SAB_IPC
ipc = SAB_READ(sc, SAB_IPC);
SAB_WRITE(sc, SAB_IPC, ipc | SAB_IPC_VIS);
SAB_WRITE(sc, SAB_IPC, ipc);
SAB_WRITE(sc, SAB_IPC, SAB_READ(sc, SAB_IPC) | SAB_IPC_VIS);
SAB_WRITE(sc, SAB_IPC, SAB_READ(sc, SAB_IPC) & ~SAB_IPC_VIS);
SAB_WRITE(sc, SAB_IPC, SAB_READ(sc, SAB_IPC) | SAB_IPC_VIS);
SAB_WRITE(sc, SAB_IPC, SAB_IPC_ICPL);