OperandRead      1007 src/dps8/dps8_append.c         case OperandRead:       return "OperandRead";
OperandRead      1284 src/dps8/dps8_eis.c             e->addr [k - 1].mat = OperandRead;      // no ARs involved yet
OperandRead      1311 src/dps8/dps8_eis.c           e->addr [k - 1].mat = OperandRead;      // no ARs involved yet