IOM_SPECIAL_STATUS_CHAN 3399 src/dps8/dps8_iom.c     uint chanloc = mbxLoc (iom_unit_idx, IOM_SPECIAL_STATUS_CHAN);
IOM_SPECIAL_STATUS_CHAN 3443 src/dps8/dps8_iom.c     send_general_interrupt (iom_unit_idx, IOM_SPECIAL_STATUS_CHAN, imwSpecialPic);