Memory Map

31   27    23   19    15   11    7    3  0
0000 0000  0000 0000  0000 0000  0000 0000
0xff ff ff ff

SDRAM, 2^12(ROW) X 2^8(COL) X 4(bank), Addr 23, [22, 21], 20    12 ... 1, 0
|-----------------------------------------------------------------------|
| 0x0c7f_ffff                          0[11]1                  XXX      |
|  ...                                                                  |
| 0x0c60_0000 (2M bytes, 4th bank)     0[11]0                  XXX      |
+-----------------------------------------------------------------------+
| 0x0c5f_ffff                          0[10]1                  XXX      |
|  ...                                                                  |
| 0x0c40_0000 (2M bytes, 3rd bank)     0[10]0                  XXX      |
+-----------------------------------------------------------------------+
| 0x0c3f_ffff                          0[01]1                  XXX      |
|  ...                                                                  |
| 0x0c20_0000 (2M bytes, 2nd bank)     0[01]0                  XXX      |
+-----------------------------------------------------------------------+
| 0x0c1f_ffff                          0[00]1                  XXX      |
|  ...                                                                  |
| 0x0c00_0000 (2M bytes, 1st bank)     0[00]0                  XXX      | base 0x0c00_0000, since cpu bank 6 of this SDRAM
|-----------------------------------------------------------------------|

... 

SPECIAL REGISTERS
|-----------------------------------------------------------------------|
| 0x01ff_ffff                                                           |
|  ...                                                                  |
| 0x01c0_0000 (4M bytes, but not cont.)                                 | base 0x01c0_0000, set by cpu arch
|-----------------------------------------------------------------------|

... 

flash ROM, Addr 20 ... 1, 0
|-----------------------------------------------------------------------|
| 0x001f_ffff                                                           |
|  ...                                                                  |
| 0x0000_0000 (2M bytes)                                                | base 0x0000_0000, since cpu bank 0 of this Boot ROM
|-----------------------------------------------------------------------|