TX39_INTRENABLE1_REG
tx_conf_write(tc, TX39_INTRENABLE1_REG, 0);
#define TX39_INTRENABLE_REG(x) (((x) - 1) * 4 + TX39_INTRENABLE1_REG)
(((x) - 1) * 4 + TX39_INTRENABLE1_REG) : \
iregs[1] = tx_conf_read(tc, TX39_INTRENABLE1_REG);
tx_conf_write(tc, TX39_INTRENABLE1_REG, 0);
tx_conf_write(tc, TX39_INTRENABLE1_REG, iregs[1]);