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POST BIOS CMOS ROM

POST BIOS CMOS ROM. POST. Power On Self Test. What happens in POST?. Tells your components to test itself. The programing will then launch its own appliance to test itself. Disclaimer- POST is only as good as the components manufactures make it. BIOS. Basic Input Output Service.

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POST BIOS CMOS ROM

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  1. POST BIOS CMOS ROM

  2. POST • Power • On • Self • Test

  3. What happens in POST? • Tells your components to test itself. The programing will then launch its own appliance to test itself. • Disclaimer- POST is only as good as the components manufactures make it.

  4. BIOS • Basic • Input • Output • Service

  5. BIOS Task • Supports hardware that never changes, • Example Internal speaker controller and Keyboard controller • Supports hardware that might change from time to time • Any removable component on your computer

  6. CMOS • Complementary • Metal-oxide • Semiconductor

  7. BIOS VS CMOS • Are they not the same thing? • NO but! • CMOS • CMOS stores all of the data that is read by the BIOS. • The CMOS does NOT store programs. CMOS only stores data.

  8. ROM • Read • Only • Memory

  9. ROM VS RAM • ROM has two very different characteristics • Nonvolatile memory - information store on memory does not get erased when computer turns off. • Once you write a program to ROM you cannot change it.

  10. Flashing ROM VS ROM • Older style • Cannot be flash • Newer style ROMs or Flash ROM • Can be Flash it is call "Flashing the ROM"

  11. Why ROM? • CMOS • BIOS • POST • Devices

  12. ESD • http://videos.totalsem.com/video/4

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