Apple II and Apple II Plus Language Card
The Language Card ia a 16K RAM card that upgrades an Apple II into a full 64K RAM computer. See the photos.
The Apple II Plus had a total of 48 KB of RAM, expandable to 64 KB by means of the language card, an expansion card that could be installed in the computer's slot 0. The Apple's 6502 microprocessor could support a maximum of 64 KB of memory, and a machine with 48 KB RAM reached this limit because of the additional 16 KB of read-only memory and I/O addresses.
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