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Chapter 2 - Hardware Basics: Inside the Box
- Wozniak, Jobs and the Garage that Grew Apples
- First ready-to-use personal computer - Apple I
- Why would people want those?
- Big manufacturers like IBM neglected this market
- Late, IBM saw the light, launched the IBM-PC
- Apple, inspired by Xerox revolutionized the market
- Anyone makes "IBM" machines, only Apple makes
- What Computers Do
- Receive input
- Process information
- Store information
- Produces Output
- A Bit about Bits
- Bit Basics
- How it Works: Binary Numbers
- Imagine writing numbers only with 0's and 1's:
- Your times tables? Piece of cake!
- Addition: 0+0=0, 0+1=1, 1+0=1, 1+1=0 and carry
- Multiplication: 0x0=0, 0x1=0, 1x0=0, 1x1= 1
- Building with Bits
- Use a group of 8 bits (byte) for each code
- 256 different codes are possible (ASCII)
- A 01000001
- B 01000010
- C 01000011
- Bits, Bytes and Buzzwords
- UNICODE a code using 16 bits (up to 65,000 codes
- Supports characters not in the Latin alphabet
- How it Works: Representing the World's Languages
- The Computer's Core: CPU and Memory
- The CPU - The Real Computer
- Working Wisdom: Green Computing
- How it Works: The CPU
- Clock speed (GigaHertz)
- Word Size
- MultiCore processors
- Multiprocessors, Clusters and Blades
- The Computer's Memory
- RAM, ROM
- Access times (nanoseconds)
- Capacity KB,MB,GB
- How it Works: Memory
- Buses, Ports and Peripherals
- Inventing the Future: Tomorrow's Processors
- 1946 "Only 6 computers will ever be sold"
- IBM (1950's) Computer will not affect the market of
- Microcomputers Invented (1970's)
- Intel - the way to make money with microcomputers is
to have them embedded as control mechanisms like in cars, etc.
- Who will buy microcomputers?
- Why would I use Internet?
- Should I really have email?
- The fact is... no one could predict the next wave
where computers would affect our lives.