed. Does not make it any less impressive."