Darc Requiem said:
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The Wii had an ARM9 CPU (which handled I/O, security systems and low level firmware) and a DSP intergrated into the GPU package. the ARM CPU was embedded in the GPU and the DSP was embedded into the 1T-SRAM that they used for VRAM.
I would say it's likely that they did the same with the Wii U so that GPU package likely not only includes the GPU and a large chunck of eDRAM, but also an ARM bassed I/O controler and a DSP.
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