PFOUR_COLOR_OFF_OVERLAY
sc->sc_pixeloffset = PFOUR_COLOR_OFF_OVERLAY;
sc->sc_pixeloffset = PFOUR_COLOR_OFF_OVERLAY;
ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY;
PFOUR_COLOR_OFF_OVERLAY, ramsize);
poff = PFOUR_COLOR_OFF_OVERLAY + off;
oba->oba_paddr + PFOUR_COLOR_OFF_OVERLAY,
poff = PFOUR_COLOR_OFF_OVERLAY + off;