In memory of Ben “bushing” Byer, who passed away on Monday, February 8th, 2016.

Memory map

From WiiUBrew
Revision as of 00:07, 12 September 2015 by Hykem (talk | contribs) (Updated physical memory table)
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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
0x04000000 0x0402FFFF 0x30000 MEM0 IOSU CRYPTO process
0x05000000 0x050BFFFF 0xC0000 MEM0 IOSU MCP process
0x05100000 0x0511FFFF 0x20000 MEM0 Unknown (IOSU)
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
0x10000000 0x100FFFFF 0x100000 MEM0 Unknown (IOSU)
0x10100000 0x104CFFFF 0x3D0000 MEM0 IOSU USB process
0x10800000 0x11EDFFFF 0x16E0000 MEM0 IOSU FS process
0x11F00000 0x1215FFFF 0x260000 MEM0 IOSU PAD process
0x12300000 0x1288FFFF 0x590000 MEM0 IOSU NET process
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 MEM0 Unknown (IOSU)
0x1FE40000 0x1FFFFFFF 0x1C0000 MEM0 Unknown (IOSU)
0x20000000 0x27FFFFFF 0x8000000 MEM0 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
0xE0000000 0xE026FFFF 0x270000 MEM0 IOSU ACP process
0xE1000000 0xE12EFFFF 0x2F0000 MEM0 IOSU NSEC process
0xE2000000 0xE26CFFFF 0x6D0000 MEM0 IOSU NIM-BOSS process
0xE3000000 0xE32FFFFF 0x300000 MEM0 IOSU FPD process
0xE4000000 0xE415FFFF 0x160000 MEM0 IOSU TEST process
0xE5000000 0xE506FFFF 0x70000 MEM0 IOSU AUXIL process
0xE6000000 0xE604FFFF 0x50000 MEM0 IOSU BSP process
0xE7000000 0xE7000FFF 0x1000 MEM0 Unknown (IOSU)
0xEFF00000 0xEFF07FFF 0x8000 MEM0 Unknown (IOSU)
0xFFE00000 0xFFF1FFFF 0x120000 MEM0 PPC Cafe OS kernel (mirror of ancast)
0xFFFF0000 0xFFFFFFFF 0x10000 MEM0 IOSU kernel SRAM
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