iop_write1
iop_write1(ioph, IOP_ADDR_ALIVE, 0);
iop_write1(ioph, IOP_ADDR_SEND_STATE + msg->channel, IOP_MSG_NEW);
iop_write1(ioph, IOP_ADDR_SEND_STATE + chan, IOP_MSG_IDLE);
iop_write1(ioph, IOP_ADDR_RECV_STATE + chan, IOP_MSG_COMPLETE);
static inline void iop_write1(IOPHW *, u_long, u_char);
iop_write1(ioph, IOP_ADDR_ALIVE, 0);