Subj : Re: BC5.02 and the rdtsc instruction To : borland.public.cpp.borlandcpp From : "Ed Mulroy [TeamB]" Date : Wed Jul 02 2003 11:37 pm The instruction isn't supported as it's too new. What you can do is include DOS.H and use this __emit__(0x0F, 0x31); which stuffs the binary for RDTSC into the code. .. Ed > Kristo wrote in message > news:3f037583@newsgroups.borland.com... > > The compiler claims the rdtsc (read time stamp instruction) > is invalid. What should I do? .