.586
.model flat, stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.data
mbTitle     DB "ASM",0
mbText1		DB "GOOD",0

.code
start:
RDTSC
XOR ECX,ECX
mov ECX,EAX
RDTSC
SUB eax,ecx
CMP EAX,0FFFh
JA @F
INVOKE MessageBox,0,ADDR mbText1,ADDR mbTitle,0
@@:INVOKE ExitProcess,0 
end start