asm {
  USE64
  BTS   U32 [SYS_RUN_LEVEL],RLf_64BIT

  //Set required bits for SSE instruction execution

  MOV_RAX_CR4
  BTS     RAX, CR4f_OSFXSR
  MOV_CR4_RAX

  MOV_EAX_CR0
  BTR     RAX, CR0f_EM
  BTR     RAX, CR0f_MP
  BTS     RAX, CR0f_NE
  MOV_CR0_EAX

  FNINIT
  MOV   RAX,SYS_FIXED_AREA+CSysFixedArea.init_fpu_mmx
  FXSAVE        U64 [RAX]

//Init CPU0 Struct
  PUSH  SYS_FIXED_AREA+CSysFixedArea.adam
  PUSH  SYS_FIXED_AREA+CSysFixedArea.boot_cpu
  PUSH  0
  CALL  &CPUStructInit
  CALL  SET_GS_BASE

//Init Adam HeapCtrl
  MOV   EDI,U32 SYS_FIXED_AREA+CSysFixedArea.adam_hc
  MOV   EAX,U32 SYS_FIXED_AREA+CSysFixedArea.sys_code_bp
  MOV   U64 CHeapCtrl.bp[RDI],RAX
  MOV   U32 CHeapCtrl.hc_signature[RDI],HEAP_CTRL_SIGNATURE_VAL

  LEA   RAX,U64 CHeapCtrl.next_um-CMemUsed.next[RDI]
  MOV   U64 CHeapCtrl.next_um[RDI],RAX
  MOV   U64 CHeapCtrl.last_um[RDI],RAX

  MOV   EAX,U32 SYS_FIXED_AREA+CSysFixedArea.adam
  MOV   U64 CHeapCtrl.mem_task[RDI],RAX
  MOV   U64 CTask.code_heap[RAX],RDI
  MOV   U64 CTask.data_heap[RAX],RDI
  MOV   U32 CTask.task_signature[RAX],TASK_SIGNATURE_VAL

  BTS   U32 [SYS_RUN_LEVEL],RLf_16MEG_ADAM_HEAP_CTRL

  PUSH  MEM_ADAM_STK
  PUSH  U32 SYS_FIXED_AREA+CSysFixedArea.adam
  CALL  &TaskInit
  CALL  SET_FS_BASE
  MOV   RSP,U64 CTask.rsp[RAX]

  JMP   I32 &KMain

//************************************
  USE32
  SYS_ENTER_LONG_MODE:: //Switch to long 64-bit mode

  MOV_EAX_CR4
  OR      EAX, CR4F_PAE | CR4F_PGE
  MOV_CR4_EAX

  MOV   EAX,[MEM_PML4]
  MOV_CR3_EAX

  MOV   ECX,IA32_EFER
  XOR   EDX,EDX
  MOV   EAX,IA32F_LME
  WRMSR

  MOV_EAX_CR0
  BTS   EAX,31  //Enable paging (required for 64-bit mode)
  MOV_CR0_EAX

  DU8   0xEA;      //JMP CGDT.cs64:@@05
  DU32  @@05;
  DU16  CGDT.cs64;
  USE64
@@05:   MOV     AX,CGDT.ds
  MOV   DS,AX
  MOV   ES,AX
  MOV   SS,AX
  MOV   FS,AX
  MOV   GS,AX
  RET

//************************************
  SYS_RAM_REBOOT:: //This gets copied high.  SYS_RAM_REBOOT
  PUSH  U32 CGDT.ds             //stk seg
  PUSH  U32 BOOT_RAM_LIMIT      //stk
  PUSH  U32 0                   //flags
  PUSH  U32 CGDT.cs32
  LEA   RAX,[@@10]
  PUSH  RAX
  IRET
  USE32
@@10:   WBINVD

//Disable paging
  MOV_EAX_CR0
  BTR   EAX,31
  MOV_CR0_EAX

  MOV   ECX,IA32_EFER
  XOR   EDX,EDX
  XOR   EAX,EAX
  WRMSR

  MOV   EBX,BOOT_SRC_RAM
  MOV   EAX,I32 CORE0_32BIT_INIT
  JMP   EAX
  SYS_RAM_REBOOT_END::
  USE64
}