; cpuid_pae.s - Use CPUID instruction to determine if x86 CPU has PAE.

[SECTION .text]
global _start

_start:
  xor eax,eax
  mov eax,1     ; 1=Get processor features
  cpuid

results:
  and edx,64    ; Mask the PAE bit.
  shr edx,6     ; Shift bit 6 into bit 0.

exit:
  mov eax,1
  xor ebx,ebx
  mov ebx,edx   ; Return value. 1=yes, 0=no.
  int 0x80      ; Exit syscall.