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Line 17: The MCS6520 was used in [[Atari 400]]/[[Atari 800]] family of computers (to provide four joystick ports to the machine).<ref> {{Cite book \| title = Sams Computerfacts Technical Service Data - Atari 800 \| page = IV \| date = November 1984 \| url=http://www.atarimania.com/documents/Sams_Computer_facts_Atari_800.pdf}}</ref> The Tandy Color Computer used two MC6821s to provide I/O access to the video, audio and peripherals. ==References==

Peripheral Interface Adapter: Difference between revisions