Atic Atac: Routine at 9AEF

Mirrored like BLIT_SPRITE_MIRRORED, and turned over as well: the call to START_AT_LAST_ROW moves the data pointer to the last row before anything is drawn, so the rows come out in the opposite order.

This is why there are eight drawing routines in each family rather than one. They are the eight symmetries of a rectangle -- the four ways to flip it (as stored, mirrored, upside down, both, which is a half turn) and the same four turned through a right angle -- and the top three bits of a door's or piece of furniture's +$05 pick between them.

Mirrored like BLIT_SPRITE_MIRRORED, and turned over as well: the call to START_AT_LAST_ROW moves the data pointer to the last row before anything is drawn, so the rows come out in the opposite order. This is why there are eight drawing routines in each family rather than one. They are the eight symmetries of a rectangle -- the four ways to flip it (as stored, mirrored, upside down, both, which is a half turn) and the same four turned through a right angle -- and the top three bits of a door's or piece of furniture's +$05 pick between them.
BLIT_SPRITE_FLIPPED	9AEF	POP BC	The combining opcode.
	9AF0	CALL SPRITE_COMBINE_OPCODE
	9AF3	LD (BLIT_FLIPPED_OP),A
	9AF6	CALL FETCH_SPRITE
	9AF9	CALL START_AT_LAST_ROW	Move to the last row: this one draws bottom to top.
	9AFC	CALL NEXT_SPRITE_ROW
BLIT_SPRITE_FLIPPED_0	9AFF	PUSH BC
	9B00	PUSH HL
BLIT_SPRITE_FLIPPED_1	9B01	DEC DE
	9B02	LD A,(DE)
	9B03	CALL REVERSE_BITS
BLIT_FLIPPED_OP	9B06	NOP
	9B07	LD (HL),A
	9B08	INC L
	9B09	DJNZ BLIT_SPRITE_FLIPPED_1
	9B0B	POP HL
	9B0C	CALL SCREEN_ROW_UP
	9B0F	POP BC
	9B10	DEC C
	9B11	JR NZ,BLIT_SPRITE_FLIPPED_0
	9B13	RET