Atari 410
SIO · captive cable
The first Atari 400/800 cassette recorder stores programs and data on standard cassettes. Versions included a mains-powered model and the 410P with an external power supply.

HARDWARE / PERIPHERALS
Atari cassette recorders, disk drives, printers, controllers and interfaces for the 400/800, XL and XE families.
Store programs and data on cassettes, which may also contain a separate audio track. Models differ in power supply, mechanism and number of SIO sockets.
SIO · captive cable
The first Atari 400/800 cassette recorder stores programs and data on standard cassettes. Versions included a mains-powered model and the 410P with an external power supply.
SIO · two sockets
An XL-styled cassette recorder with two SIO sockets. Two versions were made: Sanyo's 1010S and Chelco's 1010C.
SIO · cassette tape
A recorder for programs and data on standard cassettes. A tape counter helps locate recordings; separate buttons control playback, recording and winding.
SIO · powered by the computer
A cassette recorder powered directly through SIO. Its captive computer cable eliminates the need for a separate power supply.
5¼-inch drives: from single-sided recording on the 810, through enhanced density on the 1050, to double-sided recording on the XF551.
SIO · 5¼-inch floppy disks
A 5¼-inch drive from the first Atari 400/800 peripheral generation. A standard unit records one side at single density and connects through SIO.
SIO · 5¼-inch floppy disks
A single-sided 5¼-inch drive supporting SD single density and ED enhanced density, increasing capacity from 90 to 130 KiB. DD double-density recording requires an upgrade.
SIO · 5¼-inch floppy disks
A double-sided 5¼-inch drive with a nominal DD capacity of 360 KiB. Full capacity requires a suitable DOS, such as DOS XE; the initially bundled DOS 2.5 supports only smaller formats.
Dot-matrix, thermal and daisy-wheel printers, and a four-colour plotter. Most use SIO; the 825 requires the Atari 850 interface.
SIO · dot-matrix printing
A first-generation 400/800 printer. It prints 40 characters per line on roll paper using an ink ribbon.
SIO · thermal printing
A 40-column thermal printer. Its head forms characters by heating the paper, so no ink ribbon is needed.
Parallel port · through Atari 850
A dot-matrix printer offering 80 columns and proportional printing. It does not connect directly to SIO; Atari computers use it through the 850 module.
SIO · four-colour plotter
Draws text and graphics with four replaceable pens on roll paper. Variable character size and direction allow chart labels and drawings.
SIO · dot-matrix printing
A printer for text, tables and listings, styled to match XL-generation devices. It uses an ink ribbon and supports variable character width and line spacing, among other features.
SIO · formed-character printing
A letter-quality printer that strikes formed characters instead of composing them from dots. Intended for correspondence and text documents; it uses a replaceable ink roller.
SIO · dot-matrix printing
An 80-column printer with a graphics mode and continuous-paper feed. It has two SIO sockets and a built-in power supply.
SIO · daisy-wheel printing
A daisy-wheel printer for text documents. Features include bold, underline, superscript and subscript. The wheel strikes preformed characters, like a typewriter.
SIO · dot-matrix printing
An XE-generation text and graphics printer. It prints bidirectionally and supports dot graphics; two SIO sockets allow it to sit between other devices.
Controller ports accept joysticks, paddles, a trackball, graphics tablet and numeric keypad. Each device requires appropriate software support.
Controller port · T / J modes
A trackball with two buttons and a mode switch. J emulates a joystick; T reports variable-speed ball movement and needs appropriate software support.
Controller port · analogue input
A pair of paddle controllers with buttons, connected to one socket. Software reads each potentiometer's position. Games supporting only joysticks do not automatically work with paddles.
Controller port · digital input
A joystick with one button and eight directions. Directions are read as switch states; it is not analogue. The Atari VCS used the same standard.
Controller port · graphics tablet
A tablet for drawing with a stylus or finger, sold with the AtariArtist cartridge. It reads positions on its surface; tablet and stylus buttons select program functions.
Controller port 2 · numeric keypad
A separate block of number and function keys. It sends key states through the controller port and requires a driver or CX85-aware program; it does not directly replace the computer keyboard.
Controller port · light gun
The XEGS light gun lets players aim at screen objects in supported games. Joysticks and light guns require different software handling.
RS-232 and printer ports, 80-column video and telephone modems. Not all devices use SIO: the XEP80 communicates through a controller port.
SIO → RS-232 / parallel port
A module with four RS-232 serial ports and one printer port. It connects Atari to devices such as the 825 printer and 830 modem. Devices with their own SIO do not need it.
SIO · 300 bit/s telephone modem
A Bell 103 modem with built-in ModemLink communications software. It enabled BBS and computer connections over a telephone line without an Atari 850 interface.
SIO or RS-232 · 300 / 1200 bit/s
A modem with automatic dialling and answering. Alongside SIO, it has RS-232 for use with other computers. It supports AT commands.
Controller port → monitor / printer
An external 80-column display module with a parallel printer port and its own monitor output. It works with programs using standard screen handling; it does not automatically expand every application's display.
SIO · 300 bit/s telephone modem
A Bell 103 modem connecting directly to a telephone line. It came with XE Term on disk for terminal use and file transfers.