* Ports: 2 joystick ports, 1 cartridge port, 1 expansion connector, power in, RF output

* Atari CX7800, two joystick ports on lower front panel.

Other uses for the joystick ports include light pens.

Interfaces included an expansion slot, ROM cartridge socket, dual RS-232 ports, proprietary QLAN local area network ports, dual joystick ports and an external Microdrive bus.

Unusually, the QL used BS 6312 type 630W sockets for the RS-232 and joystick ports, except for QLs built by Samsung for export markets, which had DE-9 sockets.

The machine featured an all-new grey case featuring a spring-loaded keyboard, dual joystick ports, and a built-in cassette recorder dubbed the " Datacorder " ( like the Amstrad CPC 464 ), but was in most respects identical to the ZX Spectrum 128.

Sinclair also released the ZX Interface 2 which added two joystick ports and a ROM cartridge port.

The early Spectrum models ' great success as a games platform came in spite of its lack of built-in joystick ports, primitive sound generation, and colour support that was optimised for text display: the hardware limitations of the platform required a particular level of creativity from video game designers.

The original Tandy 1000 featured a proprietary keyboard port ( using an 8-pin DIN connector ) along with 2 joystick ports ( using 6-pin DIN connectors ) on the front of the case.

The TL line also allowed the onboard floppy controller, parallel port, and joystick ports to be disabled, which the earlier models did not.

* I / O devices ( floppy disk drives, joystick, mouse and serial ports )

From left to right: break button, MIDI IN / OUT ports, joystick port, mouse port, reset button, Euroconnector expansion port, cassette jack, stereo sound output / lightpen input, power button, SCART socket, power / RF socket

Two joystick ports were built into the PCjr, evidence of IBM's goal for marketing the PCjr as a home-friendly machine.

Other than the Tandy 1000 and Amstrad IBM PC compatible lines a few years later, the dual built-in joystick ports introduced by the PCjr never became standard on IBM PC compatibles, and have not been seen since.

Also, in addition to the joystick ports having a different connector than used on the " game adapter " ISA card for PC compatibles, they required joysticks that had a different electrical resistance range in their X / Y axis controllers, necessitating the use of PCjr-specific joysticks ( or generic joysticks that had a dual-mode switch ).

* Input / Output: cassette port, light-pen port, two joystick ports, RGB monitor port, composite video port, television adapter output port, audio port, wired keyboard port, infrared keyboard sensor, serial port, two cartridge slots

The official reason for changing the joystick ports was to reduce RF interference.

Additionally, with the Plus / 4, Commodore abandoned the Atari-style joystick ports used on the C64, replacing them with a proprietary mini-DIN port that was said to be less prone to emit RF interference.

legacy MIDI and joystick ports,

The pad hooked into the computer using the analog signals of the joystick ports ( the so-called " paddle " inputs ), which meant that it had a fairly low resolution and tended to jostle the cursor if moved during use.

* twin joystick ports

Although the TS2068's main improvements over the original Spectrum were in areas that had come in for widespread criticism ( graphics, sound, keyboard, instant load software cartridges and — to a lesser extent — the lack of joystick ports ), it was not used as the basis for the Spectrum's successors.

** 2 × 9-pin mouse / joystick ports

For example, the lunar lander test models were controlled with a joystick.

The Atari standard joystick, developed for the Atari 2600, released in 1977, was a digital joystick, with a single fire button, and connected via a DE-9 connector, the electrical specifications of which were for many years the de-facto standard digital joystick specification.

One other difference in these controllers is that the earliest releases of the silver joystick were removable.

Several types of joysticks were made, including the Force Feedback 2, the 3D Pro, and the regular SideWinder joystick.

As the game port only has direct support for 4 distinct buttons, special device drivers were written to read pins and input meant for the second joystick ( i. e. by mapping button 5 through 8 to the signals to the axis pins meant for the second joystick ), using some normally " unused " pins, or changing the joystick's circuits ( and related software ) to read a 4-bit state code from the four button inputs, thus giving up to 16 button combinations ).

Packages containing only a console and a joystick were also available, with the keyboard and the lightgun available separately.

Onscreen options were chosen by pushing the fire button on the joystick.

The game units were particularly known for failure of the optical joystick unit ; Stern suffered the cancellation of about 4, 200 orders for new games because of previous purchasers ' bad experiences with these joysticks.

Joystick movements and buttons were mapped to unused keyboard codes, allowing the joystick to be used in many DOS games that were written for keyboard control.

The monkeys were trained to reach and grasp objects on a computer screen by manipulating a joystick while corresponding movements by a robot arm were hidden.

A two joystick control scheme was developed to provide the player with more precise controls, and enemies with different behaviors were added to make the game challenging.

The dual joystick design was developed by Eugene Jarvis who was frustrated by single joystick controls that were common at the time.

This method of play inspired Jarvis to add a second joystick dedicated to aiming the direction projectiles were shot.

Most conversions did not have a dual joystick and were received less favorably by critics.

People made their own game compilations, adding popular ( sometimes DTV-fixed ) games that were not in the original DTV, added boot menus to make homebrew software development easier or enable new features, for example transfer programs like DTVtrans for transferring data from PC to DTV RAM and vice versa via the PC parallel port ( or USB ) and the DTV joystick port.

They were typically limited to one fire button rather than three ; the different moves are achieved by combining different joystick directions with a fire button press.

The missiles were originally steered by joystick control i. e. Manual Command to Line of Sight ( MCLOS ), later updated to the Semi-Automatic Command to Line of Sight ( SACLOS ) system where the controller merely sights the target.

The standard DE-9 joystick connector doubled as a mouse interface, compatible with the same mice used by the Lisa and early Macintosh computers.

The XEGS was released in a basic model with a grey colored standard CX-40 joystick, and the deluxe model bundled with the joystick and two peripherals: a keyboard, which allowed it to function as a home computer, and the XG-1 light gun-the first light gun produced by Atari, which is also compatible with the Atari 7800 and Atari 2600.

** 2 × analog joystick ( compatible with STE and Jaguar )

It used the Atari 2600 standard DE-9 connector and was primary designed to work with the ZX Spectrum Kempston joystick interface but also with the compatible ports built into other home computers such as the Amstrad CPC, Commodore 64 (& Vic-20 ) and later Commodore Amiga and Atari ST.