EN0_TPSR
outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
outb_p(start_page, e8390_base + EN0_TPSR);
ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
ei_outb_p(start_page, e8390_base + EN0_TPSR);