EN1_CURPAG
rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);