INT 13 - PU_1700.COM - INSTALLATION CHECK

	AH = 18h
	CX = 5055h ('PU')
	DL = 00h
Return: AX = 7570h ('up') if PU_1700 is installed
Program: PU_1700 is a BIOS enhancer from PU Service Systems which permits
	  formatting diskettes at higher capacity (1.78M instead of 1.44M)
SeeAlso: AX=057Fh/SI=324Dh"2M"