Atic Atac: Routine at 9DF8

9DF8: Set Attributes Rotated Half

The handler of SetGraphicAttributes for a graphic that is turned a half turn. This is the same as SetAttributes_Mirrored, except that it starts from the end of the last row.
SetAttributes_RotatedHalf	9DF8	POP BC	Restore the attribute and graphic ID from the stack.
	9DF9	CALL GetGraphicAttributeDetails	Call GetGraphicAttributeDetails to get the details of the attributes.
	9DFC	CALL FindLastRow	Call FindLastRow to move on to the last row.
	9DFF	CALL AddWidthToAddress	Call AddWidthToAddress to move on to the end of the last row.
	9E02	DEC DE	Move DE back one byte.
SetAttributes_RotatedHalf_Row	9E03	PUSH BC	Stash the width and height on the stack.
	9E04	PUSH HL	Stash the attribute buffer address on the stack.
SetAttributes_RotatedHalf_Cell	9E05	LD A,(DE)	Fetch the next attribute.
	9E06	DEC DE	Move DE back one byte.
	9E07	AND A	Jump to SetAttributes_RotatedHalf_Next if it is 00.
	9E08	JR Z,SetAttributes_RotatedHalf_Next	Jump to SetAttributes_RotatedHalf_Next if it is 00.
	9E0A	CP $FF	Jump to SetAttributes_RotatedHalf_Write if it is not FF.
	9E0C	JR NZ,SetAttributes_RotatedHalf_Write	Jump to SetAttributes_RotatedHalf_Write if it is not FF.
	9E0E	LD A,($5E1A)	Fetch the room attribute from CurrentRoom_Attribute.
SetAttributes_RotatedHalf_Write	9E11	LD (HL),A	Write A to the attribute buffer.
SetAttributes_RotatedHalf_Next	9E12	INC L	Move HL on to the next cell.
	9E13	DJNZ SetAttributes_RotatedHalf_Cell	Decrease the width by one and loop back to SetAttributes_RotatedHalf_Cell until all of the cells in the row have been set.
	9E15	POP HL	Restore the attribute buffer address from the stack.
	9E16	LD BC,$0020	BC=0020 (the size of a row of the attribute buffer).
	9E19	AND A	Move up a row.
	9E1A	SBC HL,BC	Move up a row.
	9E1C	POP BC	Restore the width and height from the stack.
	9E1D	DEC C	Decrease the height by one and loop back to SetAttributes_RotatedHalf_Row until all of the rows have been set.
	9E1E	JR NZ,SetAttributes_RotatedHalf_Row
	9E20	RET	Return.