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→ARM9 MPU Regions
| RO
| RO
|}
|}
===[[Bootloader|Boot9]]===
{| class="wikitable" border="1"
|-
! Region
! Address
! Size
! Privileged-mode data permissions
! User-mode data permissions
! Privileged-mode instruction permissions
! User-mode instruction permissions
|-
| 0
| 0x20000000
| 0x08000000
| None
| None
| None
| None
|-
| 1
| 0x10000000
| 0x10000000
| RW
| RW
| None
| None
|-
| 2
| 0x08000000
| 0x00100000
| RW
| RW
| None
| None
|-
| 3
| 0x08000000
| 0x00000400
| RW
| RW
| RO
| RO
|-
| 4
| 0xFFF00000
| 0x00004000
| RW
| RW
| None
| None
|-
| 5
| 0x07FF8000
| 0x00008000
| RW
| RW
| RO
| RO
|-
| 6
| 0xFFFF0000
| 0x00010000
| RO
| RO
| RO
| RO
|-
| 7
| 0x1FFFE000
| 0x00000800
| RW
| RW
| None
| None
|}
* Instruction cachable bits = 0x40(only enabled for region6).
* Data cachable bits = 0x44(only enabled for region2 and region6).
* Data bufferable bits = 0x44(only enabled for region2 and region6).
These are the same for both Old3DS/New3DS.
==ARM9 ITCM==
==ARM9 ITCM==