QE_MRI_PLSCC
bus_space_write_1(t, mr, QE_MRI_PLSCC, QE_MR_PLSCC_TP);
v = bus_space_read_1(t, mr, QE_MRI_PLSCC);
switch (bus_space_read_1(t, mr, QE_MRI_PLSCC) & QE_MR_PLSCC_PORTMASK) {
plscc = bus_space_read_1(t, mr, QE_MRI_PLSCC) & ~QE_MR_PLSCC_PORTMASK;
bus_space_write_1(t, mr, QE_MRI_PLSCC, plscc);