We decide to remove the four indirect instructions (LoadI, AddI, StoreI, JumpI) from MARIE and replace them with a 1-bit I-mode (like the PDP10) to indicate direct or indirect addressing. MARIEs instruction format is now: opcode mode operand This change causes MARIE to go from 15 instructions to 11 but requires the mode bit. Where will that extra bit come from and what hardware will be impacted by making that change?