ctx.addBel(name="SLICE_X1Y1", type="SLICE_LUT4", loc=Loc(1, 1, 0), gb=False)
ctx.addBel(name="IO0_I", type="$nextpnr_ibuf", loc=Loc(0, 0, 0), gb=False)
ctx.addBel(name="IO1_O", type="$nextpnr_obuf", loc=Loc(1, 0, 0), gb=False)