use32
format ELF executable 3
entry start
segment readable executable
start:
        call mmxtest
mmxtest:
        push ebx
        push ecx
        push edx
        mov eax,1
        cpuid
        mov eax,edx
        shr eax,23
        and eax,1
        pop edx
        pop ecx
        pop ebx
        ret
segment readable writeable
align 4    

use32
format ELF executable 3
entry start
segment readable executable

start: 
        ; program entry point. OK!
        call mmxtest
        ; after calling "mmxtest" it will return here, so put an end here
        ; param1 in ebx (0)
        xor ebx,ebx
        ; syscall number in eax (1 = sys_exit)
        mov eax,$00000001
        ; int $80, call kernel function (it won't return, program terminates)
        int $80
        ; no more execution after this
mmxtest:
        push ebx 
        push ecx 
        push edx 
        mov eax,1 
        cpuid 
        mov eax,edx 
        shr eax,23 
        and eax,1 
        pop edx 
        pop ecx 
        pop ebx 
        ret