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_writeto" - WRITE A DATAGRAM
	AH = 1Ch
	BX = network descriptor
	CX = number of bytes to transmit (0000h allowed)
	DX = send options (see #03464)
	DS:SI -> data to be written
	ES:DI -> "addr" structure (see #03462)
Return: CF clear if successful
	    AX = number of bytes actually written
	    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")
Note:	this function differs from AH=1Ah in that the address and socket
	  numbers can be overridden
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=1Ah,INT 61/AH=1Dh
SeeAlso: INT 63/AH=21h"BW-TCP"