ISR_XMITIR        100 dev/ic/com.c   #define ISR_SEND	(ISR_RXPL | ISR_XMODE | ISR_XMITIR)
ISR_XMITIR        100 dev/ic/com_subr.c #define ISR_SEND	(ISR_RXPL | ISR_XMODE | ISR_XMITIR)