HelenOS sources

TCR_NORMAL        219 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_TCR, TCR_NORMAL);
TCR_NORMAL        347 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_TCR, TCR_NORMAL);
TCR_NORMAL        391 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_TCR, TCR_NORMAL);
HelenOS homepage, sources at GitHub