Code:

t = c.graphics_card
if c.uae_gfxcard_type.explicit:
    value = c.uae_gfxcard_type.explicit
elif t == "":
    value = ""
elif t == "uaegfx":
    if c.uae_cpu_24bit_addressing == "true":
        value = "ZorroII"
    else:
        value = "ZorroIII"
elif t == "uaegfx-z2":
    value = "ZorroII"
elif t == "uaegfx-z3":
    value = "ZorroIII"
elif t == "picasso-ii":
    value = "PicassoII"
elif t == "picasso-ii+":
    value = "PicassoII+"
elif t == "picasso-iv":
    if c.uae_cpu_24bit_addressing == "true":
        value = "PicassoIV_Z2"
    else:
        value = "PicassoIV_Z3"
elif t == "picasso-iv-z2":
    value = "PicassoIV_Z2"
elif t == "picasso-iv-z3":
    value = "PicassoIV_Z3"
# FIXME: cards are missing here
else:
    f.warning("Unrecognized graphics card: " + t)
    value = ""