Atari 5200

Atari 5200

Manufacturer	Atari Inc.
Type	Video game console
Generation	Second generation
Lifespan	November 1982 (United States/Canada)
Discontinued	May 1984
Media	ROM cartridge
CPU	MOS 6502C @ 1.79 MHz
Controller input	Joystick Trak-Ball
Predecessor	Atari 2600
Successor	Atari 7800

Atari 5200 system with controller, game cartridges and packaging

The Atari 5200 SuperSystem, or simply the Atari 5200, is a video game console that was introduced in 1982 by Atari Inc. as a higher end complimentary console for the popular Atari 2600. The 5200 was created to compete with the Intellivision, but wound up more directly competing with the ColecoVision shortly after its release.

The 5200 was based on Atari Inc.'s existing 400/800 computers and the internal hardware was almost identical, although software was not directly compatible between the two systems. The 5200's controllers feature an analog joystick and a numeric keypad along with start, pause and reset buttons. The 360-degree non-centering joystick was touted as offering more control than the four-position joystick controller offered with the Atari 2600.

In August of 2009, video game website IGN placed the 5200 23rd out of the 25 greatest video game consoles of all time.

Hardware

Much of the technology in the Atari 8-bit family of home computer systems were originally developed as a second-generation games console intended to replace the 2600. However, as the system was reaching completion, the personal computer revolution was starting with the release of machines like the Commodore PET, TRS-80 and Apple II. These machines were similar in technological terms to the 2600, but sold for much higher prices with associated higher profit margins. Atari's management decided to enter this market, and the new technology was repackaged into the Atari 400 and 800, hitting the market in 1979.

In the early 1980s a second wave of games consoles came to market, notably the Intellivision and numerous other announcements and releases. Being behind the technological curve was not entirely surprising; the chipset used in the 400 and 800 was designed because they were aware the 2600 would be obsolete by the 1980 time frame. What was surprising was the sudden entry into the market of new competition, whose machines quickly cut off the sales of the 2600. Atari decided to re-enter the games market with a design that closely matched their original 1978 specifications. In its prototype stage, the Atari 5200 was originally called the "Atari Video System X - Advanced Video Computer System", and was codenamed "Pam" after a female employee at Atari Inc. It is also rumored that PAM actually stood for "Personal Arcade Machine", as the majority of games for the system ended up being arcade conversions. Actual working Atari Video System X machines, whose hardware is 100% identical to the Atari 5200 do exist, but they are extremely rare.

The initial 1982 release of the system featured four controller ports, where nearly all other systems of the day had only two ports. The 5200 also featured a revolutionary new controller with an analog joystick, numeric keypad, two fire buttons on each side of the controller and game function keys for Start, Pause, and Reset. The 5200 also featured the innovation of the first automatic TV switchbox, allowing it to automatically switch from regular TV viewing to the game system signal when the system was activated. Previous RF adapters required the user to slide a switch on the adapter by hand. This unique RF box was also where the power supply connected in a unique dual power/television signal setup similar to the RCA Studio II's. A single cable coming out of the 5200 plugged into the switch box and was used for both electricity and the television signal.

The 1983 revision of the Atari 5200 has two controller ports instead of four, and a change back to the more conventional separate power supply and standard non-autoswitching RF switch. It also has changes in the cartridge port address lines to allow for the Atari 2600 adapter released that year. While the adapter was only made to work on the two-port version, modifications can be made to the four-port to make it line-compatible. In fact, towards the end of the four-port model's production run, there were a limited number of consoles produced which included these modifications. These consoles can be identified by an asterisk in their serial number.

Controllers

The controller prototypes used in the electrical development lab used a yoke and gimbal mechanism that came from an RC airplane controller kit. This simple design gave very nice smooth linear control and was highly reliable. The production controllers were quite different and a great disappointment to the electrical and software development teams. The design of the analog joystick, which used a weak rubber boot rather than springs to provide centering, proved to be ungainly and unreliable. They ultimately alienated consumers and quickly became the Achilles' heel of the system because of their combination of an overly complex mechanical design with a very low-cost internal flex circuit system. Another major flaw of the controllers was that the design did not translate into a linear acceleration from the center through the arc of the stick travel. The controllers did, however, include a pause button, a unique feature at the time. Various third party replacement joysticks were also released, including those made by Wico.

Atari Inc. released the Pro-Line Trak-Ball controller for the system, which was used primarily for gaming titles such as Centipede or Defender. A paddle controller and an updated self-centering version of the original controller were also in development, but never made it to market.

The primary controller was ranked the 10th worst video game controller by IGN editor Craig Harris.

Internal differences between the 5200 and the 400/800

Although the Atari 5200's internal design was extensively based on that of the 400/800 home computers, the differences were sufficient that games designed for one would not run directly on the other.

One of the most obvious differences was the 5200's lack of a keyboard. However, there were several others:

• The 400/800's 10 KB operating system was replaced with a simpler 2 KB BIOS, of which 1 KB is the built-in character set.
• A number of important registers, such as those of the GTIA and POKEY chips appear at different memory locations.
• The purpose of some registers changed slightly on the 5200.
• The 5200's analog joysticks required different input handling to the traditional digital joystick input on the 400/800. (However, the 5200 reassigned/rewired two of the 400/800's existing analog paddle registers for each bi-directional analog joystick input).

Atari Corp.'s later XE Games System revisited the idea of a console based on the 400/800 hardware. However, as this was essentially just a 65XE computer with a detachable keyboard, it was able to run most of the home computer titles directly.

Technical specifications

• CPU: Custom MOS 6502C @ 1.79 MHz (not a 65c02).
• Support Hardware: 2 custom VLSI chips
• Maximum Screen Resolution: 320×192 resolution, 16 (out of 256) on-screen colors per scan line. Palette can be changed at every scan line using ANTIC display list interrupts, allowing all 256 colors to be displayed at once.
• Graphics: ANTIC and GTIA
• Sound: 4-channel sound via the POKEY chip which also handles keyboard scanning, serial I/O, high resolution interrupt capable timers (single cycle accurate), and random number generation.
• RAM: 16 KB
• ROM:
  • 2 KB on-board BIOS for system startup and interrupt routing.
  • 32 KB ROM window for standard game cartridges, expandable using bank switching techniques.
• Physical Size: 13" × 15" × 4.25"

Launch titles

• Super Breakout
• Galaxian
• Space Invaders
• Asteroids (Prototype)

See also

• History of Atari
• List of Atari 5200 games
• Atari 8-bit family

External links

• AtariAge – Comprehensive Atari 5200 database and information
• Atari Museum