OUTMAILBOX0
mbox = ISP_READ(isp, OUTMAILBOX0);
val = ISP_READ(isp, OUTMAILBOX0);
if (ISP_READ(isp, OUTMAILBOX0) == 0) {
val = ISP_READ(isp, OUTMAILBOX0);
while (ISP_READ(isp, OUTMAILBOX0) == MBOX_BUSY) {
ISP_READ(isp, OUTMAILBOX0), ISP_READ(isp, OUTMAILBOX1),
if (isp_pci_rd_debounced(isp, OUTMAILBOX0, mbp)) {
*mbp = BXR2(pcs, IspVirt2Off(isp, OUTMAILBOX0));
*mbp = BXR2(sbc, IspVirt2Off(isp, OUTMAILBOX0));