CPM_ER
dcr_write(cpm.dcr_host, cpm.dcr_offset[CPM_ER], er_save);
cpm.dcr_offset[CPM_ER] = 0;
cpm.dcr_offset[CPM_ER] = 1;
cpm_set(CPM_ER, cpm.unused);
er_save = cpm_set(CPM_ER, mask);