ClearSprites::
xor a
ld hl, wShadowOAM
ld b, wShadowOAMEnd - wShadowOAM
.loop
ld [hli], a
dec b
jr nz, .loop
ret
HideSprites::
ld a, SCREEN_HEIGHT_PX + OAM_Y_OFS
ld hl, wShadowOAMSprite00YCoord
ld de, OBJ_SIZE
ld b, OAM_COUNT
.loop
ld [hl], a
add hl, de
dec b
jr nz, .loop
ret