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How same OS works for different processor architecture?

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Lets say I have windows 7.

This OS I can install on Core 2 duo, dual core, core i3 and so on.... even though number of cores and threads are different for different processor. Then How OS Schedules the process for it?

Even different processor have different architecture for reading and executing instruction, how OS takes care of it? I mean how OS prepares the instruction for it?

posted Nov 2, 2015 by Chirag Gangdev

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1 Answer

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I hope I understood your question correctly,

Each OS has two section one is hardware dependent section and other is hardware independent one. When we install a OS on two different hardware which uses different instruction set then two different hardware dependent section take care of it.

answer Nov 2, 2015 by Salil Agrawal
Sir, You mean OS will check which type of processor architecture it has and then prepares instruction as per it.. right?
No, its one time. Hardware Layer is bind only once.
Sir, i guess you din't understand my question correctly.

Basically what i am asking is, suppose i have a single 32 bit Windows 7 OS.
I have 4 systems each have different different processor.(Core 2 duo, core i3, core i5, etc etc).
Now all this processor have their own architecture depending upon their number of cores and threads.
I am able to install and run this OS on all 4 systems.. right?
So, my question is does OS made up in this way that first it detect the architecture type and then saves it for future reference?
I all four cases instruction set is same :)
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