MA35_IER_REG
ier = serial_in(p, MA35_IER_REG);
serial_out(p, MA35_IER_REG, ier & ~MA35_IER_THRE_IEN);
ier = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, ier & ~MA35_IER_THRE_IEN);
serial_out(up, MA35_IER_REG, ier | MA35_IER_THRE_IEN);
ier = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, ier);
ier = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, ier);
ier = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, ier);
serial_out(up, MA35_IER_REG, MA35_IER_CONFIG);
serial_out(up, MA35_IER_REG, 0);
ier = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, 0);
serial_out(up, MA35_IER_REG, ier);
up->console_int = serial_in(up, MA35_IER_REG);
serial_out(up, MA35_IER_REG, up->console_int);