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The mainframe communicates with the plug-ins via the Serial Data Interface (SDI). | The mainframe communicates with the plug-ins via the Serial Data Interface (SDI). | ||
SDI was designed by [[Lester Larson]]. | SDI was designed by [[Lester Larson]]. | ||
This comprises three signals: | This communication bus comprises three signals: | ||
* SDI clock | * SDI clock | ||
* SDI mainframe to plug-in | * SDI mainframe to plug-in |