This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
You need to go to the GS Control Panel and change the Slots setting for the Slot your MB card is in to "Your Card". The 'standard' place for a MockingBoard is Slot 4. A few early programs require that the board be there in order to work; but, most programs which use MB will let you specify the Slot. A few games and other wares require modifications or interface software to work with MB on a GS. ---------------------------
 
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