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It's not the ROMs themselves, it's the operator settings.In fact, most machines don't have "home ROMs". People just set the machine to free play in the settings. That's how I've done it with all the machines I've owned.In fact, if you have a table in TPA with Pro Mode enabled, you can go into the operator menu and adjust this feature yourself. Though, of course, you'll have no way of adding credits.
It's not the ROMs themselves, it's the operator settings.
In fact, most machines don't have "home ROMs". People just set the machine to free play in the settings. That's how I've done it with all the machines I've owned.
In fact, if you have a table in TPA with Pro Mode enabled, you can go into the operator menu and adjust this feature yourself. Though, of course, you'll have no way of adding credits.