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
VRAM Bus Control, so-called in Figure 2-22-1 "Super NES Functional Block Diagram" of the official Super Nintendo development manual[1], is the VRAM address bus. It connects S-PPU1 to VRAM. It is not connected to anything else.