
Design a RISC processor with a custom instruction set architecture, detailing instruction types, formats, and the execution flow through core modules with example code.
The lecture outlines general features of RISC and its ISA, including simple fixed-length instructions, uniform opcodes, and load-store operations within a Harvard architecture.
Explore the features of any computer, including fixed instruction sets and addressing modes, memory architecture, and pipeline design. Examine how cycles of execution and code and data memory shape performance.
Explore the seven 32-bit general purpose registers, the program counter, and the stack pointer in this RISC ISA, and how they support addressing and push-pop operations.
Discover the instruction types in a risc processor and their addressing modes, including arithmetic, logical, load and store data transfer, and control flow, plus unconditional jumps and conditional branches.
Explore r-type instructions in a risc processor, illustrating seven addressing combinations, a six-bit instruction format, and how add, or, shift, and compare operations encode with registers like r1 and r2.
Explore immediate type instructions in a RISC ISA, showing how immediate values are embedded in instructions, loaded into R1, and combined with arithmetic operations.
Explore j-types of instructions in a RISC processor with its own ISA, detailing unconditional jumps and the 26-bit instruction format.
Explain B-type branch instructions in a RISC ISA, including conditional branches like if equal, if not equal, and BLT, and how comparisons direct program flow to target addresses.
Explore load and store instruction types in a RISC ISA, including instruction formats, how memory and registers interact, and how addressing and displacement influence operation.
We analyze and summarize our own instruction format, decode instruction sequences, and extract fields to simplify programming with clearly defined type and B-type branch instructions.
Explore the architecture of a RISC processor, detailing code memory, program counter, fetch-decode-execute flow, opcode decoding, registers, and data memory with load and store operations.
Explore how the instruction memory unit stores and loads programs, writes code in a notepad, and uses opcode-based formats and control signals to drive a RISC processor.
Examine how the fetch unit selects a line from memory and passes it to the decoder. Analyze how the counter and control logic manage memory access and data delivery.
Understand how the decoder unit splits instruction data into opcode and register fields, and study the instruction format with specific bit ranges for opcode, source and destination, and immediate data.
Learn how the register file supports read and write operations in a risc processor, including address selection, decoder signals, buffering, and the flow of data between registers and memory.
Examine how the ALU works with the decoder and register file to execute add, sub, and xor operations via opcodes and immediate data, including load and branch handling.
Explain how data memory operates in a Harvard architecture, detailing how write and read operations use control signals to transfer data between memory and the registers.
control unit coordinates fetch, decode, and execute cycles by issuing load signals and guiding the decoder, alu, and data memory.
In this course, discussing on Instruction set Architecture, how we can built our own ISA, and what are types of instructions, how can specify the address of instruction. How to define Instruction format. And prepared the possible instruction types and naming the opcode as well as giving our own address and naming to the instruction.
From this course, we discussed start with features in RISC and what features we need to look, so that get clarity in how to think about processor.
Next start with instruction set architecture, think of possible registers, and analyze how we can address specification to all our registers. and think of possible types of instructions by considering addressing modes. that name it as R-type, i-type, J-type, B-type, Load type and Store type. we need to define instruction format to all the types of instructions. in each type there may be combination different instructions like Arthimatic and Logical and shift instructions. here instruction format is discussed with example and position of each register like source register and destination register.
Also discussed about Architecture of RISC and individual modules. Analyze the flow of execution of instructions through different modules like Instruction memory unit, Fetch unit, Decoder unit, Register file unit, ALU and Data memory.
Instruction Memory unit is nothing but code memory and it contains set of instructions, and these instructions are arranged with opcode, source address, destination address and immediate data with specified analysis.
Fetch unit extracts the single instruction at a time and giving to decoder unit. Decoder unit separates fetched instruction in to opcode, source address, destination address and immediate data. And these items are assigned to Register file.
Register file contains all the registers and opcodes and mnemanics along with content and memory controller. Content of corresponding source addresses extracted from register file and given to ALU and executes the required operation using opcode given. Result of ALU will store in to Data memory and again back to register file.
This course gives complete picture of the RISC processor and its flow.