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Work RAM

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WRAM (Work RAM) serves as the SNES' main memory. It has part number 21326. [3]

Even though WRAM has both Address Bus A and Address Bus B connected to it, the chip can only pay attention to one at a time, so WRAM-to-WRAM DMA isn't possible.

WRAM is left intact by the Reset_Button. [2]

The WRAM chip is straddling regions C1 and D1 in the jwdonal schematic

References