Does the 2 player Demo Derby use the same 3 board stack as the 4 player?

ChompingQuarters

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Does the 2 player Demo Derby use the same 3 board stack as the 4 player?

Just wondering if both the 2 player and the 4 player Demo Derby uses the same 3 stack board set with different roms?
 
the 4 player uses a panning ssio with an extra header installed to pick up the rest of the inputs.
 
The two player version came in both the MCR and Monoboard hardware. The MCR version is similar, but as mentioned it uses a modified panning SSIO. The 2 player and 4 player PCB's do have different program ROM's. I believe the 2 player version has four program ROM's and the 4 player version has 3 program ROM's. (1 socket is left empty)
-Mark
 
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