Int 2F Fn 4501 U - Microsoft Profiler (prof.com/vprod.386) - Setup Profi [G] AX = 4501h BX = CSIPS buffer size in KB (first parameter for ProfSetup) CX = output limit in KB (second parameter for ProfSetup) Note: this call is not supported by PROF.COM See Also: AX=4502h,AX=4503h