iop_read1
do { c2 = iop_read1(ioph, IOP_ADDR_ALIVE); cs++; } while (c2 != 0xff);
m = iop_read1(ioph, IOP_ADDR_MAX_SEND_CHAN);
s = iop_read1(ioph, IOP_ADDR_SEND_STATE + i);
m = iop_read1(ioph, IOP_ADDR_MAX_RECV_CHAN);
s = iop_read1(ioph, IOP_ADDR_RECV_STATE + i);
static inline int iop_read1(IOPHW *, u_long);
alive = iop_read1(ioph, IOP_ADDR_ALIVE);