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MOS Technology 6581
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<p>The <a href="/facts/MOS_Technology/1eKsjBS1">MOS Technology</a> 6581/8580 SID (Sound Interface Device) is the built-in <a href="/facts/Programmable_sound_generator/rxCCjtgg">programmable sound generator</a> chip of the <a href="/facts/Commodore_CBM-II/JQEW0QDC">Commodore CBM-II</a>, <a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a>, <a href="/facts/Commodore_128/vKlttwT1">Commodore 128</a>, and <a href="/facts/MAX_Machine/rdznG3zg">MAX Machine</a> <a href="/facts/Home_computer/CDEPVd1T">home computers</a>. </p><p>Together with the <a href="/facts/MOS_Technology_VIC-II/3jLPsDD5">VIC-II</a> graphics chip, the SID was instrumental in making the C64 the best-selling home computer in history, and is partly credited for initiating the <a href="/facts/Demoscene/yKunscS7">demoscene</a>. </p>