Code:

t = c.uae_gfxcard_type
if c.uae_gfxcard_size.explicit:
    value = c.uae_gfxcard_size.explicit
elif t == "":
    value = "0"
elif t == "PicassoII":
    value = "2"
elif t == "PicassoII+":
    value = "2"
elif t == "PicassoIV_Z2":
    value = "4"
elif t == "PicassoIV_Z3":
    value = "4"
elif t == "ZorroII":
    value = "4"
elif t == "ZorroIII":
    value = "16"
else:
    f.warning("Unrecognized graphics card: " + t)
    value = "0"