INT 61 - PCIBM PC/TCP(Transmission Control Protocol) A higher level (session layer) of the TCP/IP protocol suite.  See also IP, TCP/IP. kernel v2.05+ - "net_readfrom" - READ A DATAGRAM
	AH = 1Dh
	BX = network descriptor
	CX = maximum number of bytes to read
	DX = receive options (see #03464)
	DS:SI -> buffer for received data
	ES:DI -> 9-byte buffer containing "addr" structure (see #03462)
Return: CF clear if successful
	    AX = number of bytes read
	    DX = ???
	CF set on error
	    AX = error code (see #03319 at INT 61"FTP(File Transfer Protocol)  The standard protocol for copying files from one machine to another on a TCP/IP (Internet) network.  Also the program of the same name with which a user may transfer files. Software")
Notes:	this function can read from any host or a designated host depending
	  on settings in the "addr" structure
	only for use with datagram or Raw descriptors
SeeAlso: INT 61"FTP(File Transfer Protocol)  The standard protocol for copying files from one machine to another on a TCP/IP (Internet) network.  Also the program of the same name with which a user may transfer files. Software",INT 61/AH=00h"PCIBM PC/TCP(Transmission Control Protocol) A higher level (session layer) of the TCP/IP protocol suite.  See also IP, TCP/IP.",INT 61/AH=1Bh,INT 61/AH=1Ch