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64592: Set inverse and over bits
Used by the routines at DRAW_LINE and FREEHAND_ROUTINE.
SET_INVERSE_AND_OVER 64592 RES 0,(IY+87) Reset temporary 'over' bit
64596 RES 2,(IY+87) Reset temporary 'inverse' bit
64600 BIT 3,(IX+0) Check this graphic instruction's over bit
64604 JR Z,SET_INVERSE_AND_OVER_0 If not set, skip setting it
64606 SET 0,(IY+87) Set temporary 'over' bit
SET_INVERSE_AND_OVER_0 64610 BIT 4,(IX+0) Check this graphic instruction's inverse bit
64614 RET Z If not set, return
64615 SET 2,(IY+87) Set temporary 'inverse' bit
64619 RET
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