Explain the procedure for operating a computer from the inside?

Question

like what goes on inside a computer the second you push the on button.

Answer 1

Each time the computer boots up the computer must past the POST. Below is the common procedure of the POST:
1. The first step of POST is the testing of the Power Supply to ensure that it is turned on and that it releases its reset signal.
2. CPU must exit the reset status mode and thereafter be able to execute instructions.
3. BIOS must be readable.
4. BIOS checksum must be valid, meaning that it must be readable.
5. CMOS be accessible for reading.
6. CMOS checksum must be valid, meaning that it must be readable.
7. CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
8. The first 64KB of memory must be operational and have the capability to be read and written to and from, and capable of containing the POST code.
9. I/O bus / controller must be accessible.
10. I/O bus must be able to write / read from the video subsystem and be able to read all video RAM..

If the computer does not pass any of the above tests, your computer will receive an irregular POST. An irregular POST is a beep code which is different from the standard, which can be either no beeps at all or a combination of different beeps indicating what is causing the computer not to past the POST.

Answer 2

Hi. Yes, the POST (Power On Self Test) is very important. After that is successful the computer loads info from the boot sector of the harddrive which tells it what to do next. It has an amazing amount of tasks to load the operating system, drivers, settings, etc. to be able to run. And all you do is push a button.

Answer 3

Yes, the above POST description right; just add continue on from the end:

depending on CMOS boot up setting, let's say normal HD boot into Windows or Linux or others like OS/2, computer typically read programming data from the head address on the hard drive, this is usually hidden only accessible from bootloader programs as they need recreate boot, MBR it is called.

MBR held booting and even partition records, this dictates the kernel either XP or others where that kernel is located. Then read off the bootup from them.

At this point, rules of the game is now in the hands of XP or Linux or whatever.

Answer 4

The hamsters scramble! No, an electric impulse speeds down the wire.