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→New ARM7 IO registers
! ADDRESS
! ADDRESS
! WIDTH
! WIDTH
! DESCRIPTION
|-
|-
| REG_IE2
| [[Interrupts|REG_IE]]
| 0x04000210
| 4
| Interrupt Enable Register (with new interrupt sources)
|-
| REG_IF
| 0x04000214
| 4
| Interrupt Flags Register (with new interrupt sources)
|-
| [[Interrupts|REG_IE2]]
| 0x04000218
| 0x04000218
| 4
| 4
| New Interrupt Enable Register (with more new interrupt sources)
|-
|-
| REG_IF2
| REG_IF2
| 0x0400021C
| 0x0400021C
| 4
| 4
| New Interrupt Flags Register (with more new interrupt sources)
|-
|-
| REG_AESCNT
| SCFG_?
| 0x04004000
| 1
| Unknown, used by BIOS
|-
| SCFG_?
| 0x04004001
| 1
| Unknown, used by BIOS
|-
| MBK_?
| 0x04004060
| 1
| Unknown, used by BIOS
|-
| MBK_?
| 0x04004061
| 1
| Unknown, used by BIOS
|-
| MBK_?
| 0x04004062
| 1
| Unknown, used by BIOS
|-
| [[NDMA|REG_NDMA_MASTER_CNT]]
| 0x04004100
| 4
| New DMA Control
|-
| [[NDMA]] channels registers
| 0x04004104
| 0x70
| New DMA Channels 0..3
|-
| [[AES_Engine|REG_AESCNT]]
| 0x04004400
| 0x04004400
| 4
| 4
| Encryption/Decryption Hardware...
|-
|-
| REG_AESBLKCNT
| REG_AESBLKCNT
| 48
| 48
|-
|-
| REG_I2CDATA
| [[I2C_Bus|REG_I2CDATA]]
| 0x04004500
| 0x04004500
| 1
| 1
| I2C Bus Data
|-
|-
| REG_I2CCNT
| REG_I2CCNT
| 0x04004501
| 0x04004501
| 1
| 1
| I2C Bus Control
|-
| [[SNDEX|REG_SNDEXCNT]]
| 0x04004700
| 2
| New Sound Control
|}
== New ARM9 IO registers ==
{| class="wikitable" border="1"
! NAME
! ADDRESS
! WIDTH
! DESCRIPTION
|-
| [[Interrupts|REG_IE]]
| 0x04000210
| 4
| Interrupt Enable Register (with new interrupt sources)
|-
| REG_IF
| 0x04000214
| 4
| Interrupt Flags Register (with new interrupt sources)
|-
| SCFG_A9ROM
| 0x04004000
| 2
| ROM Status (R)
|-
| SCFG_CLK
| 0x04004004
| 2
| New Block Clock Control (R/W)
|-
| SCFG_RST
| 0x04004006
| 2
| New Block Reset (R/W)
|-
| SCFG_EXT
| 0x04004008
| 4
| Extended Features (R/W)
|-
| SCFG_MC
| 0x04004010
| 2
| Memory Card Interface Status?
|-
| MBKx
| 0x04004040
| 0x24
| New Shared WRAM Control (New WRAM mappable to ARM7/ARM9/DSP)
|-
| [[NDMA|REG_NDMA_MASTER_CNT]]
| 0x04004100
| 4
| New DMA Control
|-
| [[NDMA]] channels registers
| 0x04004104
| 0x70
| New DMA Channels 0..3
|-
| [[Cameras#Camera_registers|REG_CAMRST]]
| 0x04004200
| 2
| Camera Reset
|-
| REG_CAMCNT
| 0x04004202
| 2
| Camera Control
|-
| REG_CAMDATA
| 0x04004204
| 4
| Camera Data
|-
| REG_CAM_?
| 0x04004210
| 4
| Camera ?
|-
| REG_CAM_?
| 0x04004214
| 4
| Camera ?
|-
| DSP_xxx
| 0x04004300
| 0x3X
| XpertTeak DSP coprocessor (CEVA Inc.)
|}
|}