Everybody and welcome to the next video in the operating system internals module.
Now this video we're gonna be going over something called flags.
Now what our flags flags as a special type of register are similar to yay X etc. that holds a bitmap
of sorts of data.
Now each bit represented by a one or zero will change based on what the CPO is doing or what options
that it has enabled for whatever application or for the kernel itself.
Now understanding these are important in working with HSN because certain flags will indicate something
happened.
So if you do division you need to understand whether the overflow flag was set or the Zero flag was
set in a particular case.
Now where there's a full list of flags above the video and in another link however will hit we'll hit
three common ones so again the carry flag is commonly used for division when there is a carrier remainder
that was set or that was available.
Then you'd have the carry flags set and if there wasn't a remainder available it wouldn't be so understanding
that knows whether or not you need to grab that extra bit of data.
The Zero flag is also used within Division and other arithmetic operations.
This is also used when controlling the flow of logic.
We're not gonna get too much into that but it's an important flag to have.
Now the overflow flag again when something doesn't fit into the 32 bit register it will be over flown
into the next register that's available now it's important to understand that there are data that you
might.
There is data you might work with.
That's more than thirty two bits.
So the overflow flag will be set.
Another is a large sum of them again they're in the description above in the link.
Take.
Take a little bit of time look through some of the flags get familiar with what they mean that lead
you down other different topics which you can research as well understanding just some of these these
three basic ones An example is good enough to kind of get get working with assembly but understanding
what flags are set at what point in time depending on what you might be working with is an important
thing to know.