BIOS / Int / Int 6F / 0A

                            INT 6F - 10-NET - CHAT

Input		Output
AX	0Ah		AX
			BX
CX			CX
DS:DX	Chat Message		DX
DS:BX	Control Parameters		CF

Control Parameters:

                 8 BYTEs sender ID, if nulls defaults to node's userID
                 8  BYTEs destination user ID, 'EVERYONE' may be used
                12 BYTEs destination node ID

Chat Message:

                  WORD  length+2 of following text
                N BYTEs text, max 101 bytes