​Combining some of the most popular Pokey related upgrades for the Atari 8-Bit computer system into a single compact main board, with two choices of satellite connector interface boards.

It Piggy-Backs the existing Pokey chip providing an extra socket for a 2nd Pokey chip to be added thus creating the right channel sound output (4 extra voices), and integrates the Transkey-II PS/2 keyboard adapter to allow virtually any PS/2 keyboard or numeric keypad to be utilized in tandem with the stock Atari keyboard (supports two simultaneous PS/2 devices).

​And for all of the Ultimate 1Meg owners, you'll be glad to know that the stereo/mono U1MB electronic switching has already been built-in, ready to be controlled without any additional hardware required. ​