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Model2b RS422 documentation?

biggestsonicfan

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Does anyone know if any games used the RS422 port? In my disassembly of Sonic the Fighters, I see that some data is sent to it on boot, and House of the Dead seems to talk to it as well.

I'd like to solder on a JST-NH connector to my filter board, but I need to know which capacitance EMI suppression filters to solder on as well. I'd like to match 1:1 with Sega's design (if any design was publicly released that is).
 
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