INT 2F - PMEASURE.EXE - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if multiplex number in use
            ES:DI -> ASCIZ signature "PMEASURE.EXE" if PMEASURE.EXE installed
Program: PMEASURE.EXE is a TSR for monitoring system hardware activity which
          is part of the Personal Measure system activity monitor from Spirit
          of Performance, Inc.
Notes:  AH=C0h is the default; PMEASURE.EXE searches for a free multiplex
          number between C0h and FFh on which to install itself. If
          ASPIHOOK.SYS is already installed, PMEASURE.EXE uses the next higher
          free multiplex number.
SeeAlso: AX=C000h"ASPIHOOK"

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