EXECUTE: begin case (opcode) 8'h01: begin // LDA immediate reg_write = 1'b1; reg_sel = 2'b00; // Write to ACC next_state = FETCH; end
. A standard 8-bit design typically includes an Arithmetic Logic Unit (ALU), a Register File, a Program Counter (PC), and a Control Unit. ece.anits.edu.in 1. Define the Arithmetic Logic Unit (ALU) 8-bit microprocessor verilog code
// The instruction opcode is the first byte at the current PC // For simplicity, we assume mem_read_data is the opcode during fetch assign instruction_opcode = mem_read_data; assign mem_addr = pc_current; assign mem_write_data = acc_data; EXECUTE: begin case (opcode) 8'h01: begin // LDA
: Accumulator (A), Program Counter (PC), and Instruction Register (IR). ALU : Performs Addition, Subtraction, and logical AND. Define the Arithmetic Logic Unit (ALU) // The
The "soul" of the processor is its instruction set. We will define a minimal set of instructions to demonstrate functionality. We will assume an 8-bit instruction word where the are the Opcode and the lower 4 bits are the Operand (address).
To build an 8-bit microprocessor in Verilog, you must define its architecture through specific hardware modules that work together in a Fetch-Decode-Execute