Wednesday, September 6th
Welcome Back!
Introduction to Binary - the language of computers
Review of the decimal system first
Now for a binary system
You must be able to convert between decimal and binary in both directions without a calculatorOther number systems - binary, octal, decimal, hexadecimal
What is half a byte?
ASCII and Unicode - converting letters to binary - page 78-79 blue book
For more practice play Binary Bonanza
Information flow inside the computer - how the major components work together.
L1 and L2 Cache Questions.
1. Refer to your POST lab, how fast was the CPU? How fast was the memory bus?
2. Why was cache developed?
3. How many levels of cache to modern CPUs have? (scroll to the bottom of this page and read the last two paragraphs and look at the last diagram - no need to read the entire article)
Please return to the original article- L1 and L2 Cache
4. These different levels of cache are found "on-die", what does this mean?
5. Read the last paragraph of this article, why not just load up a CPU with lots of cache?What are some of the physical problems that older adults have that can affect their use of computers?
Accessibility Wizard and Options - how to setup a computer for your grandpa
Complete CPU Specs activity
Complete 3.1 Hardware - health issues and ergonomics related to the use of hardware - who is responsible? Benefits?
Homework
Complete Binary Homework - the language of computers. For more practice play Binary Bonanza
Prepare for Binary Quiz Friday!L1 and L2 Cache Questions if you did not complete these in class.
Read page 23 - 29 in the green book.
Cindy and Imanol will present their news articles Friday.
News article due Friday, post to School Loop - the focus for this week is "What is the social impact?"
Add the following terms to your definitions spreadsheet — data, information, hardware components, for example, input devices, output devices, processing, storage, memory (RAM, ROM), MHz, dpi, bit, KB, MB, GB, TB, ASCII, compatibility, OCR, OMR, bar code, verification and validation, encryption/decryption, peripheral, operating systems (multitasking, boot) and utilities, for example, defragment, disk format, virus scan programs
repetitive strain injury (RSI), ergonomics.NOTE: These terms are meant to be defined as you read. Not all of these terms will be defined in this first reading so don't panic if you do not define all of these terms at once.
KB, MB, GHz, and more units.Possible scenario
A computer user is planning to upgrade their current computer system to a newer model and must use their
knowledge to:
• understand the specifications of the proposed new system
• evaluate other physical considerations that may influence the choice of the physical environment of
the proposed new system, such as ergonomics and other health-related issues
• suggest upgrades to the computer system to take advantage of improvements in components, such
as processing speed
• describe how the proper disposal of the old computer system can take place and whether the choice
of computer may be affected by the manufacturer’s policies on disposal.