ADAM 320K Center Directory Digital Data Pack

A data pack holding 320K rather than Coleco's 256K - a third party getting more onto the ADAM's own medium after Coleco had left the machine.

What it means

• Coleco's packs hold 256K, as 128 one-kilobyte blocks on each of two tracks.
• More capacity on the same mechanism means more tape in the shell, a denser layout, or both - and a drive in good alignment to read it.

The centre directory format is the standard one that most ADAM software expects; right directory packs were mostly Coleco's SuperGames.

HOW THE 320K WAS ACHIEVED is not recorded and is the interesting question here. The packaging or the accompanying documentation would answer it.