ISR_RBU           873 dev/ic/mtd8xx.c 		if (status & (ISR_RXERI | ISR_RBU))
ISR_RBU           154 dev/ic/mtd8xxreg.h #define ISR_INTRS	(ISR_RBU | ISR_TBU | ISR_TI | ISR_RI | ISR_ETI)