TAC-2

[Image:Normal tac2.jpg|right|thumb|TAC-2 joystick]
The Totally Accurate Controller MK2 is an Atari 2600-compatible digital joystick game controller. It was commonly used with 1980s microcomputers such as the TI-99/4A, Atari 8-bit computers, Atari ST, Commodore 64 and Amiga.
It was manufactured by Suncom in Illinois.

US-made model

The joystick's square base came in two colours, black or creamy white.
It had a list price of $19.95 when it was introduced.

Features

Large arcade-style ball top handle
One 8-way stick with short throw
Two fire buttons

Construction

The joystick has no microswitches. Instead, it uses a metal ball that short-circuits contacts around the bottom shaft of the controller.
The handle has a customized tyre valve of rubber for self-centering. The handle is covered with a chrome sleeve.
The fire button switches are brass contact plates which tend to become corroded and thus need care every now and then.

China-made model

A cost reduced version was released, in which the tyre valve was replaced with a white rubber gasket that held a black plastic tube. The metal ball was only plugged into it, and the brass plates in the buttons were replaced with the wire of the redesigned button return spring.
It is only known in black and can be recognized by its shiny plastic stick instead of the chrome valve sleeve, and deeper red buttons instead of the original orange.