Commodore had expressed some interest in their new system, and showed demos of it on an add-on card running inside an Amiga 2000.

You can add it in the form of a $130 add-on card, but that's cheating.

Contrast this with SBus, used in the same machines to connect add-on cards to the motherboard.

There was a time when you needed an add-on card to get anything more than beeps out of your computer's PC speaker.

This allows resolutions up to 2560x1600, which are supported by many add-on graphic cards.

Fortunately, computers' sound capabilities increased greatly in the 1980s, when several manufacturers introduced add-on cards dedicated to controlling sound.

Three internal expansion slots could be used for add-on cards such as additional serial ports and a video board that allowed bitmap graphics.

But the price of The Brooklyn Bridge is much lower than the cost of acquiring the add-on cards necessary for a network.

But it requires a costly color monitor as well as the add-on card.

The video slot presented clocks, all 12-bits of digital video, Genlock signals, and some control lines for use to add-on cards.