ZSWR0_CLR_INTR
zc->zc_csr = ZSWR0_CLR_INTR;
zc->zc_csr = ZSWR0_CLR_INTR;
zc->zc_csr = ZSWR0_CLR_INTR;
zc->zc_csr = ZSWR0_CLR_INTR;
sccA[2] = ZSWR0_CLR_INTR; unit = sccA[2]; /* reset any pending ints. */
sccA[0] = ZSWR0_CLR_INTR; unit = sccA[0];
zs_write_csr(cs0, ZSWR0_CLR_INTR);
zs_write_csr(cs1, ZSWR0_CLR_INTR);