HelenOS sources

BMCR_Spd_100     1593 uspace/drv/nic/rtl8139/driver.c 		bmcr_val |= BMCR_Spd_100;
BMCR_Spd_100     1595 uspace/drv/nic/rtl8139/driver.c 		bmcr_val &= ~((uint16_t)BMCR_Spd_100);
HelenOS homepage, sources at GitHub