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The 6532 RAM-I/O-Timer (RIOT) was an integrated circuit made by MOS Technology, as well as second sources such as Rockwell. It incorporated 128 bytes of static RAM, two bidirectional 8-bit digital I/O ports, and a programmable timer. This high degree of integration made it quite popular in the late 1970s and early 1980s, as it could take the place of several different ICs. Perhaps its best-known use was in the Atari 2600 game console. This chip was also used in famous pinball machines made by Gottlieb, like Haunted House and Black Hole.
6532 ICs were available in 1 MHz and 2 MHz versions. The form factor was a JEDEC-standard 40-pin ceramic or plastic DIP.
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