HD64465_NIRR
DPRINTF((TEXT("%04x ", _reg_read_2(HD64465_NIRR))));
bitdisp(_reg_read_2(HD64465_NIRR));
bitdisp(_reg_read_2(HD64465_NIRR));
hd64465_reg_write_2(HD64465_NIRR, 0x0000);
r = hd64465_reg_read_2(HD64465_NIRR);