HelenOS sources

CONFIG0           501 uspace/drv/nic/rtl8169/driver.c 	pio_write_8(rtl8169->regs + CONFIG0, 0);
CONFIG0           727 uspace/drv/nic/rtl8169/driver.c 	pio_write_8(rtl8169->regs + CONFIG0, 0);
HelenOS homepage, sources at GitHub