“In which chip/chips are located post, bios, setup and boot”

Question

Hello everyone,

I’ve always wondered where this four programs are located, because there are not available on hard drive, but there are first programs which pc notices while starting up. My guess is ROM, but not sure. I suppose there are more chips on which are this programs located?

In: 4

Answer 1

You are correct that there’s a ROM chip (technically, an EPROM, as it’s reprogramable) that contains the BIOS (Basic Input Output System). The BIOS contains the mini programs for the Power On Self Test, Setup and Boot.

As for the Boot program, all it does is read the data from the Master Boot Record of the hard drive, which is a standard, loads the boot sequence from there, executes it and from thereon, the sequence handles the rest of the operating system.