Hyper Olympic PCB missing IC

MartyMcfly

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Can anyone ID the missing IC?
Konami GX361
 

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  • GX361.png
    GX361.png
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There is no missing chip, this is the connector which plugs into the lower board. This whole daughtercard replaces a Konami custom chip.
They did that with other customs as well.
You can see anonther daughtercard lurking from under the soundboard, this should also have that "empty" socket on top.
 
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