Processor Design Part 2

Circuits due Mon Nov 11th by 11:59pm in your Lab06 GitHub Repo

Requirements

1. For this lab, please use an incremental development approach and commit two top-level circuits: lab06-part1.dig and lab06-part2.dig.
2. Each top-level circuit should contain its own decoder circuit to identify instructions and propagate the appropriate control signals.
3. For this lab you will combine your work from lab05 with a new implementation of the control lines as described in the Processor Guide Part 2
4. Use the spreadsheet approach to develop a decoder table that associated inputs (opcode, funct3, funct7, and funct6) with decoder outputs (RFW, ALUOp, etc.).
5. You must have inputs for CLK, EN, CLR, and PROG, and outputs for A0, A1, A2 and DONE
6. Submit all your .dig files, .s and .hex files, and a PDF of your instruction decoder spreadsheet.

Part 1

1. Build decoders (for instructions, registers, and immediates) and top-level processor circuit which can execute this program (also given in the Guide)

    first_s:
        li a0, 1
        li a1, 2
        add a2, a0, a1
        unimp
   

   Part 2

2. Build the control and top-level processor circuit which can execute this program (also given in the Guide)

    main:    
        li a0, 1
        li a1, 2
        jal first_s
        unimp
    first_s:
        add a0, a0, a1
        ret
   

   Given

3. You may use any of the circuits shown in the Processor Guide Part 2
4. You may use any of Digital’s built-in components, or your own if you prefer.

Rubric

100 pts: 50 pts for each part, as shown by the autograder