pcdisplay_cnattach
if (pcdisplay_cnattach(X86_BUS_SPACE_IO, X86_BUS_SPACE_MEM) == 0)
if (pcdisplay_cnattach(I386_BUS_SPACE_IO, I386_BUS_SPACE_MEM) == 0)
int pcdisplay_cnattach(bus_space_tag_t, bus_space_tag_t);