[C/C++/ASM][DOS/Ring0] Узнать частоту процессора

unsigned long GetProcSpeed() { unsigned long Tacts; asm(" movb $0xFE,%al \n outb %al,$0x21 \n hlt \n rdtsc \n movl %eax,%esi \n hlt \n rdtsc \n sub %esi,%eax \n movb $0x0,%al \n out %al,$0x21"); asm("movl %%eax, %0\n" :"=a"(Tacts)); return Tacts*18; }

 

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