80s Computer Science Fundamentals

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4 lessons · Novice

Lesson 1 of 4

Home Computers of the 1980s

Lesson 2 of 4

Microprocessor Architecture and ISA

About this study

“80s Computer Science Fundamentals” is a free, 4-lesson study on 80s computer science at novice, created with soclever, a personal AI teacher. Each lesson takes a few minutes and ends with a check-in question; finish the curriculum and you can take a certificate test to earn a diploma. Starting is free once you sign in — or generate your own study on any topic. Shared by @admin.

What you'll learn

  1. Home Computers of the 1980s. Most people think the 1980s had one dominant home computer that everyone used. That's not true. The decade was fragmented—different machines ruled different corners of the market,…
  2. Microprocessor Architecture and ISA. A processor is a tool that follows a fixed set of commands, and those commands are all it can do. The instruction set architecture, or ISA, is the rulebook—it defines every single…
  3. Assembly Language and Machine Code. Your Commodore 64 only understands one language: sequences of numbers that represent electrical signals—that's machine code. A microprocessor reads these numbers and executes…
  4. Memory Constraints and Algorithm Complexity. A Commodore 64 shipped with 64 kilobytes of RAM—not megabytes, kilobytes. That's roughly the size of one small photo on your phone. Every line of Assembly language code you wrote…

Questions this study answers

  • Why couldn't you take a program written for a Commodore 64 and run it on an Apple II?
  • Why did 80s programmers have to be so careful about moving data between registers and main memory?
  • Why would a programmer choose to write in assembly language on a 1980s home computer instead of using a higher-level language?
  • Why would an 80s programmer choose to sort a list by swapping items in place rather than creating a copy of the list?

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