Hi Folks,
Ever wondered what happens when u trun on a system, be it a windows or linux or any other OS ? well, here is a chance for us to learn what happens when we trigger the power button on an HP system. This small journey of ours will drive us to the booting process, startup and shutdown process of HP-UX.
A set of code or instructions is written on how a system should act when initiated a boot called the Processor dependent code (PDC) . This code (PDC) executes and performs self-tests and some initialization tasks. The code that we are talking here is set on a piece of chip called the ROM.
What is ROM : Read-Only Memory or ROM is an integrated-circuit memory chip that contains configuration data. ROM is commonly called firmware because its programming is fully embedded into the ROM chip. As such, ROM is a hardware and software in one.
Once the self-tests and the starting initialization part is completed this code then loads the HP-UX kernel and hands control to the kernel. Now the kernel gets in action which does a number of system initializaiton tasks before we get to a login prompt on a console or terminal.
This Blog of mine talks about few of the technical aspects that i have got my hands on. It is just the begning and i hope to input a lot more information for which the quest has already begun. Also would be delighted if my viewers can printf their # comments and of course relavent information.
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