Question: 5. (8 Pts) A MARIE-based computer has a memory unit with 20 bits per word. The instruction set consists of 64 different operations. All instructions

5. (8 Pts) A MARIE-based computer has a memory unit with 20 bits per word. The instruction set consists of 64 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory a. How many bits are needed for the opcode? ?? b. How many bits are left for the address part of the instruction? What is the maximum allowable size for memory if addressing mode is direct only? c. Given an instruction in hex of ABCDE. In hex, what is the opcode and what is the address? d

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