INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - STOP PROFILING
AX = 4504h
Notes:  profiling is also turned off by the key combination
LeftShift + RightShift
for PROF.COM, this programs the CMOS clock by reading register 0Ch
and clearing bit 6 of register 0Bh.  It then masks IRQ8.
SeeAlso: AX=4505h,AX=4506h,AX=4507h

See also: 2F4503

2F4504 - Microsoft Profiler (PROF.COM/VPROD.386) - STOP PROFILING