.globl _ubox_set_sprite_pat8_flip

WRTVRM = 0x004d

_ubox_set_sprite_pat8_flip::
	ld hl, #2
	add hl, sp

	ld e, (hl)
	inc hl
	ld d, (hl)
	inc hl

	ld l, (hl)
	ld h, #0
	add hl, hl
	add hl, hl
	add hl, hl
	ld bc, #0x3800
	add hl, bc

	ld b, #8
flip0:
	call flip_and_copy
	inc hl
	inc de
	djnz flip0
	ret

flip_and_copy:
	ld a, (de)
	ld c, a
  	rlca
  	rlca
  	xor c
 	and #0xaa
	xor c
	ld c, a
	rlca
	rlca
	rlca
	rrc c
	xor c
	and #0x66
	xor c

	jp WRTVRM