Power of Abstraction
A well understood interface to underlying subsystems.
The system that connects cpu and memory
A bridge connects the I/O bus and the system buffer
which bus is higher speed system or I/O
system
what connects the system and I/O bus
bridge
which bus would a frame buffer be on
system
which bus would the mouse be on
I/O
Job of the OS
protected access to hardware resources. Arbitrate among competing request
What does the memory footprint contain?
Stack, heap and global data
What is a program
Static image loaded into memory
what is a process
a program in execution