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 (for use by Cafe OS apps) |
| 0x08000000 | 0x0811FFFF | 0x120000 | MEM0 | Ancast image |
| 0x1B900000 | 0x1B97FFFF | 0x80000 | MEM2 | Loader data area |
| 0x28000000 | 0x30000000 | 0x8000000 | MEM2 | UPID 5 |
| 0x30000000 | 0x32000000 | 0x2000000 | MEM2 | UPID 1 |
| 0x32000000 | 0x327FFFFF | 0x800000 | MEM2 | Cafe OS loader and libraries |
| 0x33000000 | 0x34000000 | 0x1000000 | MEM2 | UPID 6 |
| 0x34000000 | 0x50000000 | 0x1C000000 | MEM2 | several UPIDs |
| 0x4FFFFFFF | MEM2 | Background app memory | ||
| 0x50000000 | 0x8FFFFFFF | 0x40000000/0x80000000 | MEM2 | Foreground app memory |
| 0xFFE00000 | 0xFFF1FFFF | 0x120000 | MEM0 | Cafe OS kernel (mirror of ancast) |