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Cogs3 - Cogs3 The Macintosh Interface The interface How you...

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Cogs3 The Macintosh Interface The interface: How you interact with the computer The interface: information The basic components (QUIZ) 1. hard drive (long term storage)- holds programs and data 2. Random access memory (RAM) fast temporary memory – can randomly get to something that is holding information; don’t have to get there in order. Fast because you can skip to any spot, expensive, for doing calculations 3. Central Processing Unit- decision maker The motherboard 2 of the 3 main components, the CPU and RAM, are located on the Motherboard. The hard disk is in a peripheral device, through usually installed in this case. Of bits and bytes … Computer memory Bit 1 Bit value of a 0 or 1 (QUIZ) Nibble 4bits value 0 through 15 Byte 8 bits value 0 thru 255 or -128 thru 127 Kilobit 1,000 bits Kilobyte 1,000 bytes Kibibit 1,024 bits Kibibyte 1,024 bytes Bigger Bits Megabit 1,000,000 bits Megabyte 1,000,000 bytes a million Gigabyte 1,000,000,000 a (US) billion Terabyte 1,000,000,000,000 Petabyte 1,000,000,000,000,000 Wait a “bit” Bit is an acronym for binary digit Is the fundamental unit of computer memory and storage. Each binary digit (bit) can either hold 0 or 1 Why binary? Early electronics used relays (switches)
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Huh? By using groups of bits as a binary number, like an 8 bit byte reasonable numbers can be represented In decimal, 111 means (from left to right): (1x10^3)+(1x10^2)+(1x10^1)+(1x10^0) 0 0 1 1 2 10 3 11 4 100 5 101 6 110 7 110 8 111 9 1000 Your hard disk Semi permanent storage The bits and bytes of data on your hard disk are organized into a file system There are different file systems depending on what operation system (windows, Mac osx, Linux, Solaris, etc) you are using File systems- Microsoft uses file systems called FAT, FAT32, and NTFS Macintosh file system is called HFS When you go to website basically Linux UNIX Home directory is your account, ie: cg3waa How are they the same? Basic storage unit of a hard disk is sector (512 bytes or 512x8 bits) Basic storage unit in a file system is : cluster or block Consists of several adjacent sector File program directory, date free Input entering information in Keyboard differences MAC no alt key but there is an option key and an apple/command/cmd/clover key Cmd is used in conjunction with other keys as a keyboard shortcut Return key instead of enter
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A mouse is a mouse.. right? Mac mouse:1 button Click one: select Click twice: open Click thrice: select an entire region Pc mouse: 2 buttons Emotion sensing mouse Contact with hard: heart rate, body temp, palm sweat Input: speech Speech comprehension is a very processor intensive task Hard for humans Speech input packages 60-190 $$ Speech recognition: extensive training and has a limited vocabulary More exotic- biometrics To san your finger prints or retina. Latest operation system First released in 2001 The main parts: Darwin Mach microkernel Aqua Darwin is the core Runs on an open source kernel called XNU Integrates a number of technologies Mach 3.0 Kernel 4.4 BSD high performance networking facilities support for multiple integrated file systems eg Macs can work with windows file systems
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