BIU_ISR
junk = ISP_READ(isp, BIU_ISR);
ISP_READ(isp, BIU_ISR), ISP_READ(isp, BIU_SEMA));
if (isp_pci_rd_debounced(isp, BIU_ISR, &isr)) {
isr = BXR2(pcs, IspVirt2Off(isp, BIU_ISR));
if (!(BXR2(pcs, IspVirt2Off(isp, BIU_ISR)) & BIU2100_ISR_RISC_INT)) {
isr = BXR2(sbc, IspVirt2Off(isp, BIU_ISR));