Originally Posted by Photon
While waiting for the eminent WHDLoad slave coders to clear the foggy crystal ball, it tells me the only way to get rid of the slowdowns is a new slave with some luvin' on the interrupts, if it's at all possible.
Not sure if you can do much on the "slave programming" side. The ACA1232 is an async design, so it does not get the full 3.5MBytes/sec on chipram. If the game uses almost all DMA slots , then it may be impossible to reach the same speed that a sync 7MHz 68000 can achieve.