Page "Gamepad" Paragraph 11

The Master System has a similar brick-shaped appearance to the NES controller, but the d-pad ( named the " D button ") is square-shaped instead of cross-shaped, and there are no distinct " select " and " start " buttons.

The two action buttons were labeled " 1 " and " 2 ", with the " 1 " button doubling as a " Start " button.

Master System games were pausable only by accessing a button on the console itself.

Some early models of the pad featured a hole in the center of the joypad into which a small attachment could be screwed to make the pad function more like a joystick.

A proper joystick was later released for the machine.

Unlike the Nintendo machines of the time, the Sega machines used a common D-subminiature connector and standard protocol, enabling their pads to be used on different systems.