1 / 26

CSCI 1200 / ASSC 1000

CSCI 1200 / ASSC 1000. Jbenoit@cs.dal.ca. Software. program : instructions for hardware. makes computers useful. early computers : re-wiring. today : programming languages. Fast & Stupid. very basic instructions : math, logic, move & copy values, etc… results achieved through speed.

asher-mcgee
Download Presentation

CSCI 1200 / ASSC 1000

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. CSCI 1200 / ASSC 1000 Jbenoit@cs.dal.ca

  2. Software • program : instructions for hardware. • makes computers useful. • early computers : re-wiring. • today : programming languages.

  3. Fast & Stupid • very basic instructions : • math, logic, move & copy values, etc… • results achieved through speed. • computers are unforgiving, instructions must be precise.

  4. Programming • algorithm – general procedure • programming – handle the specifics • debugging – finding and fixes errors.

  5. Languages • Machine Language • Assembly Language • High Level Programming Language • Natural Language

  6. Machine Language • understood by the hardware. • executed by the CPU. • binary strings. • instruction set.

  7. Assembly Language • mnemonics mapped to bit strings. • slow & error-prone for people. • better hardware performance.

  8. 0000010010000000 0000000010000001 0000010110000000 0000111100000000 LOAD128 ADD129 STORE128 HALT

  9. High Level Language • more familiar for people. • english-like structure. • examples : C, C++, Java, FORTRAN, and Visual Basic.

  10. High Level Language var x; var y; if (x == 2) then x = y + 1; else x = 0; print(“the value of x is ”, x);

  11. Translation • Compiler / Interpreter • source code to machine code. • high level language is hardware independent, but translated to hardware dependant machine code.

  12. Kinds of Software • Translation Software • System Software : • Operating systems (Wiindows, UNIX,etc) • “talk” to the hardware • Application Software : • use operating system and hardware to do something, MS Word, netscape etc.

  13. System Software Operating System : • communication with peripherals • coordination • storing and retrieving data • running programs • managing memory • network communications • resource monitoring, account, security

  14. System Software Operating System Details : • Windows XP, Mac OS X, UNIX, Linux, Window CE • platform : OS and hardware (Wintel). • emulation : like something else.

  15. System Software Utility Programs : • repairing damaged files. • copy files from one storage device to another. • guarding against viruses. • may look like are of the OS.

  16. System Software Device Drivers : • control and interface a hardware component or peripheral. • may come with the operating system, or with the component.

  17. Input Devices Keyboards : • Qwerty / Dvorak / Alphabetic • ergonomic • compact • membrane • one handed • folding

  18. Input Devices `~ 1! 2@ 3# 4% 5^ 6^ 7& 8* 9( 0) [\{ ]} \\| '" ,< .> p y f g c r l /? += a o e u i d h t n s -_ ;: q j k x b m w v z

  19. Input Devices Pointing Device : • selecting from options / menus. • spatial tasks / graphics applications. • efficiency

  20. Input Devices : Pointing • Mouse : mechanical, light • Touch Pad : finger pressure • Track Ball : upside down mouse • Pointing Stick : TrackPoint, Isopoint • Joystick : and other gaming devices • Tablet & Stylus • Touch Screen

  21. Input Devices : Reading • Optical Mark Readers • Bar Code Readers • Magnetic Ink Character Readers • RFID Tags & Readers

  22. Input Devices : Reading • Optical Character Recognition • Handwriting recognition • Smart Whiteboard

  23. Input Devices : Digitizing • Scanner • Digital Camera • Video Digitizer • Digital Video Camera

  24. Output : Monitor • most familiar (VDT) • diagonally in inches • pixels, dpi, resolution • colour depth : number of colours that can be displayed at one time • video adaptor / video card • VRAM

  25. Output : Monitor • Liquid Crystal Display • Cathode Ray Tube

  26. Output : Printers • impact & non-impact • dot matrix printers & line printers • laser & ink jet • resolution • plotter • multi-function devices..

More Related