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1,152 bytes removed ,  21:34, 22 January 2021
Line 429: Line 429:  
   0=CTR+256MHz
 
   0=CTR+256MHz
 
   1=LGR2+256MHz, 5=LGR2+804MHz
 
   1=LGR2+256MHz, 5=LGR2+804MHz
   2=LGR+256MHz, 3=LGR+536MHz
+
   2=LGR1+256MHz, 3=LGR1+536MHz
    
N3DS modes (LGR1/LGR2) enable the New 3DS FCRAM extension and are needed to access N3DS-only devices.
 
N3DS modes (LGR1/LGR2) enable the New 3DS FCRAM extension and are needed to access N3DS-only devices.
Line 443: Line 443:  
On firmlaunch, the kernel sets the mode to O3DS.
 
On firmlaunch, the kernel sets the mode to O3DS.
   −
[[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 [[CONFIG11 Registers#CFG11_SOCINFO|CFG11_SOCINFO]]:
+
[[SVC#KernelSetState|svcKernelSetState]] type10, only implemented on New3DS, uses this register. This piece of code choses the mode matching the input Param0 bit0 state (1 for higher clock), using the state of [[CONFIG11 Registers#CFG11_SOCINFO|CFG11_SOCINFO]] to determine which mode is the best (which is always LGR2 on all released New 3DS units).
{| class="wikitable" border="1"
  −
!  Register value
  −
!  Higher-clockrate bit set in svcKernelSetState Param0
  −
!  CFG11_SOCINFO bit2 set
  −
!  MPCore timer/watchdog prescaler value, prior to subtracting it by 0x1 when writing it into hw/state
  −
!  Clock-rate multiplier
  −
!  Description
  −
|-
  −
| 0x01
  −
| No
  −
| Yes
  −
| 0x01
  −
| 1x
  −
| 268MHz
  −
|-
  −
| 0x02
  −
| No
  −
| No
  −
| 0x01
  −
| 1x
  −
| 268MHz
  −
|-
  −
| 0x05
  −
| Yes
  −
| Yes
  −
| 0x03
  −
| 3x
  −
| 804MHz
  −
|-
  −
| 0x03
  −
| Yes
  −
| No
  −
| 0x02
  −
| 2x
  −
| 536MHz (tested on New3DS)
  −
|}
  −
 
  −
Note that the above CFG11_SOCINFO 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).
  −
 
  −
The following register value(s) were tested on New3DS by patching the kernel:
  −
* 0x00: Entire system hangs.
  −
* 0x02: Entire system hangs.
  −
* 0x03: ARM11 runs at 536MHz.
  −
* 0x04: Entire system hangs.
  −
* 0x06: Entire system hangs.
  −
* 0x07: Same result as 0x05.
  −
* 0x08: Entire system hangs.
  −
* 0x09: Entire system hangs.
  −
* 0x0A: Entire system hangs.
  −
* 0x0B: Same result as 0x03.
  −
* 0x0C: Entire system hangs.
  −
* 0x0D: Same result as 0x05.
  −
* 0x0E: Entire system hangs.
  −
* 0x0F: Same result as 0x05.
  −
* 0x1F, 0x2F, 0x4F, 0x8F, 0xFF: Same result as 0x05.
      
== PDN_LGR_CNT ==
 
== PDN_LGR_CNT ==

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