mgp_port_num 878 src/dps8/dps8_cable.c uint mgp_port_num = 0; mgp_port_num 881 src/dps8/dps8_cable.c unit_idx, mgp_port_num, mgp_port_num 884 src/dps8/dps8_cable.c & cables->mgp_to_iom[unit_idx][mgp_port_num],