No, it's far more likely that they hired him to assist with recent console releases like Daytona USA and Sega Rally. If Sega is like nearly any other company out there, they've probably lost a lot of the documentation on the hardware and software over the years. (Capcom actually lost literally all development documentation for the five GB Mega Man titles!)
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Try checking the MAME manual at http://docs.mamedev.org
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