QB-3 Schematics and Snapshots
QB-3 Trackball Interface (page 1); (page 2) [note: the trackball was added to later prototype versions and program code no longer exists]
QB-3 RAM Expansion (page 1); (page 2); (page 3); (page 4)
QB-3 Sound & Score schematics (page 1); (page 2); (page 3); (page 4)
QB-3 Cabinet Wiring (page 1); (page 2); (page 3)
Last modified: November 09, 2004