Although early games like Super Mario Bros., Castlevania, and The Legend of Zelda managed to produce effective split-screen scrolling with this method, it is quite CPU-intensive, and some later cartridges incorporated MMC circuitry (most prominently Nintendo's MMC3 chip) that kept track of the PPU's address and data lines and generated raster interrupts.
Raster graphics | raster graphics | Walther Berthold Raster | Raster image processor | raster image processor | horizontal blank interrupt | Comparison of raster graphics editors | Christian Raster |