Super Nintendo Entertainment System
Technical specifications
Early revisions of the 5A22 used in SHVC boards are prone to spontaneous failure; this can produce a variety of symptoms including graphics glitches during Mode 7 operation, a black screen on power-on, or inability to read the controllers properly. The first revision 5A22 also had a fatal bug in the DMA controller that could cause games to crash when running; this was corrected in subsequent revisions.
Super Nintendo Entertainment System-22