Atari 400 Expansion
48K memory expansion kit, designed to upgrade the 8K or 16K Atari 400,
is available from Atari.
The board is available for $130 installed at Atari
Regional Repair Centers, or, for those who prefer to install the board
themselves, it will be available through the Atari Program Exchange for
1265 Borregas Ave.
P.O. Box 427
Sunnyvale, CA 94086