INT 2F U - INTCFG v2.1 - INSTALLATION CHECK                                     
	AX = 9F00h
Return: AX = FFFFh if installed
Program: INTCFG is an optionally-resident control program for INTMON by Celso
	  Minnitti, JrIBM PCjr.
SeeAlso: AX=9E00h,AX=9F01h,AX=9F30h,AX=9F49h