INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - START PROFILING AX = 4503h Notes: Profiling is also turned on by the key combinations LeftShift + RightShift + Alt and LeftShift + RightShift + Ctrl for PROF.COM, this call programs the CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. clock by reading register 0Ch, and setting bit 6 of register 0Bh. It then makes sure that IRQ8 is unmasked SeeAlso: AX=4504h