Quattro Arcade

Smiley Test
All known NES games from Codemasters (Bee 52, Big Nose Freaks Out, Big Nose the Caveman, Dizzy The Adventurer, Fire Hawk, Linus Spacehead's Cosmic Crusade, Micro Machines, MiG 29: Soviet Fighter, Quattro Adventure, Quattro Sports, Stunt Kids, The Fantastic Adventures of Dizzy and Ultimate Stuntman) are based on the same stub library. As a result, all of these games, including game collection versions, include a "smiley test" of PRG ROM integrity and CHR RAM consistency.

To trigger the PRG test press and hold Up + Down + Left + Right + A + Select + Start then press Reset. To trigger the CHR test press and hold Up + Down + Left + Right + B + Select + Start and press Reset. If the PRG checksum matches with internal value or the CHR RAM chip has no bad cells, the program will display a green smiling pixel face, otherwise it will display a red crying pixel face.