Getting ready for an exam...
My first post here :D getting ready for op-sys exam and had a few questions the answer to which i cant really find on the web, was wondering if you guys could help me out:
Do I have to go in to kernel mode in order to input/output (programatically), updating the system clock, disabling interrupts, and loading of Load or Limit registers?
Is process Waiting mode just another name for Blocked mode?
And if I initialize a semaphore to negative value, would it have any meaning, or will it be a semaphore that doesnt do anything?