tx_free_start     916 dev/ic/acx.c   	idx = bd->tx_free_start;
tx_free_start    1054 dev/ic/acx.c   	bd->tx_free_start = idx;
tx_free_start    2079 dev/ic/acx.c   	bd->tx_free_start = 0;
tx_free_start     277 dev/ic/acxvar.h 	int			tx_free_start;