Hi gang -
I'm trying to help someone troubleshoot a problem remotely, so I don't have the game in front of me. His GI is getting an "Island error" message. When running the motor test the island seems to operate correctly, starting and stopping, with the related switches opening and closing as expected. I'm wondering if the island has a "home" position, and if so how the game determines it. Or if there is no home position, how does the game know what position the island is in? Unless I'm missing it in the manual I can't find anything mentioned about island error, so no help there.
I don't see how this can be related, but I'm not a big believer in coincidences so I'll add a bit of background. This game had an MPU issue so I loaned its owner a spare MPU board (moved over the game ROM and NVRAM). The game was working correctly with this MPU. He got a new Rottendog MPU, I moved the game ROM and NVRAM to the new Rottendog board, he installed it, and that's when he started see the island error.