HelenOS sources

VALUE_RW         1486 uspace/drv/nic/rtl8139/driver.c 	return VALUE_RW;
VALUE_RW         1544 uspace/drv/nic/rtl8139/driver.c 	if (rtl8139_pause_is_valid(rtl8139) != VALUE_RW)
HelenOS homepage, sources at GitHub