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Topics - huygens

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Mega EverDrive / Genesis controller compatibility fixes for SMS games
« on: December 29, 2013, 10:53 PM »
Posted about this in the Everdrive MD subforum as well. Thought it might be a bit more visible as it's own topic. There are a few master system games that don't work with genesis controllers. Note this is a problem with the games themselves not the Everdrive.

Alien Syndrome
Bomber Raid
Great Volleyball
Montazuma's Revenge
Penguin Land
Tennis Ace
Shanghai
Where in the World is Carmen Sandiego?
Wonder boy in Monster Land

I believe these games don't work due to the Japanese/Export check the games perform. Part of the region check toggles the select line on the controller port. It's supposed to be reset but these games fail to do that.

I patched the games to reset the select line or bypass the part of the region detection code that writes to the select line.

These were patched to reset the select lines (Please check crc of Patched rom if it doesn't work):
Montazuma's Revenge (8fc6bb9c)
Penguin Land (cb437bc2)
Wonder boy in Monster Land (cdc3c8df)
Where in the World is Carmen Sandiego? (c63e4d42)
Shanghai (91387e3f)

Region detection patch:
Alien Syndrome (6b3e06ff)
Bomber Raid (c880978a)
Great Volleyball (bd29dabf)
Tennis Ace (b0b086bb)

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