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50684: Accept A Set Graphics Parameter
Returns if the saved marker is clear. Otherwise accepts a graphics parameter that is still set.
AcceptSetGraphicsParameter 50684 LD A,(40976) Return if the display mode is zero.
50687 AND A
50688 RET Z
50689 LD A,(41013) Jump to AcceptSetGraphicsParameter_SignalStepFailedAgain if the room graphics parameter is not 255.
50692 CP 255
50694 JR NZ,AcceptSetGraphicsParameter_SignalStepFailedAgain
50696 OR %00000001 Reset the zero flag.
50698 RET Return.
AcceptSetGraphicsParameter_SignalStepFailedAgain 50699 XOR A Clear A.
50700 RET Return.
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