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r15470 Monday 20th February, 2012 at 08:41:18 UTC by Aaron Giles
Williams blits with bit 2 set take approximately 2x as long because
they are bus-shared with RAM. Should impact some timing behaviors
such as later levels in Robotron, where approximately 10% of the
blits are done with bit 2 set. Further refinements may be necessary
but this addresses the most significant issue. [Sean Riddle, Aaron Giles]
[src/mame/video]williams.c

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