(1) Only when (Priority number) ≤ (Color calculation condition number)
Only when (2) (Priority number) = (Color calculation condition number)
(3) Only when (Priority number) ≥ (Color calculation condition number)
(4) Only when the most significant bit of color data is 1

The color calculation condition number is a 3-bit value for comparing the size of the priority number selected for each sprite character with the size specified in the sprite control register. These conditions are valid only when the SPCCEN bit of the color operation control register is 1, and when it is 0, color operation is not performed.