lockout chip as needed. PAL consoles face another incompatibility when playing out-of-region cartridges: the NTSC video standard specifies video at 60 Hz but PAL operates at 50 Hz, resulting in an approximately 16.7% slower framerate. PAL's higher resolution results in letterboxing of the output image. Some commercial PAL region releases exhibit this same problem and, therefore, can be played in NTSC systems without issue, but other games will face a 20% speedup if played in an NTSC console. To mostly correct this issue, a switch can be added to place the Super NES PPU into a 60 Hz mode supported by most newer PAL televisions. Later games will detect this setting and refuse to run, requiring the switch to be thrown only after the check completes. Casing All models of the Super NES control deck are predominantly gray, of slightly different shades. The original North American version, designed by Nintendo of America industrial designer Lance Barr (who previously redesigned the Famicom to become the NES), has a boxy design with purple sliding switches and a dark gray eject lever. The loading bay surface is curved, both to invite interaction and to prevent food or drinks from being placed on the console and spilling as with the flat-surfaced NES. The Japanese and European versions are more rounded, with darker gray accents and buttons. The North American New-Style Super NES (model SNS-101) and the Japanese Super Famicom Jr. (model SHVC-101), all designed by Barr, are both smaller with a rounded contour. The SNS-101 buttons are purple where the Super Famicom Jr. buttons are gray. The European and American versions of the Super NES controllers have much longer cables compared to the Japanese Super Famicom controllers. All versions incorporate a top-loading slot for game cartridges, although the shape of the slot differs between regions to match the different shapes of the cartridges. The MULTI OUT connector (later used on the Nintendo 64 and GameCube) can output composite video, S-Video and RGB signals, as well as RF with an external RF modulator. Original versions additionally include a 28-pin expansion port under a small cover on the bottom of the unit and a standard RF output with channel selection switch on the back; the redesigned models output composite video only, requiring an external modulator for RF. The Nintendo Super System (NSS) is an arcade system for retail preview of 11 particular Super NES games in