Extended 80 Column

The Extended 80 Column card was released in several versions.  The Memory Master is an early model, reduced-chip substitute, for Apple's Extended 80-Column card, providing 80 columns + 64K RAM.  The Rev A Extended 80-Column Card, or the Qutron-1, is a second generation revision. 

Memory Master
Extended 80 Column
Extended 80 Column - Rev A
Extended 80 Column - Rev B
Extended 80 Column Brochure

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