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→CreateThread
The processorid parameter specifies which processor the thread can run on. Non-negative values correspond to a specific CPU. (e.g. 0 for the Appcore and 1 for the Syscore on Old3DS) Special value -1 means all CPUs, and -2 means the default CPU for the process (Read from the [[NCCH/Extended Header|Exheader]], usually 0 for applications, 1 for system services). Games usually create threads using -2.
The processorid parameter specifies which processor the thread can run on. Non-negative values correspond to a specific CPU. (e.g. 0 for the Appcore and 1 for the Syscore on Old3DS) Special value -1 means all CPUs, and -2 means the default CPU for the process (Read from the [[NCCH/Extended Header|Exheader]], usually 0 for applications, 1 for system services). Games usually create threads using -2.
With the Old3DS kernel, the s32 processorid must be <2.
With the Old3DS kernel, the s32 processorid must be <=2(for the processorid validation check in the kernel).
With the New3DS kernel: processorid must be less than or equal to <total cores(MPCore "SCU Configuration Register" CPU number value + 1)>. When processorid==0x2 and the process is not an APPLICATION mem-region process, exheader kernel-flags bitmask 0x2000 must be set otherwise error 0xD9001BEA is returned. When processorid==0x3 and the process is not an APPLICATION mem-region process, error 0xD9001BEA is returned. These are the only restriction checks done by the kernel for processorid.
With the New3DS kernel: processorid must be less than or equal to <total cores(MPCore "SCU Configuration Register" CPU number value + 1)>(for the processorid validation check in the kernel). When processorid==0x2 and the process is not an APPLICATION mem-region process, exheader kernel-flags bitmask 0x2000 must be set otherwise error 0xD9001BEA is returned. When processorid==0x3 and the process is not an APPLICATION mem-region process, error 0xD9001BEA is returned. These are the only restriction checks done by the kernel for processorid.
The thread priority value must be in the following range, otherwise error 0xE0E01BFD is returned: 0x0..0x3F.
The thread priority value must be in the following range, otherwise error 0xE0E01BFD is returned: 0x0..0x3F.