Memory map

The Wii U has a variety of physical memory sources. There is the 2 GiB of DDR3 split into 4 chips (MEM2), 32 MiB of fast 1T SRAM (MEM1), and the old GX framebuffer (MEM0).

Start Address	End Address	Size	Chip	Description
0x00000000	0x01FFFFFF	0x2000000	MEM1	MEM1-A: 0x00000000 to 0x00000FFF (0x1000) MEM1-B: 0x00001000 to 0x01FFFFFF (0x1FFF000) MEM1 foreground: 0x00000000 to 0x01FFFFFF (0x2000000) Used by Cafe OS apps
0x08000000	0x0811FFFF	0x120000	MEM0	MEM0-A: 0x08000000 to 0x080FFFFF (0x100000) MEM0-B: 0x08100000 to 0x0811FFFF (0x20000) MEM0 foreground: 0x080C0000 to 0x0811FFFF (0x60000) PPC kernel ancast image
0x08120000	0x081BFFFF	0xA0000	MEM0	IOSU kernel
0x081C0000	0x0827FFFF	0xC0000	MEM0	IOSU MCP process
0x08280000	0x082AFFFF	0x30000	MEM0	IOSU CRYPTO process
0x082C0000	0x082C0FFF	0x1000	MEM0	Unknown (IOSU)
0x10000000	0x100FFFFF	0x100000	MEM2	Unknown (IOSU)
0x10100000	0x104CFFFF	0x3D0000	MEM2	IOSU USB process
0x10800000	0x11EDFFFF	0x16E0000	MEM2	IOSU FS process
0x11F00000	0x1215FFFF	0x260000	MEM2	IOSU PAD process
0x12300000	0x1288FFFF	0x590000	MEM2	IOSU NET process
0x12900000	0x12B6FFFF	0x270000	MEM2	IOSU ACP process
0x12BC0000	0x12EAFFFF	0x2F0000	MEM2	IOSU NSEC process
0x12EC0000	0x1358FFFF	0x6D0000	MEM2	IOSU NIM-BOSS process
0x13640000	0x1393FFFF	0x300000	MEM2	IOSU FPD process
0x13A40000	0x13B9FFFF	0x160000	MEM2	IOSU TEST process
0x13C00000	0x13C70000	0x70000	MEM2	IOSU AUXIL process
0x13CC0000	0x13D0FFFF	0x50000	MEM2	IOSU BSP process
0x13D80000	0x13DA0000	0x20000	MEM2	Unknown (IOSU)
0x14000000	0x1CFFFFFF	0x9000000	MEM2	MEM2-A: 0x14000000 to 0x1CFFFFFF (0x9000000) - Loader data: 0x1B900000 to 0x1B97FFFF (0x80000) PPC region The loader's data is allocated here
0x1D000000	0x1FAFFFFF	0x2B00000	MEM2	IOSU global heap
0x1FB00000	0x1FDFFFFF	0x300000	MEM2	IOSU global IOB (input/output block)
0x1FE00000	0x1FE1FFFF	0x20000	MEM2	Unknown (IOSU)
0x1FE40000	0x1FFFFFFF	0x1C0000	MEM2	Unknown (IOSU)
0x20000000	0x27FFFFFF	0x8000000	MEM2	Unknown (IOSU)
0x28000000	0xCFFFFFFF	0xA8000000	MEM2	MEM2-B: 0x28000000 to 0xCFFFFFFF (0xA8000000) - Home Menu (RAMPID 5): 0x28000000 to 0x2FFFFFFF (0x8000000) - root.rpx (RAMPID 1): 0x30000000 to 0x31FFFFFF (0x2000000) - Cafe OS loader and libraries: 0x32000000 to 0x327FFFFF (0x800000) - Error display (RAMPID 6): 0x33000000 to 0x33FFFFFF (0x1000000) - Background app memory (RAMPID 4): 0x34000000 to 0x4FFFFFFF (0x1C000000) - Foreground app memory (RAMPID 7): 0x50000000 to 0x8FFFFFFF (0x40000000) - Extra app memory for devkits: 0x90000000 to 0xCFFFFFFF (0x40000000) PPC region Cafe OS loader, libraries and apps
0xFFE00000	0xFFF1FFFF	0x120000	MEM0	PPC Cafe OS kernel (mirror of ancast)
0xFFF00000	0xFFF07FFF	0x8000	SRAM?	Unknown (IOSU seems to see this area, but with no relation to PPC)
0xFFFF0000	0xFFFFFFFF	0x10000	SRAM	IOSU kernel SRAM