48k Memory Upgrade Board for the Atari 400

RAM upgrade board that expands an Atari 400's memory from 16k to 48k.

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A replacement RAM card for the Atari 400 home computer, which shipped with only 16k of memory. Most Atari applications and games from the era require at least 48k; this board replaces the stock card to bring the machine to full 48k RAM, keeping period hardware usable with modern software libraries.

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