Another small update.
Some time ago I designed a device that can replace all the three Namco MCUs marked '60A1' , '63A1' and '64A1', you can read more about in my previous post :
The replacement was working fine but I later realized that it could not fit well on certain boards due to its dimensions so I made a more compact board layout using smaller surface-mounted packages.Here's a side-by-side of the new board with the orginal custom '64A1' used on Namco System 1 games :
Like the previous revision also this last one can substitute the three Namco '6xA1' MCUs, you can simply select which one you need by setting a 2-way DIP switch located on bottom side :
Here's the replacement set as '64A1 and installed on a Splatterhouse conversion PCB :
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