The 6809 also saw some use in various videogame systems. Notable among these, in its 68A09 incarnation, in the unique vector graphics based Vectrex home videogame machine. It was also used in the Milton Bradley Expansion (MBX) system (an arcade console for use with the Texas Instruments TI-99/4A home computer, and a series of arcade games, released during the early to mid-1980s. Williams Electronics was a prolific user of the processor, which was deployed in "Defender", "Stargate", "Joust", "", "Sinistar", and other games. The 6809 CPU forms the core of the successful Williams Pinball Controller. The KONAMI-1 is a modified 6809 used by Konami in "Roc'n Rope", "Gyruss", and "The Simpsons".