VR_ISR           1182 dev/pci/if_vr.c 		status = CSR_READ_2(sc, VR_ISR);
VR_ISR           1184 dev/pci/if_vr.c 			CSR_WRITE_2(sc, VR_ISR, status);
VR_ISR           1484 dev/pci/if_vr.c 	CSR_WRITE_2(sc, VR_ISR, 0xFFFF);