spr2hw_pos
lofsprite[0] = spr2hw_pos(vs, hs);
shfsprite[0] = spr2hw_pos(vs + 1, hs);
lofsprite[0] = spr2hw_pos(vs, hs) | (IS_AGA && (par->fmode & FMODE_BSCAN2) ? 0x80 : 0);