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C5FC: Accept A Set Graphics Parameter
Returns if the saved marker is clear. Otherwise accepts a graphics parameter that is still set.
AcceptSetGraphicsParameter C5FC LD A,($A010) Return if the display mode is zero.
C5FF AND A
C600 RET Z
C601 LD A,($A035) Jump to AcceptSetGraphicsParameter_SignalStepFailedAgain if the room graphics parameter is not FF.
C604 CP $FF
C606 JR NZ,AcceptSetGraphicsParameter_SignalStepFailedAgain
C608 OR %00000001 Reset the zero flag.
C60A RET Return.
AcceptSetGraphicsParameter_SignalStepFailedAgain C60B XOR A Clear A.
C60C RET Return.
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