Int 62 Fn 0B - Cswitch - Send Message [T] AH = 0Bh CX = number of bytes to write DS:SI -> buffer DX = queue number (0-63) Return: AX = FFFEh triggered by something arriving, redo the call = FFFFh bad queue number = 0000h no message was on queue else number of bytes in message See Also: AH=0Ah,AH=0Ch