The wiki has been upgraded to MediaWiki 1.43. The wiki's theme is still being adapted to work with the new version, and may appear broken for the time being. --RanAS
The Picture Processing Unit (PPU) is the SNES graphics chip. The SNES comes in 1chip and 2chip variations, which are terms Nintendo printed on the PCB for whether there is one PPU that draws everything (and combined with the 5A22), or two PPUs that divide up the work.
