Introduction to Computer Organization

Identify a computer as a machine that does work for people by instructions. Describe it as a device for storing and processing data in binary, per a variable program's instructions.

Explore a simple computer with a cpu, main memory, I/O devices, and a system bus, plus the processor's control unit, ALU, and registers, including instruction fetch and decode.

A program provides a list of ordered machine instructions that a computer executes sequentially, with conditional jumps, performing arithmetic, load/store, and input/output operations.

Explore how programming languages bridge the gap between human instructions and machine zeros and ones, and examine the first three generations of languages in historical order.

Machine language uses zeros and ones directly understood by hardware, offering speed but being hard to read and not universal across processors; this prompted assembly language.

Explore assembly language as a readable form. Use mnemonic codes and symbolic addresses translated by an assembler, featuring 1-to-1 machine code correspondence and architecture dependence that limits portability.

High-level languages like C, C++, Java, and Python stay close to natural language and math, stay hardware independent, and enable portability; compilers translate to assembly and machine code.

Explore the Von Neumann machine model, including the CPU with an ALU and register file, main memory, and control unit with a program counter and fetch–decode workflow.

Explore how a von Neumann machine executes programs via a fetch, decode, and execute cycle, using the program counter to fetch instructions from memory and store results in destination register.

Explore instruction execution with a simple cpu model, illustrating fetch-decode-execute cycles, program counter, memory, registers, and the ALU computing X plus Y to 30.

Discover how a multicore processor on a single chip hosts multiple independent CPUs with private caches and a shared cache, enabling true parallelism for parallel or multithreaded workloads.

Survey the spectrum of processors beyond laptops, from disposable RFID CPUs to microcontrollers in watches, appliances, and cars. Examine devices, game-optimized CPUs, graphics cards, and servers, from supercomputers to mainframes.

Explore binary numbers, bits, bytes, and nibble, and examine how words—groups of contiguous bytes—define architecture-dependent memory, while computers represent non-negative and negative integers, floating point numbers, and character and multimedia data.

Explore base-10 and decimal representations of non-negative integers, from infinite-length to fixed-length with 16-bit constraints, and learn how digits map to powers of ten to compute magnitude.

Learn binary numbers as base two with digits 0 and 1, convert to decimal by summing powers of two, and memorize common powers up to 2048.

Explore binary to decimal conversion using a step-by-step example of the binary number 101101, multiply each digit by the corresponding power of two, and sum the results to get 45.

Learn decimal to binary conversion using subtraction and division methods, expanding on prior binary-to-decimal techniques to understand magnitude.

Use the subtraction method in decimal-to-binary conversion: repeatedly subtract the largest power of two, mark bits from zero, as shown in the 90 example yielding 1011010.

Convert a decimal number to binary using the division and remainder method, illustrated with 177, and show how to read remainders bottom-up for the shortcut.

Convert the decimal number 489 to binary using long division by two, collecting remainders to read bottom-up as 111101001.

Discover floating point representation, binary arithmetic, and data representations for integers, real numbers, negatives, characters, images, and sound in modern computers.