VRAM

There are two VRAM chips on the SNES motheboard, both connected to S-PPU1.

One chip holds the low bytes of the 16-bit words, the other chip holds the high bytes.

The two chips can be referred to as "A" and "B", after the lines of the VRAM Data Bus VDA0~7 and VDB0~7.

VRAM chip B in region B2 of the jwdonal schematic (directly above chip A)