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Welcome to:

CSC225Introduction to Computer Organization

Paul Hatalsky

Julie Workman

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Where this class fits in

Transistors

Logic

Implementation

Computer Organization

Instruction Set Architectures

Input/Output Interfaces

Assembly Programming

Compiler

High-Level Language101,102,103

129

229

225

430,431

315

Note: This should be a 3-dimensional picture to showdepth of details.

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Introduction to the World of ComputingComputer: electronic genius?

• NO! Electronic idiot!• Does exactly what we tell it to, nothing more.

Goal of the course:

You will be able to write programs in Cand understand what’s going on underneath.

Approach:Build understanding from the bottom up on the LC-3!

Bits Gates Processor Instructions C Programming

129 315 225

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Why are we learning this stuff???Abstraction

• Productivity enhancer – don’t need to worry about details…

Can drive a car without knowing howthe internal combustion engine works.

• …until something goes wrong!

Where’s the dipstick? What’s a spark plug?• Important to understand the components and

how they work together.

Hardware vs. Software• It’s not either/or – both are components of a computer system.• Even if you specialize in one,

you should understand capabilities and limitations of both.• Must at least learn characteristics of both if not details

Because we should know…

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This is the LC-3!

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Will learning the LC-3 teach me anything about a real computer?

All computers, given enough time and memory,are capable of computing exactly the same things.

= =PDA

WorkstationSupercomputer

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Course Outline

Bits and Bytes• How do we represent information using electrical signals?

Digital Logic• How do we build circuits to process information?

Processor and Instruction Set• How do we build a processor out of logic elements?

• What operations (instructions) will we implement?

Assembly Language Programming• How do we use processor instructions to implement algorithms?

• How do we write modular, reusable code? (subroutines)

I/O, Traps, and Interrupts• How does processor communicate with outside world?

C Programming• How do we write programs in C?

• How do we implement high-level programming constructs?

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Welcome!

Class Organization• Two midterms

• Written final

Grading• Homework – 0%

• Labs – 30%

• Midterms – 20% each

• Written Final – 30%

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PoliciesLate Policy – No late labs. Turn in what you have.

Plagiarism• Lab write-ups are individual (unless I specifically allow

partners)• You may not look at someone’s working code. • No one else may type anything into the code.• Discuss concepts and implementation strategies all that you

want.

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Policies

Homework• Work together if you wish, but TRY the problem yourself

before you get help.• Good way to study for tests.• At least one question per midterm will come directly from

the homework.

Exams• 2 Midterms – 1 side of 1 page (8.5 x 11) handwritten notes• 1 Written Final – 2 sides of one page of handwritten notes

(the final may have an on computer portion).

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Lab Write-ups•Answer Questions•Include Specified Code

• Code must be well commented• Please print code in a Courier-esqe font

•Cover Page (See Polylearn for an Example)• Lab Number• Your name• Date• Place to sign that says you did the work yourself• Demo signature line (for me)

•Be Professional!!!

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Questions???

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Let’s talk about binary and hexidecimal…

1001 1101 0010 0101 9D25