The ATARI 1027 Printer is a letter quality impact printer that averages 10 characters per second. It is a hard copy output peripheral intended for use under the control of the atari 400, 800, 600XL, or 1200XL computer. It connects directly to the SIO peripheral port of the computer (no interface is required). The printer mechanism is a type wheel assembly. All firmware is resident in the printer and executed by an on-board microprocessor which controls the functions of the printer.