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→PDN_MPCORE_STATUS
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== PDN_MPCORE_STATUS ==
== PDN_MPCORE_CLKCNT ==
This is used for configuring the New3DS ARM11 CPU clock-rate(unknown if writing here does anything on Old3DS).
This is used for configuring the New3DS ARM11 CPU, for the clockrate and "EnableL2Cache".
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
| 0
| 0
| Always set to 1 on both Old3DS and New3DS.
| Always(?) set to 1 on both Old3DS and New3DS.
|}
[[SVC#KernelSetState|svcKernelSetState]] type10, only implemented on New3DS, uses this register. That code writes the following values to this register, depending on the input Param0 bit0 state, and the state of PDN_MPCORE_CFG:
{| class="wikitable" border="1"
! Register value
! Higher-clockrate bit set in svcKernelSetState Param0
! PDN_MPCORE_CFG bit2 set
! MPCore timer/watchdog prescaler value, prior to subtracting it by 0x1 when writing it into hw/state
! Clock-rate multiplier
! Description
|-
|-
| 1
| 0x1
| 3rd ARM11 MPCore powered on maybe?
| No
| Yes
| 0x1
| 1x
| 268MHz
|-
| 0x2
| No
| No
| 0x1
| 1x
| 268MHz
|-
| 0x5
| Yes
| Yes
| 0x3
| 3x
| 804MHz
|-
| 0x3
| Yes
| No
| 0x2
| 2x
| 536MHz (tested on New3DS)
|}
|}
Note that the above PDN_MPCORE_CFG bit is 1 on New3DS, and 0 on Old3DS. Since this SVC is only available with the New3DS ARM11-kernel, the only additional available clock-rate is 804MHz when running on New3DS(with official kernel code).
== PDN_MPCORE_CNT ==
== PDN_MPCORE_CNT ==