INT 14 - Connection Manager - RECEIVE CHARACTER BLOCK                           
	AH = 07h
	DX = FFFFh
	AL = connection ID
	BL = flag
	    00h wait for data
	    nonzero do not wait if no data avaiable
	CX = size of receive buffer
	ES:DI -> buffer for received characters
Return: AH = return code (00h-02h,04h,FFh) (see #00303)
	BH = line status (see #00306)
	CX = number of characters received
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
	  serial ports over an IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. or NetBIOS-based network
SeeAlso: AH=01h/DX=FFFFh,AH=04h/DX=FFFFh,AH=06h/DX=FFFFh