Simple alternative to GetTickCount()

MAKE BY DAVIDE CHIAPPETTA

I made this note on the notes of "With A Little Help From My Friends"  of Joe Cooker (Woodstock)
(disassembling GetTickCount with ollydbg)
kernel32.GetTickCount:
7C80932E                  MOV EDX,7FFE0000
7C809333                                        MOV EAX,[EDX]
7C809335                                        MUL DWORD PTR [EDX+4]
7C809338                                        SHRD EAX,EDX,18
7C80933C                                        RETN
************************************************************
** memory: address 7FFE0000 (alias struct for C/C++ SYSTEMTIME)
** values change every microsecond of the time, try to see with any debugger
(address)                 (value hex)
7FFE0000                 00224D66          seconds
7FFE0004                 0FA00000        
7FFE0008                 C87E31C6          milliseconds,seconds,minute
7FFE000C                 00000051        
7FFE0010                 00000051        
7FFE0014                 29DE5648          milliseconds,seconds,minute
7FFE0018                 01CC6F3A         days, months and years
7FFE001C                 01CC6F3A         days, months and years

code C (+ inline assembly) alternative simple a GetTickCount()
#include <stdio.h></stdio.h>
int main ()  {
int n=0;
long timer1,timer2;

_asm
{
 mov eax, 0x7FFE0008 //We need only milliseconds.
 push [eax]
 pop timer1
}
for (n=0;n
{
}
_asm{
 mov eax, 0x7FFE0008  //We need only milliseconds.
 push [eax]
 pop timer2
}
printf("%d",timer2-timer1); //idem GetTickCount() - oldTimer
return 0;
}

By Davide Chiappetta