Symbol: RL_IDR4
src/add-ons/kernel/drivers/network/ether/rtl8139/dev/rl/if_rl.c
1718
CSR_WRITE_STREAM_4(sc, RL_IDR4, eaddr[1]);
src/add-ons/kernel/drivers/network/ether/rtl81xx/dev/re/if_re.c
3206
CSR_WRITE_4(sc, RL_IDR4, htole32(idr[1]));