I found a bug in Stella emulation regarding the "playfield SCORE mode". On real hardware, when the SCORE bit (D1 od CTRLPF) is set, the left half of the playfield gets color and priority of Player0, while the right half gets color and priority of Player1. In Stella, instead, the playfield gets the players' colors but keeps the same priority as the ball. Here is a simple test rom to show the problem: score_mode_test_NTSC.bin score_mode_test_PAL.bin In the test rom the left difficulty switch
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